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

Question

Users are getting the following exception in my app on certain phones. I tried reproducing the error myself but couldn\'t . I searched through stack overflow for similar problem

Answer 1

I was also getting the same error when Google TalkBack is turned on. In my case, I was inflating a view with the boolean attachToParent true.So by making it false worked for me.

Answer 2

I have append on scroll listener in ScrollView and solve problem

 lst_payment_info.setOnScrollListener(new AbsListView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(AbsListView view, int scrollState) {
            if (SCROLL_STATE_TOUCH_SCROLL == scrollState) {
                View currentFocus = getCurrentFocus();
                if (currentFocus != null) {
                    currentFocus.clearFocus();
                }
            }
        }

        @Override
        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

        }
    });

Answer 3

The problem was caused by adding a wrongly inflated header to two different listviews.

I inflated a view using listViewA as the parent and adding it to listViewB also. As such:

RelativeLayout listViewHeader = (RelativeLayout) inflater.inflate(R.layout.listviewheader, listViewA, false);

// Set some views

listViewA.addHeaderView(listViewHeader);
listViewB.addHeaderView(listViewHeader);

I fixed it by changing the above to the following:

RelativeLayout listViewHeaderA = (RelativeLayout) inflater.inflate(R.layout.listviewheader, listViewA, false);
RelativeLayout listViewHeaderB = (RelativeLayout) inflater.inflate(R.layout.listviewheader, listViewB, false);

listViewA.addHeaderView(listViewHeaderA);
listViewB.addHeaderView(listViewHeaderB);

As for reproducing the crash, the problem happened when Google Talk Back is turned on. Here is my take on the situation: Google Talk Back does text to speech on views that are in focus (either by touch or auto-focused). When it enters a screen with multiple views requesting focus, it reads the views according to a hierarchy/order.

If you have a layout (parent) with three views (children), Google Talk Back checks how the views are arranged and then reads them accordingly. For example, in a layout with three textview lined up horizontally, Google Talk Back may read the left textview first, then the middle one, then the one on the right.

In my case, I was inflating a header view with listViewA as the parent and adding that view to both listViewA and listViewB. When listViewBgains focus and Google Talk Back tries to interpret its children, it sees the header view is not a child of the list and throws the exception. This also happens if I inflate the header view with no parents (null).