public void addTintResourceId(int resId){
  if (mCustomTintDrawableIds == null)   mCustomTintDrawableIds=new ArrayList<Integer>();
  mCustomTintDrawableIds.add(resId);
}

public void addTintResourceId ( int resId ) { if ( mCustomTintDrawableIds == null ) mCustomTintDrawableIds = new ArrayList < Integer > ( ) ; mCustomTintDrawableIds . add ( resId ) ; }
add a drawable resource to which to apply the " tint " technique .
