Question

如何在没有音频的情况下播放视频，并且不会中断背景音乐？也就是说，音乐应用或Soundcloud等后台应用播放的音频不应该停止播放。

如果您查看Facebook应用，则自动播放视频功能不会中断/停止背景音乐。我想在我的应用程序中使用类似的行为。

Answer 1

在视频视图中尝试setAudioFocusRequest（AUDIOFOCUS_NONE）

Answer 2

如果您使用的是ExoPlayer，则可以执行以下操作：

SimpleExoPlayer simpleExoPlayer = new SimpleExoPlayer.Builder(this).build();
// just add below line to stop background music 
simpleExoPlayer.setAudioAttributes(simpleExoPlayer.getAudioAttributes(), /* 
handleAudioFocus= */ true);

Answer 3

以下代码可以正常工作

 private void gainFocus( AudioManager.OnAudioFocusChangeListener focusChangeListener){
        AudioManager am = (AudioManager)getContext().getSystemService(Context.AUDIO_SERVICE);

        // Request audio focus for playback

        int result = am.requestAudioFocus(focusChangeListener,
                // Use the music stream.
                AudioManager.STREAM_MUSIC,
                // Request permanent focus.
                AudioManager.AUDIOFOCUS_GAIN);


        if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
            // other app had stopped playing song now , so u can do u stuff now .
        }
    }

并在活动的onCreate（）方法中注册音频焦点的侦听器，然后根据音频焦点的条件状态调用gainfocus（）方法

  void registerAudioFocus(){
        if(mMediaPlayer!=null){

            /*code for stop other application sound while app video playing*/
            focusChangeListener =
                    new AudioManager.OnAudioFocusChangeListener() {
                        public void onAudioFocusChange(int focusChange) {
                            AudioManager am =(AudioManager)getContext().getSystemService(Context.AUDIO_SERVICE);
                            switch (focusChange) {

                                case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) :
                                    // Lower the volume while ducking.
                                    if(mMediaPlayer!=null)
                                        mMediaPlayer.setVolume(0.2f, 0.2f);
                                    //Toast.makeText(getContext(),"AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK",Toast.LENGTH_LONG).show();
                                    break;
                                case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT) :
                                    pause();
                                    //  Toast.makeText(getContext(),"AUDIOFOCUS_LOSS_TRANSIENT",Toast.LENGTH_LONG).show();

                                    break;

                                case (AudioManager.AUDIOFOCUS_LOSS) :

                                        if(mMediaPlayerValid) {
                                            gainFocus(this);
                                        }
                                        else
                                        {
                                            ((AudioManager)getContext().getSystemService(Context.AUDIO_SERVICE)).abandonAudioFocus(focusChangeListener);
                                        }

                                    break;

                                case (AudioManager.AUDIOFOCUS_GAIN) :
                                    // Return the volume to normal and resume if paused.
                                      //  Toast.makeText(getContext(),"AUDIOFOCUS_GAIN",Toast.LENGTH_LONG).show();

                                    if(mMediaPlayer!=null) {
                                        mMediaPlayer.setVolume(1f, 1f);
                                        mMediaPlayer.start();
                                    }

                                        gainFocus(this);


                                    break;
                                default: break;
                            }
                        }
                    };

            gainFocus(focusChangeListener);
        }
    }

请这个对我来说很好

Answer 4

我猜您正在使用VideoView来显示视频。尝试使用SurfaceView。我已经尝试了两种，事实上VideoView会停止任何第三方音乐应用，而SurfaceView则不会。

在不中断/停止Android中的背景音频的情况下播放视频

4 个答案: