Shortcut way for finding a view that is located inside layout of an ViewStub on Android.

BaseFragment.java

private SparseArray<View> mViewStubSparseArray;

/**
 * Find view inside ViewStub layout
 *
 * @param stubId
 * @param viewId
 * @param <T>
 * @return
 */
public <T extends View> T findLazyViewById(@IdRes int stubId, @IdRes int viewId) {
  if (mViewStubSparseArray == null) {
      mViewStubSparseArray = new SparseArray<>();
  }
  View container = getView();
  if (container == null) {
      return null;
  }
  View parent = mViewStubSparseArray.get(stubId);
  if (parent == null) {
      ViewStub stub = (ViewStub) container.findViewById(stubId);
      if (stub == null) {
          return null;
      }
      parent = stub.inflate();
      mViewStubSparseArray.put(stubId, parent);
      if (parent == null) {
          return null;
      }
  }
  return (T) parent.findViewById(viewId);
}