activity_maps.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:map="http://schemas.android.com/apk/res-auto"
             xmlns:tools="http://schemas.android.com/tools"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             tools:context="beuth.beuthmap.MapsActivity" >



    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        class="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical"
        tools:context="beuth.beuthmap.MapsActivity"
        />

    <Button
        android:id="@+id/button0"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_gravity="center_vertical"
        android:onClick="onClick0"
        android:text="0"
        />

    <Button
        android:id="@+id/button1"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_gravity=""
        android:onClick="onClick1"
        android:text="1"
        />
</FrameLayout>