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

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.