I have a ViewPager2 on my Android App. One of the pages contains an EditText field.
The scenario I encountered is as follows:
- Set focus on the text field -> keyboard shows
- Switch to another page -> keyboard dismisses (the field lost focus)
- Go back to the previous tab and set focus on the text field again -> the field will gain focus but immediately the focus would clear. Tapping on the field again will get the focus back.
I prepared a small demo app to demonstrate this issue: https://github.com/hilaza/SwitchTabsBugDemo
I debugged it and what I found was that the ViewPager clears the focus from my page, thinking that a page was selected. Debugging it further I saw that it has something to do with the RecyclerView's didChildRangeChange method which wrongly assumes that something has changed.
Does anyone happen to know why it's happening and what can I do to work around this?