mediaplayer.start() and mediaplayer.pause() crashing the app

Question

// Necessary libraries are imported.

public class MainActivity extends AppCompatActivity {
    MediaPlayer mPlayer;

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

    public void playAudio(View view) {
        mPlayer.create(this, R.raw.hahah);
        mPlayer.start();
    }

    public void pauseAudio(View view) {
        mPlayer.pause();
    }

}

This is my MainActivity. The app crashes as soon as I press play or pause button. This app works when I remove both the buttons and allow it to start playing automatically in onCreate method.

Open the logcat viewer. A stacktrace should be given when the app crashes. There's also no code where the mPlayer is being instantiated. — JensV, Mar 22 '19 at 10:37

Urvish Jani · Accepted Answer · 2019-03-22T11:13:05.627

3

You forgot

MediaPlayer mPlayer =new MediaPlayer();

in onCreate method

edited Mar 22 '19 at 11:13

answered Mar 22 '19 at 11:01

Urvish Jani

104
1
4

score 0 · Answer 2 · edited Mar 22 '19 at 18:30

0

You must initialize class before using it. Object is not created for the mplayer.

Initialize it in the onCreate() method

MediaPlayer mPlayer =new MediaPlayer();

edited Mar 22 '19 at 18:30

AskNilesh

67,701
16
123
163

answered Mar 22 '19 at 11:54

Magudesh

419
5
13

score 0 · Answer 3 · answered Mar 22 '19 at 12:01

Well, whenever you define a variable but don't assign value to it, it will crash the app. Here you are creating a MediaPlayer but not assigning it. You should add this code in your onCreate() method:

MediaPlayer mMediaPlayer = new MediaPlayer();

This will create a new instance of the MediaPlayer object and you can reuse the functions of that class.

mediaplayer.start() and mediaplayer.pause() crashing the app

3 Answers3