Question

如何在Android中隐藏MediaPlayer

Answer 1

这段代码对我有用，

MediaPlayer mp = MediaPlayer.create(context, R.raw.sound_file_1);
mp.start();

静音

mp.setVolume(0,0);

＆安培; 取消静音或完整音量

mp.setVolume(1,1);

Answer 2

 AudioManager   mAudioManager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);

    int current_volume =mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
    //If you want to player is mute ,then set_volume variable is zero.Otherwise you may supply some value.
    int set_volume=0;
    mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC,set_volume, 0);

Answer 3

您可能希望淡出声音，而不是立即将其设置为完整（1.0f）或零（0.0f）音量。

这有点棘手，因为您需要一个异步任务来保持您的应用响应：

mpMain是我播放循环背景音乐的MediaPlayer实例。我也关心OnPause（）和OnResume（）。

方法playBackgroundMusic用于打开音乐，fadeOutBackgroundMusic关闭音乐，但通过淡出音量0.5秒（10 * 50，请参阅while和Thread.sleep）。

我的基本卷是0.8f，您可能想要将其作为异步任务的参数或使用静态全局变量。

public void playBackgroundMusic( Boolean isOn ){
  if(isOn){
    // prevent conflics with async fade-out task
    if(mtask_fadeout_music!=null){
      mtask_fadeout_music.cancel(true);
      mtask_fadeout_music=null;
    }
    if(mpMain==null){
      mpMain = MediaPlayer.create(this, R.raw.zin___piano_2_140bpm_32158);
      mpMain.setLooping(true);
      mpMain.setVolume(0.8f,0.8f);
      mpMain.start();                         
    }
  }
  else{
    if(mtask_fadeout_music==null){
      fadeOutBackgroundMusic();
    }
  }
}

public void fadeOutBackgroundMusic(){
  mtask_fadeout_music = (FadeOutMusic)new FadeOutMusic( ).execute( );
}


//
//  background processing ... fade out music stream
//
public class FadeOutMusic extends AsyncTask<String,Integer,String> {

  @Override
  protected String doInBackground(String... args) {
    float level = 0.8f;
    int i = 1;

    while(i<50){
        i++;
        if(mpMain != null){
          level=level*0.9f;
          mpMain.setVolume(level, level);         
        }
        try {
          Thread.sleep(10);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
    }
    return "dummy";
  }

  @Override
  protected void onPostExecute( String dummy ) {
    if(mpMain != null){
      mpMain.setVolume(0,0);         
      mpMain.release();
      mpMain = null;  
    }
    if(mtask_fadeout_music!=null){
      mtask_fadeout_music = null;
    }
  }       

  @Override
  public void onCancelled() {
    if(mpMain != null){
      mpMain.setVolume(0,0);         
      mpMain.release();
      mpMain = null;  
    }
    if(mtask_fadeout_music!=null){
      mtask_fadeout_music = null;
    }
  }
}

Answer 4

filter_select("owner", "Car owner:", shared_df1, ~ owner) filter_select("owner", "Car owner:", shared_df2, ~ owner)已弃用。使用下面的替代代码。

AudioManger.setStreamMute

Answer 5

试试这个......

   AudioManager manager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
manager.setStreamMute(AudioManager.STREAM_MUSIC, true);

将静音完成媒体音量静音

Answer 6

试试这个

AudioManager am = getSystemService(Context.AUDIO_SERVICE);
// Request audio focus.
am.requestAudioFocus(listener, AudioManager.STREAM_MUSIC,AudioManager.AUDIOFOCUS_GAIN);

http://developer.android.com/training/managing-audio/audio-focus.html

Answer 7

我们可以使用以下方法进行静音/取消静音或检查音频播放器是否处于静音状态

/**
 * To Mute or Un-mute using Audio Manager
 */
private fun updateMuteState(mute: Boolean) {
    activity?.let {
        getAudioManager(it).adjustStreamVolume(
            AudioManager.STREAM_MUSIC,
            if (mute) -100 else 100,
            0
        )
    }
}

/**
 * Return true -> audio player is in mute state, false otherwise
 */
private fun isMute(): Boolean {
    activity?.let {
        getAudioManager(it).getStreamVolume(AudioManager.STREAM_MUSIC).let { volume ->
            return volume == 0
        }
    }
    return false
}

/**
 * To Get the Audio Manager
 */
private fun getAudioManager(context: Context) =
    context.getSystemService(Context.AUDIO_SERVICE) as AudioManager

如何在android中静音MediaPlayer

7 个答案: