0

我有一个应用程序有几个按钮有声音（soundPool）我需要把它们写在闪存卡上我通过了MediaRecorder但是当我运行应用程序然后打开录音播放并单击停止录音应用程序崩溃你做不告诉我是什么问题？我希望在方法中recordStop

public class MainActivity extends Activity {


    int kickSound;
    SoundPool mSoundPool;
    AssetManager assets;

  private MediaRecorder mediaRecorder;
  private MediaPlayer mediaPlayer;
  private String fileName;

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

    mSoundPool = new SoundPool(3, AudioManager.STREAM_MUSIC, 0);
    assets = getAssets();

    kickSound = loadSound("snare_trap.ogg");

    ImageButton kick = (ImageButton)this.findViewById(R.id.imageButton1);
    kick.setOnTouchListener(new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN){
                playSound(kickSound);
            }
            return false;
        }
    });


    fileName = Environment.getExternalStorageDirectory() + "/record.3gpp";
  }

  protected void playSound(int sound) {

        if (sound > 0)
          mSoundPool.play(sound, 1, 1, 1, 0, 1);
      }


      private int loadSound(String fileName) {
            AssetFileDescriptor afd = null;
            try {
              afd = assets.openFd(fileName);
            } catch (IOException e) {
              e.printStackTrace();
              Toast.makeText(this, "Couldn't load file '" + fileName + "'", Toast.LENGTH_SHORT).show();
              return -1;
            }
            return mSoundPool.load(afd, 1);
          }


  public void recordStart(View v) {
    try {
      releaseRecorder();

      File outFile = new File(fileName);
      if (outFile.exists()) {
        outFile.delete();
      }

      mediaRecorder = new MediaRecorder();
      mediaRecorder.setAudioSource(AudioManager.STREAM_MUSIC);
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
      mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
      mediaRecorder.setOutputFile(fileName);
      mediaRecorder.prepare();
      mediaRecorder.start();
    } catch (Exception e) {
      e.printStackTrace();
    }

  }

  public void recordStop(View v) {
      mediaRecorder.stop();
    }


  public void playStart(View v) {
    try {
      releasePlayer();
      mediaPlayer = new MediaPlayer();
      mediaPlayer.setDataSource(fileName);
      mediaPlayer.prepare();
      mediaPlayer.start();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void playStop(View v) {
    if (mediaPlayer != null) {
      mediaPlayer.stop();
    }
  }

  private void releaseRecorder() {
    if (mediaRecorder != null) {
      mediaRecorder.release();
      mediaRecorder = null;
    }
  }

  private void releasePlayer() {

      mediaPlayer.release();
      mediaPlayer = null;
    }


  @Override
  protected void onDestroy() {
    super.onDestroy();
    releasePlayer();
    releaseRecorder();
  }

}
4

1 回答 1

0

你为什么要发布录音机开始？仅当您不想再访问记录器时才应使用释放。尝试将版本移动到最后。

于 2014-01-30T19:08:40.570 回答