Android：24次点击后声音无法播放

Question

So I am a programming beginner and while making a simple soundboard app with 8 buttons, i got a strange problem where it stops playing sound after the 24th button press.Here's the java code:

public class MainActivity extends AppCompatActivity {

    MediaPlayer mediaPlayer;
    int i = 0;
    public void playSound(View view){

            switch(view.getId())
            {
                case R.id.button1:
                    mediaPlayer = MediaPlayer.create(this, R.raw.doyouspeakenglish);
                    break;
                case R.id.button2:
                    mediaPlayer = MediaPlayer.create(this, R.raw.goodevening);
                    break;
                case R.id.button3:
                    mediaPlayer = MediaPlayer.create(this, R.raw.hello);
                    break;
                case R.id.button4:
                    mediaPlayer = MediaPlayer.create(this, R.raw.howareyou);
                    break;
                case R.id.button5:
                    mediaPlayer = MediaPlayer.create(this, R.raw.ilivein);
                    break;
                case R.id.button6:
                    mediaPlayer = MediaPlayer.create(this, R.raw.mynameis);
                    break;
                case R.id.button7:
                    mediaPlayer = MediaPlayer.create(this, R.raw.please);
                    break;
                case R.id.button8:
                    mediaPlayer = MediaPlayer.create(this, R.raw.welcome);
                    break;
                default:
                    throw new RuntimeException("Unknown button ID");
            }
            i++;
        Log.i("klik", Integer.toString(i));
            mediaPlayer.start();
    }

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

And here's the error message,I'm not allowed to post the image for being a new user so here's a link

Answer 1

You are not releasing the media player resource , so you need to close and release them as well

Releasing the MediaPlayer

public void playSound(View view){
        if (null != mediaPlayer) {
            mediaPlayer.stop();
            mediaPlayer.release();
        }

        switch(view.getId())
        {
            case R.id.button1:
                mediaPlayer = MediaPlayer.create(this, R.raw.doyouspeakenglish);
                break;
            case R.id.button2:
                mediaPlayer = MediaPlayer.create(this, R.raw.goodevening);
                break;
            case R.id.button3:
                mediaPlayer = MediaPlayer.create(this, R.raw.hello);
                break;
            case R.id.button4:
                mediaPlayer = MediaPlayer.create(this, R.raw.howareyou);
                break;
            case R.id.button5:
                mediaPlayer = MediaPlayer.create(this, R.raw.ilivein);
                break;
            case R.id.button6:
                mediaPlayer = MediaPlayer.create(this, R.raw.mynameis);
                break;
            case R.id.button7:
                mediaPlayer = MediaPlayer.create(this, R.raw.please);
                break;
            case R.id.button8:
                mediaPlayer = MediaPlayer.create(this, R.raw.welcome);
                break;
            default:
                throw new RuntimeException("Unknown button ID");
        }
        i++;
    Log.i("klik", Integer.toString(i));
        mediaPlayer.start();
}

Answer 2

Please read the Annotations on the Media Player:

When done with the MediaPlayer, you should call release(), to free the resources. If not released, too many MediaPlayer instances will result in an exception.

So before calling MediaPlayer.create again just call

mediaPlayer.stop();
mediaPlayer.release();