To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all
* activity classes must have a corresponding
* {@link android.R.styleable#AndroidManifestActivity <activity>}
* declaration in their package's AndroidManifest.xml.
Topics covered here: *
The Activity class is an important part of an application's overall lifecycle, * and the way activities are launched and put together is a fundamental * part of the platform's application model. For a detailed perspective on the structure of an * Android application and how activities behave, please read the * Application Fundamentals and * Tasks and Back Stack * developer guides.
* *You can also find a detailed discussion about how to create activities in the * Activities * developer guide.
*Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity * implementations can make use of the {@link Fragment} class to better * modularize their code, build more sophisticated user interfaces for larger * screens, and help scale their application between small and large screens. * * *
Activities in the system are managed as an activity stack. * When a new activity is started, it is placed on the top of the stack * and becomes the running activity -- the previous activity always remains * below it in the stack, and will not come to the foreground again until * the new activity exits.
* *An activity has essentially four states:
*The following diagram shows the important state paths of an Activity. * The square rectangles represent callback methods you can implement to * perform operations when the Activity moves between states. The colored * ovals are major states the Activity can be in.
* *
There are three key loops you may be interested in monitoring within your * activity: * *
The entire lifecycle of an activity is defined by the following * Activity methods. All of these are hooks that you can override * to do appropriate work when the activity changes state. All * activities will implement {@link android.app.Activity#onCreate} * to do their initial setup; many will also implement * {@link android.app.Activity#onPause} to commit changes to data and * otherwise prepare to stop interacting with the user. You should always * call up to your superclass when implementing these methods.
* * *
* public class Activity extends ApplicationContext {
* protected void onCreate(Bundle savedInstanceState);
*
* protected void onStart();
*
* protected void onRestart();
*
* protected void onResume();
*
* protected void onPause();
*
* protected void onStop();
*
* protected void onDestroy();
* }
*
*
* In general the movement through an activity's lifecycle looks like * this:
* *| Method | Description | Killable? | Next | ||
|---|---|---|---|---|---|
| {@link android.app.Activity#onCreate onCreate()} | *Called when the activity is first created.
* This is where you should do all of your normal static set up:
* create views, bind data to lists, etc. This method also
* provides you with a Bundle containing the activity's previously
* frozen state, if there was one.
* Always followed by |
* No | *onStart() |
* ||
| * | {@link android.app.Activity#onRestart onRestart()} | *Called after your activity has been stopped, prior to it being
* started again.
* Always followed by |
* No | *onStart() |
* |
| {@link android.app.Activity#onStart onStart()} | *Called when the activity is becoming visible to the user.
* Followed by |
* No | *onResume() or onStop() |
* ||
| * | {@link android.app.Activity#onResume onResume()} | *Called when the activity will start
* interacting with the user. At this point your activity is at
* the top of the activity stack, with user input going to it.
* Always followed by |
* No | *onPause() |
* |
| {@link android.app.Activity#onPause onPause()} | *Called when the system is about to start resuming a previous
* activity. This is typically used to commit unsaved changes to
* persistent data, stop animations and other things that may be consuming
* CPU, etc. Implementations of this method must be very quick because
* the next activity will not be resumed until this method returns.
* Followed by either |
* Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} | *onResume() or* onStop() |
* ||
| {@link android.app.Activity#onStop onStop()} | *Called when the activity is no longer visible to the user, because
* another activity has been resumed and is covering this one. This
* may happen either because a new activity is being started, an existing
* one is being brought in front of this one, or this one is being
* destroyed.
* Followed by either |
* Yes | *onRestart() or* onDestroy() |
* ||
| {@link android.app.Activity#onDestroy onDestroy()} | *The final call you receive before your * activity is destroyed. This can happen either because the * activity is finishing (someone called {@link Activity#finish} on * it, or because the system is temporarily destroying this * instance of the activity to save space. You can distinguish * between these two scenarios with the {@link * Activity#isFinishing} method. | *Yes | *nothing | *||
Note the "Killable" column in the above table -- for those methods that * are marked as being killable, after that method returns the process hosting the * activity may killed by the system at any time without another line * of its code being executed. Because of this, you should use the * {@link #onPause} method to write any persistent data (such as user edits) * to storage. In addition, the method * {@link #onSaveInstanceState(Bundle)} is called before placing the activity * in such a background state, allowing you to save away any dynamic instance * state in your activity into the given Bundle, to be later received in * {@link #onCreate} if the activity needs to be re-created. * See the Process Lifecycle * section for more information on how the lifecycle of a process is tied * to the activities it is hosting. Note that it is important to save * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} * because the latter is not part of the lifecycle callbacks, so will not * be called in every situation as described in its documentation.
* *Be aware that these semantics will change slightly between * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} * vs. those targeting prior platforms. Starting with Honeycomb, an application * is not in the killable state until its {@link #onStop} has returned. This * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be * safely called after {@link #onPause()} and allows and application to safely * wait until {@link #onStop()} to save persistent state.
* *For those methods that are not marked as being killable, the activity's
* process will not be killed by the system starting from the time the method
* is called and continuing after it returns. Thus an activity is in the killable
* state, for example, between after onPause() to the start of
* onResume().
If the configuration of the device (as defined by the * {@link Configuration Resources.Configuration} class) changes, * then anything displaying a user interface will need to update to match that * configuration. Because Activity is the primary mechanism for interacting * with the user, it includes special support for handling configuration * changes.
* *Unless you specify otherwise, a configuration change (such as a change * in screen orientation, language, input devices, etc) will cause your * current activity to be destroyed, going through the normal activity * lifecycle process of {@link #onPause}, * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity * had been in the foreground or visible to the user, once {@link #onDestroy} is * called in that instance then a new instance of the activity will be * created, with whatever savedInstanceState the previous instance had generated * from {@link #onSaveInstanceState}.
* *This is done because any application resource, * including layout files, can change based on any configuration value. Thus * the only safe way to handle a configuration change is to re-retrieve all * resources, including layouts, drawables, and strings. Because activities * must already know how to save their state and re-create themselves from * that state, this is a convenient way to have an activity restart itself * with a new configuration.
* *In some special cases, you may want to bypass restarting of your * activity based on one or more types of configuration changes. This is * done with the {@link android.R.attr#configChanges android:configChanges} * attribute in its manifest. For any types of configuration changes you say * that you handle there, you will receive a call to your current activity's * {@link #onConfigurationChanged} method instead of being restarted. If * a configuration change involves any that you do not handle, however, the * activity will still be restarted and {@link #onConfigurationChanged} * will not be called.
* * *The {@link android.app.Activity#startActivity} * method is used to start a * new activity, which will be placed at the top of the activity stack. It * takes a single argument, an {@link android.content.Intent Intent}, * which describes the activity * to be executed.
* *Sometimes you want to get a result back from an activity when it * ends. For example, you may start an activity that lets the user pick * a person in a list of contacts; when it ends, it returns the person * that was selected. To do this, you call the * {@link android.app.Activity#startActivityForResult(Intent, int)} * version with a second integer parameter identifying the call. The result * will come back through your {@link android.app.Activity#onActivityResult} * method.
* *When an activity exits, it can call
* {@link android.app.Activity#setResult(int)}
* to return data back to its parent. It must always supply a result code,
* which can be the standard results RESULT_CANCELED, RESULT_OK, or any
* custom values starting at RESULT_FIRST_USER. In addition, it can optionally
* return back an Intent containing any additional data it wants. All of this
* information appears back on the
* parent's Activity.onActivityResult(), along with the integer
* identifier it originally supplied.
If a child activity fails for any reason (such as crashing), the parent * activity will receive a result with the code RESULT_CANCELED.
* *
* public class MyActivity extends Activity {
* ...
*
* static final int PICK_CONTACT_REQUEST = 0;
*
* protected boolean onKeyDown(int keyCode, KeyEvent event) {
* if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
* // When the user center presses, let them pick a contact.
* startActivityForResult(
* new Intent(Intent.ACTION_PICK,
* new Uri("content://contacts")),
* PICK_CONTACT_REQUEST);
* return true;
* }
* return false;
* }
*
* protected void onActivityResult(int requestCode, int resultCode,
* Intent data) {
* if (requestCode == PICK_CONTACT_REQUEST) {
* if (resultCode == RESULT_OK) {
* // A contact was picked. Here we will just display it
* // to the user.
* startActivity(new Intent(Intent.ACTION_VIEW, data));
* }
* }
* }
* }
*
*
*
* There are generally two kinds of persistent state than an activity * will deal with: shared document-like data (typically stored in a SQLite * database using a {@linkplain android.content.ContentProvider content provider}) * and internal state such as user preferences.
* *For content provider data, we suggest that activities use a * "edit in place" user model. That is, any edits a user makes are effectively * made immediately without requiring an additional confirmation step. * Supporting this model is generally a simple matter of following two rules:
* *When creating a new document, the backing database entry or file for * it is created immediately. For example, if the user chooses to write * a new e-mail, a new entry for that e-mail is created as soon as they * start entering data, so that if they go to any other activity after * that point this e-mail will now appear in the list of drafts.
*When an activity's onPause() method is called, it should
* commit to the backing content provider or file any changes the user
* has made. This ensures that those changes will be seen by any other
* activity that is about to run. You will probably want to commit
* your data even more aggressively at key times during your
* activity's lifecycle: for example before starting a new
* activity, before finishing your own activity, when the user
* switches between input fields, etc.
This model is designed to prevent data loss when a user is navigating * between activities, and allows the system to safely kill an activity (because * system resources are needed somewhere else) at any time after it has been * paused. Note this implies * that the user pressing BACK from your activity does not * mean "cancel" -- it means to leave the activity with its current contents * saved away. Canceling edits in an activity must be provided through * some other mechanism, such as an explicit "revert" or "undo" option.
* *See the {@linkplain android.content.ContentProvider content package} for * more information about content providers. These are a key aspect of how * different activities invoke and propagate data between themselves.
* *The Activity class also provides an API for managing internal persistent state * associated with an activity. This can be used, for example, to remember * the user's preferred initial display in a calendar (day view or week view) * or the user's default home page in a web browser.
* *Activity persistent state is managed * with the method {@link #getPreferences}, * allowing you to retrieve and * modify a set of name/value pairs associated with the activity. To use * preferences that are shared across multiple application components * (activities, receivers, services, providers), you can use the underlying * {@link Context#getSharedPreferences Context.getSharedPreferences()} method * to retrieve a preferences * object stored under a specific name. * (Note that it is not possible to share settings data across application * packages -- for that you will need a content provider.)
* *Here is an excerpt from a calendar activity that stores the user's * preferred view mode in its persistent settings:
* *
* public class CalendarActivity extends Activity {
* ...
*
* static final int DAY_VIEW_MODE = 0;
* static final int WEEK_VIEW_MODE = 1;
*
* private SharedPreferences mPrefs;
* private int mCurViewMode;
*
* protected void onCreate(Bundle savedInstanceState) {
* super.onCreate(savedInstanceState);
*
* SharedPreferences mPrefs = getSharedPreferences();
* mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE);
* }
*
* protected void onPause() {
* super.onPause();
*
* SharedPreferences.Editor ed = mPrefs.edit();
* ed.putInt("view_mode", mCurViewMode);
* ed.commit();
* }
* }
*
*
*
* The ability to start a particular Activity can be enforced when it is * declared in its * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} * tag. By doing so, other applications will need to declare a corresponding * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} * element in their own manifest to be able to start that activity. * *
When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the * Activity access to the specific URIs in the Intent. Access will remain * until the Activity has finished (it will remain across the hosting * process being killed and other temporary destruction). As of * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity * was already created and a new Intent is being delivered to * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added * to the existing ones it holds. * *
See the Security and Permissions * document for more information on permissions and security in general. * * *
The Android system attempts to keep application process around for as * long as possible, but eventually will need to remove old processes when * memory runs low. As described in Activity * Lifecycle, the decision about which process to remove is intimately * tied to the state of the user's interaction with it. In general, there * are four states a process can be in based on the activities running in it, * listed here in order of importance. The system will kill less important * processes (the last ones) before it resorts to killing more important * processes (the first ones). * *
The foreground activity (the activity at the top of the screen * that the user is currently interacting with) is considered the most important. * Its process will only be killed as a last resort, if it uses more memory * than is available on the device. Generally at this point the device has * reached a memory paging state, so this is required in order to keep the user * interface responsive. *
A visible activity (an activity that is visible to the user * but not in the foreground, such as one sitting behind a foreground dialog) * is considered extremely important and will not be killed unless that is * required to keep the foreground activity running. *
A background activity (an activity that is not visible to * the user and has been paused) is no longer critical, so the system may * safely kill its process to reclaim memory for other foreground or * visible processes. If its process needs to be killed, when the user navigates * back to the activity (making it visible on the screen again), its * {@link #onCreate} method will be called with the savedInstanceState it had previously * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same * state as the user last left it. *
An empty process is one hosting no activities or other * application components (such as {@link Service} or * {@link android.content.BroadcastReceiver} classes). These are killed very * quickly by the system as memory becomes low. For this reason, any * background operation you do outside of an activity must be executed in the * context of an activity BroadcastReceiver or Service to ensure that the system * knows it needs to keep your process around. *
Sometimes an Activity may need to do a long-running operation that exists
* independently of the activity lifecycle itself. An example may be a camera
* application that allows you to upload a picture to a web site. The upload
* may take a long time, and the application should allow the user to leave
* the application will it is executing. To accomplish this, your Activity
* should start a {@link Service} in which the upload takes place. This allows
* the system to properly prioritize your process (considering it to be more
* important than other non-visible applications) for the duration of the
* upload, independent of whether the original activity is paused, stopped,
* or finished.
*/
public class Activity extends ContextThemeWrapper
implements LayoutInflater.Factory2,
Window.Callback, KeyEvent.Callback,
OnCreateContextMenuListener, ComponentCallbacks2,
Window.OnWindowDismissedCallback {
private static final String TAG = "Activity";
private static final boolean DEBUG_LIFECYCLE = false;
/** Standard activity result: operation canceled. */
public static final int RESULT_CANCELED = 0;
/** Standard activity result: operation succeeded. */
public static final int RESULT_OK = -1;
/** Start of user-defined activity results. */
public static final int RESULT_FIRST_USER = 1;
static final String FRAGMENTS_TAG = "android:fragments";
private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState";
private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds";
private static final String SAVED_DIALOGS_TAG = "android:savedDialogs";
private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_";
private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_";
private static class ManagedDialog {
Dialog mDialog;
Bundle mArgs;
}
private SparseArray You can call {@link #finish} from within this function, in
* which case onDestroy() will be immediately called without any of the rest
* of the activity lifecycle ({@link #onStart}, {@link #onResume},
* {@link #onPause}, etc) executing.
*
* Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. This method is called between {@link #onStart} and
* {@link #onPostCreate}.
*
* @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}.
*
* @see #onCreate
* @see #onPostCreate
* @see #onResume
* @see #onSaveInstanceState
*/
protected void onRestoreInstanceState(Bundle savedInstanceState) {
if (mWindow != null) {
Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG);
if (windowState != null) {
mWindow.restoreHierarchyState(windowState);
}
}
}
/**
* This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities
* created with the attribute {@link android.R.attr#persistable}. The {@link
* android.os.PersistableBundle} passed came from the restored PersistableBundle first
* saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}.
*
* This method is called between {@link #onStart} and
* {@link #onPostCreate}.
*
* If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called.
*
* @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}.
* @param persistentState the data most recently supplied in {@link #onSaveInstanceState}.
*
* @see #onRestoreInstanceState(Bundle)
* @see #onCreate
* @see #onPostCreate
* @see #onResume
* @see #onSaveInstanceState
*/
protected void onRestoreInstanceState(Bundle savedInstanceState,
PersistableBundle persistentState) {
if (savedInstanceState != null) {
onRestoreInstanceState(savedInstanceState);
}
}
/**
* Restore the state of any saved managed dialogs.
*
* @param savedInstanceState The bundle to restore from.
*/
private void restoreManagedDialogs(Bundle savedInstanceState) {
final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG);
if (b == null) {
return;
}
final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY);
final int numDialogs = ids.length;
mManagedDialogs = new SparseArray Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. For activities that are using raw {@link Cursor} objects (instead of
* creating them through
* {@link #managedQuery(android.net.Uri , String[], String, String[], String)},
* this is usually the place
* where the cursor should be requeried (because you had deactivated it in
* {@link #onStop}.
*
* Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. Keep in mind that onResume is not the best indicator that your activity
* is visible to the user; a system window such as the keyguard may be in
* front. Use {@link #onWindowFocusChanged} to know for certain that your
* activity is visible to the user (for example, to resume a game).
*
* Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. An activity will always be paused before receiving a new intent, so
* you can count on {@link #onResume} being called after this method.
*
* Note that {@link #getIntent} still returns the original Intent. You
* can use {@link #setIntent} to update it to this new Intent.
*
* @param intent The new intent that was started for the activity.
*
* @see #getIntent
* @see #setIntent
* @see #onResume
*/
protected void onNewIntent(Intent intent) {
}
/**
* The hook for {@link ActivityThread} to save the state of this activity.
*
* Calls {@link #onSaveInstanceState(android.os.Bundle)}
* and {@link #saveManagedDialogs(android.os.Bundle)}.
*
* @param outState The bundle to save the state to.
*/
final void performSaveInstanceState(Bundle outState) {
onSaveInstanceState(outState);
saveManagedDialogs(outState);
if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState);
}
/**
* The hook for {@link ActivityThread} to save the state of this activity.
*
* Calls {@link #onSaveInstanceState(android.os.Bundle)}
* and {@link #saveManagedDialogs(android.os.Bundle)}.
*
* @param outState The bundle to save the state to.
* @param outPersistentState The bundle to save persistent state to.
*/
final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
onSaveInstanceState(outState, outPersistentState);
saveManagedDialogs(outState);
if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState +
", " + outPersistentState);
}
/**
* Called to retrieve per-instance state from an activity before being killed
* so that the state can be restored in {@link #onCreate} or
* {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method
* will be passed to both).
*
* This method is called before an activity may be killed so that when it
* comes back some time in the future it can restore its state. For example,
* if activity B is launched in front of activity A, and at some point activity
* A is killed to reclaim resources, activity A will have a chance to save the
* current state of its user interface via this method so that when the user
* returns to activity A, the state of the user interface can be restored
* via {@link #onCreate} or {@link #onRestoreInstanceState}.
*
* Do not confuse this method with activity lifecycle callbacks such as
* {@link #onPause}, which is always called when an activity is being placed
* in the background or on its way to destruction, or {@link #onStop} which
* is called before destruction. One example of when {@link #onPause} and
* {@link #onStop} is called and not this method is when a user navigates back
* from activity B to activity A: there is no need to call {@link #onSaveInstanceState}
* on B because that particular instance will never be restored, so the
* system avoids calling it. An example when {@link #onPause} is called and
* not {@link #onSaveInstanceState} is when activity B is launched in front of activity A:
* the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't
* killed during the lifetime of B since the state of the user interface of
* A will stay intact.
*
* The default implementation takes care of most of the UI per-instance
* state for you by calling {@link android.view.View#onSaveInstanceState()} on each
* view in the hierarchy that has an id, and by saving the id of the currently
* focused view (all of which is restored by the default implementation of
* {@link #onRestoreInstanceState}). If you override this method to save additional
* information not captured by each individual view, you will likely want to
* call through to the default implementation, otherwise be prepared to save
* all of the state of each view yourself.
*
* If called, this method will occur before {@link #onStop}. There are
* no guarantees about whether it will occur before or after {@link #onPause}.
*
* @param outState Bundle in which to place your saved state.
*
* @see #onCreate
* @see #onRestoreInstanceState
* @see #onPause
*/
protected void onSaveInstanceState(Bundle outState) {
outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState());
Parcelable p = mFragments.saveAllState();
if (p != null) {
outState.putParcelable(FRAGMENTS_TAG, p);
}
getApplication().dispatchActivitySaveInstanceState(this, outState);
}
/**
* This is the same as {@link #onSaveInstanceState} but is called for activities
* created with the attribute {@link android.R.attr#persistable}. The {@link
* android.os.PersistableBundle} passed in will be saved and presented in
* {@link #onCreate(Bundle, PersistableBundle)} the first time that this activity
* is restarted following the next device reboot.
*
* @param outState Bundle in which to place your saved state.
* @param outPersistentState State which will be saved across reboots.
*
* @see #onSaveInstanceState(Bundle)
* @see #onCreate
* @see #onRestoreInstanceState(Bundle, PersistableBundle)
* @see #onPause
*/
protected void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
onSaveInstanceState(outState);
}
/**
* Save the state of any managed dialogs.
*
* @param outState place to store the saved state.
*/
private void saveManagedDialogs(Bundle outState) {
if (mManagedDialogs == null) {
return;
}
final int numDialogs = mManagedDialogs.size();
if (numDialogs == 0) {
return;
}
Bundle dialogState = new Bundle();
int[] ids = new int[mManagedDialogs.size()];
// save each dialog's bundle, gather the ids
for (int i = 0; i < numDialogs; i++) {
final int key = mManagedDialogs.keyAt(i);
ids[i] = key;
final ManagedDialog md = mManagedDialogs.valueAt(i);
dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState());
if (md.mArgs != null) {
dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs);
}
}
dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids);
outState.putBundle(SAVED_DIALOGS_TAG, dialogState);
}
/**
* Called as part of the activity lifecycle when an activity is going into
* the background, but has not (yet) been killed. The counterpart to
* {@link #onResume}.
*
* When activity B is launched in front of activity A, this callback will
* be invoked on A. B will not be created until A's {@link #onPause} returns,
* so be sure to not do anything lengthy here.
*
* This callback is mostly used for saving any persistent state the
* activity is editing, to present a "edit in place" model to the user and
* making sure nothing is lost if there are not enough resources to start
* the new activity without first killing this one. This is also a good
* place to do things like stop animations and other things that consume a
* noticeable amount of CPU in order to make the switch to the next activity
* as fast as possible, or to close resources that are exclusive access
* such as the camera.
*
* In situations where the system needs more memory it may kill paused
* processes to reclaim resources. Because of this, you should be sure
* that all of your state is saved by the time you return from
* this function. In general {@link #onSaveInstanceState} is used to save
* per-instance state in the activity and this method is used to store
* global persistent data (in content providers, files, etc.)
*
* After receiving this call you will usually receive a following call
* to {@link #onStop} (after the next activity has been resumed and
* displayed), however in some cases there will be a direct call back to
* {@link #onResume} without going through the stopped state.
*
* Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. This callback and {@link #onUserInteraction} are intended to help
* activities manage status bar notifications intelligently; specifically,
* for helping activities determine the proper time to cancel a notfication.
*
* @see #onUserInteraction()
*/
protected void onUserLeaveHint() {
}
/**
* Generate a new thumbnail for this activity. This method is called before
* pausing the activity, and should draw into outBitmap the
* imagery for the desired thumbnail in the dimensions of that bitmap. It
* can use the given canvas, which is configured to draw into the
* bitmap, for rendering if desired.
*
* The default implementation returns fails and does not draw a thumbnail;
* this will result in the platform creating its own thumbnail if needed.
*
* @param outBitmap The bitmap to contain the thumbnail.
* @param canvas Can be used to render into the bitmap.
*
* @return Return true if you have drawn into the bitmap; otherwise after
* you return it will be filled with a default thumbnail.
*
* @see #onCreateDescription
* @see #onSaveInstanceState
* @see #onPause
*/
public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) {
return false;
}
/**
* Generate a new description for this activity. This method is called
* before pausing the activity and can, if desired, return some textual
* description of its current state to be displayed to the user.
*
* The default implementation returns null, which will cause you to
* inherit the description from the previous activity. If all activities
* return null, generally the label of the top activity will be used as the
* description.
*
* @return A description of what the user is doing. It should be short and
* sweet (only a few words).
*
* @see #onCreateThumbnail
* @see #onSaveInstanceState
* @see #onPause
*/
@Nullable
public CharSequence onCreateDescription() {
return null;
}
/**
* This is called when the user is requesting an assist, to build a full
* {@link Intent#ACTION_ASSIST} Intent with all of the context of the current
* application. You can override this method to place into the bundle anything
* you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part
* of the assist Intent. The default implementation does nothing.
*
* This function will be called after any global assist callbacks that had
* been registered with {@link Application#registerOnProvideAssistDataListener
* Application.registerOnProvideAssistDataListener}.
*/
public void onProvideAssistData(Bundle data) {
}
/**
* Called when you are no longer visible to the user. You will next
* receive either {@link #onRestart}, {@link #onDestroy}, or nothing,
* depending on later user activity.
*
* Note that this method may never be called, in low memory situations
* where the system does not have enough memory to keep your activity's
* process running after its {@link #onPause} method is called.
*
* Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. Note: do not count on this method being called as a place for
* saving data! For example, if an activity is editing data in a content
* provider, those edits should be committed in either {@link #onPause} or
* {@link #onSaveInstanceState}, not here. This method is usually implemented to
* free resources like threads that are associated with an activity, so
* that a destroyed activity does not leave such things around while the
* rest of its application is still running. There are situations where
* the system will simply kill the activity's hosting process without
* calling this method (or any others) in it, so it should not be used to
* do things that are intended to remain around after the process goes
* away.
*
* Derived classes must call through to the super class's
* implementation of this method. If they do not, an exception will be
* thrown. At the time that this function has been called, your Resources
* object will have been updated to return resource values matching the
* new configuration.
*
* @param newConfig The new device configuration.
*/
public void onConfigurationChanged(Configuration newConfig) {
if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig);
mCalled = true;
mFragments.dispatchConfigurationChanged(newConfig);
if (mWindow != null) {
// Pass the configuration changed event to the window
mWindow.onConfigurationChanged(newConfig);
}
if (mActionBar != null) {
// Do this last; the action bar will need to access
// view changes from above.
mActionBar.onConfigurationChanged(newConfig);
}
}
/**
* If this activity is being destroyed because it can not handle a
* configuration parameter being changed (and thus its
* {@link #onConfigurationChanged(Configuration)} method is
* not being called), then you can use this method to discover
* the set of changes that have occurred while in the process of being
* destroyed. Note that there is no guarantee that these will be
* accurate (other changes could have happened at any time), so you should
* only use this as an optimization hint.
*
* @return Returns a bit field of the configuration parameters that are
* changing, as defined by the {@link android.content.res.Configuration}
* class.
*/
public int getChangingConfigurations() {
return mConfigChangeFlags;
}
/**
* Retrieve the non-configuration instance data that was previously
* returned by {@link #onRetainNonConfigurationInstance()}. This will
* be available from the initial {@link #onCreate} and
* {@link #onStart} calls to the new instance, allowing you to extract
* any useful dynamic state from the previous instance.
*
* Note that the data you retrieve here should only be used
* as an optimization for handling configuration changes. You should always
* be able to handle getting a null pointer back, and an activity must
* still be able to restore itself to its previous state (through the
* normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this
* function returns null.
*
* @return Returns the object previously returned by
* {@link #onRetainNonConfigurationInstance()}.
*
* @deprecated Use the new {@link Fragment} API
* {@link Fragment#setRetainInstance(boolean)} instead; this is also
* available on older platforms through the Android compatibility package.
*/
@Nullable
@Deprecated
public Object getLastNonConfigurationInstance() {
return mLastNonConfigurationInstances != null
? mLastNonConfigurationInstances.activity : null;
}
/**
* Called by the system, as part of destroying an
* activity due to a configuration change, when it is known that a new
* instance will immediately be created for the new configuration. You
* can return any object you like here, including the activity instance
* itself, which can later be retrieved by calling
* {@link #getLastNonConfigurationInstance()} in the new activity
* instance.
*
* If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB}
* or later, consider instead using a {@link Fragment} with
* {@link Fragment#setRetainInstance(boolean)
* Fragment.setRetainInstance(boolean}.
*
* This function is called purely as an optimization, and you must
* not rely on it being called. When it is called, a number of guarantees
* will be made to help optimize configuration switching:
* These guarantees are designed so that an activity can use this API
* to propagate extensive state from the old to new activity instance, from
* loaded bitmaps, to network connections, to evenly actively running
* threads. Note that you should not propagate any data that
* may change based on the configuration, including any data loaded from
* resources such as strings, layouts, or drawables.
*
* The guarantee of no message handling during the switch to the next
* activity simplifies use with active objects. For example if your retained
* state is an {@link android.os.AsyncTask} you are guaranteed that its
* call back functions (like {@link android.os.AsyncTask#onPostExecute}) will
* not be called from the call here until you execute the next instance's
* {@link #onCreate(Bundle)}. (Note however that there is of course no such
* guarantee for {@link android.os.AsyncTask#doInBackground} since that is
* running in a separate thread.)
*
* @return Return any Object holding the desired state to propagate to the
* next activity instance.
*
* @deprecated Use the new {@link Fragment} API
* {@link Fragment#setRetainInstance(boolean)} instead; this is also
* available on older platforms through the Android compatibility package.
*/
public Object onRetainNonConfigurationInstance() {
return null;
}
/**
* Retrieve the non-configuration instance data that was previously
* returned by {@link #onRetainNonConfigurationChildInstances()}. This will
* be available from the initial {@link #onCreate} and
* {@link #onStart} calls to the new instance, allowing you to extract
* any useful dynamic state from the previous instance.
*
* Note that the data you retrieve here should only be used
* as an optimization for handling configuration changes. You should always
* be able to handle getting a null pointer back, and an activity must
* still be able to restore itself to its previous state (through the
* normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this
* function returns null.
*
* @return Returns the object previously returned by
* {@link #onRetainNonConfigurationChildInstances()}
*/
@Nullable
HashMap This method will return null if the current content is not represented by a Scene. That is, the user does not need to hold down the menu key to execute menu shortcuts.
*
* @see #setDefaultKeyMode
*/
static public final int DEFAULT_KEYS_SHORTCUT = 2;
/**
* Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes
* will start an application-defined search. (If the application or activity does not
* actually define a search, the the keys will be ignored.)
*
* See {@link android.app.SearchManager android.app.SearchManager} for more details.
*
* @see #setDefaultKeyMode
*/
static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3;
/**
* Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes
* will start a global search (typically web search, but some platforms may define alternate
* methods for global search)
*
* See {@link android.app.SearchManager android.app.SearchManager} for more details.
*
* @see #setDefaultKeyMode
*/
static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4;
/**
* Select the default key handling for this activity. This controls what
* will happen to key events that are not otherwise handled. The default
* mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the
* floor. Other modes allow you to launch the dialer
* ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options
* menu without requiring the menu key be held down
* ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL}
* and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}).
*
* Note that the mode selected here does not impact the default
* handling of system keys, such as the "back" and "menu" keys, and your
* activity and its views always get a first chance to receive and handle
* all application keys.
*
* @param mode The desired default key mode constant.
*
* @see #DEFAULT_KEYS_DISABLE
* @see #DEFAULT_KEYS_DIALER
* @see #DEFAULT_KEYS_SHORTCUT
* @see #DEFAULT_KEYS_SEARCH_LOCAL
* @see #DEFAULT_KEYS_SEARCH_GLOBAL
* @see #onKeyDown
*/
public final void setDefaultKeyMode(@DefaultKeyMode int mode) {
mDefaultKeyMode = mode;
// Some modes use a SpannableStringBuilder to track & dispatch input events
// This list must remain in sync with the switch in onKeyDown()
switch (mode) {
case DEFAULT_KEYS_DISABLE:
case DEFAULT_KEYS_SHORTCUT:
mDefaultKeySsb = null; // not used in these modes
break;
case DEFAULT_KEYS_DIALER:
case DEFAULT_KEYS_SEARCH_LOCAL:
case DEFAULT_KEYS_SEARCH_GLOBAL:
mDefaultKeySsb = new SpannableStringBuilder();
Selection.setSelection(mDefaultKeySsb,0);
break;
default:
throw new IllegalArgumentException();
}
}
/**
* Called when a key was pressed down and not handled by any of the views
* inside of the activity. So, for example, key presses while the cursor
* is inside a TextView will not trigger the event (unless it is a navigation
* to another object) because TextView handles its own key presses.
*
* If the focused view didn't want this event, this method is called.
*
* The default implementation takes care of {@link KeyEvent#KEYCODE_BACK}
* by calling {@link #onBackPressed()}, though the behavior varies based
* on the application compatibility mode: for
* {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications,
* it will set up the dispatch to call {@link #onKeyUp} where the action
* will be performed; for earlier applications, it will perform the
* action immediately in on-down, as those versions of the platform
* behaved.
*
* Other additional default key handling may be performed
* if configured with {@link #setDefaultKeyMode}.
*
* @return Return The default implementation handles KEYCODE_BACK to stop the activity
* and go back.
*
* @return Return
* Generic motion events describe joystick movements, mouse hovers, track pad
* touches, scroll wheel movements and other input events. The
* {@link MotionEvent#getSource() source} of the motion event specifies
* the class of input that was received. Implementations of this method
* must examine the bits in the source before processing the event.
* The following code example shows how this is done.
*
* Generic motion events with source class
* {@link android.view.InputDevice#SOURCE_CLASS_POINTER}
* are delivered to the view under the pointer. All other generic motion events are
* delivered to the focused view.
*
* See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to
* handle this event.
* All calls to your activity's {@link #onUserLeaveHint} callback will
* be accompanied by calls to {@link #onUserInteraction}. This
* ensures that your activity will be told of relevant user activity such
* as pulling down the notification pane and touching an item there.
*
* Note that this callback will be invoked for the touch down action
* that begins a touch gesture, but may not be invoked for the touch-moved
* and touch-up actions that follow.
*
* @see #onUserLeaveHint()
*/
public void onUserInteraction() {
}
public void onWindowAttributesChanged(WindowManager.LayoutParams params) {
// Update window manager if: we have a view, that view is
// attached to its parent (which will be a RootView), and
// this activity is not embedded.
if (mParent == null) {
View decor = mDecor;
if (decor != null && decor.getParent() != null) {
getWindowManager().updateViewLayout(decor, params);
}
}
}
public void onContentChanged() {
}
/**
* Called when the current {@link Window} of the activity gains or loses
* focus. This is the best indicator of whether this activity is visible
* to the user. The default implementation clears the key tracking
* state, so should always be called.
*
* Note that this provides information about global focus state, which
* is managed independently of activity lifecycles. As such, while focus
* changes will generally have some relation to lifecycle changes (an
* activity that is stopped will not generally get window focus), you
* should not rely on any particular order between the callbacks here and
* those in the other lifecycle methods such as {@link #onResume}.
*
* As a general rule, however, a resumed activity will have window
* focus... unless it has displayed other dialogs or popups that take
* input focus, in which case the activity itself will not have focus
* when the other windows have it. Likewise, the system may display
* system-level windows (such as the status bar notification panel or
* a system alert) which will temporarily take window input focus without
* pausing the foreground activity.
*
* @param hasFocus Whether the window of this activity has focus.
*
* @see #hasWindowFocus()
* @see #onResume
* @see View#onWindowFocusChanged(boolean)
*/
public void onWindowFocusChanged(boolean hasFocus) {
}
/**
* Called when the main window associated with the activity has been
* attached to the window manager.
* See {@link View#onAttachedToWindow() View.onAttachedToWindow()}
* for more information.
* @see View#onAttachedToWindow
*/
public void onAttachedToWindow() {
}
/**
* Called when the main window associated with the activity has been
* detached from the window manager.
* See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()}
* for more information.
* @see View#onDetachedFromWindow
*/
public void onDetachedFromWindow() {
}
/**
* Returns true if this activity's main window currently has window focus.
* Note that this is not the same as the view itself having focus.
*
* @return True if this activity's main window currently has window focus.
*
* @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams)
*/
public boolean hasWindowFocus() {
Window w = getWindow();
if (w != null) {
View d = w.getDecorView();
if (d != null) {
return d.hasWindowFocus();
}
}
return false;
}
/**
* Called when the main window associated with the activity has been dismissed.
* @hide
*/
@Override
public void onWindowDismissed() {
finish();
}
/**
* Called to process key events. You can override this to intercept all
* key events before they are dispatched to the window. Be sure to call
* this implementation for key events that should be handled normally.
*
* @param event The key event.
*
* @return boolean Return true if this event was consumed.
*/
public boolean dispatchKeyEvent(KeyEvent event) {
onUserInteraction();
Window win = getWindow();
if (win.superDispatchKeyEvent(event)) {
return true;
}
View decor = mDecor;
if (decor == null) decor = win.getDecorView();
return event.dispatch(this, decor != null
? decor.getKeyDispatcherState() : null, this);
}
/**
* Called to process a key shortcut event.
* You can override this to intercept all key shortcut events before they are
* dispatched to the window. Be sure to call this implementation for key shortcut
* events that should be handled normally.
*
* @param event The key shortcut event.
* @return True if this event was consumed.
*/
public boolean dispatchKeyShortcutEvent(KeyEvent event) {
onUserInteraction();
if (getWindow().superDispatchKeyShortcutEvent(event)) {
return true;
}
return onKeyShortcut(event.getKeyCode(), event);
}
/**
* Called to process touch screen events. You can override this to
* intercept all touch screen events before they are dispatched to the
* window. Be sure to call this implementation for touch screen events
* that should be handled normally.
*
* @param ev The touch screen event.
*
* @return boolean Return true if this event was consumed.
*/
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
onUserInteraction();
}
if (getWindow().superDispatchTouchEvent(ev)) {
return true;
}
return onTouchEvent(ev);
}
/**
* Called to process trackball events. You can override this to
* intercept all trackball events before they are dispatched to the
* window. Be sure to call this implementation for trackball events
* that should be handled normally.
*
* @param ev The trackball event.
*
* @return boolean Return true if this event was consumed.
*/
public boolean dispatchTrackballEvent(MotionEvent ev) {
onUserInteraction();
if (getWindow().superDispatchTrackballEvent(ev)) {
return true;
}
return onTrackballEvent(ev);
}
/**
* Called to process generic motion events. You can override this to
* intercept all generic motion events before they are dispatched to the
* window. Be sure to call this implementation for generic motion events
* that should be handled normally.
*
* @param ev The generic motion event.
*
* @return boolean Return true if this event was consumed.
*/
public boolean dispatchGenericMotionEvent(MotionEvent ev) {
onUserInteraction();
if (getWindow().superDispatchGenericMotionEvent(ev)) {
return true;
}
return onGenericMotionEvent(ev);
}
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
event.setClassName(getClass().getName());
event.setPackageName(getPackageName());
LayoutParams params = getWindow().getAttributes();
boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) &&
(params.height == LayoutParams.MATCH_PARENT);
event.setFullScreen(isFullScreen);
CharSequence title = getTitle();
if (!TextUtils.isEmpty(title)) {
event.getText().add(title);
}
return true;
}
/**
* Default implementation of
* {@link android.view.Window.Callback#onCreatePanelView}
* for activities. This
* simply returns null so that all panel sub-windows will have the default
* menu behavior.
*/
@Nullable
public View onCreatePanelView(int featureId) {
return null;
}
/**
* Default implementation of
* {@link android.view.Window.Callback#onCreatePanelMenu}
* for activities. This calls through to the new
* {@link #onCreateOptionsMenu} method for the
* {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel,
* so that subclasses of Activity don't need to deal with feature codes.
*/
public boolean onCreatePanelMenu(int featureId, Menu menu) {
if (featureId == Window.FEATURE_OPTIONS_PANEL) {
boolean show = onCreateOptionsMenu(menu);
show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater());
return show;
}
return false;
}
/**
* Default implementation of
* {@link android.view.Window.Callback#onPreparePanel}
* for activities. This
* calls through to the new {@link #onPrepareOptionsMenu} method for the
* {@link android.view.Window#FEATURE_OPTIONS_PANEL}
* panel, so that subclasses of
* Activity don't need to deal with feature codes.
*/
public boolean onPreparePanel(int featureId, View view, Menu menu) {
if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) {
boolean goforit = onPrepareOptionsMenu(menu);
goforit |= mFragments.dispatchPrepareOptionsMenu(menu);
return goforit;
}
return true;
}
/**
* {@inheritDoc}
*
* @return The default implementation returns true.
*/
public boolean onMenuOpened(int featureId, Menu menu) {
if (featureId == Window.FEATURE_ACTION_BAR) {
initWindowDecorActionBar();
if (mActionBar != null) {
mActionBar.dispatchMenuVisibilityChanged(true);
} else {
Log.e(TAG, "Tried to open action bar menu with no action bar");
}
}
return true;
}
/**
* Default implementation of
* {@link android.view.Window.Callback#onMenuItemSelected}
* for activities. This calls through to the new
* {@link #onOptionsItemSelected} method for the
* {@link android.view.Window#FEATURE_OPTIONS_PANEL}
* panel, so that subclasses of
* Activity don't need to deal with feature codes.
*/
public boolean onMenuItemSelected(int featureId, MenuItem item) {
CharSequence titleCondensed = item.getTitleCondensed();
switch (featureId) {
case Window.FEATURE_OPTIONS_PANEL:
// Put event logging here so it gets called even if subclass
// doesn't call through to superclass's implmeentation of each
// of these methods below
if(titleCondensed != null) {
EventLog.writeEvent(50000, 0, titleCondensed.toString());
}
if (onOptionsItemSelected(item)) {
return true;
}
if (mFragments.dispatchOptionsItemSelected(item)) {
return true;
}
if (item.getItemId() == android.R.id.home && mActionBar != null &&
(mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) {
if (mParent == null) {
return onNavigateUp();
} else {
return mParent.onNavigateUpFromChild(this);
}
}
return false;
case Window.FEATURE_CONTEXT_MENU:
if(titleCondensed != null) {
EventLog.writeEvent(50000, 1, titleCondensed.toString());
}
if (onContextItemSelected(item)) {
return true;
}
return mFragments.dispatchContextItemSelected(item);
default:
return false;
}
}
/**
* Default implementation of
* {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for
* activities. This calls through to {@link #onOptionsMenuClosed(Menu)}
* method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel,
* so that subclasses of Activity don't need to deal with feature codes.
* For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the
* {@link #onContextMenuClosed(Menu)} will be called.
*/
public void onPanelClosed(int featureId, Menu menu) {
switch (featureId) {
case Window.FEATURE_OPTIONS_PANEL:
mFragments.dispatchOptionsMenuClosed(menu);
onOptionsMenuClosed(menu);
break;
case Window.FEATURE_CONTEXT_MENU:
onContextMenuClosed(menu);
break;
case Window.FEATURE_ACTION_BAR:
initWindowDecorActionBar();
mActionBar.dispatchMenuVisibilityChanged(false);
break;
}
}
/**
* Declare that the options menu has changed, so should be recreated.
* The {@link #onCreateOptionsMenu(Menu)} method will be called the next
* time it needs to be displayed.
*/
public void invalidateOptionsMenu() {
mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL);
}
/**
* Initialize the contents of the Activity's standard options menu. You
* should place your menu items in to menu.
*
* This is only called once, the first time the options menu is
* displayed. To update the menu every time it is displayed, see
* {@link #onPrepareOptionsMenu}.
*
* The default implementation populates the menu with standard system
* menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that
* they will be correctly ordered with application-defined menu items.
* Deriving classes should always call through to the base implementation.
*
* You can safely hold on to menu (and any items created
* from it), making modifications to it as desired, until the next
* time onCreateOptionsMenu() is called.
*
* When you add items to the menu, you can implement the Activity's
* {@link #onOptionsItemSelected} method to handle them there.
*
* @param menu The options menu in which you place your items.
*
* @return You must return true for the menu to be displayed;
* if you return false it will not be shown.
*
* @see #onPrepareOptionsMenu
* @see #onOptionsItemSelected
*/
public boolean onCreateOptionsMenu(Menu menu) {
if (mParent != null) {
return mParent.onCreateOptionsMenu(menu);
}
return true;
}
/**
* Prepare the Screen's standard options menu to be displayed. This is
* called right before the menu is shown, every time it is shown. You can
* use this method to efficiently enable/disable items or otherwise
* dynamically modify the contents.
*
* The default implementation updates the system menu items based on the
* activity's state. Deriving classes should always call through to the
* base class implementation.
*
* @param menu The options menu as last shown or first initialized by
* onCreateOptionsMenu().
*
* @return You must return true for the menu to be displayed;
* if you return false it will not be shown.
*
* @see #onCreateOptionsMenu
*/
public boolean onPrepareOptionsMenu(Menu menu) {
if (mParent != null) {
return mParent.onPrepareOptionsMenu(menu);
}
return true;
}
/**
* This hook is called whenever an item in your options menu is selected.
* The default implementation simply returns false to have the normal
* processing happen (calling the item's Runnable or sending a message to
* its Handler as appropriate). You can use this method for any items
* for which you would like to do processing without those other
* facilities.
*
* Derived classes should call through to the base class for it to
* perform the default menu handling. If the attribute {@link android.R.attr#parentActivityName parentActivityName}
* was specified in the manifest for this activity or an activity-alias to it,
* default Up navigation will be handled automatically. If any activity
* along the parent chain requires extra Intent arguments, the Activity subclass
* should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}
* to supply those arguments. See Tasks and Back Stack
* from the developer guide and Navigation
* from the design guide for more information about navigating within your app. See the {@link TaskStackBuilder} class and the Activity methods
* {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and
* {@link #navigateUpTo(Intent)} for help implementing custom Up navigation.
* The AppNavigation sample application in the Android SDK is also available for reference. The default implementation of this method adds the parent chain of this activity
* as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications
* may choose to override this method to construct the desired task stack in a different
* way. This method will be invoked by the default implementation of {@link #onNavigateUp()}
* if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent
* returned by {@link #getParentActivityIntent()}. Applications that wish to supply extra Intent parameters to the parent stack defined
* by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}. This method receives the {@link TaskStackBuilder} with the constructed series of
* Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}.
* If any extra data should be added to these intents before launching the new task,
* the application should override this method and add that data here.
* Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an
* item has been selected.
*
* It is not safe to hold onto the context menu after this method returns.
*
*/
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
}
/**
* Registers a context menu to be shown for the given view (multiple views
* can show the context menu). This method will set the
* {@link OnCreateContextMenuListener} on the view to this activity, so
* {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be
* called when it is time to show the context menu.
*
* @see #unregisterForContextMenu(View)
* @param view The view that should show a context menu.
*/
public void registerForContextMenu(View view) {
view.setOnCreateContextMenuListener(this);
}
/**
* Prevents a context menu to be shown for the given view. This method will remove the
* {@link OnCreateContextMenuListener} on the view.
*
* @see #registerForContextMenu(View)
* @param view The view that should stop showing a context menu.
*/
public void unregisterForContextMenu(View view) {
view.setOnCreateContextMenuListener(null);
}
/**
* Programmatically opens the context menu for a particular {@code view}.
* The {@code view} should have been added via
* {@link #registerForContextMenu(View)}.
*
* @param view The view to show the context menu for.
*/
public void openContextMenu(View view) {
view.showContextMenu();
}
/**
* Programmatically closes the most recently opened context menu, if showing.
*/
public void closeContextMenu() {
mWindow.closePanel(Window.FEATURE_CONTEXT_MENU);
}
/**
* This hook is called whenever an item in a context menu is selected. The
* default implementation simply returns false to have the normal processing
* happen (calling the item's Runnable or sending a message to its Handler
* as appropriate). You can use this method for any items for which you
* would like to do processing without those other facilities.
*
* Use {@link MenuItem#getMenuInfo()} to get extra information set by the
* View that added this menu item.
*
* Derived classes should call through to the base class for it to perform
* the default menu handling.
*
* @param item The context menu item that was selected.
* @return boolean Return false to allow normal context menu processing to
* proceed, true to consume it here.
*/
public boolean onContextItemSelected(MenuItem item) {
if (mParent != null) {
return mParent.onContextItemSelected(item);
}
return false;
}
/**
* This hook is called whenever the context menu is being closed (either by
* the user canceling the menu with the back/menu button, or when an item is
* selected).
*
* @param menu The context menu that is being closed.
*/
public void onContextMenuClosed(Menu menu) {
if (mParent != null) {
mParent.onContextMenuClosed(menu);
}
}
/**
* @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}.
*/
@Deprecated
protected Dialog onCreateDialog(int id) {
return null;
}
/**
* Callback for creating dialogs that are managed (saved and restored) for you
* by the activity. The default implementation calls through to
* {@link #onCreateDialog(int)} for compatibility.
*
* If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB}
* or later, consider instead using a {@link DialogFragment} instead.
*
* If you use {@link #showDialog(int)}, the activity will call through to
* this method the first time, and hang onto it thereafter. Any dialog
* that is created by this method will automatically be saved and restored
* for you, including whether it is showing.
*
* If you would like the activity to manage saving and restoring dialogs
* for you, you should override this method and handle any ids that are
* passed to {@link #showDialog}.
*
* If you would like an opportunity to prepare your dialog before it is shown,
* override {@link #onPrepareDialog(int, Dialog, Bundle)}.
*
* @param id The id of the dialog.
* @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}.
* @return The dialog. If you return null, the dialog will not be created.
*
* @see #onPrepareDialog(int, Dialog, Bundle)
* @see #showDialog(int, Bundle)
* @see #dismissDialog(int)
* @see #removeDialog(int)
*
* @deprecated Use the new {@link DialogFragment} class with
* {@link FragmentManager} instead; this is also
* available on older platforms through the Android compatibility package.
*/
@Nullable
@Deprecated
protected Dialog onCreateDialog(int id, Bundle args) {
return onCreateDialog(id);
}
/**
* @deprecated Old no-arguments version of
* {@link #onPrepareDialog(int, Dialog, Bundle)}.
*/
@Deprecated
protected void onPrepareDialog(int id, Dialog dialog) {
dialog.setOwnerActivity(this);
}
/**
* Provides an opportunity to prepare a managed dialog before it is being
* shown. The default implementation calls through to
* {@link #onPrepareDialog(int, Dialog)} for compatibility.
*
*
* Override this if you need to update a managed dialog based on the state
* of the application each time it is shown. For example, a time picker
* dialog might want to be updated with the current time. You should call
* through to the superclass's implementation. The default implementation
* will set this Activity as the owner activity on the Dialog.
*
* @param id The id of the managed dialog.
* @param dialog The dialog.
* @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}.
* @see #onCreateDialog(int, Bundle)
* @see #showDialog(int)
* @see #dismissDialog(int)
* @see #removeDialog(int)
*
* @deprecated Use the new {@link DialogFragment} class with
* {@link FragmentManager} instead; this is also
* available on older platforms through the Android compatibility package.
*/
@Deprecated
protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
onPrepareDialog(id, dialog);
}
/**
* Simple version of {@link #showDialog(int, Bundle)} that does not
* take any arguments. Simply calls {@link #showDialog(int, Bundle)}
* with null arguments.
*
* @deprecated Use the new {@link DialogFragment} class with
* {@link FragmentManager} instead; this is also
* available on older platforms through the Android compatibility package.
*/
@Deprecated
public final void showDialog(int id) {
showDialog(id, null);
}
/**
* Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)}
* will be made with the same id the first time this is called for a given
* id. From thereafter, the dialog will be automatically saved and restored.
*
* If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB}
* or later, consider instead using a {@link DialogFragment} instead.
*
* Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will
* be made to provide an opportunity to do any timely preparation.
*
* @param id The id of the managed dialog.
* @param args Arguments to pass through to the dialog. These will be saved
* and restored for you. Note that if the dialog is already created,
* {@link #onCreateDialog(int, Bundle)} will not be called with the new
* arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be.
* If you need to rebuild the dialog, call {@link #removeDialog(int)} first.
* @return Returns true if the Dialog was created; false is returned if
* it is not created because {@link #onCreateDialog(int, Bundle)} returns false.
*
* @see Dialog
* @see #onCreateDialog(int, Bundle)
* @see #onPrepareDialog(int, Dialog, Bundle)
* @see #dismissDialog(int)
* @see #removeDialog(int)
*
* @deprecated Use the new {@link DialogFragment} class with
* {@link FragmentManager} instead; this is also
* available on older platforms through the Android compatibility package.
*/
@Nullable
@Deprecated
public final boolean showDialog(int id, Bundle args) {
if (mManagedDialogs == null) {
mManagedDialogs = new SparseArray This can be useful if you know that you will never show a dialog again and
* want to avoid the overhead of saving and restoring it in the future.
*
* As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function
* will not throw an exception if you try to remove an ID that does not
* currently have an associated dialog. You can use this function as a simple way to launch the search UI, in response to a
* menu item, search button, or other widgets within your activity. Unless overidden,
* calling this function is the same as calling
* {@link #startSearch startSearch(null, false, null, false)}, which launches
* search for the current activity as specified in its manifest, see {@link SearchManager}.
*
* You can override this function to force global search, e.g. in response to a dedicated
* search key, or to block search entirely (by simply returning false).
*
* @return Returns {@code true} if search launched, and {@code false} if activity blocks it.
* The default implementation always returns {@code true}.
*
* @see android.app.SearchManager
*/
public boolean onSearchRequested() {
startSearch(null, false, null, false);
return true;
}
/**
* This hook is called to launch the search UI.
*
* It is typically called from onSearchRequested(), either directly from
* Activity.onSearchRequested() or from an overridden version in any given
* Activity. If your goal is simply to activate search, it is preferred to call
* onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal
* is to inject specific data such as context data, it is preferred to override
* onSearchRequested(), so that any callers to it will benefit from the override.
*
* @param initialQuery Any non-null non-empty string will be inserted as
* pre-entered text in the search query box.
* @param selectInitialQuery If true, the initial query will be preselected, which means that
* any further typing will replace it. This is useful for cases where an entire pre-formed
* query is being inserted. If false, the selection point will be placed at the end of the
* inserted query. This is useful when the inserted query is text that the user entered,
* and the user would expect to be able to keep typing. This parameter is only meaningful
* if initialQuery is a non-empty string.
* @param appSearchData An application can insert application-specific
* context here, in order to improve quality or specificity of its own
* searches. This data will be returned with SEARCH intent(s). Null if
* no extra data is required.
* @param globalSearch If false, this will only launch the search that has been specifically
* defined by the application (which is usually defined as a local search). If no default
* search is defined in the current application or activity, global search will be launched.
* If true, this will always launch a platform-global (e.g. web-based) search instead.
*
* @see android.app.SearchManager
* @see #onSearchRequested
*/
public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery,
@Nullable Bundle appSearchData, boolean globalSearch) {
ensureSearchManager();
mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(),
appSearchData, globalSearch);
}
/**
* Similar to {@link #startSearch}, but actually fires off the search query after invoking
* the search dialog. Made available for testing purposes.
*
* @param query The query to trigger. If empty, the request will be ignored.
* @param appSearchData An application can insert application-specific
* context here, in order to improve quality or specificity of its own
* searches. This data will be returned with SEARCH intent(s). Null if
* no extra data is required.
*/
public void triggerSearch(String query, @Nullable Bundle appSearchData) {
ensureSearchManager();
mSearchManager.triggerSearch(query, getComponentName(), appSearchData);
}
/**
* Request that key events come to this activity. Use this if your
* activity has no views with focus, but the activity still wants
* a chance to process key events.
*
* @see android.view.Window#takeKeyEvents
*/
public void takeKeyEvents(boolean get) {
getWindow().takeKeyEvents(get);
}
/**
* Enable extended window features. This is a convenience for calling
* {@link android.view.Window#requestFeature getWindow().requestFeature()}.
*
* @param featureId The desired feature as defined in
* {@link android.view.Window}.
* @return Returns true if the requested feature is supported and now
* enabled.
*
* @see android.view.Window#requestFeature
*/
public final boolean requestWindowFeature(int featureId) {
return getWindow().requestFeature(featureId);
}
/**
* Convenience for calling
* {@link android.view.Window#setFeatureDrawableResource}.
*/
public final void setFeatureDrawableResource(int featureId, int resId) {
getWindow().setFeatureDrawableResource(featureId, resId);
}
/**
* Convenience for calling
* {@link android.view.Window#setFeatureDrawableUri}.
*/
public final void setFeatureDrawableUri(int featureId, Uri uri) {
getWindow().setFeatureDrawableUri(featureId, uri);
}
/**
* Convenience for calling
* {@link android.view.Window#setFeatureDrawable(int, Drawable)}.
*/
public final void setFeatureDrawable(int featureId, Drawable drawable) {
getWindow().setFeatureDrawable(featureId, drawable);
}
/**
* Convenience for calling
* {@link android.view.Window#setFeatureDrawableAlpha}.
*/
public final void setFeatureDrawableAlpha(int featureId, int alpha) {
getWindow().setFeatureDrawableAlpha(featureId, alpha);
}
/**
* Convenience for calling
* {@link android.view.Window#getLayoutInflater}.
*/
@NonNull
public LayoutInflater getLayoutInflater() {
return getWindow().getLayoutInflater();
}
/**
* Returns a {@link MenuInflater} with this context.
*/
@NonNull
public MenuInflater getMenuInflater() {
// Make sure that action views can get an appropriate theme.
if (mMenuInflater == null) {
initWindowDecorActionBar();
if (mActionBar != null) {
mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this);
} else {
mMenuInflater = new MenuInflater(this);
}
}
return mMenuInflater;
}
@Override
protected void onApplyThemeResource(Resources.Theme theme, int resid,
boolean first) {
if (mParent == null) {
super.onApplyThemeResource(theme, resid, first);
} else {
try {
theme.setTo(mParent.getTheme());
} catch (Exception e) {
// Empty
}
theme.applyStyle(resid, false);
}
// Get the primary color and update the RecentsActivityValues for this activity
if (theme != null) {
TypedArray a = theme.obtainStyledAttributes(com.android.internal.R.styleable.Theme);
int colorPrimary = a.getColor(com.android.internal.R.styleable.Theme_colorPrimary, 0);
a.recycle();
if (colorPrimary != 0) {
ActivityManager.RecentsActivityValues v = new ActivityManager.RecentsActivityValues();
v.colorPrimary = colorPrimary;
setRecentsActivityValues(v);
}
}
}
/**
* Same as calling {@link #startActivityForResult(Intent, int, Bundle)}
* with no options.
*
* @param intent The intent to start.
* @param requestCode If >= 0, this code will be returned in
* onActivityResult() when the activity exits.
*
* @throws android.content.ActivityNotFoundException
*
* @see #startActivity
*/
public void startActivityForResult(Intent intent, int requestCode) {
Bundle options = null;
if (mWindow.hasFeature(Window.FEATURE_CONTENT_TRANSITIONS)) {
options = ActivityOptions.makeSceneTransitionAnimation(mWindow, null).toBundle();
}
startActivityForResult(intent, requestCode, options);
}
/**
* Launch an activity for which you would like a result when it finished.
* When this activity exits, your
* onActivityResult() method will be called with the given requestCode.
* Using a negative requestCode is the same as calling
* {@link #startActivity} (the activity is not launched as a sub-activity).
*
* Note that this method should only be used with Intent protocols
* that are defined to return a result. In other protocols (such as
* {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may
* not get the result when you expect. For example, if the activity you
* are launching uses the singleTask launch mode, it will not run in your
* task and thus you will immediately receive a cancel result.
*
* As a special case, if you call startActivityForResult() with a requestCode
* >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your
* activity, then your window will not be displayed until a result is
* returned back from the started activity. This is to avoid visible
* flickering when redirecting to another activity.
*
* This method throws {@link android.content.ActivityNotFoundException}
* if there was no Activity found to run the given Intent.
*
* @param intent The intent to start.
* @param requestCode If >= 0, this code will be returned in
* onActivityResult() when the activity exits.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @throws android.content.ActivityNotFoundException
*
* @see #startActivity
*/
public void startActivityForResult(Intent intent, int requestCode, @Nullable Bundle options) {
if (options != null) {
ActivityOptions activityOptions = new ActivityOptions(options);
activityOptions.dispatchStartExit();
mCalledActivityOptions = activityOptions;
}
if (mParent == null) {
Instrumentation.ActivityResult ar =
mInstrumentation.execStartActivity(
this, mMainThread.getApplicationThread(), mToken, this,
intent, requestCode, options);
if (ar != null) {
mMainThread.sendActivityResult(
mToken, mEmbeddedID, requestCode, ar.getResultCode(),
ar.getResultData());
}
if (requestCode >= 0) {
// If this start is requesting a result, we can avoid making
// the activity visible until the result is received. Setting
// this code during onCreate(Bundle savedInstanceState) or onResume() will keep the
// activity hidden during this time, to avoid flickering.
// This can only be done when a result is requested because
// that guarantees we will get information back when the
// activity is finished, no matter what happens to it.
mStartedActivity = true;
}
final View decor = mWindow != null ? mWindow.peekDecorView() : null;
if (decor != null) {
decor.cancelPendingInputEvents();
}
// TODO Consider clearing/flushing other event sources and events for child windows.
} else {
if (options != null) {
mParent.startActivityFromChild(this, intent, requestCode, options);
} else {
// Note we want to go through this method for compatibility with
// existing applications that may have overridden it.
mParent.startActivityFromChild(this, intent, requestCode);
}
}
}
/**
* @hide Implement to provide correct calling token.
*/
public void startActivityAsUser(Intent intent, UserHandle user) {
startActivityAsUser(intent, null, user);
}
/**
* @hide Implement to provide correct calling token.
*/
public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) {
if (mParent != null) {
throw new RuntimeException("Called be called from a child");
}
Instrumentation.ActivityResult ar =
mInstrumentation.execStartActivity(
this, mMainThread.getApplicationThread(), mToken, this,
intent, -1, options, user);
if (ar != null) {
mMainThread.sendActivityResult(
mToken, mEmbeddedID, -1, ar.getResultCode(),
ar.getResultData());
}
}
/**
* Same as calling {@link #startIntentSenderForResult(IntentSender, int,
* Intent, int, int, int, Bundle)} with no options.
*
* @param intent The IntentSender to launch.
* @param requestCode If >= 0, this code will be returned in
* onActivityResult() when the activity exits.
* @param fillInIntent If non-null, this will be provided as the
* intent parameter to {@link IntentSender#sendIntent}.
* @param flagsMask Intent flags in the original IntentSender that you
* would like to change.
* @param flagsValues Desired values for any bits set in
* flagsMask
* @param extraFlags Always set to 0.
*/
public void startIntentSenderForResult(IntentSender intent, int requestCode,
@Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)
throws IntentSender.SendIntentException {
startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask,
flagsValues, extraFlags, null);
}
/**
* Like {@link #startActivityForResult(Intent, int)}, but allowing you
* to use a IntentSender to describe the activity to be started. If
* the IntentSender is for an activity, that activity will be started
* as if you had called the regular {@link #startActivityForResult(Intent, int)}
* here; otherwise, its associated action will be executed (such as
* sending a broadcast) as if you had called
* {@link IntentSender#sendIntent IntentSender.sendIntent} on it.
*
* @param intent The IntentSender to launch.
* @param requestCode If >= 0, this code will be returned in
* onActivityResult() when the activity exits.
* @param fillInIntent If non-null, this will be provided as the
* intent parameter to {@link IntentSender#sendIntent}.
* @param flagsMask Intent flags in the original IntentSender that you
* would like to change.
* @param flagsValues Desired values for any bits set in
* flagsMask
* @param extraFlags Always set to 0.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details. If options
* have also been supplied by the IntentSender, options given here will
* override any that conflict with those given by the IntentSender.
*/
public void startIntentSenderForResult(IntentSender intent, int requestCode,
@Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags,
Bundle options) throws IntentSender.SendIntentException {
if (mParent == null) {
startIntentSenderForResultInner(intent, requestCode, fillInIntent,
flagsMask, flagsValues, this, options);
} else if (options != null) {
mParent.startIntentSenderFromChild(this, intent, requestCode,
fillInIntent, flagsMask, flagsValues, extraFlags, options);
} else {
// Note we want to go through this call for compatibility with
// existing applications that may have overridden the method.
mParent.startIntentSenderFromChild(this, intent, requestCode,
fillInIntent, flagsMask, flagsValues, extraFlags);
}
}
private void startIntentSenderForResultInner(IntentSender intent, int requestCode,
Intent fillInIntent, int flagsMask, int flagsValues, Activity activity,
Bundle options)
throws IntentSender.SendIntentException {
try {
String resolvedType = null;
if (fillInIntent != null) {
fillInIntent.migrateExtraStreamToClipData();
fillInIntent.prepareToLeaveProcess();
resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver());
}
int result = ActivityManagerNative.getDefault()
.startActivityIntentSender(mMainThread.getApplicationThread(), intent,
fillInIntent, resolvedType, mToken, activity.mEmbeddedID,
requestCode, flagsMask, flagsValues, options);
if (result == ActivityManager.START_CANCELED) {
throw new IntentSender.SendIntentException();
}
Instrumentation.checkStartActivityResult(result, null);
} catch (RemoteException e) {
}
if (requestCode >= 0) {
// If this start is requesting a result, we can avoid making
// the activity visible until the result is received. Setting
// this code during onCreate(Bundle savedInstanceState) or onResume() will keep the
// activity hidden during this time, to avoid flickering.
// This can only be done when a result is requested because
// that guarantees we will get information back when the
// activity is finished, no matter what happens to it.
mStartedActivity = true;
}
}
/**
* Same as {@link #startActivity(Intent, Bundle)} with no options
* specified.
*
* @param intent The intent to start.
*
* @throws android.content.ActivityNotFoundException
*
* @see {@link #startActivity(Intent, Bundle)}
* @see #startActivityForResult
*/
@Override
public void startActivity(Intent intent) {
this.startActivity(intent, null);
}
/**
* Launch a new activity. You will not receive any information about when
* the activity exits. This implementation overrides the base version,
* providing information about
* the activity performing the launch. Because of this additional
* information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not
* required; if not specified, the new activity will be added to the
* task of the caller.
*
* This method throws {@link android.content.ActivityNotFoundException}
* if there was no Activity found to run the given Intent.
*
* @param intent The intent to start.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @throws android.content.ActivityNotFoundException
*
* @see {@link #startActivity(Intent)}
* @see #startActivityForResult
*/
@Override
public void startActivity(Intent intent, @Nullable Bundle options) {
if (options != null) {
startActivityForResult(intent, -1, options);
} else {
// Note we want to go through this call for compatibility with
// applications that may have overridden the method.
startActivityForResult(intent, -1);
}
}
/**
* Same as {@link #startActivities(Intent[], Bundle)} with no options
* specified.
*
* @param intents The intents to start.
*
* @throws android.content.ActivityNotFoundException
*
* @see {@link #startActivities(Intent[], Bundle)}
* @see #startActivityForResult
*/
@Override
public void startActivities(Intent[] intents) {
startActivities(intents, null);
}
/**
* Launch a new activity. You will not receive any information about when
* the activity exits. This implementation overrides the base version,
* providing information about
* the activity performing the launch. Because of this additional
* information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not
* required; if not specified, the new activity will be added to the
* task of the caller.
*
* This method throws {@link android.content.ActivityNotFoundException}
* if there was no Activity found to run the given Intent.
*
* @param intents The intents to start.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @throws android.content.ActivityNotFoundException
*
* @see {@link #startActivities(Intent[])}
* @see #startActivityForResult
*/
@Override
public void startActivities(Intent[] intents, @Nullable Bundle options) {
mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(),
mToken, this, intents, options);
}
/**
* Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)}
* with no options.
*
* @param intent The IntentSender to launch.
* @param fillInIntent If non-null, this will be provided as the
* intent parameter to {@link IntentSender#sendIntent}.
* @param flagsMask Intent flags in the original IntentSender that you
* would like to change.
* @param flagsValues Desired values for any bits set in
* flagsMask
* @param extraFlags Always set to 0.
*/
public void startIntentSender(IntentSender intent,
@Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)
throws IntentSender.SendIntentException {
startIntentSender(intent, fillInIntent, flagsMask, flagsValues,
extraFlags, null);
}
/**
* Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender
* to start; see
* {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)}
* for more information.
*
* @param intent The IntentSender to launch.
* @param fillInIntent If non-null, this will be provided as the
* intent parameter to {@link IntentSender#sendIntent}.
* @param flagsMask Intent flags in the original IntentSender that you
* would like to change.
* @param flagsValues Desired values for any bits set in
* flagsMask
* @param extraFlags Always set to 0.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details. If options
* have also been supplied by the IntentSender, options given here will
* override any that conflict with those given by the IntentSender.
*/
public void startIntentSender(IntentSender intent,
@Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags,
Bundle options) throws IntentSender.SendIntentException {
if (options != null) {
startIntentSenderForResult(intent, -1, fillInIntent, flagsMask,
flagsValues, extraFlags, options);
} else {
// Note we want to go through this call for compatibility with
// applications that may have overridden the method.
startIntentSenderForResult(intent, -1, fillInIntent, flagsMask,
flagsValues, extraFlags);
}
}
/**
* Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)}
* with no options.
*
* @param intent The intent to start.
* @param requestCode If >= 0, this code will be returned in
* onActivityResult() when the activity exits, as described in
* {@link #startActivityForResult}.
*
* @return If a new activity was launched then true is returned; otherwise
* false is returned and you must handle the Intent yourself.
*
* @see #startActivity
* @see #startActivityForResult
*/
public boolean startActivityIfNeeded(@NonNull Intent intent, int requestCode) {
return startActivityIfNeeded(intent, requestCode, null);
}
/**
* A special variation to launch an activity only if a new activity
* instance is needed to handle the given Intent. In other words, this is
* just like {@link #startActivityForResult(Intent, int)} except: if you are
* using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or
* singleTask or singleTop
* {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode},
* and the activity
* that handles intent is the same as your currently running
* activity, then a new instance is not needed. In this case, instead of
* the normal behavior of calling {@link #onNewIntent} this function will
* return and you can handle the Intent yourself.
*
* This function can only be called from a top-level activity; if it is
* called from a child activity, a runtime exception will be thrown.
*
* @param intent The intent to start.
* @param requestCode If >= 0, this code will be returned in
* onActivityResult() when the activity exits, as described in
* {@link #startActivityForResult}.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @return If a new activity was launched then true is returned; otherwise
* false is returned and you must handle the Intent yourself.
*
* @see #startActivity
* @see #startActivityForResult
*/
public boolean startActivityIfNeeded(@NonNull Intent intent, int requestCode,
@Nullable Bundle options) {
if (mParent == null) {
int result = ActivityManager.START_RETURN_INTENT_TO_CALLER;
try {
intent.migrateExtraStreamToClipData();
intent.prepareToLeaveProcess();
result = ActivityManagerNative.getDefault()
.startActivity(mMainThread.getApplicationThread(), getBasePackageName(),
intent, intent.resolveTypeIfNeeded(getContentResolver()),
mToken, mEmbeddedID, requestCode,
ActivityManager.START_FLAG_ONLY_IF_NEEDED, null, null,
options);
} catch (RemoteException e) {
// Empty
}
Instrumentation.checkStartActivityResult(result, intent);
if (requestCode >= 0) {
// If this start is requesting a result, we can avoid making
// the activity visible until the result is received. Setting
// this code during onCreate(Bundle savedInstanceState) or onResume() will keep the
// activity hidden during this time, to avoid flickering.
// This can only be done when a result is requested because
// that guarantees we will get information back when the
// activity is finished, no matter what happens to it.
mStartedActivity = true;
}
return result != ActivityManager.START_RETURN_INTENT_TO_CALLER;
}
throw new UnsupportedOperationException(
"startActivityIfNeeded can only be called from a top-level activity");
}
/**
* Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with
* no options.
*
* @param intent The intent to dispatch to the next activity. For
* correct behavior, this must be the same as the Intent that started
* your own activity; the only changes you can make are to the extras
* inside of it.
*
* @return Returns a boolean indicating whether there was another Activity
* to start: true if there was a next activity to start, false if there
* wasn't. In general, if true is returned you will then want to call
* finish() on yourself.
*/
public boolean startNextMatchingActivity(@NonNull Intent intent) {
return startNextMatchingActivity(intent, null);
}
/**
* Special version of starting an activity, for use when you are replacing
* other activity components. You can use this to hand the Intent off
* to the next Activity that can handle it. You typically call this in
* {@link #onCreate} with the Intent returned by {@link #getIntent}.
*
* @param intent The intent to dispatch to the next activity. For
* correct behavior, this must be the same as the Intent that started
* your own activity; the only changes you can make are to the extras
* inside of it.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @return Returns a boolean indicating whether there was another Activity
* to start: true if there was a next activity to start, false if there
* wasn't. In general, if true is returned you will then want to call
* finish() on yourself.
*/
public boolean startNextMatchingActivity(@NonNull Intent intent, @Nullable Bundle options) {
if (mParent == null) {
try {
intent.migrateExtraStreamToClipData();
intent.prepareToLeaveProcess();
return ActivityManagerNative.getDefault()
.startNextMatchingActivity(mToken, intent, options);
} catch (RemoteException e) {
// Empty
}
return false;
}
throw new UnsupportedOperationException(
"startNextMatchingActivity can only be called from a top-level activity");
}
/**
* Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)}
* with no options.
*
* @param child The activity making the call.
* @param intent The intent to start.
* @param requestCode Reply request code. < 0 if reply is not requested.
*
* @throws android.content.ActivityNotFoundException
*
* @see #startActivity
* @see #startActivityForResult
*/
public void startActivityFromChild(@NonNull Activity child, Intent intent,
int requestCode) {
startActivityFromChild(child, intent, requestCode, null);
}
/**
* This is called when a child activity of this one calls its
* {@link #startActivity} or {@link #startActivityForResult} method.
*
* This method throws {@link android.content.ActivityNotFoundException}
* if there was no Activity found to run the given Intent.
*
* @param child The activity making the call.
* @param intent The intent to start.
* @param requestCode Reply request code. < 0 if reply is not requested.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @throws android.content.ActivityNotFoundException
*
* @see #startActivity
* @see #startActivityForResult
*/
public void startActivityFromChild(@NonNull Activity child, Intent intent,
int requestCode, @Nullable Bundle options) {
Instrumentation.ActivityResult ar =
mInstrumentation.execStartActivity(
this, mMainThread.getApplicationThread(), mToken, child,
intent, requestCode, options);
if (ar != null) {
mMainThread.sendActivityResult(
mToken, child.mEmbeddedID, requestCode,
ar.getResultCode(), ar.getResultData());
}
}
/**
* Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)}
* with no options.
*
* @param fragment The fragment making the call.
* @param intent The intent to start.
* @param requestCode Reply request code. < 0 if reply is not requested.
*
* @throws android.content.ActivityNotFoundException
*
* @see Fragment#startActivity
* @see Fragment#startActivityForResult
*/
public void startActivityFromFragment(@NonNull Fragment fragment, Intent intent,
int requestCode) {
startActivityFromFragment(fragment, intent, requestCode, null);
}
/**
* This is called when a Fragment in this activity calls its
* {@link Fragment#startActivity} or {@link Fragment#startActivityForResult}
* method.
*
* This method throws {@link android.content.ActivityNotFoundException}
* if there was no Activity found to run the given Intent.
*
* @param fragment The fragment making the call.
* @param intent The intent to start.
* @param requestCode Reply request code. < 0 if reply is not requested.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*
* @throws android.content.ActivityNotFoundException
*
* @see Fragment#startActivity
* @see Fragment#startActivityForResult
*/
public void startActivityFromFragment(@NonNull Fragment fragment, Intent intent,
int requestCode, @Nullable Bundle options) {
Instrumentation.ActivityResult ar =
mInstrumentation.execStartActivity(
this, mMainThread.getApplicationThread(), mToken, fragment,
intent, requestCode, options);
if (ar != null) {
mMainThread.sendActivityResult(
mToken, fragment.mWho, requestCode,
ar.getResultCode(), ar.getResultData());
}
}
/**
* Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender,
* int, Intent, int, int, int, Bundle)} with no options.
*/
public void startIntentSenderFromChild(Activity child, IntentSender intent,
int requestCode, Intent fillInIntent, int flagsMask, int flagsValues,
int extraFlags)
throws IntentSender.SendIntentException {
startIntentSenderFromChild(child, intent, requestCode, fillInIntent,
flagsMask, flagsValues, extraFlags, null);
}
/**
* Like {@link #startActivityFromChild(Activity, Intent, int)}, but
* taking a IntentSender; see
* {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)}
* for more information.
*/
public void startIntentSenderFromChild(Activity child, IntentSender intent,
int requestCode, Intent fillInIntent, int flagsMask, int flagsValues,
int extraFlags, @Nullable Bundle options)
throws IntentSender.SendIntentException {
startIntentSenderForResultInner(intent, requestCode, fillInIntent,
flagsMask, flagsValues, child, options);
}
/**
* Call immediately after one of the flavors of {@link #startActivity(Intent)}
* or {@link #finish} to specify an explicit transition animation to
* perform next.
*
* As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative
* to using this with starting activities is to supply the desired animation
* information through a {@link ActivityOptions} bundle to
* {@link #startActivity(Intent, Bundle) or a related function. This allows
* you to specify a custom animation even when starting an activity from
* outside the context of the current top activity.
*
* @param enterAnim A resource ID of the animation resource to use for
* the incoming activity. Use 0 for no animation.
* @param exitAnim A resource ID of the animation resource to use for
* the outgoing activity. Use 0 for no animation.
*/
public void overridePendingTransition(int enterAnim, int exitAnim) {
try {
ActivityManagerNative.getDefault().overridePendingTransition(
mToken, getPackageName(), enterAnim, exitAnim);
} catch (RemoteException e) {
}
}
/**
* Call this to set the result that your activity will return to its
* caller.
*
* @param resultCode The result code to propagate back to the originating
* activity, often RESULT_CANCELED or RESULT_OK
*
* @see #RESULT_CANCELED
* @see #RESULT_OK
* @see #RESULT_FIRST_USER
* @see #setResult(int, Intent)
*/
public final void setResult(int resultCode) {
synchronized (this) {
mResultCode = resultCode;
mResultData = null;
}
}
/**
* Call this to set the result that your activity will return to its
* caller.
*
* As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent
* you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION
* Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION
* Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the
* Activity receiving the result access to the specific URIs in the Intent.
* Access will remain until the Activity has finished (it will remain across the hosting
* process being killed and other temporary destruction) and will be added
* to any existing set of URI permissions it already holds.
*
* @param resultCode The result code to propagate back to the originating
* activity, often RESULT_CANCELED or RESULT_OK
* @param data The data to propagate back to the originating activity.
*
* @see #RESULT_CANCELED
* @see #RESULT_OK
* @see #RESULT_FIRST_USER
* @see #setResult(int)
*/
public final void setResult(int resultCode, Intent data) {
synchronized (this) {
mResultCode = resultCode;
mResultData = data;
}
}
/**
* Return the name of the package that invoked this activity. This is who
* the data in {@link #setResult setResult()} will be sent to. You can
* use this information to validate that the recipient is allowed to
* receive the data.
*
* Note: if the calling activity is not expecting a result (that is it
* did not use the {@link #startActivityForResult}
* form that includes a request code), then the calling package will be
* null. Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
* the result from this method was unstable. If the process hosting the calling
* package was no longer running, it would return null instead of the proper package
* name. You can use {@link #getCallingActivity()} and retrieve the package name
* from that instead. Note: if the calling activity is not expecting a result (that is it
* did not use the {@link #startActivityForResult}
* form that includes a request code), then the calling package will be
* null.
*
* @return The ComponentName of the activity that will receive your
* reply, or null if none.
*/
@Nullable
public ComponentName getCallingActivity() {
try {
return ActivityManagerNative.getDefault().getCallingActivity(mToken);
} catch (RemoteException e) {
return null;
}
}
/**
* Control whether this activity's main window is visible. This is intended
* only for the special case of an activity that is not going to show a
* UI itself, but can't just finish prior to onResume() because it needs
* to wait for a service binding or such. Setting this to false allows
* you to prevent your UI from being shown during that time.
*
* The default value for this is taken from the
* {@link android.R.attr#windowNoDisplay} attribute of the activity's theme.
*/
public void setVisible(boolean visible) {
if (mVisibleFromClient != visible) {
mVisibleFromClient = visible;
if (mVisibleFromServer) {
if (visible) makeVisible();
else mDecor.setVisibility(View.INVISIBLE);
}
}
}
void makeVisible() {
if (!mWindowAdded) {
ViewManager wm = getWindowManager();
wm.addView(mDecor, getWindow().getAttributes());
mWindowAdded = true;
}
mDecor.setVisibility(View.VISIBLE);
}
/**
* Check to see whether this activity is in the process of finishing,
* either because you called {@link #finish} on it or someone else
* has requested that it finished. This is often used in
* {@link #onPause} to determine whether the activity is simply pausing or
* completely finishing.
*
* @return If the activity is finishing, returns true; else returns false.
*
* @see #finish
*/
public boolean isFinishing() {
return mFinished;
}
/**
* Returns true if the final {@link #onDestroy()} call has been made
* on the Activity, so this instance is now dead.
*/
public boolean isDestroyed() {
return mDestroyed;
}
/**
* Check to see whether this activity is in the process of being destroyed in order to be
* recreated with a new configuration. This is often used in
* {@link #onStop} to determine whether the state needs to be cleaned up or will be passed
* on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}.
*
* @return If the activity is being torn down in order to be recreated with a new configuration,
* returns true; else returns false.
*/
public boolean isChangingConfigurations() {
return mChangingConfigurations;
}
/**
* Cause this Activity to be recreated with a new instance. This results
* in essentially the same flow as when the Activity is created due to
* a configuration change -- the current instance will go through its
* lifecycle to {@link #onDestroy} and a new instance then created after it.
*/
public void recreate() {
if (mParent != null) {
throw new IllegalStateException("Can only be called on top-level activity");
}
if (Looper.myLooper() != mMainThread.getLooper()) {
throw new IllegalStateException("Must be called from main thread");
}
mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false);
}
/**
* Finishes the current activity and specifies whether to remove the task associated with this
* activity.
*/
private void finish(boolean finishTask) {
if (mParent == null) {
int resultCode;
Intent resultData;
synchronized (this) {
resultCode = mResultCode;
resultData = mResultData;
}
if (false) Log.v(TAG, "Finishing self: token=" + mToken);
try {
if (resultData != null) {
resultData.prepareToLeaveProcess();
}
if (ActivityManagerNative.getDefault()
.finishActivity(mToken, resultCode, resultData, finishTask)) {
mFinished = true;
}
} catch (RemoteException e) {
// Empty
}
} else {
mParent.finishFromChild(this);
}
}
/**
* Call this when your activity is done and should be closed. The
* ActivityResult is propagated back to whoever launched you via
* onActivityResult().
*/
public void finish() {
finish(false);
}
/**
* Finish this activity as well as all activities immediately below it
* in the current task that have the same affinity. This is typically
* used when an application can be launched on to another task (such as
* from an ACTION_VIEW of a content type it understands) and the user
* has used the up navigation to switch out of the current task and in
* to its own task. In this case, if the user has navigated down into
* any other activities of the second application, all of those should
* be removed from the original task as part of the task switch.
*
* Note that this finish does not allow you to deliver results
* to the previous activity, and an exception will be thrown if you are trying
* to do so. You will receive this call immediately before onResume() when your
* activity is re-starting.
*
* @param requestCode The integer request code originally supplied to
* startActivityForResult(), allowing you to identify who this
* result came from.
* @param resultCode The integer result code returned by the child activity
* through its setResult().
* @param data An Intent, which can return result data to the caller
* (various data can be attached to Intent "extras").
*
* @see #startActivityForResult
* @see #createPendingResult
* @see #setResult(int)
*/
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
}
/**
* Create a new PendingIntent object which you can hand to others
* for them to use to send result data back to your
* {@link #onActivityResult} callback. The created object will be either
* one-shot (becoming invalid after a result is sent back) or multiple
* (allowing any number of results to be sent through it).
*
* @param requestCode Private request code for the sender that will be
* associated with the result data when it is returned. The sender can not
* modify this value, allowing you to identify incoming results.
* @param data Default data to supply in the result, which may be modified
* by the sender.
* @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT},
* {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE},
* {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT},
* {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT},
* or any of the flags as supported by
* {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts
* of the intent that can be supplied when the actual send happens.
*
* @return Returns an existing or new PendingIntent matching the given
* parameters. May return null only if
* {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been
* supplied.
*
* @see PendingIntent
*/
public PendingIntent createPendingResult(int requestCode, @NonNull Intent data,
@PendingIntent.Flags int flags) {
String packageName = getPackageName();
try {
data.prepareToLeaveProcess();
IIntentSender target =
ActivityManagerNative.getDefault().getIntentSender(
ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName,
mParent == null ? mToken : mParent.mToken,
mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null,
UserHandle.myUserId());
return target != null ? new PendingIntent(target) : null;
} catch (RemoteException e) {
// Empty
}
return null;
}
/**
* Change the desired orientation of this activity. If the activity
* is currently in the foreground or otherwise impacting the screen
* orientation, the screen will immediately be changed (possibly causing
* the activity to be restarted). Otherwise, this will be used the next
* time the activity is visible.
*
* @param requestedOrientation An orientation constant as used in
* {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}.
*/
public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) {
if (mParent == null) {
try {
ActivityManagerNative.getDefault().setRequestedOrientation(
mToken, requestedOrientation);
} catch (RemoteException e) {
// Empty
}
} else {
mParent.setRequestedOrientation(requestedOrientation);
}
}
/**
* Return the current requested orientation of the activity. This will
* either be the orientation requested in its component's manifest, or
* the last requested orientation given to
* {@link #setRequestedOrientation(int)}.
*
* @return Returns an orientation constant as used in
* {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}.
*/
@ActivityInfo.ScreenOrientation
public int getRequestedOrientation() {
if (mParent == null) {
try {
return ActivityManagerNative.getDefault()
.getRequestedOrientation(mToken);
} catch (RemoteException e) {
// Empty
}
} else {
return mParent.getRequestedOrientation();
}
return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
}
/**
* Return the identifier of the task this activity is in. This identifier
* will remain the same for the lifetime of the activity.
*
* @return Task identifier, an opaque integer.
*/
public int getTaskId() {
try {
return ActivityManagerNative.getDefault()
.getTaskForActivity(mToken, false);
} catch (RemoteException e) {
return -1;
}
}
/**
* Return whether this activity is the root of a task. The root is the
* first activity in a task.
*
* @return True if this is the root activity, else false.
*/
public boolean isTaskRoot() {
try {
return ActivityManagerNative.getDefault()
.getTaskForActivity(mToken, true) >= 0;
} catch (RemoteException e) {
return false;
}
}
/**
* Move the task containing this activity to the back of the activity
* stack. The activity's order within the task is unchanged.
*
* @param nonRoot If false then this only works if the activity is the root
* of a task; if true it will work for any activity in
* a task.
*
* @return If the task was moved (or it was already at the
* back) true is returned, else false.
*/
public boolean moveTaskToBack(boolean nonRoot) {
try {
return ActivityManagerNative.getDefault().moveActivityTaskToBack(
mToken, nonRoot);
} catch (RemoteException e) {
// Empty
}
return false;
}
/**
* Returns class name for this activity with the package prefix removed.
* This is the default name used to read and write settings.
*
* @return The local class name.
*/
@NonNull
public String getLocalClassName() {
final String pkg = getPackageName();
final String cls = mComponent.getClassName();
int packageLen = pkg.length();
if (!cls.startsWith(pkg) || cls.length() <= packageLen
|| cls.charAt(packageLen) != '.') {
return cls;
}
return cls.substring(packageLen+1);
}
/**
* Returns complete component name of this activity.
*
* @return Returns the complete component name for this activity
*/
public ComponentName getComponentName()
{
return mComponent;
}
/**
* Retrieve a {@link SharedPreferences} object for accessing preferences
* that are private to this activity. This simply calls the underlying
* {@link #getSharedPreferences(String, int)} method by passing in this activity's
* class name as the preferences name.
*
* @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default
* operation, {@link #MODE_WORLD_READABLE} and
* {@link #MODE_WORLD_WRITEABLE} to control permissions.
*
* @return Returns the single SharedPreferences instance that can be used
* to retrieve and modify the preference values.
*/
public SharedPreferences getPreferences(int mode) {
return getSharedPreferences(getLocalClassName(), mode);
}
private void ensureSearchManager() {
if (mSearchManager != null) {
return;
}
mSearchManager = new SearchManager(this, null);
}
@Override
public Object getSystemService(@ServiceName @NonNull String name) {
if (getBaseContext() == null) {
throw new IllegalStateException(
"System services not available to Activities before onCreate()");
}
if (WINDOW_SERVICE.equals(name)) {
return mWindowManager;
} else if (SEARCH_SERVICE.equals(name)) {
ensureSearchManager();
return mSearchManager;
}
return super.getSystemService(name);
}
/**
* Change the title associated with this activity. If this is a
* top-level activity, the title for its window will change. If it
* is an embedded activity, the parent can do whatever it wants
* with it.
*/
public void setTitle(CharSequence title) {
mTitle = title;
onTitleChanged(title, mTitleColor);
if (mParent != null) {
mParent.onChildTitleChanged(this, title);
}
}
/**
* Change the title associated with this activity. If this is a
* top-level activity, the title for its window will change. If it
* is an embedded activity, the parent can do whatever it wants
* with it.
*/
public void setTitle(int titleId) {
setTitle(getText(titleId));
}
/**
* Change the color of the title associated with this activity.
*
* This method is deprecated starting in API Level 11 and replaced by action
* bar styles. For information on styling the Action Bar, read the Action Bar developer
* guide.
*
* @deprecated Use action bar styles instead.
*/
@Deprecated
public void setTitleColor(int textColor) {
mTitleColor = textColor;
onTitleChanged(mTitle, textColor);
}
public final CharSequence getTitle() {
return mTitle;
}
public final int getTitleColor() {
return mTitleColor;
}
protected void onTitleChanged(CharSequence title, int color) {
if (mTitleReady) {
final Window win = getWindow();
if (win != null) {
win.setTitle(title);
if (color != 0) {
win.setTitleColor(color);
}
}
}
}
protected void onChildTitleChanged(Activity childActivity, CharSequence title) {
}
/**
* Sets information describing this Activity for presentation inside the Recents System UI. When
* {@link ActivityManager#getRecentTasks} is called, the activities of each task are
* traversed in order from the topmost activity to the bottommost. The traversal continues for
* each property until a suitable value is found. For each task those values will be returned in
* {@link android.app.ActivityManager.RecentsActivityValues}.
*
* @see ActivityManager#getRecentTasks
* @see android.app.ActivityManager.RecentsActivityValues
*
* @param values The Recents values that describe this activity.
*/
public void setRecentsActivityValues(ActivityManager.RecentsActivityValues values) {
ActivityManager.RecentsActivityValues activityValues =
new ActivityManager.RecentsActivityValues(values);
// Scale the icon down to something reasonable
if (values.icon != null) {
final int size = ActivityManager.getLauncherLargeIconSizeInner(this);
activityValues.icon = Bitmap.createScaledBitmap(values.icon, size, size, true);
}
try {
ActivityManagerNative.getDefault().setRecentsActivityValues(mToken, activityValues);
} catch (RemoteException e) {
}
}
/**
* Sets the visibility of the progress bar in the title.
*
* In order for the progress bar to be shown, the feature must be requested
* via {@link #requestWindowFeature(int)}.
*
* @param visible Whether to show the progress bars in the title.
*/
public final void setProgressBarVisibility(boolean visible) {
getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON :
Window.PROGRESS_VISIBILITY_OFF);
}
/**
* Sets the visibility of the indeterminate progress bar in the title.
*
* In order for the progress bar to be shown, the feature must be requested
* via {@link #requestWindowFeature(int)}.
*
* @param visible Whether to show the progress bars in the title.
*/
public final void setProgressBarIndeterminateVisibility(boolean visible) {
getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS,
visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF);
}
/**
* Sets whether the horizontal progress bar in the title should be indeterminate (the circular
* is always indeterminate).
*
* In order for the progress bar to be shown, the feature must be requested
* via {@link #requestWindowFeature(int)}.
*
* @param indeterminate Whether the horizontal progress bar should be indeterminate.
*/
public final void setProgressBarIndeterminate(boolean indeterminate) {
getWindow().setFeatureInt(Window.FEATURE_PROGRESS,
indeterminate ? Window.PROGRESS_INDETERMINATE_ON
: Window.PROGRESS_INDETERMINATE_OFF);
}
/**
* Sets the progress for the progress bars in the title.
*
* In order for the progress bar to be shown, the feature must be requested
* via {@link #requestWindowFeature(int)}.
*
* @param progress The progress for the progress bar. Valid ranges are from
* 0 to 10000 (both inclusive). If 10000 is given, the progress
* bar will be completely filled and will fade out.
*/
public final void setProgress(int progress) {
getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START);
}
/**
* Sets the secondary progress for the progress bar in the title. This
* progress is drawn between the primary progress (set via
* {@link #setProgress(int)} and the background. It can be ideal for media
* scenarios such as showing the buffering progress while the default
* progress shows the play progress.
*
* In order for the progress bar to be shown, the feature must be requested
* via {@link #requestWindowFeature(int)}.
*
* @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from
* 0 to 10000 (both inclusive).
*/
public final void setSecondaryProgress(int secondaryProgress) {
getWindow().setFeatureInt(Window.FEATURE_PROGRESS,
secondaryProgress + Window.PROGRESS_SECONDARY_START);
}
/**
* Suggests an audio stream whose volume should be changed by the hardware
* volume controls.
*
* The suggested audio stream will be tied to the window of this Activity.
* If the Activity is switched, the stream set here is no longer the
* suggested stream. The client does not need to save and restore the old
* suggested stream value in onPause and onResume.
*
* @param streamType The type of the audio stream whose volume should be
* changed by the hardware volume controls. It is not guaranteed that
* the hardware volume controls will always change this stream's
* volume (for example, if a call is in progress, its stream's volume
* may be changed instead). To reset back to the default, use
* {@link AudioManager#USE_DEFAULT_STREAM_TYPE}.
*/
public final void setVolumeControlStream(int streamType) {
getWindow().setVolumeControlStream(streamType);
}
/**
* Gets the suggested audio stream whose volume should be changed by the
* hardware volume controls.
*
* @return The suggested audio stream type whose volume should be changed by
* the hardware volume controls.
* @see #setVolumeControlStream(int)
*/
public final int getVolumeControlStream() {
return getWindow().getVolumeControlStream();
}
/**
* Runs the specified action on the UI thread. If the current thread is the UI
* thread, then the action is executed immediately. If the current thread is
* not the UI thread, the action is posted to the event queue of the UI thread.
*
* @param action the action to run on the UI thread
*/
public final void runOnUiThread(Runnable action) {
if (Thread.currentThread() != mUiThread) {
mHandler.post(action);
} else {
action.run();
}
}
/**
* Standard implementation of
* {@link android.view.LayoutInflater.Factory#onCreateView} used when
* inflating with the LayoutInflater returned by {@link #getSystemService}.
* This implementation does nothing and is for
* pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps
* should use {@link #onCreateView(View, String, Context, AttributeSet)}.
*
* @see android.view.LayoutInflater#createView
* @see android.view.Window#getLayoutInflater
*/
@Nullable
public View onCreateView(String name, Context context, AttributeSet attrs) {
return null;
}
/**
* Standard implementation of
* {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)}
* used when inflating with the LayoutInflater returned by {@link #getSystemService}.
* This implementation handles
* Call this whenever the background of a translucent Activity has changed to become opaque.
* Doing so will allow the {@link android.view.Surface} of the Activity behind to be released.
*
* This call has no effect on non-translucent activities or on activities with the
* {@link android.R.attr#windowIsFloating} attribute.
*
* @see #convertToTranslucent(TranslucentConversionListener)
* @see TranslucentConversionListener
*
* @hide
*/
public void convertFromTranslucent() {
try {
mTranslucentCallback = null;
if (ActivityManagerNative.getDefault().convertFromTranslucent(mToken)) {
WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true);
}
} catch (RemoteException e) {
// pass
}
}
/**
* Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from
* opaque to translucent following a call to {@link #convertFromTranslucent()}.
*
* Calling this allows the Activity behind this one to be seen again. Once all such Activities
* have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will
* be called indicating that it is safe to make this activity translucent again. Until
* {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image
* behind the frontmost Activity will be indeterminate.
*
* This call has no effect on non-translucent activities or on activities with the
* {@link android.R.attr#windowIsFloating} attribute.
*
* @param callback the method to call when all visible Activities behind this one have been
* drawn and it is safe to make this Activity translucent again.
*
* @see #convertFromTranslucent()
* @see TranslucentConversionListener
*
* @hide
*/
public void convertToTranslucent(TranslucentConversionListener callback) {
try {
mTranslucentCallback = callback;
mChangeCanvasToTranslucent =
ActivityManagerNative.getDefault().convertToTranslucent(mToken);
} catch (RemoteException e) {
// pass
}
}
/** @hide */
void onTranslucentConversionComplete(boolean drawComplete) {
if (mTranslucentCallback != null) {
mTranslucentCallback.onTranslucentConversionComplete(drawComplete);
mTranslucentCallback = null;
}
if (mChangeCanvasToTranslucent) {
WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false);
}
}
/**
* Adjust the current immersive mode setting.
*
* Note that changing this value will have no effect on the activity's
* {@link android.content.pm.ActivityInfo} structure; that is, if
* Note: If you are looking for a notification callback that an action mode
* has been started for this activity, see {@link #onActionModeStarted(ActionMode)}. If this method returns false the app can trivially call
* {@link #navigateUpTo(Intent)} using the same parameters to correctly perform
* up navigation. If this method returns false, the app should synthesize a new task stack
* by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation. If the indicated activity does not appear in the history stack, this will finish
* each activity in this task until the root activity of the task is reached, resulting in
* an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy
* when an activity may be reached by a path not passing through a canonical parent
* activity. This method should be used when performing up navigation from within the same task
* as the destination. If up navigation should cross tasks in some cases, see
* {@link #shouldUpRecreateTask(Intent)}.
*
*
* true to prevent this event from being propagated
* further, or false to indicate that you have not handled
* this event and it should continue to be propagated.
* @see #onKeyUp
* @see android.view.KeyEvent
*/
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (getApplicationInfo().targetSdkVersion
>= Build.VERSION_CODES.ECLAIR) {
event.startTracking();
} else {
onBackPressed();
}
return true;
}
if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) {
return false;
} else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) {
if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL,
keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) {
return true;
}
return false;
} else {
// Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_*
boolean clearSpannable = false;
boolean handled;
if ((event.getRepeatCount() != 0) || event.isSystem()) {
clearSpannable = true;
handled = false;
} else {
handled = TextKeyListener.getInstance().onKeyDown(
null, mDefaultKeySsb, keyCode, event);
if (handled && mDefaultKeySsb.length() > 0) {
// something useable has been typed - dispatch it now.
final String str = mDefaultKeySsb.toString();
clearSpannable = true;
switch (mDefaultKeyMode) {
case DEFAULT_KEYS_DIALER:
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
break;
case DEFAULT_KEYS_SEARCH_LOCAL:
startSearch(str, false, null, false);
break;
case DEFAULT_KEYS_SEARCH_GLOBAL:
startSearch(str, false, null, true);
break;
}
}
}
if (clearSpannable) {
mDefaultKeySsb.clear();
mDefaultKeySsb.clearSpans();
Selection.setSelection(mDefaultKeySsb,0);
}
return handled;
}
}
/**
* Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent)
* KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle
* the event).
*/
public boolean onKeyLongPress(int keyCode, KeyEvent event) {
return false;
}
/**
* Called when a key was released and not handled by any of the views
* inside of the activity. So, for example, key presses while the cursor
* is inside a TextView will not trigger the event (unless it is a navigation
* to another object) because TextView handles its own key presses.
*
* true to prevent this event from being propagated
* further, or false to indicate that you have not handled
* this event and it should continue to be propagated.
* @see #onKeyDown
* @see KeyEvent
*/
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (getApplicationInfo().targetSdkVersion
>= Build.VERSION_CODES.ECLAIR) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking()
&& !event.isCanceled()) {
onBackPressed();
return true;
}
}
return false;
}
/**
* Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent)
* KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle
* the event).
*/
public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
return false;
}
/**
* Called when the activity has detected the user's press of the back
* key. The default implementation simply finishes the current activity,
* but you can override this to do whatever you want.
*/
public void onBackPressed() {
if (!mFragments.popBackStackImmediate()) {
finishWithTransition();
}
}
/**
* Called when a key shortcut event is not handled by any of the views in the Activity.
* Override this method to implement global key shortcuts for the Activity.
* Key shortcuts can also be implemented by setting the
* {@link MenuItem#setShortcut(char, char) shortcut} property of menu items.
*
* @param keyCode The value in event.getKeyCode().
* @param event Description of the key event.
* @return True if the key shortcut was handled.
*/
public boolean onKeyShortcut(int keyCode, KeyEvent event) {
return false;
}
/**
* Called when a touch screen event was not handled by any of the views
* under it. This is most useful to process touch events that happen
* outside of your window bounds, where there is no view to receive it.
*
* @param event The touch screen event being processed.
*
* @return Return true if you have consumed the event, false if you haven't.
* The default implementation always returns false.
*/
public boolean onTouchEvent(MotionEvent event) {
if (mWindow.shouldCloseOnTouch(this, event)) {
finish();
return true;
}
return false;
}
/**
* Called when the trackball was moved and not handled by any of the
* views inside of the activity. So, for example, if the trackball moves
* while focus is on a button, you will receive a call here because
* buttons do not normally do anything with trackball events. The call
* here happens before trackball movements are converted to
* DPAD key events, which then get sent back to the view hierarchy, and
* will be processed at the point for things like focus navigation.
*
* @param event The trackball event being processed.
*
* @return Return true if you have consumed the event, false if you haven't.
* The default implementation always returns false.
*/
public boolean onTrackballEvent(MotionEvent event) {
return false;
}
/**
* Called when a generic motion event was not handled by any of the
* views inside of the activity.
* android:immersive but may be changed at runtime by
* {@link #setImmersive}.
*
* @see #setImmersive(boolean)
* @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE
*/
public boolean isImmersive() {
try {
return ActivityManagerNative.getDefault().isImmersive(mToken);
} catch (RemoteException e) {
return false;
}
}
/**
* Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a
* fullscreen opaque Activity.
* android:immersive is set to true
* in the application's manifest entry for this activity, the {@link
* android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will
* always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE
* FLAG_IMMERSIVE} bit set.
*
* @see #isImmersive()
* @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE
*/
public void setImmersive(boolean i) {
try {
ActivityManagerNative.getDefault().setImmersive(mToken, i);
} catch (RemoteException e) {
// pass
}
}
/**
* Start an action mode.
*
* @param callback Callback that will manage lifecycle events for this context mode
* @return The ContextMode that was started, or null if it was canceled
*
* @see ActionMode
*/
@Nullable
public ActionMode startActionMode(ActionMode.Callback callback) {
return mWindow.getDecorView().startActionMode(callback);
}
/**
* Give the Activity a chance to control the UI for an action mode requested
* by the system.
*
* null if the activity does not want to
* provide special handling for this action mode. (It will be handled by the system.)
*/
@Nullable
@Override
public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) {
initWindowDecorActionBar();
if (mActionBar != null) {
return mActionBar.startActionMode(callback);
}
return null;
}
/**
* Notifies the Activity that an action mode has been started.
* Activity subclasses overriding this method should call the superclass implementation.
*
* @param mode The new action mode.
*/
@Override
public void onActionModeStarted(ActionMode mode) {
}
/**
* Notifies the activity that an action mode has finished.
* Activity subclasses overriding this method should call the superclass implementation.
*
* @param mode The action mode that just finished.
*/
@Override
public void onActionModeFinished(ActionMode mode) {
}
/**
* Returns true if the app should recreate the task when navigating 'up' from this activity
* by using targetIntent.
*
* listener allows
* The Activity to listen to events of the entering transition and control the mapping of
* shared elements. This requires {@link Window#FEATURE_CONTENT_TRANSITIONS}.
*
* @param listener Used to listen to events in the entering transition.
*/
public void setActivityTransitionListener(ActivityOptions.ActivityTransitionListener listener) {
if (mEnterTransitionCoordinator != null) {
mEnterTransitionCoordinator.setActivityTransitionListener(listener);
}
}
// ------------------ Internal API ------------------
final void setParent(Activity parent) {
mParent = parent;
}
final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token,
Application application, Intent intent, ActivityInfo info, CharSequence title,
Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances,
Configuration config) {
attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id,
lastNonConfigurationInstances, config);
}
final void attach(Context context, ActivityThread aThread,
Instrumentation instr, IBinder token, int ident,
Application application, Intent intent, ActivityInfo info,
CharSequence title, Activity parent, String id,
NonConfigurationInstances lastNonConfigurationInstances,
Configuration config) {
attach(context, aThread, instr, token, ident, application, intent, info, title, parent, id,
lastNonConfigurationInstances, config, null, null);
}
final void attach(Context context, ActivityThread aThread,
Instrumentation instr, IBinder token, int ident,
Application application, Intent intent, ActivityInfo info,
CharSequence title, Activity parent, String id,
NonConfigurationInstances lastNonConfigurationInstances,
Configuration config, Bundle options, IVoiceInteractor voiceInteractor) {
attachBaseContext(context);
mFragments.attachActivity(this, mContainer, null);
mWindow = PolicyManager.makeNewWindow(this);
mWindow.setCallback(this);
mWindow.setOnWindowDismissedCallback(this);
mWindow.getLayoutInflater().setPrivateFactory(this);
if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) {
mWindow.setSoftInputMode(info.softInputMode);
}
if (info.uiOptions != 0) {
mWindow.setUiOptions(info.uiOptions);
}
mUiThread = Thread.currentThread();
mMainThread = aThread;
mInstrumentation = instr;
mToken = token;
mIdent = ident;
mApplication = application;
mIntent = intent;
mComponent = intent.getComponent();
mActivityInfo = info;
mTitle = title;
mParent = parent;
mEmbeddedID = id;
mLastNonConfigurationInstances = lastNonConfigurationInstances;
mVoiceInteractor = voiceInteractor != null
? new VoiceInteractor(this, this, voiceInteractor, Looper.myLooper()) : null;
mWindow.setWindowManager(
(WindowManager)context.getSystemService(Context.WINDOW_SERVICE),
mToken, mComponent.flattenToString(),
(info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0);
if (mParent != null) {
mWindow.setContainer(mParent.getWindow());
}
mWindowManager = mWindow.getWindowManager();
mCurrentConfig = config;
if (options != null) {
ActivityOptions activityOptions = new ActivityOptions(options);
if (activityOptions.getAnimationType() == ActivityOptions.ANIM_SCENE_TRANSITION) {
mEnterTransitionCoordinator = activityOptions.createEnterActivityTransition(this);
}
}
}
/** @hide */
public final IBinder getActivityToken() {
return mParent != null ? mParent.getActivityToken() : mToken;
}
final void performCreateCommon() {
mVisibleFromClient = !mWindow.getWindowStyle().getBoolean(
com.android.internal.R.styleable.Window_windowNoDisplay, false);
mFragments.dispatchActivityCreated();
}
final void performCreate(Bundle icicle) {
onCreate(icicle);
performCreateCommon();
}
final void performCreate(Bundle icicle, PersistableBundle persistentState) {
onCreate(icicle, persistentState);
performCreateCommon();
}
final void performStart() {
mFragments.noteStateNotSaved();
mCalled = false;
mFragments.execPendingActions();
mInstrumentation.callActivityOnStart(this);
if (!mCalled) {
throw new SuperNotCalledException(
"Activity " + mComponent.toShortString() +
" did not call through to super.onStart()");
}
mFragments.dispatchStart();
if (mAllLoaderManagers != null) {
final int N = mAllLoaderManagers.size();
LoaderManagerImpl loaders[] = new LoaderManagerImpl[N];
for (int i=N-1; i>=0; i--) {
loaders[i] = mAllLoaderManagers.valueAt(i);
}
for (int i=0; i