メディアプレーヤーを次のトラックに自動的に切り替える方法は？

Question

私は曲が終わったときに自動的に次の曲に切り替えるつもりです、それは自動的に再生する必要があります着メロに従います。

：現在時刻の曲が動作しないtexеview setOnCompletionListenerの-doesで出力する必要があり、それが現在は

//変数

 int[] soundsRawResIds = new int[]{R.raw.belarus, R.raw.russian, R.raw.japan, 
      R.raw.litva, R.raw.england, R.raw.finlandia, R.raw.france}; 

    private final Handler handler = new Handler(); 

    @Override 
    public void onCreate(Bundle icicle) { 
     super.onCreate(icicle); 
     setContentView(R.layout.activity_main); 
     initViews(); 
     currenttime=(TextView)findViewById(R.id.timeSound); 
     buttonPlayStop = (Button) findViewById(R.id.ButtonPlayStop); 

    } 
    private void initViews() { 
     mediaPlayer = MediaPlayer.create(this, soundsRawResIds[0]); 
     seekBar = (SeekBar) findViewById(R.id.seekBar); 
     seekBar.setMax(mediaPlayer.getDuration()); 
     seekBar.setOnTouchListener(new View.OnTouchListener() { 
      @Override 
      public boolean onTouch(View v, MotionEvent event) { 
       seekChange(v); 

       return false; 
      } 
     }); 
    } 


    private void seekChange(View v){ 
     if(mediaPlayer.isPlaying()){ 
      seekBar = (SeekBar)v; 
      mediaPlayer.seekTo(seekBar.getProgress()); 


     } 
    } 
    public void playAndStop(View v){ 
     if (buttonPlayStop.getText() == getString(R.string.play_str)) { 
      buttonPlayStop.setText(getString(R.string.pause_str)); 

       mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 
        @Override 
        public void onCompletion(MediaPlayer mp) { 
         index++; 
         mp.reset(); 
         if (index < soundsRawResIds.length) { 
          try { 
           AssetFileDescriptor afd = getResources().openRawResourceFd(soundsRawResIds[index]); 
           if (afd != null) { 
            mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); 
            afd.close(); 
            mp.prepare(); 
           } 
          } catch (Exception ex) { 
           // report a crash 
          } 
         } else { 
          // done with media player 
          mp.release(); 
          mp = null; 
         } 
        } 
       }); 

       mediaPlayer.start(); 
       startPlayProgressUpdater(); 

     }else { 
      buttonPlayStop.setText(getString(R.string.play_str)); 
      mediaPlayer.pause(); 
     } 
    } 
    public void startPlayProgressUpdater() { 
     seekBar.setProgress(mediaPlayer.getCurrentPosition()); 

     if (mediaPlayer.isPlaying()) { 
      Runnable notification = new Runnable() { 
       public void run() { 
        startPlayProgressUpdater(); 
        if(seekBar.getProgress()==100){ 
         for(int index=0;index<soundsRawResIds.length;index++){ 

          index++; 
         } 
        } 

       } 
      }; 
      handler.postDelayed(notification,1000); 
     }else{ 
      mediaPlayer.pause(); 
      buttonPlayStop.setText(getString(R.string.play_str)); 
      seekBar.setProgress(0); 
     } 
    } 
} 

私のXMLコードを終了した次のトラックに行きません

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     android:orientation="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"> 

     <SeekBar 
      android:layout_width="fill_parent" 
      android:progress="0" 
      android:max="100" 
      android:layout_height="wrap_content" 
      android:id="@+id/seekBar"/> 
     <Button 
      android:text="@string/play_str" 
      android:textSize="15pt" 
      android:textStyle="bold" 
      android:onClick="playAndStop" 
      android:id="@+id/ButtonPlayStop" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center" 
      android:layout_marginRight="-3dp"/> 
     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:id="@+id/timeSound" 
      android:textSize="30sp" 
      android:text="00:00" 
      /> 

    </LinearLayout> 

Answer 1

onCompletionListenerをmediaPlayerに設定します。

mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 
    @Override 
    public void onCompletion(MediaPlayer mp) { 
      //custom method to play next song 
      playNextSong();   
    } 
}); 

配列からの単純な例。

private String[] songPaths; 
private int playingPostion=0; 

public void play(){ 
    if(mediaPlayer==null){ 
     mediaPlayer=new MediaPlayer(); 
    }else{ 
     mediaPlayer.reset(); 
    } 
    //your array contains resource files.First convert them to a uri before submitting to the mediaPlayer 
    String uri = "android.resource://" + getPackageName() + "/"+songPaths[playingPosition]; 
    mediaPlayer.setDataSource(Uri.parse(uri)); 
    mediaPlayer.prepare(); 
    mediaPlayer.start(); 
    //prepare your textviews and seekbar 

    //prepare the player to play next song from array after completing current song 
    if(playingPosition==0){ 
    if(songPaths.length>1){ 
     playingPosition++; 
    } 
    }else if((playingPosition+1)==songPaths.length){ 
     playingPosition=0; 
    }else{ 
     playingPostion++; 
    } 

    mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 
       @Override 
       public void onCompletion(MediaPlayer mp) { 
        play(); 
        //do anything else you desire 
       } 
      }); 
} 

上記のコードはあくまでも一例です。あなたのスレッドを使用し、文を正しくキャッチしてみてください。