Exoplayer:如何通过耳机播放音频？

Question

我正在使用以下代码在设备接近任何对象时将音频流切换到耳机:

@Override
public void onSensorChanged(SensorEvent event) {

    if (mAudioManager.isWiredHeadsetOn() || !(mCurrentPlaybackStatus == STATUS_PLAYING
            || mCurrentPlaybackStatus == STATUS_PREPARING)) {
        return;
    }

    boolean isClose = event.values[0] < mSensor.getMaximumRange();

    if (!mScreenDisabled && isClose) {

        mAudioManager.setMode(AudioManager.STREAM_MUSIC);
        mAudioManager.setSpeakerphoneOn(false);

        disableScreen();

        mScreenDisabled = true;

    } else if (mScreenDisabled && !isClose) {

        mAudioManager.setSpeakerphoneOn(true);
        mAudioManager.setMode(mAudioManagerMode);

        enableScreen();
        mScreenDisabled = false;
    }
}

不幸的是,呼叫时有一个很大的延迟.setMode(AudioManager.STREAM_MUSIC);(> 500ms)

使用Android的默认MediaPlayer,可以毫不延迟地更改输出流:

mediaPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL); // ear piece
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); // speakerphone

有没有办法改变ExoPlayer的输出流？

Answer 1

通过耳机播放

mediaPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);