android:button="@null" doesn't work on lower API <= 19 devices

Issue

I updated the version of the androidx.appcompat:appcompat to 1.1.0-alpha01 for use new features. But after the update, the android:button="@null" with the RadioButton stopped working on devices lower API 19 and doesn't delete the default radio icon. Any solutions ?

Solution

In my case worked only with both

        android:button="@null"
        app:buttonCompat = "@null"

attributes set to @null

Answered By - Zoran