A utility to dump the Android view hierarchy and detect duplicate resource IDs in the hierarchy

ViewUtils.java

public class ViewUtils {
  private static final String TAG = "ViewUtils";

  public static void dumpViewHierarchy(ViewGroup root) {
    final Set<String> visitedResNames = new HashSet<>();
    walkNode(root, root.getResources(), visitedResNames);
  }

  private static void walkNode(ViewGroup node, Resources resources, Set<String> visitedResNames) {
    final String resName = getResourceName(node.getId(), resources);
    Log.d(TAG, "Type: " + node.getClass().getSimpleName() + "\t\tRes ID: " + resName);
    if (isDuplicate(resName, visitedResNames)) {
      Log.w(TAG, "Res ID: " + resName + " is duplicate");
    }

    final int childCount = node.getChildCount();
    for (int i = 0; i < childCount; i++) {
      View child = node.getChildAt(i);
      if (child instanceof ViewGroup) {
        walkNode((ViewGroup) child, resources, visitedResNames);
      } else {
        final String childResName = getResourceName(child.getId(), resources);
        Log.d(TAG, "Type: " + child.getClass().getSimpleName() + "\t\tRes ID: " + childResName);
        if (isDuplicate(resName, visitedResNames)) {
          isDuplicate(childResName, visitedResNames);
        }
      }
    }
  }

  private static String getResourceName(int resId, Resources res) {
    try {
      return res.getResourceEntryName(resId);
    } catch (Resources.NotFoundException e) {
      return "";
    }
  }

  private static boolean isDuplicate(String resName, Set<String> resources) {
    return !TextUtils.isEmpty(resName) && !resources.add(resName);
  }
}