Settings: ButtonSettings: Introduce recents long press action

Add a new preference in Settings > Buttons > Recents long press action
that controls the behavior of recents long press intent
ACTION_RECENTS_LONG_PRESS.

The user preference is saved in
Settings.Secure.RECENTS_LONG_PRESS_ACTIVITY; if empty the default is the
system's "switch to last app" behavior. Settings.Secure is used
intentionally over Settings.System for permission reasons.

Change-Id: Ifc61b5958a88360e32db31459f0205b6ba5306b3

1 files changed, 84 insertions, 0 deletions

diff --git a/src/com/android/settings/ButtonSettings.java b/src/com/android/settings/ButtonSettings.java
index 6cb6895..95bb3d9 100644
--- a/src/com/android/settings/ButtonSettings.java
+++ b/src/com/android/settings/ButtonSettings.java
@@ -16,8 +16,12 @@
 
 package com.android.settings;
 
+import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
 import android.content.res.Resources;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
@@ -63,6 +67,7 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
     private static final String KEY_SWAP_VOLUME_BUTTONS = "swap_volume_buttons";
     private static final String DISABLE_NAV_KEYS = "disable_nav_keys";
     private static final String KEY_NAVIGATION_BAR_LEFT = "navigation_bar_left";
+    private static final String KEY_NAVIGATION_RECENTS_LONG_PRESS = "navigation_recents_long_press";
     private static final String KEY_POWER_END_CALL = "power_end_call";
     private static final String KEY_HOME_ANSWER_CALL = "home_answer_call";
     private static final String KEY_BLUETOOTH_INPUT_SETTINGS = "bluetooth_input_settings";
@@ -113,6 +118,7 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
     private SwitchPreference mSwapVolumeButtons;
     private SwitchPreference mDisableNavigationKeys;
     private SwitchPreference mNavigationBarLeftPref;
+    private ListPreference mNavigationRecentsLongPressAction;
     private SwitchPreference mPowerEndCall;
     private SwitchPreference mHomeAnswerCall;
 
@@ -182,6 +188,9 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
         // Navigation bar left
         mNavigationBarLeftPref = (SwitchPreference) findPreference(KEY_NAVIGATION_BAR_LEFT);
 
+        // Navigation bar recents long press activity needs custom setup
+        mNavigationRecentsLongPressAction = initRecentsLongPressAction(KEY_NAVIGATION_RECENTS_LONG_PRESS);
+
         // Only visible on devices that does not have a navigation bar already,
         // and don't even try unless the existing keys can be disabled
         boolean needsNavigationBar = false;
@@ -402,6 +411,68 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
         return list;
     }
 
+    private ListPreference initRecentsLongPressAction(String key) {
+        ListPreference list = (ListPreference) getPreferenceScreen().findPreference(key);
+        list.setOnPreferenceChangeListener(this);
+
+        // Read the componentName from Settings.Secure, this is the user's prefered setting
+        String componentString = Settings.Secure.getString(getContentResolver(),
+                Settings.Secure.RECENTS_LONG_PRESS_ACTIVITY);
+        ComponentName targetComponent = null;
+        if (componentString == null) {
+            list.setSummary(getString(R.string.hardware_keys_action_last_app));
+        } else {
+            targetComponent = ComponentName.unflattenFromString(componentString);
+        }
+
+        // Dyanamically generate the list array, query PackageManager for all Activites that are registered for
+        // ACTION_RECENTS_LONG_PRESS
+        PackageManager pm = getPackageManager();
+        Intent intent = new Intent(Intent.ACTION_RECENTS_LONG_PRESS);
+        List<ResolveInfo> recentsActivities = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
+        if (recentsActivities.size() == 0) {
+            // No entries available, disable
+            list.setSummary(getString(R.string.hardware_keys_action_last_app));
+            Settings.Secure.putString(getContentResolver(), Settings.Secure.RECENTS_LONG_PRESS_ACTIVITY, null);
+            list.setEnabled(false);
+            return list;
+        }
+
+        CharSequence[] entries = new CharSequence[recentsActivities.size() + 1];
+        CharSequence[] values = new CharSequence[recentsActivities.size() + 1];
+        // First entry is always default last app
+        entries[0] = getString(R.string.hardware_keys_action_last_app);
+        values[0] = "";
+        list.setValue(values[0].toString());
+        int i = 1;
+        for (ResolveInfo info : recentsActivities) {
+            try {
+                // Use pm.getApplicationInfo for the label, we cannot rely on ResolveInfo that comes back from
+                // queryIntentActivities.
+                entries[i] = pm.getApplicationInfo(info.activityInfo.packageName, 0).loadLabel(pm);
+            } catch (PackageManager.NameNotFoundException e) {
+                Log.e(TAG, "Error package not found: " + info.activityInfo.packageName, e);
+                // Fallback to package name
+                entries[i] = info.activityInfo.packageName;
+            }
+
+            // Set the value to the ComponentName that will handle this intent
+            ComponentName entryComponent = new ComponentName(info.activityInfo.packageName, info.activityInfo.name);
+            values[i] = entryComponent.flattenToString();
+            if (targetComponent != null) {
+                if (entryComponent.equals(targetComponent)) {
+                    // Update the selected value and the preference summary
+                    list.setSummary(entries[i]);
+                    list.setValue(values[i].toString());
+                }
+            }
+            i++;
+        }
+        list.setEntries(entries);
+        list.setEntryValues(values);
+        return list;
+    }
+
     private void handleActionListChange(ListPreference pref, Object newValue, String setting) {
         String value = (String) newValue;
         int index = pref.findIndexOfValue(value);
@@ -452,6 +523,19 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
             handleActionListChange(mVolumeKeyCursorControl, newValue,
                     Settings.System.VOLUME_KEY_CURSOR_CONTROL);
             return true;
+        } else if (preference == mNavigationRecentsLongPressAction) {
+            // RecentsLongPressAction is handled differently because it intentionally uses Settings.
+            // Settings.System.
+            String putString = (String) newValue;
+            int index = mNavigationRecentsLongPressAction.findIndexOfValue(putString);
+            CharSequence summary = mNavigationRecentsLongPressAction.getEntries()[index];
+            // Update the summary
+            mNavigationRecentsLongPressAction.setSummary(summary);
+            if (putString.length() == 0) {
+                putString = null;
+            }
+            Settings.Secure.putString(getContentResolver(), Settings.Secure.RECENTS_LONG_PRESS_ACTIVITY, putString);
+            return true;
         }
         return false;
     }