Android - how to find multiple views with common attribute

Question

I have a layout with multiple ImageViews, some of those images need to have the same onClickListener. I would like my code to be flexible and to be able to get

Answer 1

I've finally wrote this method (Updated thanks to @SuitUp (corrected username)):

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;
}

It will return all views that have android:tag="TAG_NAME" attribute. Enjoy ;)

Answer 2

There is no such method as findViewById that returns a group of views, but you can iterate over your views and set them an onClickListener like this:

for (int i = 0;i < layout.getChildCount();i++) {
  View child = layout.getChildAt(i);
  //you can check for view tag or something to see if it satisfies your criteria
  //child.setOnClickListener...
}

UPD: For recursive view hierarchy (this is example from a real project, where we do view refresh recursively, but instead you could just do whatever you want with the nested views):

private void recursiveViewRefresh(ViewGroup view) {
    for (int i = 0;i < view.getChildCount();i++) {
        View child = view.getChildAt(i);
        try {
            ViewGroup viewGroup = (ViewGroup) child;
            recursiveViewRefresh(viewGroup);
        } catch (ClassCastException e) {
            //just ignore the exception - it is used as a check
        }
        singleViewRefresh(child);
    }
}