befor the MainActivity shows in my app a white page shows in android -

i wrote app , first activity splash screen befor activity null white page shows. how can remove that? code

 protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_splash);     getactionbar().hide();     delay=4000;     new handler().postdelayed(new runnable() {     @override     public void run() {     intent intent_obj=new intent(splash.this,content.class);     startactivity(intent_obj);     finish();     }     },delay); 

try adding handler code in separate function.

 public void splashtimer(int duration) {     new handler().postdelayed(new runnable() {         @override         public void run() {             intent intent_obj = new intent(splash.this, content.class);             startactivity(intent_obj);             finish();         }     }, duration); } 

and call oncreate() method