Show toolbar above google map

Question

I am having troubles in putting a toolbar above the google map.

I followed a online indication, but when I launch the code I am not able to see the toolbar.

<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"
android:orientation="vertical">

<android.support.v7.widget.Toolbar
    xmlns:sothree="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/app_bar"
    android:layout="@layout/toolbar"
    android:layout_height="match_parent"
    android:layout_width="match_parent"/>

<fragment
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:id="@+id/map"
    android:layout_below="@+id/app_bar"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.namexxx.app.homemap"
/>

</FrameLayout>

Answer 1

I corrected the code based on JPCrow inputs:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/SecondaryBackground"
tools:context="com.example.filippo.xxx.MainActivity"
>


<include android:id="@+id/app_bar" layout="@layout/toolbar"/>


<fragment
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:id="@+id/map"
    android:layout_below="@+id/app_bar"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.filippo.xxx.homemap"
/>

</RelativeLayout>

Now it works. Thanks.