TestNotify / app / src / main / res / drawable / shape_dialog_bottom.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:bottomLeftRadius="8dp"
         android:bottomRightRadius="8dp" />
    <solid android:color="#ffffff" />
</shape>