Question

Is there a way where i can stop the MediaPlayer automatically after 20 seconds?
Does the function seekTo(20) works?

Answer 1

If you use seekTo(20) it will skip the song to 20 miliseconds, so that’s not what you need.

You can use Handler.postDelayed for this:

public final boolean postDelayed (Runnable r, long delayMillis)

Causes the Runnable r to be added to the message queue, to be run after the specified amount of time elapses. The runnable will be run on the thread to which this handler is attached.

First you create a new Handler, than you call postDelayed() to execute a new Runnable object. If you want to use it to pause a mediaplayer, here’s a little example for you:

Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    public void run() {
        myMediaPlayer.stop();
    }
}, 20000);