查找相同ID，TAG的元素

private static ArrayList<View> getViewsByTag(ViewGroup root, String tag){
   ArrayList<View> views = new ArrayList<View>();
   final int childCount = root.getChildCount();
   for (int i = 0; i < childCount; i++) {
       final View child = root.getChildAt(i);
       if (child instanceof ViewGroup) {
           views.addAll(getViewsByTag((ViewGroup) child, tag));
       } 


       final Object tagObj = child.getTag();
       if (tagObj != null && tagObj.equals(tag)) {
           views.add(child);
       }


   }
   return views;

}

ArrayList<View> vs=getViewsByTag((ViewGroup) view,"tv_old_price");
for(int i=0;i<vs.size();i++)
((TextView) vs.get(i)).getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);