java - Playing audio for given amount of time in Android -

i new android development.

in application, wanted audio play duration (say 20 seconds). after 20sec should not start play. used getduration() method, didn't need to.

code:

protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     setvolumecontrolstream(audiomanager.stream_music);     button button1=(button)findviewbyid(r.id.button1);     button button2=(button)findviewbyid(r.id.button2);     button1.setonclicklistener(this);     button2.setonclicklistener(this); }  public void onclick(view v) {     int resid;     switch (v.getid()) {     case r.id.button1:         resid = r.raw.a;         break;     case r.id.button2:         resid = r.raw.b;         break;     default:         resid = r.raw.a;         break;     }     // release resources previous mediaplayer     if (mp != null) {         mp.release();     }      mp = mediaplayer.create(this, resid);     mp.start(); }  @override public boolean oncreateoptionsmenu(menu menu) {      getmenuinflater().inflate(r.menu.main, menu);     return true; }  @override protected void ondestroy() {     if(null!=mp){         mp.release();     }     super.ondestroy(); } 

try this:

mp.start(); handler handler=new handler(); handler.postdelayed(new runnable() {     @override     public void run() {         mp.stop();     } }, 20 * 1000); 

after 20 seconds, audio stopped.