public List
    
      getAllChildViews() {  View view = this.getWindow().getDecorView();  return getAllChildViews(view); } private List
     
       getAllChildViews(View view) {  List
      
        allchildren = new ArrayList
       
        ();  if (view instanceof ViewGroup) {   ViewGroup vp = (ViewGroup) view;   for (int i = 0; i < vp.getChildCount(); i++) {    View viewchild = vp.getChildAt(i);    allchildren.add(viewchild);    allchildren.addAll(getAllChildViews(viewchild));   }  }  return allchildren; }