How to add MapFragment inside a Fragment Android

fragment_content.xml

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:background="@color/colorPrimary">

    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.MapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

FragmentClass.java

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    MapFragment mapFragment = (MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}

@Override
    public void onMapReady(GoogleMap map) {
        googleMap = map;

        if(location_live != null) {
            LatLng latLng = new LatLng(location_live.getLatitude(), location_live.getLongitude());
            googleMap.addMarker(new MarkerOptions().position(latLng)
                    .title("Marker in Sydney"));
            googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        }
    }