Force a full screen Activity to remeasure/redraw on resume?

Question

Edited to add more details: (originally asked nearly two months ago...still haven\'t found a solution)

I have an activity with a somewhat complicate

Answer 1

I have found a Solution to this:

    @Override
    protected void onResume() {
        Log.e("", "onResume");
        super.onResume();

        //this is a simple Splash with "Game paused" Text inside! in my main.xml
        final LinearLayout gamePause_text = (LinearLayout) findViewById(R.id.gamePause_text);
        OnGlobalLayoutListener asdf = new OnGlobalLayoutListener(){
            public void onGlobalLayout() {
                Log.e("", "onGlobalLayout");
                getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                                     WindowManager.LayoutParams.FLAG_FULLSCREEN);
                gameSurface.onResume(); //OpenGL Surface onResume();
                gamePause_text.getViewTreeObserver().removeGlobalOnLayoutListener(this);
        };
        gamePause_text.getViewTreeObserver().addOnGlobalLayoutListener(asdf);
    }

Answer 2

i had exactly the same problem and also tried several aproches (as the ones mentioned above). None of them worked. However i found the following workaround:

 protected void onResume() {
   super.onResume();
   handler.postDelayed(new Runnable() {
      public void run() {
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                             WindowManager.LayoutParams.FLAG_FULLSCREEN);
      }
   }, 1000);    
 }

the view will do a short flicker in this procedure, but at least it doensn't stay croped. A clean solution still needs to be found. However this supports your thesis that there is some kind of timing or race problem.

Answer 3

Have you set FullScreen NoTitleBar in your manifest or in code? If you use code, it may be that it is getting rendered before your code kicks in?

<application android:label="@string/app_name" android:icon="@drawable/icon" android:theme="@android:style/Theme.NoTitleBar.Fullscreen">

I understand that you can set themes on individual activities in an application. Do you? and do they conflict with your application settings?

Answer 4

In my case this behavior was triggered by resume from lock screen. No idea why but after adding empty overloaded function it was fixed (but I tested it only on my HTC Wilfire). It may be a different bug thou.

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    /* Workaround a probable Android bug with fullscreen activities:
     * on resume status bar hides and black margin stays, 
     * reproducible half of the time when coming back from lock screen 
     * (tested on HTC Wildfire)
     * No idea why but this empty overload method fixed it.
     */
}

Answer 5

I Fixed it by setting the theme for application rather than for individual activities.

<application
        android:icon="@drawable/icon"
        android:installLocation="auto"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >

This worked for me. This problem occurs if the next Activity we launch isnt a Full screen Activity and current Activity is a Full screen Activity.

Answer 6

Have you tried this in onResume()?

this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                                WindowManager.LayoutParams.FLAG_FULLSCREEN );