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Commit ac5a8e14 authored by Nancy Chen's avatar Nancy Chen
Browse files

Grab audio focus when listening to voicemail. 

Music and other audio should be paused when listening to a voicemail.
The voicemail player grabs transient focus so that when the voicemail is
paused or finished, the focus returns to the music that was playing.

Bug: 19589110
Change-Id: I9876cc2700139d0db787d0e370020d2a38d82cda
parent d10eef28

src/com/android/dialer/voicemail/VoicemailPlaybackPresenter.java

+36 −1
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ package com.android.dialer.voicemail; 
import android.content.Context;

import android.database.ContentObserver;

import android.media.AudioManager;

import android.media.AudioManager.OnAudioFocusChangeListener;

import android.media.MediaPlayer;

import android.net.Uri;

import android.os.AsyncTask;
@@ -59,7 +60,7 @@ import javax.annotation.concurrent.ThreadSafe; 
 */

@NotThreadSafe

@VisibleForTesting

public class VoicemailPlaybackPresenter {

public class VoicemailPlaybackPresenter implements OnAudioFocusChangeListener {

    /** The stream used to playback voicemail. */

    private static final int PLAYBACK_STREAM = AudioManager.STREAM_VOICE_CALL;
@@ -172,6 +173,7 @@ public class VoicemailPlaybackPresenter { 
    private AsyncTask<Void, ?, ?> mPrepareTask;

    private int mPosition;

    private boolean mPlaying;

    private AudioManager mAudioManager;



    public VoicemailPlaybackPresenter(PlaybackView view, MediaPlayerProxy player,

            Uri voicemailUri, ScheduledExecutorService executorService,
@@ -482,6 +484,15 @@ public class VoicemailPlaybackPresenter { 
                mPlayer.seekTo(startPosition);

                mView.setClipPosition(startPosition, duration);

                try {

                    // Grab audio focus here

                    int result = getAudioManager().requestAudioFocus(

                            VoicemailPlaybackPresenter.this,

                            PLAYBACK_STREAM,

                            AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);



                    if (result != AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {

                        throw new RejectedExecutionException("Could not capture audio focus.");

                    }

                    // Can throw RejectedExecutionException

                    mPlayer.start();

                    setPositionAndPlayingStatus(mPlayer.getCurrentPosition(), true);
@@ -504,6 +515,29 @@ public class VoicemailPlaybackPresenter { 
        }

    }



    private AudioManager getAudioManager() {

        if (mAudioManager == null) {

            mAudioManager = (AudioManager)

                    mView.getDataSourceContext().getSystemService(Context.AUDIO_SERVICE);

        }

        return mAudioManager;

    }



    @Override

    public void onAudioFocusChange(int focusChange) {

        boolean lostFocus = focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT ||

                focusChange == AudioManager.AUDIOFOCUS_LOSS;

        // Note: the below logic is the same as in {@code StartStopButtonListener}.

        if (mPlayer.isPlaying() && lostFocus) {

            setPositionAndPlayingStatus(mPlayer.getCurrentPosition(), false);

            stopPlaybackAtPosition(mPlayer.getCurrentPosition(), mDuration.get());

        } else if (!mPlayer.isPlaying() && focusChange == AudioManager.AUDIOFOCUS_GAIN) {

            setPositionAndPlayingStatus(mPosition, true);

            postSuccessfullyFetchedContent();

        }

    }





    private void resetPrepareStartPlaying(final int clipPositionInMillis) {

        if (mPrepareTask != null) {

            mPrepareTask.cancel(false);
@@ -525,6 +559,7 @@ public class VoicemailPlaybackPresenter { 
    }



    private void stopPlaybackAtPosition(int clipPosition, int duration) {

        getAudioManager().abandonAudioFocus(this);

        mPositionUpdater.stopUpdating();

        mView.playbackStopped();

        if (mWakeLock.isHeld()) {