播放聲音編程

Question

假設我有一個正在播放一些音樂MediaPlayer的類對象。現在我想要改變音樂以播放設備的內置揚聲器或已經插入耳機。

讓我們說，只需點擊一個按鈕。那可能嗎？

Answer 1

我不能評論因爲我沒有足夠的聲望，所以我會發布它。

只是做一個小的快速搜索：Switching between earpiece and speaker

import android.media.MediaPlayer; 
import android.media.AudioManager; 

public class MediaPlayer { 
    private MediaPlayer mMediaPlayer; 
    private AudioManager mAudioManager; 
    private Button mButton; 
    private boolean isPlayingOnSpeaker = false; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     ... 

     mMediaPlayer = MediaPlayer.create(this, R.raw.song); 
     mMediaPlayer.prepareAsync(); 
     mMediaPlayer.start(); 

     mButton = (Button) findViewById(R.id.button); 

     mButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      context = getActivity().getBaseContext(); 

      mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);   
      mAudioManager.setMode(AudioManager.STREAM_MUSIC); 

      if(isPlayingOnSpeaker) 
       {mAudioManager.setSpeakerphoneOn(false); isPlayingOnSpeaker=false;} 
      else {mAudioManager.setSpeakerphoneOn(true); isPlayingOnSpeaker=true;} 
     } 
     } 

     ... 
    } 
}