Question

when I add a ViewFlipper, the UI thread seems to wait for the onCreate() method in the activity to be finished. Then it shows the second view. Why does it happen?

My current code is:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_menu);    

    viewFlipper = (ViewFlipper) findViewById(R.id.ScreenSwitch);
    viewFlipper.setInAnimation(AnimationUtils.makeInAnimation(this, true));
    viewFlipper.setOutAnimation(AnimationUtils.makeOutAnimation(this, true));

    //do the necessary loading, when the splash screen persists 
    doSomeLoading();

    viewFlipper.showNext();

}

Actually, the doSomeLoading consists of a for loop counting to ten millions and doing nothing. Now it just waits for loop to be done and shows the second view.

I would really appreciate a solution without having to create a separate Thread, because it seems to be pointless, invalidate() doesn’t help there.

Answer 1

Maybe with viewFlipper.showPrevious();?

EDIT

I don’t have your full code but here is the idea :
When you do long loading or slow actions, most of the time, you can think AsynTask or background thread.
So you need to create a new inner class. Lets say AsyncLoader. You will implement the method doInBackground() of this class and put your doSomeLoading() in it.
Now, implement onPostExecute() and put your viewFlipper.showNext(); in it.
Then, in your onCreate() method, replace the doSomeLoading() by new AsyncLoader.execute();
This should be nice. I might have forgotten some stuff as it’s not real code. Check this for more explanations.