} else if (id == R.id.locatie) { fragment = fragLocatie;
    if(!sMapFragment.isAdded()) {
        sFragmentManager.beginTransaction().add(R.id.map, sMapFragment).commit();
    }else{sFragmentManager.beginTransaction().show(sMapFragment).commit();}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true">

        <FrameLayout
            android:id="@+id/map"
            android:layout_width="match_parent"
            android:layout_height="match_parent"></FrameLayout>

    </LinearLayout>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:id="@+id/drawer_start"
    tools:context="groep2.project4.DrawerActivity"
    tools:showIn="@layout/app_bar_drawer"
    android:background="#7EC580"
    android:orientation="vertical">




    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="23">

    </FrameLayout>

</LinearLayout>