Android TouchDelegate --- define View touch area

TouchDelegate is used to expand the touch area of view

final View parent = (View) delegate.getParent();
parent.post( new Runnable() { 
       public void run() { 
        final Rect r = new Rect(); 
        view.getHitRect(r); 
        r.top -= topbound;  
        r.bottom += bottombound;   
        r.left -= leftbound;  
        r.right += righttopbound;  
        parent.setTouchDelegate( new TouchDelegate( r , view)); 
      } 
});