Question

如何在不使用OncompletionListener（）;

的情况下一个接一个地播放音频文件

这是我的代码：

mp.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                // TODO Auto-generated method stub
                i = i + 1;
                System.out.println("" + audio.length);
                if(i < audio.length){
                    img.setImageResource(image[i]);
                    try {
                        descriptor = getAssets().openFd(audio[i]);
                        mp.reset();
                        mp.setDataSource( descriptor.getFileDescriptor(), descriptor.getStartOffset(),descriptor.getLength());
                        descriptor.close();
                        mp.prepare();
                        mp.start();
                        xml();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }

这里的方法xml（）包含我从资源文件夹中挑选的图像和音频文件

我还需要动态播放这些文件

请帮助

Answer 1

此服务从您的raw加载音频文件，您必须在活动中调用startService()才能启动此服务，不要忘记将此服务添加到您的Android清单中。

已编辑

public class Backgroundmusic extends Service {
    // Binder given to clients
    private final IBinder mBinder = new LocalBinder();
    // Random number generator
    private final Random mGenerator = new Random();

    private SoundPool soundPool;
    private HashMap<Integer, Integer> soundsMap;
    int SOUND1=1;
    int SOUND2=2;
@Override
public void onCreate() {
    // TODO Auto-generated method stub
    super.onCreate();

    soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 100);
    soundsMap = new HashMap<Integer, Integer>();
    soundsMap.put(SOUND1, soundPool.load(this, R.raw.baby_laugh, 1));
    soundsMap.put(SOUND2, soundPool.load(this, R.raw.touchdown, 1));
}
public void playSound(int sound, float fSpeed) {
    AudioManager mgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    float streamVolumeCurrent = mgr.getStreamVolume(AudioManager.STREAM_MUSIC);
    float streamVolumeMax = mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    float volume = streamVolumeCurrent / streamVolumeMax;


    soundPool.play(soundsMap.get(sound), volume, volume, 1, 0, fSpeed);
   }


/**
 * Class used for the client Binder.  Because we know this service always
 * runs in the same process as its clients, we don't need to deal with IPC.
 */
public class LocalBinder extends Binder {
    LocalService getService() {
        // Return this instance of LocalService so clients can call public methods
        return LocalService.this;
    }
}

@Override
public IBinder onBind(Intent intent) {
    return mBinder;
}

/** method for clients */
public int getRandomNumber() {
  return mGenerator.nextInt(100);
}

public void soundPlay(int index){

     playSound(index, 1.0f);
     Log.d("SOUND1","hi1");

}   }

如何在不使用OnCompletionListener（）的情况下动态播放音频文件

1 个答案: