erpsuiteandroid/ApexDrivers/app/src/main/res/drawable/btn_clickable_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="true">

        <shape>

            <solid android:color="#aaaaaa"></solid>

        </shape>

    </item>

    <item android:state_pressed="false">

        <shape>

            <solid android:color="#00000000"></solid>

        </shape>

    </item>

</selector>