android - Service is not starting -

i have written service streaming url. there twitter button open link browser. when clicked button start service in button event, not starting. service's codes here;

public class mymediaplayerservice extends service implements     onbufferingupdatelistener, oncompletionlistener, onpreparedlistener,     onvideosizechangedlistener, surfaceholder.callback {  private string path = "http://someurl.m3u8"; private mediaplayer mmediaplayer; private static final string media = "media";; private boolean misvideosizeknown = false; private boolean misvideoreadytobeplayed = false; private int mvideowidth; private int mvideoheight;  @override public ibinder onbind(intent intent) {     return null; }  @override public void oncreate() {     super.oncreate();     mmediaplayer = new mediaplayer(this); }  public void onbufferingupdate(mediaplayer arg0, int percent) { }  public void oncompletion(mediaplayer arg0) {  }  public void onvideosizechanged(mediaplayer mp, int width, int height) {      if (width == 0 || height == 0) {          return;     }     misvideosizeknown = true;     mvideowidth = width;     mvideoheight = height;     if (misvideoreadytobeplayed && misvideosizeknown) {         startvideoplayback();     } }  public void onprepared(mediaplayer mediaplayer) {     misvideoreadytobeplayed = true;     if (misvideoreadytobeplayed && misvideosizeknown) {         startvideoplayback();     } }  public void surfacechanged(surfaceholder surfaceholder, int i, int j, int k) { }  public void surfacedestroyed(surfaceholder surfaceholder) { }  public void surfacecreated(surfaceholder holder) { }  public void onpause() {     releasemediaplayer();     docleanup(); }  public void ondestroy() {     super.ondestroy();     releasemediaplayer();     docleanup(); }  private void releasemediaplayer() {     if (mmediaplayer != null) {         mmediaplayer.release();         mmediaplayer = null;     } }  private void docleanup() {     mvideowidth = 0;     mvideoheight = 0;     misvideoreadytobeplayed = false;     misvideosizeknown = false; }  private void startvideoplayback() {     mmediaplayer.start(); }  @override public int onstartcommand(intent intent, int flags, int startid) {      docleanup();     try {         mmediaplayer.setdatasource(path);         mmediaplayer.prepare();         mmediaplayer.setonbufferingupdatelistener(this);         mmediaplayer.setoncompletionlistener(this);         mmediaplayer.setonpreparedlistener(this);         mmediaplayer.setonvideosizechangedlistener(this);         mmediaplayer.getmetadata();         mmediaplayer.start();     } catch (exception e) {         e.printstacktrace();     }      return start_not_sticky; } } 

also have started service in button event this;

public void onclick(view v) {       intent browserintent = new intent(intent.action_view,                      uri.parse("https://twitter.com/standart_fm"));             intent svc = new intent(mainactivity.this,                     mymediaplayerservice.class);             //startservice(new intent(mainactivity.this, myservice.class));             startservice(svc);             startactivity(browserintent);         } 

the log cat is;

07-31 14:44:15.392: d/vitamio[player](562): thread audio_output end 07-31 14:44:15.419: d/vitamio[player](562): thread audio_decode end 07-31 14:44:15.440: i/vitamio[player](562): close stream audio end 07-31 14:44:15.440: i/vitamio[player](562): close avformat begin 07-31 14:44:15.450: i/vitamio[player](562): close avformat end 07-31 14:44:15.450: i/vitamio[player](562): free videopic begin 07-31 14:44:15.450: i/vitamio[player](562): free videopic 2 end 07-31 14:44:15.450: i/vitamio[player](562): free subpic begin 07-31 14:44:15.450: i/vitamio[player](562): free subpic 1 end 07-31 14:44:15.450: i/vitamio[player](562): free audioframe begin 07-31 14:44:15.450: i/vitamio[player](562): free audioframe 8 end 07-31 14:44:15.450: i/vitamio[player](562): delete global ref begin 07-31 14:44:15.450: i/vitamio[player](562): delete global ref end 07-31 14:44:15.450: i/vitamio[player](562): file close end 07-31 14:44:15.450: d/vitamio[player](562): thread notify end 07-31 14:44:15.460: i/vitamio[player](562): vplayer release end 

so. how can run stream service when twitter activity has started?