android - why views do not appear when we use thread -

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protected void oncreate(bundle savedinstancestate) {     // todo auto-generated method stub     super.oncreate(savedinstancestate);     this.requestwindowfeature(window.feature_no_title);     setcontentview(r.layout.activity_welcome);      new thread(new btthread()).start(); }

in btthread, there public void run() method thread.sleep(3000)first , jump activity. during first activity time, cannot see content of activity_welcome. if ideas this, appreciate have help.

you can't start new activity on thread other main thread.

if btthread inner class of activity can call

runonuithread(new runnable() {     public void run() {         //startactivity     } });

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