java.lang.IllegalArgumentException: parameter must be a descendant of this view Error

Question

I have a strange Error with a ViewGroup. For my main View I use classes in this links ViewFlow project

    java.lang.IllegalArgumentException: parameter must be          


        

Answer 1

I had the same issue when deleting item from recycler view which contains EditText. Just before notifying adapter that item was deleted I used

(requireContext() as Activity).currentFocus?.clearFocus()

Answer 2

Solved my problem with adding scroll listener.

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    View currentFocus = ((Activity)mContext).getCurrentFocus();
    if (currentFocus != null) {
        currentFocus.clearFocus();
    }  
}

Answer 3

This works for me.

convertView = mInflater.inflate(R.layout.row_stat_header,
                    parent, false);  

Here, parent is the ViewGroup parameter in the getView.

Answer 4

Have the same problem. I use a ViewFlow as the parent view and several GridView as child views.This error happens when I press the Home key and restart the activity again after I scrolled these child views left and right.

Here is my solution:

mViewFlow.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);

Of course, you can config it in layout.xml.

Hope that can help you.