<How to block getting focus on other element with ...

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How to block getting focus on other element with dpad when keyboard is displayed? Android tv
I have a problem, I have 2 fields in my view: EditText and Button. And the problem is, when I open keyboard on EditText(focus) and I click dpad UP the focus is changing on bottom element(Button). It happens only when keyboard is displayed. Is it possible to block it?
I would like to block it when keyboard Is displayed and use dpad only to choose keyboard elements.
I tried
android:nextFocusUp="@null"

and other nextFocuses but it works only when keyboard is not displayed.