button.xml

<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:state_pressed="true"
        android:drawable="@drawable/login_pressed" />
    <item
        android:state_pressed="false"
        android:drawable="@drawable/login_release" />
</selector>