stackoverflow_28632372

appbar.xml

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
    
    <android.support.v7.widget.Toolbar
        android:id="@+id/appbar"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:minHeight="?attr/actionBarSize"
        android:elevation="6dp"
        ....
        />
    
    <ImageView
        android:id="@+id/notif_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:elevation="6dp" 
        android:src="@drawable/....."
        
        android:layout_marginLeft="..dp"
        android:layout_marginTop="..dp"
        />
        
</RelativeLayout>

Position the notif_icon with the layout_margin left and top values to get it into the position that you want above the hamburger icon