android:minHeight="0dp"
*** In layout_height is not work in Button in Android Studio.
*** You can use:
PaddingTop and PaddingBottom in Button that give you the button height increase.
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<Button
android:text="Button"
android:paddingTop="40dp"
android:paddingBottom="40dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>