@Override
 public View findViewById(int id) {
   View v = super.findViewById(id);
   if (v == null && mSwipeBackLayout != null) {
     v = mSwipeBackLayout.findViewById(id);
   }
   return v;
 }
 public View findViewById(int id) {
   if (mSwipeBackLayout != null) {
     return mSwipeBackLayout.findViewById(id);
   }
   return null;
 }