Properly handle changes in phone audio focus. (01ae5f68) · Commits · e / os / android_frameworks_base

media/java/android/media/AudioService.java

+8 −4

Original line number	Diff line number	Diff line
		@@ -4183,10 +4183,11 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
		private void notifyTopOfAudioFocusStack() {
		// notify the top of the stack it gained focus
		if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
		if (canReassignAudioFocus()) {
		String clientId = mFocusStack.peek().mClientId;
		if (canReassignAudioFocusTo(clientId)) {
		try {
		mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
		AudioManager.AUDIOFOCUS_GAIN, mFocusStack.peek().mClientId);
		AudioManager.AUDIOFOCUS_GAIN, clientId);
		} catch (RemoteException e) {
		Log.e(TAG, "Failure to signal gain of audio control focus due to "+ e);
		e.printStackTrace();
		@@ -4334,9 +4335,12 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
		* Helper function:
		* Returns true if the system is in a state where the focus can be reevaluated, false otherwise.
		*/
		private boolean canReassignAudioFocus() {
		private boolean canReassignAudioFocusTo(String clientId) {
		// focus requests are rejected during a phone call or when the phone is ringing
		// this is equivalent to IN_VOICE_COMM_FOCUS_ID having the focus
		if (IN_VOICE_COMM_FOCUS_ID.equals(clientId)) {
		return true;
		}
		if (!mFocusStack.isEmpty() && IN_VOICE_COMM_FOCUS_ID.equals(mFocusStack.peek().mClientId)) {
		return false;
		}
		@@ -4381,7 +4385,7 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
		}

		synchronized(mAudioFocusLock) {
		if (!canReassignAudioFocus()) {
		if (!canReassignAudioFocusTo(clientId)) {
		return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
		}