Add APIs to remove tasks.

You can remove sub-tasks inside of a task, or an entire task.

When removing an entire task, you can have its process killed
as well.

When the process is killed, any running services will get an
onTaskRemoved() callback for them to do cleanup before their
process is killed (and the service possibly restarted).

Or they can set a new android:stopWithTask attribute to just
have the service automatically (cleanly) stopped at this point.

Change-Id: I1891bc2da006fa53b99c52f9040f1145650e6808

2 files changed, 62 insertions, 14 deletions

diff --git a/tests/ActivityTests/AndroidManifest.xml b/tests/ActivityTests/AndroidManifest.xml
index 6fa27ed..de3b6d1 100644
--- a/tests/ActivityTests/AndroidManifest.xml
+++ b/tests/ActivityTests/AndroidManifest.xml
@@ -17,6 +17,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.test.activity">
     <uses-permission android:name="android.permission.GET_TASKS" />
+    <uses-permission android:name="android.permission.REORDER_TASKS" />
+    <uses-permission android:name="android.permission.REMOVE_TASKS" />
     <uses-permission android:name="android.permission.READ_FRAME_BUFFER" />
     <application android:label="ActivityTest">
         <activity android:name="ActivityTestMain">
diff --git a/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java b/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
index 8c5c35a..583c13c 100644
--- a/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
+++ b/tests/ActivityTests/src/com/google/android/test/activity/ActivityTestMain.java
@@ -23,6 +23,7 @@ import android.app.Activity;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
 import android.app.Application;
+import android.content.ActivityNotFoundException;
 import android.os.Bundle;
 import android.graphics.BitmapFactory;
 import android.graphics.Bitmap;
@@ -43,7 +44,11 @@ import android.util.DisplayMetrics;
 import android.util.Log;
 
 public class ActivityTestMain extends Activity {
-    private void addThumbnail(LinearLayout container, Bitmap bm) {
+    ActivityManager mAm;
+
+    private void addThumbnail(LinearLayout container, Bitmap bm,
+            final ActivityManager.RecentTaskInfo task,
+            final ActivityManager.TaskThumbnails thumbs, final int subIndex) {
         ImageView iv = new ImageView(this);
         if (bm != null) {
             iv.setImageBitmap(bm);
@@ -52,24 +57,72 @@ public class ActivityTestMain extends Activity {
         int w = getResources().getDimensionPixelSize(android.R.dimen.thumbnail_width);
         int h = getResources().getDimensionPixelSize(android.R.dimen.thumbnail_height);
         container.addView(iv, new LinearLayout.LayoutParams(w, h));
+
+        iv.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (task.id >= 0 && thumbs != null) {
+                    if (subIndex < (thumbs.numSubThumbbails-1)) {
+                        mAm.removeSubTask(task.id, subIndex+1);
+                    }
+                    mAm.moveTaskToFront(task.id, ActivityManager.MOVE_TASK_WITH_HOME);
+                } else {
+                    try {
+                        startActivity(task.baseIntent);
+                    } catch (ActivityNotFoundException e) {
+                        Log.w("foo", "Unable to start task: " + e);
+                    }
+                }
+                buildUi();
+            }
+        });
+        iv.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View v) {
+                if (task.id >= 0 && thumbs != null) {
+                    if (subIndex < 0) {
+                        mAm.removeTask(task.id, ActivityManager.REMOVE_TASK_KILL_PROCESS);
+                    } else {
+                        mAm.removeSubTask(task.id, subIndex);
+                    }
+                    buildUi();
+                    return true;
+                }
+                return false;
+            }
+        });
     }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        ActivityManager am = (ActivityManager)getSystemService(ACTIVITY_SERVICE);
+        mAm = (ActivityManager)getSystemService(ACTIVITY_SERVICE);
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        buildUi();
+    }
+
+    private View scrollWrap(View view) {
+        ScrollView scroller = new ScrollView(this);
+        scroller.addView(view, new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT,
+                ScrollView.LayoutParams.MATCH_PARENT));
+        return scroller;
+    }
 
+    private void buildUi() {
         LinearLayout top = new LinearLayout(this);
         top.setOrientation(LinearLayout.VERTICAL);
 
-        List<ActivityManager.RecentTaskInfo> recents = am.getRecentTasks(10,
+        List<ActivityManager.RecentTaskInfo> recents = mAm.getRecentTasks(10,
                 ActivityManager.RECENT_WITH_EXCLUDED);
         if (recents != null) {
             for (int i=0; i<recents.size(); i++) {
                 ActivityManager.RecentTaskInfo r = recents.get(i);
-                ActivityManager.TaskThumbnails tt = r != null
-                        ? am.getTaskThumbnails(r.persistentId) : null;
+                ActivityManager.TaskThumbnails tt = mAm.getTaskThumbnails(r.persistentId);
                 TextView tv = new TextView(this);
                 tv.setText(r.baseIntent.getComponent().flattenToShortString());
                 top.addView(tv, new LinearLayout.LayoutParams(
@@ -77,9 +130,9 @@ public class ActivityTestMain extends Activity {
                         LinearLayout.LayoutParams.WRAP_CONTENT));
                 LinearLayout item = new LinearLayout(this);
                 item.setOrientation(LinearLayout.HORIZONTAL);
-                addThumbnail(item, tt != null ? tt.mainThumbnail : null);
+                addThumbnail(item, tt != null ? tt.mainThumbnail : null, r, tt, -1);
                 for (int j=0; j<tt.numSubThumbbails; j++) {
-                    addThumbnail(item, tt.getSubThumbnail(j));
+                    addThumbnail(item, tt.getSubThumbnail(j), r, tt, j);
                 }
                 top.addView(item, new LinearLayout.LayoutParams(
                         LinearLayout.LayoutParams.WRAP_CONTENT,
@@ -89,11 +142,4 @@ public class ActivityTestMain extends Activity {
 
         setContentView(scrollWrap(top));
     }
-
-    private View scrollWrap(View view) {
-        ScrollView scroller = new ScrollView(this);
-        scroller.addView(view, new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT,
-                ScrollView.LayoutParams.MATCH_PARENT));
-        return scroller;
-    }
 }