Detect current window size for Samsung Multi-Window system

gistfile1.txt

mRootContainer = (RelativeLayout) findViewById(R.id.root_container);
ViewTreeObserver vto = mRootContainer.getViewTreeObserver();

vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    // get current window size
    int newWidth  = mRootContainer.getWidth();	
    int newHeight = mRootContainer.getHeight();		        

    // do whatever you want ...
  }  
});