Android layout overlap buttons on bottom of each other

Question

I want to overlap buttons on bottom of layout, like this:

How to do it in android studio?

Answer 1

I do it by minus padding on parent RelativeLayout like this:

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/loading1"
    android:layout_marginBottom="-34dp"
    android:background="@drawable/alert">