I can not stop and release the player in android

Question

Please explain to me how to properly use the player + SeekBar. using the method of stopping is not an error, but the program crashes when starting and stopping a few songs. using realase error output error

I run the player and seekbar:

holder.start.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
    releaseMP();
    try {
      global_position = position;
      mediaPlayer = new MediaPlayer();
      mediaPlayer.setDataSource(recordBeans.get(global_position).getFile());
      mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
      mediaPlayer.prepareAsync();
      mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mediaPlayer) {
          holder.seekBar.setMax(mediaPlayer.getDuration());
          mediaPlayer.start();
          startPlayProgressUpdater(holder.seekBar);
        }
      });
    } catch (IOException e) {
      e.printStackTrace();
    }
    mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
      @Override
      public void onCompletion(MediaPlayer mediaPlayer) {
        mediaPlayer.release();
        mediaPlayer = null;
      }
    });
  }
});

error points to a string

recordBeans.get(global_position).setSeekPos(mediaPlayer.getCurrentPosition());

Start the player and upgrade method seekbar:

public void startPlayProgressUpdater(final SeekBar seekBar) {
  if (mediaPlayer != null) {
    recordBeans.get(global_position).setSeekPos(mediaPlayer.getCurrentPosition());
  } else {
    recordBeans.get(global_position).setSeekPos(0);
  }
  if ((Integer) seekBar.getTag() == global_position) {
    seekBar.setProgress(recordBeans.get(global_position).getSeekPos());
    }
    if (mediaPlayer != null) {
      Runnable notification = new Runnable() {
        public void run() {
          startPlayProgressUpdater(seekBar);
        }
      };
      handler.postDelayed(notification, 1000);
    }
  }

Stop button:

holder.stop.setOnClickListener(new View.OnClickListener() {

  @Override
  public void onClick(View v) {
    if ((Integer) v.getTag() == global_position && mediaPlayer != null) {
      mediaPlayer.release();
      mediaPlayer = null;
    }
  }
});

When seekbar comes to an end:

java.lang.NullPointerException
at com.example.MANAGMENT.fragments.adapters.RecordAdapter$4.run(RecordAdapter.java:165)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)

Answer 1

try

if (mediaPlayer.isPlaying){
      mediaPlayer.release;
   }

wherever u r releasing media player