android - Splash screen displays white screen and then black before it sets the menu page -

my app has splash screen animated logo(using thread) , menu page displayed.

now want background activity in splash screen. want convert images string etc.

i have placed code in oncreate() function. problem instead of splash screen see blank white screen , black screen. after sometime menu page displayed usual.

if comment code of background processing functions perfectly. background code working correctly. not working together. there no errors in logcat , unable know wrong.

please help. urgent... thanks.

java code of splash screen

public class splash extends activity {  protected int _splashtime = 10000;   private thread splashtread;  /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     //makefolder();      this.requestwindowfeature(window.feature_no_title);     //remove notification bar     this.getwindow().setflags(windowmanager.layoutparams.flag_fullscreen, windowmanager.layoutparams.flag_fullscreen);     setcontentview(r.layout.splash);           makefolder();        imageview im =(imageview)findviewbyid(r.id.imageview2);      final animation mobianim = animationutils.loadanimation(this, r.anim.mobianim);      im.setanimation(mobianim);     mobianim.setduration(1000);      animate();   //  animatelogo();        final splash splashscreen = this;       // thread displaying splashscreen     splashtread = new thread() {         @override         public void run() {             try {                                    synchronized(this){                     wait(_splashtime);                  }               } catch(interruptedexception e) {}              {                 finish();                  intent = new intent();                 i.setclass(splashscreen, menupg.class);                 startactivity(i);                  // stop();             }         }     };      splashtread.start();          /*                **code doing background things**         */  }  public void makefolder(){     file direct = new file(environment.getexternalstoragedirectory() + "/myfolder");      if(!direct.exists())      {          if(direct.mkdir()){ //directory created;       }     }     }  @override public boolean ontouchevent(motionevent event) {     if (event.getaction() == motionevent.action_down) {         synchronized(splashtread){             splashtread.notifyall();         }     }     return true; }   public void animate(){         imageview iv1=(imageview)findviewbyid(r.id.imageview1);           alphaanimation alphaamin = new alphaanimation(0,1);         iv1.setanimation(alphaamin);         alphaamin.setduration(5000);  } } 

is code doing background things running in thread or part of ui thread?
because animation wont shown until oncreate method finishes, be.

also use startanimation(animation) on imageviews start in moment.