How to add MapView and other component in a LinearLayout?

I have seen many related questions but I can not spot where I am doing it wrong. I appreciate if anyone can help me. When I add only one MapView to the LinearLayout, map is working fine. But when I try to add one button or textView or anything in the layout it crashes in run time!

I have three separate fragments. First one is called FragmentA.java and Fragment_a.xml

Here is Fragment_a.xml file:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <com.google.android.maps.MapView android:id="@+id/mapView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
    />
    <Button android:id="@+id/googlemaps_select_location"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Select"
    />
</RelativeLayout>

And here is

FragmentA.java

I am not sure if

        View v = inflater.inflate(R.layout.fragment_a, container, false);

is correct. fragment_a, as I said is the name of the fragment which contain complete view:

public class FragmentA  extends Fragment {

        MapView mapView;
        GoogleMap map;

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.fragment_a, container, false);

            // Gets the MapView from the XML layout and creates it
            mapView = (MapView) v.findViewById(R.id.mapView);
            mapView.onCreate(savedInstanceState);

            // Gets to GoogleMap from the MapView and does initialization stuff
            map = mapView.getMap();
            map.getUiSettings().setMyLocationButtonEnabled(false);
            map.setMyLocationEnabled(true);

            MapsInitializer.initialize(this.getActivity());

            // Updates the location and zoom of the MapView
            CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(43.1, -87.9), 10);
            map.animateCamera(cameraUpdate);

            return v;
        }

        @Override
        public void onResume() {
            mapView.onResume();
            super.onResume();
        }

        @Override
        public void onDestroy() {
            super.onDestroy();
            mapView.onDestroy();
        }

        @Override
        public void onLowMemory() {
            super.onLowMemory();
            mapView.onLowMemory();
        }

I got the error which says, inflate exception binary xml file line #10 error inflating class fragment.

As I said I have seen many example such as this which was accepted answer but did not work for me: I am not sure why I am not using Layout base in my above code in following xml file. which is strange.

<RelativeLayout
    xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:id="@+id/base">

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:id="@+id/editText"
        >
    </EditText>
    <LinearLayout
        android:id="@+id/linearLayout1"
        android:gravity="bottom"
        android:layout_width="fill_parent"
        android:orientation="horizontal"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:layout_alignParentBottom="true">
        <Button
            android:text="Cancel"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:layout_weight="1"></Button>
        <Button
            android:text="Confirm"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:layout_weight="1"></Button>
    </LinearLayout>

    <com.google.android.maps.MapView
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:enabled="true"
        android:clickable="true"
        android:apiKey="0HD__0DaIgzDb8nHjJsuggkHlW1MofMwg-xVCpA" 
        android:layout_below="@+id/editText"
        android:layout_above="@+id/linearLayout1"/>
</RelativeLayout>

Finally as I said this is working fine for me with no problem but when I add another element it fails:

<LinearLayout xmlns:android="http://ift.tt/nIICcg"
    xmlns:tools="http://ift.tt/LrGmb4"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >
        <com.google.android.gms.maps.MapView android:id="@+id/mapView"
            android:layout_width="match_parent" 
            android:layout_height="wrap_content"
        />

</LinearLayout>

As you can see in second one, I need a textEdit on top then map and down is two buttons. Thanks in advance.