Develop Reference

Initializing map within fragment

I am having a problem initializing my map. The map fragment is inflated into the FrameLayout of the main activity. I keep getting a null pointer exception within the setUpMapIfNeeded() method.
activity_main.xml
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
`
<include layout="#layout/toolbar"/>
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"></FrameLayout>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_gravity="start"
app:headerLayout="#layout/header"
app:menu="#menu/drawer"
/>
</android.support.v4.widget.DrawerLayout>
map_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
tools:context=".MapFragment"
android:name="com.google.android.gms.maps.SupportMapFragment"/>
</LinearLayout>
MainActivity.java
switch (menuItem.getItemId()) {
case R.id.shop:
MapFragment mapFragment = new MapFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frameLayout,mapFragment);
fragmentTransaction.commit();
break;
case R.id.list:
ListFragment listFragment = new ListFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction1 = getSupportFragmentManager().beginTransaction();
fragmentTransaction1.replace(R.id.frameLayout,listFragment);
fragmentTransaction1.commit();
break;
case R.id.points:
Toast.makeText(getApplicationContext(),"Global card selected",Toast.LENGTH_SHORT).show();
break;
}
return true;
}
});
MapFragment.java
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.map_fragment,container,false);
//Check if GPS is enabled
locationManager = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);
if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
Toast.makeText(getContext(),"GPS enabled",Toast.LENGTH_SHORT).show();
}else {
showGPSDisabledAlertToUser();
}
setUpMapIfNeeded();
return view;
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
//I get a null pointer exception at this point, no map it gotten
mMap = ((SupportMapFragment)getActivity().getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}

Take look at my repo for mapTab here. It shows how to initial the google map for in the fragment.
Sample code:
public class MapTabFragment extends Fragment {
private SupportMapFragment mMapView;
public static MapTabFragment newInstance(String param1, String param2) {
MapTabFragment fragment = new MapTabFragment();
return fragment;
}
MapView mapView;
GoogleMap map;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_map, container, false);
// Gets the MapView from the XML layout and creates it
MapsInitializer.initialize(getActivity());
switch (GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity())) {
case ConnectionResult.SUCCESS:
Toast.makeText(getActivity(), "SUCCESS", Toast.LENGTH_SHORT).show();
mapView = (MapView) v.findViewById(R.id.map);
mapView.onCreate(savedInstanceState);
// Gets to GoogleMap from the MapView and does initialization stuff
if (mapView != null) {
map = mapView.getMap();
map.getUiSettings().setMyLocationButtonEnabled(false);
map.setMyLocationEnabled(true);
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(43.1, -87.9), 10);
map.animateCamera(cameraUpdate);
}
break;
case ConnectionResult.SERVICE_MISSING:
Toast.makeText(getActivity(), "SERVICE MISSING", Toast.LENGTH_SHORT).show();
break;
case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:
Toast.makeText(getActivity(), "UPDATE REQUIRED", Toast.LENGTH_SHORT).show();
break;
default:
Toast.makeText(getActivity(), GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity()), Toast.LENGTH_SHORT).show();
}
// Updates the location and zoom of the MapView
LatLng sydney = new LatLng(-33.867, 151.206);
map.setMyLocationEnabled(true);
map.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 13));
map.addMarker(new MarkerOptions()
.title("Sydney")
.snippet("The most populous city in Australia.")
.position(sydney));
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();
}
}
XML for this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.gms.maps.MapView
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.bojie.materialtest.fragments.UpcomingFragment"/>
</RelativeLayout>

Android google map in a Fragment

I am trying to switch fragments after login, I have MainActivity that for the first time add the LogIn Fragment to his content, after the user login, I want to switch to a Google map Fragment.
How can I create a Google Map class extending Fragment and not FragmentActivity or Activity?
Can I add FragmentActivity to the layout of the MainActivity?

/**
* Fragment that appears in the "content_frame", shows a planet
*/
public class YS_MapFragment extends Fragment {
public static final String ARG_PLANET_NUMBER = "planet_number";
public YS_MapFragment() {
// Empty constructor required for fragment subclasses
}
MarkerOptions markerOptions;
LatLng latLng;
String locationString;
MapView mapView;
GoogleMap googleMap;
private String tag = "TAG";
private String msg = "= ";
// GPSTrackerN class
GPSTracker gps;
double latitude = 0.0, longitude = 0.0;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View mainLayout = inflater.inflate(R.layout.fragment_map, container,false);
locationString = getArguments().getString("location");
latitude = getArguments().getDouble("Lat");
longitude = getArguments().getDouble("Long");
// Gets the MapView from the XML layout and creates it
mapView = (MapView) mainLayout.findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
// Gets to GoogleMap from the MapView and does initialization stuff
googleMap = mapView.getMap();
googleMap.getUiSettings().setMyLocationButtonEnabled(false);
googleMap.setMyLocationEnabled(true);
// Needs to call MapsInitializer before doing any CameraUpdateFactory
// calls
MapsInitializer.initialize(this.getActivity());
if (locationString != null && !locationString.equals(""))
{
getLocation(latitude, longitude);
} else {
getCurrentLocation();
}
return mainLayout;
}
#Override
public void onResume() {
mapView.onResume();
super.onResume();
}
#Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
#Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
}
<RelativeLayout
android:id="#+id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.google.android.gms.maps.MapView
android:id="#+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="40dip" >
</com.google.android.gms.maps.MapView>

I tried instantiating the map directly in the xml but it got me a lot of problems when trying to do more complex things with the fragments and the navigation.
The solution that gave me the best results is something like this:
1- Have an empty FrameLayout in my view's xml:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#id/color_separator" >
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:id="#+id/mapframe" />
</RelativeLayout>
2- Instantiate the SupportMapFragment in my Fragment class and add it to the FrameLayout:
if(mMapFragment==null) {
mMapFragment = SupportMapFragment.newInstance();
FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.mapframe, mMapFragment);
fragmentTransaction.commit();
}
3- Get the map asynchronically:
mMapFragment.getMapAsync(this);
(...)
#Override
public void onMapReady(GoogleMap googleMap) {
//THIS IS JUST EXAMPLE CODE; PUT WHATEVER STUFF YOU NEED HERE
mMap=googleMap;
googleMap.addMarker(new MarkerOptions().position(endLatLng).title(getString(R.string.title)));
mMapFragment.getView().setVisibility(View.GONE);
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(
new LatLng(endLatLng.latitude, endLatLng.longitude), 15);
googleMap.animateCamera(cameraUpdate);
}
This has worked perfectly for me.

Error when recalling oncreateView in TabHost + fragment in android?

I am working on a app that has 4 tabs, and 1 tab is google map.
When the user click on it , it can create the map correctly, however, if the user leave the current tab by click on other tab, and come back to this tab again, it will throw exception of error inflating layout XML.
So I log the flow, I found that in the onCreateView the second time , rootview is already create, but when I add if (rootView == null) , it still throw error of "need to removeView on child view" . How to fix that? Thanks.
public class Map extends Fragment {
// Google Map
private GoogleMap googleMap;
private boolean isShowRoute;
private Database db;
private ArrayList<Restaurant> rList;
private ArrayList<Spot> sList;
View rootView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d("test1","" + rootView);
rootView = inflater.inflate(R.layout.map, container, false);
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
Log.d("test1","b");
super.onActivityCreated(savedInstanceState);
db = new Database (getActivity());
rList = db.getRestaurant();
sList = db.getSpot();
try {
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* function to load map. If map is not created it will create it for you
* */
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getActivity().getApplicationContext(),"Sorry! unable to create maps", Toast.LENGTH_SHORT).show();
} else {
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
if (isShowRoute)
showRoute();
else
pinMap();
}
}
}
private void showRoute() {
// if (RunTracker.routePoints.size() > 1){
// Polyline route = googleMap.addPolyline(new PolylineOptions()
// .geodesic(true));
// route.setPoints(RunTracker.routePoints);
//
// LatLng lastLatLng = RunTracker.routePoints.get(RunTracker.routePoints.size() - 1);
// googleMap.addMarker(new MarkerOptions().position(lastLatLng).title("You are here"));
// googleMap.moveCamera( CameraUpdateFactory.newLatLngZoom(lastLatLng, 16.0f) );
// }
}
private void pinMap() {
for (Restaurant r : rList) {
MarkerOptions marker = new MarkerOptions().position(new LatLng(r.lat, r.lng)).title(r.name);
marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));
googleMap.addMarker(marker);
}
for (Spot s : sList) {
MarkerOptions marker = new MarkerOptions().position(new LatLng(s.lat, s.lng)).title(s.name);
marker.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
googleMap.addMarker(marker);
}
googleMap.moveCamera( CameraUpdateFactory.newLatLngZoom(new LatLng(22.3079136,114.1778376), 10.0f) ); // go to MK MTR station by default
}
#Override
public void onResume() {
super.onResume();
initilizeMap();
}
}
Log cat
03-31 14:53:56.669: E/AndroidRuntime(4611): android.view.InflateException: Binary XML file line #6: Error inflating class fragment
Caused by: java.lang.IllegalArgumentException: Binary XML file line #6: Duplicate id 0x7f050006, tag null, or parent id 0xffffffff with another fragment for com.google.android.gms.maps.MapFragment
Layout
<?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" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
Update Code:
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
db = new Database (getActivity());
if (rList == null && sList == null) {
rList = db.getRestaurant();
sList = db.getSpot();
}
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.map, container, false);
try {
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
return rootView;
}

#Override
public void onDestroyView() {
super.onDestroyView();
if (mMap != null) {
getActivity().getSupportFragmentManager().beginTransaction().remove(getActivity().getSupportFragmentManager().findFragmentById(R.id.map)).commit();
mMap = null;
}
}
The mapfragment's id must be removed from the FragmentManager
or else if the same it is passed on the next time then
app will crash

You can't add fragment inside a fragment. From Android document
Note: You cannot inflate a layout into a fragment when that layout includes a . Nested fragments are only supported when added to a fragment dynamically.
You get MapFragment from activity but after you change tab your fragment's life cycle changed, not activity. When you select tab 1 (MapFragment), it will try to get MapFragment again.
So you should try
googleMap = ((MapFragment) getChildFragmentManager().findFragmentById(R.id.map)).getMap();
or you should remove MapFragment from fragment manager of activity.
Link

user782104 is correct that solved my same problem! I'm my case i was using a fragment so its:
#Override
public void onDestroyView() {
super.onDestroyView();
if(mMap != null)
{
getFragmentManager().beginTransaction().remove(getFragmentManager().findFragmentById(R.id.mapFrag)).commit();
mMap = null;
}
}

Android Google Maps v2: on click listener not responding

I'm trying to put a marker when the user clicks on map. I'm using a SupportMapFragment inside an ActionBarActivity. But the map doesn't respond, furthermore, a map.setMapType() operation isn't working.
Here's my code:
private GoogleMap map;
private Marker marker;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ActionBarActivity activity = (ActionBarActivity) getActivity();
activity.getSupportActionBar().setTitle(R.string.select_location);
super.onCreateView(inflater, container, savedInstanceState);
return inflater.inflate(R.layout.map, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Log.d("Map","On view created");
map = getMap();
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
map.setOnMapClickListener(new OnMapClickListener() {
#Override
public void onMapClick(LatLng point) {
Log.d("Map","Map clicked");
marker.remove();
drawMarker(point);
}
});
...
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
//PLACE THE INITIAL MARKER
drawMarker(new LatLng(location.getLatitude(),location.getLongitude()));
}
}
Logcat is showing the "on view created" message and the map shows the current location with a marker, so the last part of the code is being executed. But the onMapClickListener is overrided or something because it doesn't work, and the map isn't a satellite.
Can anybody help me?

If you have extended SupportMapFragment you can simply do this:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ActionBarActivity activity = (ActionBarActivity) getActivity();
activity.getSupportActionBar().setTitle(R.string.select_location);
return super.onCreateView(inflater, container, savedInstanceState);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
map = getMap();
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
map.setOnMapClickListener(new OnMapClickListener() {
#Override
public void onMapClick(LatLng point) {
Log.d("Map","Map clicked");
marker.remove();
drawMarker(point);
}
});
Note that getMap() is called in onActivityCreated and inflater.inflate(R.layout.map, container, false) is not necessary if you don´t use a custom layout.
You don´t even need a map.xml layout!
You are extending SupportMapFragment but you are inflating another MapView (not the one tied to SupportMapFragment by default), that´s why you are not viewing the changes in your map. Because you were acting on the default View got from getMap() but you are viewing another. See the docs about getMap():
public final GoogleMap getMap ()
Gets the underlying GoogleMap that is tied to the view wrapped by this
fragment.
Hope it helps ;)

Well you are placing a listener for your map, but you need to make a listener for your markers.
map.setOnMarkerClickListener(this);
...
#Override
public boolean onMarkerClick(Marker arg0) {
Log.i(TAG,"marker arg0 = "+arg0);
return false;
}
or for the InfoWindows on top of the markers:
map.setOnInfoWindowClickListener(this);
Also, your initialitizing of map making it show satelite is almost correct:
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
change it to:
map.setMapType(GoogleMap.MAP_TYPE_HYBRID);

Instead of doing map = getMap(), a few lines later I had this code:
SupportMapFragment fm = (SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.map);
map = fm.getMap();
So I've just put the code above that line and it's done.

Instead of doing map = getMap() you can try this.
if (map == null) {
// Try to obtain the map from the SupportMapFragment.
this.map = ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.mapView))
.getMap();
setUpMap(lat, longi, R.drawable.marker2, title);
}
private void setUpMap(double lat, double lng, int drawableResource, String title) {
if(map != null) {
marker = map.addMarker(new MarkerOptions().position(new LatLng(lat, lng))
.title(title)
.icon(BitmapDescriptorFactory.fromResource(drawableResource)));
geocoder = new Geocoder(this, Locale.getDefault());
map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng), 15));
map.animateCamera(CameraUpdateFactory.zoomTo(13), 2500, null);
}
}

How to use google map V2 inside fragment?

I have a fragment which is a part of Viewpager, and I want to use Google Map V2 inside that fragment. This is what I have tried so far,
In my fragment,
private SupportMapFragment map;
private GoogleMap mMapView;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
map = (SupportMapFragment) fm.findFragmentById(R.id.map);
if (map == null) {
map = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map, map).commit();
}
}
#Override
public void onResume() {
super.onResume();
if (mMapView == null) {
mMapView = map.getMap();
Marker hamburg = mMapView.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
Marker kiel = mMapView.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.ic_launcher)));
mMapView.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
// Zoom in, animating the camera.
mMapView.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}
}
and in my layout subfragment_info.xml , I have,
<fragment
android:id="#+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_alignParentLeft="true"
android:layout_below="#+id/tableLayout1" />
I can see the map now. But the markers are not showing. I think my Google map mMapView is null. Please help me to get this problem solved. Thanks in advance.

Create a frame for map in which it will be added in your xml layout
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map_container">
<!-- The map fragments will go here -->
</RelativeLayout>
Don't include class="com.google.android.gms.maps.SupportMapFragment" in xml
either in your fragment class do get it manually inside onActivityCreated
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
fragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
if (fragment == null) {
fragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map_container, fragment).commit();
}
/***at this time google play services are not initialize so get map and add what ever you want to it in onResume() or onStart() **/
}
#Override
public void onResume() {
super.onResume();
if (map == null) {
map = fragment.getMap();
map.addMarker(new MarkerOptions().position(new LatLng(0, 0)));
}
}
if you guys face any problem Illegal State Exception Occur just write below code
/*
* This issue Is tracked in (Google Bugs)
* http://code.google.com/p/gmaps-api-issues/issues/detail?id=5064 Added
* Code Due to Illegal State Exception Occur when reclicking on tab
*
* A short-term workaround that fixed it for me is to add the following to
* onDetach() of every Fragment which you call
*/
#Override
public void onDetach() {
super.onDetach();
try {
Field childFragmentManager = Fragment.class
.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
//If you want to show map in activity just extend your Activity by //FragmentActivity write code mention below
In onCreate
FragmentManager fm = getSupportFragmentManager();
fragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
if (fragment == null) {
fragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map_container, fragment)
.commit();
}
In onResume
#Override
protected void onResume() {
super.onResume();
if (googleMap == null) {
initilizeMap();
}
}
private void initilizeMap() {
if (googleMap != null) {
googleMap = fragment.getMap();
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setRotateGesturesEnabled(true);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(latitude, longitude)).zoom(10).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
// create marker
MarkerOptions marker = new MarkerOptions().position(new LatLng(
latitude, longitude));
// ROSE color icon
marker.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_ROSE));
// adding marker
googleMap.addMarker(marker);
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
Additional help can get from these links
https://code.google.com/p/gmaps-api-issues/issues/detail?id=5064#c1
https://developers.google.com/maps/documentation/android/map

You have to decide if you create your fragment in code new SupportMapFragment() or inflate from xml class="com.google.android.gms.maps.SupportMapFragment".
Actually you cannot have a Fragment in xml for another Fragment. Read about nested Fragments.
You may follow this comment on how to add nested SupportMapFragment.

I had more or less the same problem. I had a Navigation Drawer and I wanted to put the map in a fragment.
I followed this thread (but it is in Spanish):
https://groups.google.com/forum/#!msg/desarrolladores-android/1cvqPm0EZZU/Q801Yvb2ntYJ
The clue was (in my opinion) to change the layout.xml file:
Instead of a "fragment" inside your "layout subfragment_info.xml" you would need to change to this:
<com.google.android.gms.maps.MapView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" />`
Here it is the code inside the thread (you could use it and adapt):
https://groups.google.com/d/msg/desarrolladores-android/1cvqPm0EZZU/9srw_9feamUJ

my approach is:
Bundle bundle = new Bundle();
bundle.putInt(MY_ID, id);
FragmentManager fm = getFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.customer_details_fragment);
fragment = new SalesFragment();
fm.beginTransaction()
.add(R.id.customer_details_fragment, fragment)
.commit();
fragment.setArguments(bundle);

For MapFragment
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
In your Fragment Class
map = ((MapFragment) getActivity().getFragmentManager()
.findFragmentById(R.id.map)).getMap();
map.addMarker(new MarkerOptions().position(
new LatLng(13.031902, 80.278823)).title("Marker Title"));
For SupportMapFragment
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
In your Fragment Class
map = ((SupportMapFragment) getActivity().getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
map.addMarker(new MarkerOptions().position(
new LatLng(13.031902, 80.278823)).title("Marker Title"));
Note - SupportMapFragment map render once user touchs the map

In link , answer for you:
"The problem is that what you are trying to do shouldn't be done. You shouldn't be inflating fragments inside other fragments. From Android's documentation:
Note: You cannot inflate a layout into a fragment when that layout includes a . Nested fragments are only supported when added to a fragment dynamically.
While you may be able to accomplish the task with the hacks presented here, I highly suggest you don't do it. Its impossible to be sure that these hacks will handle what each new Android OS does when you try to inflate a layout for a fragment containing another fragment.
The only Android-supported way to add a fragment to another fragment is via a transaction from the child fragment manager."
For this problem:
Duplicate ID, tag null, or parent id with another fragment for com.google.android.gms.maps.MapFragment
For me, the best solution are of #DeepakPanwar

For Load map into fragment:
<fragment
android:id="#+id/fragmentMap1"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
For .java:
public class PathFragment extends Fragment {
View view;
GoogleMap mMap;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view=inflater.inflate(R.layout.fragment_path,null);
setupMap();
return view;
}
private void setupMap()
{
if (mMap == null)
{
mMap = ((SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.fragment_map1)).getMap();
mMap.getUiSettings().setZoomControlsEnabled(true);
}
mMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
#Override
public void onMapLoaded() {
getlocation();
}
});
}
public void getlocation()
{
try
{
/*Collect Source and destination latitude and longitude
* To draw Polyline
* */
LatLng src = new LatLng(Double.parseDouble(AppGlobal.WorkerHistory.getOrder_lat()),Double.parseDouble(AppGlobal.WorkerHistory.getOrder_lng()));
LatLng dest =new LatLng(Double.parseDouble(AppGlobal.WorkerHistory.getWorker_lat()),Double.parseDouble(AppGlobal.WorkerHistory.getWorker_lng()));
//Add Marker
mMap.addMarker(new MarkerOptions()
.position(src)
.title("Source")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.srcicon)));
mMap.addMarker(new MarkerOptions()
.position(dest)
.title("Destination")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.desticon)));
Polyline line = mMap.addPolyline(
new PolylineOptions().add(
new LatLng(src.latitude, src.longitude),
new LatLng(dest.latitude, dest.longitude)
).width(5).color(Color.RED).geodesic(true)
);
//set zoom level
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(src);
builder.include(dest);
LatLngBounds bounds = builder.build();
int padding = 0; // offset from edges of the map in pixels
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
mMap.animateCamera(cu);
}
catch (Exception e)
{
e.printStackTrace();
}
}
}

This is how I did it
in layout:
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight=".90"
class="com.google.android.gms.maps.SupportMapFragment"
/>
in code:
public class GPS extends FragmentActivity {
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (supportMap == null) {
// Try to obtain the map from the SupportMapFragment.
supportMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (supportMap != null) {
MarkerOptions mo = new MarkerOptions().position( new LatLng( latitude, longitude ) );
supportMap.addMarker( mo );
}
}
}
}
Took me a lot of fiddling, you need just the right combination of things, make sure your class extends FragmentActivity

If I replace the fragment, where the map fragment is in (in this code example MyFragment) with a different fragment and then come back, I get an IllegalStateException
public class Home_Map extends Fragment {
GoogleMap googleMap;
FragmentManager myFragmentManager;
SupportMapFragment mySupportMapFragment;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View rootView = inflater.inflate(R.layout.fragment_home__map, container, false);
//googleMap.setMyLocationEnabled(true);
try {
// Loading map
initilizeMap();
googleMap.setMyLocationEnabled(true);
} catch (Exception e) {
e.printStackTrace();
}
return rootView;
}
private void initilizeMap() {
try
{
if (googleMap == null) {
myFragmentManager = getFragmentManager();
mySupportMapFragment = (SupportMapFragment)myFragmentManager.findFragmentById(R.id.map2);
googleMap = mySupportMapFragment.getMap();
if (googleMap == null) {
Toast.makeText(getActivity().getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
} catch (Exception e) { Toast.makeText(getActivity().getApplicationContext(), ""+e, 1).show();
// TODO: handle exception
}
}
#Override
public void onResume() {
super.onResume();
initilizeMap();
}
#Override
public void onDetach() {
// TODO Auto-generated method stub
super.onDetach();
try {
Field childFragmentManager = Fragment.class
.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}