Gallery2: Auto pause and replay video when audio focus changed.

Add OnAudioFocusChangeListener in CodeauroraVideoView, pause video when
lose audio focus and replay video when gain audio focus.

Change-Id: Id8e3e4b0afbc72892301a08fb8a122c285fbfe97
CRs-Fixed: 962677

2 files changed, 56 insertions, 10 deletions

diff --git a/src/com/android/gallery3d/app/MoviePlayer.java b/src/com/android/gallery3d/app/MoviePlayer.java
index 94d383295..9536190d1 100755
--- a/src/com/android/gallery3d/app/MoviePlayer.java
+++ b/src/com/android/gallery3d/app/MoviePlayer.java
@@ -139,6 +139,9 @@ public class MoviePlayer implements
     // If the time bar is visible.
     private boolean mShowing;
 
+    // used to track what type of audio focus loss caused the video to pause
+    private boolean mPausedByTransientLossOfFocus = false;
+
     private Virtualizer mVirtualizer;
 
     private MovieActivity mActivityContext;//for dialog and toast context
@@ -220,6 +223,28 @@ public class MoviePlayer implements
         }
     };
 
+    private AudioManager.OnAudioFocusChangeListener mAudioFocusListener =
+            new AudioManager.OnAudioFocusChangeListener() {
+                public void onAudioFocusChange(int focusChange) {
+                    switch (focusChange) {
+                        case AudioManager.AUDIOFOCUS_GAIN:
+                            if (mPausedByTransientLossOfFocus) {
+                                onPlayVideo();
+                                mPausedByTransientLossOfFocus = false;
+                            }
+                            break;
+                        case AudioManager.AUDIOFOCUS_LOSS:
+                        case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
+                            if (mVideoView != null && mVideoView.isPlaying()) {
+                                onPauseVideo();
+                                mPausedByTransientLossOfFocus = true;
+                            }
+                            break;
+                        default:
+                    }
+                }
+            };
+
     public MoviePlayer(View rootView, final MovieActivity movieActivity,
             IMovieItem info, Bundle savedInstance, boolean canReplay) {
         mContext = movieActivity.getApplicationContext();
@@ -236,6 +261,7 @@ public class MoviePlayer implements
 
         mVideoView.setOnErrorListener(this);
         mVideoView.setOnCompletionListener(this);
+        mVideoView.setOnAudioFocusChangeListener(mAudioFocusListener);
 
         if (mVirtualizer != null) {
             mVirtualizer.release();
@@ -686,17 +712,25 @@ public class MoviePlayer implements
     @Override
     public void onPlayPause() {
         if (mVideoView.isPlaying()) {
-            if (mVideoView.canPause()) {
-                pauseVideo();
-                //set view disabled(play/pause asynchronous processing)
-                mController.setViewEnabled(true);
-                if (mControllerRewindAndForwardExt != null) {
-                    mControllerRewindAndForwardExt.showControllerButtonsView(mPlayerExt
-                            .canStop(), false, false);
-                }
-            }
+            onPauseVideo();
         } else {
-            playVideo();
+            onPlayVideo();
+        }
+    }
+
+    private void onPlayVideo() {
+        playVideo();
+        //set view disabled(play/pause asynchronous processing)
+        mController.setViewEnabled(true);
+        if (mControllerRewindAndForwardExt != null) {
+            mControllerRewindAndForwardExt.showControllerButtonsView(mPlayerExt
+                    .canStop(), false, false);
+        }
+    }
+
+    private void onPauseVideo() {
+        if (mVideoView.canPause()) {
+            pauseVideo();
             //set view disabled(play/pause asynchronous processing)
             mController.setViewEnabled(true);
             if (mControllerRewindAndForwardExt != null) {
diff --git a/src/org/codeaurora/gallery3d/video/CodeauroraVideoView.java b/src/org/codeaurora/gallery3d/video/CodeauroraVideoView.java
index 6d01b8adb..696371db9 100755
--- a/src/org/codeaurora/gallery3d/video/CodeauroraVideoView.java
+++ b/src/org/codeaurora/gallery3d/video/CodeauroraVideoView.java
@@ -98,6 +98,7 @@ public class CodeauroraVideoView extends SurfaceView implements MediaPlayerContr
     private boolean mIsShowDialog = false;
     private boolean mErrorDialogShowing = false;
     private KeyguardManager mKeyguardManager;
+    private AudioManager.OnAudioFocusChangeListener mAudioFocusListener;
 
     private final Handler mHandler = new Handler() {
         public void handleMessage(final Message msg) {
@@ -454,6 +455,8 @@ public class CodeauroraVideoView extends SurfaceView implements MediaPlayerContr
             mMediaPlayer = null;
             mCurrentState = STATE_IDLE;
             mTargetState  = STATE_IDLE;
+            AudioManager am = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+            am.abandonAudioFocus(null);
         }
     }
 
@@ -472,6 +475,9 @@ public class CodeauroraVideoView extends SurfaceView implements MediaPlayerContr
             mErrorListener.onError(mMediaPlayer, MediaPlayer.MEDIA_ERROR_UNKNOWN, 0);
             return;
         }
+        AudioManager am = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+        am.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
+
         try {
             mMediaPlayer = new MediaPlayer();
             if (mAudioSession != 0) {
@@ -621,6 +627,10 @@ public class CodeauroraVideoView extends SurfaceView implements MediaPlayerContr
         mOnInfoListener = l;
     }
 
+    public void setOnAudioFocusChangeListener(AudioManager.OnAudioFocusChangeListener l) {
+        mAudioFocusListener = l;
+    }
+
     SurfaceHolder.Callback mSHCallback = new SurfaceHolder.Callback() {
         public void surfaceChanged(SurfaceHolder holder, int format,
                                     int w, int h) {
@@ -693,6 +703,8 @@ public class CodeauroraVideoView extends SurfaceView implements MediaPlayerContr
             if (cleartargetstate) {
                 mTargetState  = STATE_IDLE;
             }
+            AudioManager am = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+            am.abandonAudioFocus(null);
         }
     }