Background Music in Android Continously and Forced Close -

well have set of codes activity. have app have more 10 activities. , want have continously background music, stop whenever go activity. , when i'm in activity (also in other activities) when click home button of emu or device, , application "forced closed" hope can me. thankyou

public class advancedkids extends activity implements onclicklistener {   mediaplayer yourstereo;     assetfiledescriptor afd;   public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.advancelay);       view numbers = this.findviewbyid(r.id.button1);     numbers.setonclicklistener(this);      view alphabets = this.findviewbyid(r.id.button2);     alphabets.setonclicklistener(this);      view colors = this.findviewbyid(r.id.button3);     colors.setonclicklistener(this);      view shapes = this.findviewbyid(r.id.button4);     shapes.setonclicklistener(this);      view back= this.findviewbyid(r.id.buttonback);     back.setonclicklistener(this);      try {         // read music file asset folder         afd = getassets().openfd("haha.mp3");         // creation of new media player;         yourstereo = new mediaplayer();         // set player music source.         yourstereo.setdatasource(afd.getfiledescriptor(), afd.getstartoffset(),afd.getlength());         // set looping , play music.         yourstereo.setlooping(true);         yourstereo.prepare();         yourstereo.start();         } catch (ioexception e) {         e.printstacktrace();         }  }         public void onpause() {              super.onpause();             yourstereo.pause();             }              public void onresume() {             super.onresume();             yourstereo.start();             }               protected void onstop() {             super.onstop();             yourstereo.stop();             yourstereo = null;             }             @override             public void onbackpressed(){                new alertdialog.builder(this).seticon(android.r.drawable.ic_dialog_alert).settitle("exit")               .setmessage("are sure want exit?")                .setpositivebutton("yes", new dialoginterface.onclicklistener() {                                        @override                                        public void onclick(dialoginterface dialog, int which) {                                            intent intent = new intent(intent.action_main);                                           intent.addcategory(intent.category_home);                                           intent.setflags(intent.flag_activity_new_task);                                           startactivity(intent);                                           system.exit(0);                                        }              }).setnegativebutton("no", null).show();             }                 public void onclick(view v) {      switch(v.getid()){     case r.id.button1:         intent button1 = new intent(this, numbers.class);         startactivity(button1);         break;      case r.id.button2:         intent button2 = new intent(this, alphabets.class);         startactivity(button2);         break;      case r.id.button3:         intent button3 = new intent(this, colors.class);         startactivity(button3);         break;      case r.id.button4:         intent button4 = new intent(this, shapes.class);         startactivity(button4);         break;      case r.id.buttonback:         intent buttonback = new intent(this, mainactivity.class);         startactivity(buttonback);         break;        }        system.exit(0); } } 

create service

public class myservice extends service implements mediaplayer.onpreparedlistener {     private static final string action_play = "com.example.action.play";     mediaplayer mmediaplayer = null;      public int onstartcommand(intent intent, int flags, int startid) {         ...         if (intent.getaction().equals(action_play)) {             mmediaplayer = ... // initialize here             mmediaplayer.setonpreparedlistener(this);             mmediaplayer.prepareasync(); // prepare async not block main thread         }     }      /** called when mediaplayer ready */     public void onprepared(mediaplayer player) {         player.start();     } } 

start it

startservice(new intent(this, myservice.class)); 

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