Develop Reference

How can I get current location google map in a fragment using view pager?

I would like guidance on how to properly implement a google map in a view pager. I have done so in an activity and have no problems producing a map in a activity but when trying to do the same with a view pager I am not having much success.
I have found this question that asks something similar but trying it out leads me to an error that I can't resolve: How to put Google Maps V2 on a Fragment using ViewPager
I updated get map to get map Async following this guide: Replace getMap with getMapAsync.
However I am still no close to getting a google map to display in my view pager. I am uncertain as where else to go to for tutorials. I have found plenty of tutorials on how to get a map to show in an activity but none on how to get it to show with a view pager. Unable to find any guides on the subject relating to view pagers inside of maps.
I am currently unable to display a map in my fragment google map resources fragment.
If there are any resources or tutorials I can be provided that are up to date feel free to share them, I am currently unable to find a solution on my own.
Any ideas would be appreciated.
public Class MainActivity extends AppCompatActivity implements OnMapReadyCallback{
private GoogleMap googleMap;
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
//The adapter adds the fragments created to the view so it can be seen by the user
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new SucessfullFosterYouthFragment(), "Sucessfull Foster Youth");
adapter.addFragment(new ContactusFragment(), "Contact US");
adapter.addFragment(new GoogleMapResourcesFragment(), "resources");
viewPager.setAdapter(adapter);
}
#Override
public void onMapReady(GoogleMap googleMap) {
MapFragment mapFragment = (MapFragment) getFragmentManager()
.findFragmentById(R.id.googlemap);
mapFragment.getMapAsync(this);
}
public void setUpMap() {
googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
googleMap.setMyLocationEnabled(true);
googleMap.setTrafficEnabled(true);
googleMap.setIndoorEnabled(true);
googleMap.setBuildingsEnabled(true);
googleMap.getUiSettings().setZoomControlsEnabled(true);
}
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
public class GoogleMapResourcesFragment extends Fragment{
MapView mMapView;
private GoogleMap googleMap;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// inflat and return the layout
View v = inflater.inflate(R.layout.fragment_googlemapresources, container,
false);
mMapView = (MapView) v.findViewById(R.id.googlemap);
mMapView.onCreate(savedInstanceState);
mMapView.onResume();// needed to get the map to display immediately
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
// latitude and longitude
double latitude = 17.385044;
double longitude = 78.486671;
// create marker
MarkerOptions marker = new MarkerOptions().position(
new LatLng(latitude, longitude)).title("Hello Maps");
// Changing marker icon
marker.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_ROSE));
// adding marker
googleMap.addMarker(marker);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(17.385044, 78.486671)).zoom(12).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
// Perform any camera updates here
return v;
}
#Override
public void onResume() {
super.onResume();
mMapView.onResume();
}
#Override
public void onPause() {
super.onPause();
mMapView.onPause();
}
#Override
public void onDestroy() {
super.onDestroy();
mMapView.onDestroy();
}
#Override
public void onLowMemory() {
super.onLowMemory();
mMapView.onLowMemory();
}
}

You should use MapView here as well instead of MapFragment:
MapFragment mapFragment = (MapFragment) getFragmentManager()
.findFragmentById(R.id.googlemap);
mapFragment.getMapAsync(this);
Try this example below:
public class SomeFragment extends Fragment {
MapView mapView;
GoogleMap map;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.some_layout, 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);
// Needs to call MapsInitializer before doing any CameraUpdateFactory calls
try {
MapsInitializer.initialize(this.getActivity());
} catch (GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
// 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();
}
}
Layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.google.android.gms.maps.MapView android:id="#+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>

Google Maps looks like an image

I have two Google Maps in my application, which I have implemented in the same way. One is working and one is not. The latter looks like an image and I can't interact with it. I can add markers and move the camera, but the info window doesn't show when I click the marker I can't move it, zoom in and zoom out. It looks like an image, a preview.
Here is the code:
public class MapFragment extends Fragment implements OnMapReadyCallback{
private GoogleMap mMap;
private static Double latitude;
private static Double longitude;
private static String title;
public static MapFragment newInstance(Double mLatitude, Double mLongitude, String mTitle) {
latitude=mLatitude;
longitude=mLongitude;
title=mTitle;
MapFragment fragment = new MapFragment();
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_map, container, false);
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.map_details);
mapFragment.getMapAsync(this);
return view;
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.getUiSettings().setAllGesturesEnabled(true);
mMap.getUiSettings().setMapToolbarEnabled(false);
mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.location_icon))
.position(new LatLng(latitude, longitude))
.title(title));
CameraPosition cameraPosition = new CameraPosition.Builder().target(new LatLng(latitude,longitude)).zoom(12f).build();
CameraUpdate cameraUpdate = CameraUpdateFactory.newCameraPosition(cameraPosition);
mMap.moveCamera(cameraUpdate);
}
public interface OnMapFragmentInteractionListener {
void onMapFragmentInteraction(Uri uri);
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onPause() {
super.onPause();
}
#Override
public void onDestroy() {
super.onDestroy();
}
#Override
public void onLowMemory() {
super.onLowMemory();
}
}

You should take a look at XML. There is liteMode and when it's set to true it does exactly what you are describing.
<com.google.android.gms.maps.MapView
android:id="#+id/row_map"
android:layout_width="match_parent"
android:layout_height="match_parent"
map:liteMode="true"
map:mapType="none" />
Here look at documentation

I'm just guessing but in code that you posted i see one mistake. To be sure you have to check your imports in the place when you try to use your MapFragment. As I said I guess that in one place it's imported from google pacage and another one from your class. The problem is that the MapFragment that you post here isn't a google MapFragment because you extants it from simple Fragment. To be sure rename your own MapFragment to CustomMapFragment and try to extands from MapFragment or just use it without customize.

Toggle between MapFragment and ListFragment

I am creating an App where I want to switch between my CustomMapFragment and a ListFragment. If I start the App and call replaceFragment:
private void replaceFragment(final Fragment fragment) {
final FragmentManager fragmentManager = mActivity.getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.main_content_frame, fragment)
.commit();
}
with replaceFragment(new CustomMapFragment()) the Map looks like it should.
The CustomMapFragment is a Fragment where I replace a FrameLayout with the native MapFragment, to have it separated from the code.
If I call the replace method again on button click or something, with a different Fragment (the ListFragment for example), the FrameLayout gets replaced with this, everything is fine.
If I now try to replace it again with the CustomMapFragment, the exact same call like on the beginning, the Map is loaded but it is missing every Marker and every Setting I have done in the CustomMapFragment.
CustomMapFragment:
public class CustomMapFragment extends BaseFragment {
private static final String LOG_TAG = PosMapFragment.class.getSimpleName();
private MapFragment mMapFragment;
private GoogleMap mMap;
private ImageLoader mImageLoader;
private Context mContext;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = getActivity();
final RequestQueue reqQueue = Volley.newRequestQueue(mContext);
mImageLoader = new ImageLoader(reqQueue, new BitmapLruCache(mContext));
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.maps_fragment, container, false);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mMapFragment = MapFragment.newInstance();
replaceFragment(mMapFragment);
}
private void postMapInitialisation() {
new View(getActivity()).post(new Runnable() {
#Override
public void run() {
addTestMarker(0, 0, "http://www.jimis-cyberstore.com/store/media/gp_batman_tshirts.jpg");
addTestMarker(10, 10, "http://img.netzwelt.de/software/icons/2012/8842/android-sdk.png");
addTestMarker(50, 50, "http://fs02.androidpit.info/ali/x84/4053084-1374511678988-80x80.png");
addTestMarker(5, 0, "http://im.wk.io/images/77e3e40/kitkat-chromium-ubernimmt-in-android.jpeg");
addTestMarker(0, 10, "http://www.mchme.de/cms/kategorien/18_Software/dateien/fb_logo_80.jpg");
addTestMarker(15, 5, "http://navigator.ptvgroup.com/uploads/pics/PTV_Navigator_Android_Windows2_80x80px_01.png");
}
});
}
#Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
postMapInitialisation();
EventBusProvider.getInstance().register(this);
}
private void replaceFragment(final Fragment fragment) {
final FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.maps, fragment)
.commit();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
mMap = mMapFragment.getMap();
if (mMap != null) {
mMap.setMyLocationEnabled(true);
mMap.setInfoWindowAdapter(this);
mMap.setOnInfoWindowClickListener(this);
}
}
}
private void addTestMarker(final double lat, final double lng, String url){
if(mMap != null){
final NetworkImageMarker networkImageMarker = new NetworkImageMarker(mContext, url);
final Marker marker = mMap.addMarker(networkImageMarker.getMarkerOptions(lat, lng, mImageLoader));
networkImageMarker.setMarker(marker);
networkImageMarker.setReloadListener(new OnReloadListener() {
#Override
public void reAddNetworkImageMarker(Bitmap bitmap) {
mMap.addMarker(networkImageMarker.getMarkerOptions(lat, lng, bitmap));
}
});
}
}
#Subscribe
public void onLocationChanged(final LocationChangedEvent event) {
centerMap(event.mLocation);
}
private void centerMap(Location location){
double latitude = location.getLatitude();
double longitude = location.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
centerMapAtLocation(latLng);
}
private void centerMapAtLocation(LatLng location) {
mMap.moveCamera(CameraUpdateFactory.newLatLng(location));
mMap.animateCamera(CameraUpdateFactory.zoomTo(14));
}
}
The main layout is just a FrameLayout, which get replaced for different Fragments. I also tried to load just one Fragment where the CustomMapFragment and the ListFragment are loaded at the same time, with two FrameLayouts, so they are stacked over each other, but it ends up in the same behavior.
It seems there is something wrong with the MapFragment (not the SupportMapFragment).
loading MapFragment at the beginning = MapFragment looks perfect
MapFragment -> ListFragment -> MapFragment = MapFragment is an empty Map
ListFragment -> MapFragment = MapFragment is an empty Map
MapFragment -> MapFragment = MapFragment is an empty Map

Because you are trying to replace fragments inside of another fragment, you should use getChildFragmentManager() instead of getFragmentManager() in your replace method.
private void replaceFragment(final Fragment fragment) {
final FragmentManager fragmentManager = getChildFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.maps, fragment)
.commit();
}
Unfortunately getChildFragmentManager() is only supported for api lvl >= 17, so you will probably have to use the android-support-v4 library.

android GoogleMap is null, displays fine but can't add markers/polylines

I have a GoogleMap which displays fine (within a SupportMapFragment) and uses the GoogleMapOptions for the target camera location. However, I am unable to add markers/polylines to the GoogleMap. Here is the method for creating the map:
private void createMap(List<LatLng> latLngs) {
if(map == null) {
GoogleMapOptions options = new GoogleMapOptions();
mapFragment = SupportMapFragment.newInstance(options);
map = mapFragment.getMap();
float zoom = 13;
CameraPosition cameraP = new CameraPosition(latLngs.get(0), zoom, 0, 0);
options.camera(cameraP);
//TODO MAP IS NULL - SORT OUT!
// check it has been instantiated
if (map != null) {
Log.d(TAG, "map is not null");
map.clear();
//Calculate target zoom, based on trip size
map.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraP));
// Add LatLngs to polyline
PolylineOptions poly = new PolylineOptions().color(Color.RED);
MarkerOptions startMarker = new MarkerOptions()
.position(latLngs.get(0)).title("Start");
MarkerOptions endMarker = null;
if(latLngs.size() > 1) {
endMarker = new MarkerOptions().position(
latLngs.get(latLngs.size() - 1)).title("End");
}
for (LatLng latLng : latLngs) {
poly.add(latLng);
}
map.addPolyline(poly);
map.addMarker(startMarker);
map.addMarker(endMarker);
}
ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.trip_summary_map_container, mapFragment);
ft.commit();
}
}
As you can see from the inline comments, the map is still null (although it is displaying and using the options). Just can't add things to it. I assume I am not instantiating it properly?
The Activity extends FragmentActivity, and I have set up all the necessary stuff for using the Maps API.
Thank you for any help.

EDIT: I have posted a new answer with the solution I prefer to use now.
I had the same problem some days ago and I solved it extending SupportMapFragment class so that it executes a callback method once the map is finally ready.
public class ExtendedSupportMapFragment extends SupportMapFragment {
public static interface MapReadyListener {
public void mapIsReady(GoogleMap map);
}
#Deprecated
public static SupportMapFragment newInstance() {
return null;
}
#Deprecated
public static SupportMapFragment newInstance(GoogleMapOptions options) {
return null;
}
public static ExtendedSupportMapFragment newInstance(MapReadyListener mapReadyListener) {
ExtendedSupportMapFragment fragment = new ExtendedSupportMapFragment();
fragment.mapReadyListener = mapReadyListener;
return fragment;
}
private MapReadyListener mapReadyListener;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (mapReadyListener != null)
mapReadyListener.mapIsReady(getMap());
}
}
Then you just need to do something like this:
public class RutaMapaFragment extends SherlockFragment implements ExtendedSupportMapFragment.MapReadyListener {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
fragmentMapa = ExtendedSupportMapFragment.newInstance(RutaMapaFragment.this);
}
...
#Override
public void mapIsReady(GoogleMap map) {
//Do whatever you want with your map.
}
}

So, time has passed and all. The fact is that I don't use the solution in my previous answer anymore, but prefer to use a ViewTreeObserver instead. The following code shows a rather simple fragment with a SupportMapFragment being added to it.
The method createMap() adds the SupportMapFragment and then executes setupMap(), but only via a OnGlobalLayoutListener that will basically be executed once the map is actually ready. Of course, this listener is removed immediately—there's no need to keep it there any longer.
public class MyMapFragment extends Fragment {
private View mMapContainer;
private SupportMapFragment mMapFragment;
private GoogleMap mMap;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(/* ... */);
// ...
mMapContainer = view.findViewById(R.id.map_fragment_container);
createMap();
return view;
}
private void createMap() {
mMapFragment = new SupportMapFragment();
getFragmentManager().beginTransaction()
.replace(R.id.map_fragment_container, mMapFragment)
.commit();
mMapContainer.getViewTreeObserver()
.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#TargetApi(Build.VERSION_CODES.JELLY_BEAN)
#Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN) {
mMapContainer.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
mMapContainer.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
mMap = mMapFragment.getMap();
setupMap();
}
});
}
private void setupMap() {
mMap.setMyLocationEnabled(true);
// ...
}
}

Try to add the Marker & PolyLines in the map using below code:
GoogleMap mMap;
static final CameraPosition BONDI =
new CameraPosition.Builder().target(new LatLng(-33.891614, 151.276417))
.zoom(15.5f)
.bearing(300)
.tilt(50)
.build();
changeCamera(CameraUpdateFactory.newCameraPosition(BONDI));
mMap.addMarker(new MarkerOptions().position(new LatLng(-33.891614, 151.276417)).title("Bondi"));
private void changeCamera(CameraUpdate update) {
changeCamera(update, null);
}
/**
* Change the camera position by moving or animating the camera depending on the state of the
* animate toggle button.
*/
private void changeCamera(CameraUpdate update, CancelableCallback callback) {
boolean animated = ((CompoundButton) findViewById(R.id.animate)).isChecked();
if (animated) {
mMap.animateCamera(update, callback);
} else {
mMap.moveCamera(update);
}
}
Add the PolyLines as below:
// A simple polyline with the default options from Melbourne-Adelaide-Perth.
mMap.addPolyline((new PolylineOptions())
.add(BONDI));

Initialize MapFragment programmatically with Maps API v2

I'm trying to add a MapFragment to my current Fragment. The use of nested fragments is restricted to FragmentTransactions, you can't use the xml tag in your layout.
Also, I want it to be added to the main Fragment when the user presses a button. So, I'm creating the MapFragment programmatically with getInstance() when the user presses that button and adding it to the proper place. It is shown correctly, so far so good.
The problem is that after attaching the MapFragment I need to get a reference to GoogleMap to place a Marker, but the getMap() method returns null (as the fragment's onCreateView() hasn't been called yet).
I looked at the demo example code and I found the solution they use is initializing the MapFragment in onCreate() and getting the reference to GoogleMap in onResume(), after onCreateView() has been called.
I need to get the reference to GoogleMap right after the MapFragment initialization, because I want the users to be able to show or hide the map with a button. I know a possible solution would be to create the Map at the start as said above and just set it's visibility gone, but I want the map to be off by default so it doesn't take the user's bandwidth if they don't explicitly asked for it.
I tried with the MapsInitializer, but doesn't work either. I'm kind of stuck. Any ideas?
Here is my testing code so far:
public class ParadaInfoFragment extends BaseDBFragment {
// BaseDBFragment is just a SherlockFragment with custom utility methods.
private static final String MAP_FRAGMENT_TAG = "map";
private GoogleMap mMap;
private SupportMapFragment mMapFragment;
private TextView mToggleMapa;
private boolean isMapVisible = false;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_parada_info, container, false);
mToggleMapa = (TextView) v.findViewById(R.id.parada_info_map_button);
return v;
}
#Override
public void onStart() {
super.onStart();
mToggleMapa.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (!isMapVisible) {
openMap();
} else {
closeMap();
}
isMapVisible = !isMapVisible;
}
});
}
private void openMap() {
// Creates initial configuration for the map
GoogleMapOptions options = new GoogleMapOptions().camera(CameraPosition.fromLatLngZoom(new LatLng(37.4005502611301, -5.98233461380005), 16))
.compassEnabled(false).mapType(GoogleMap.MAP_TYPE_NORMAL).rotateGesturesEnabled(false).scrollGesturesEnabled(false).tiltGesturesEnabled(false)
.zoomControlsEnabled(false).zoomGesturesEnabled(false);
// Modified from the sample code:
// It isn't possible to set a fragment's id programmatically so we set a
// tag instead and search for it using that.
mMapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentByTag(MAP_FRAGMENT_TAG);
// We only create a fragment if it doesn't already exist.
if (mMapFragment == null) {
// To programmatically add the map, we first create a
// SupportMapFragment.
mMapFragment = SupportMapFragment.newInstance(options);
// Then we add it using a FragmentTransaction.
FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.parada_info_map_container, mMapFragment, MAP_FRAGMENT_TAG);
fragmentTransaction.commit();
}
// We can't be guaranteed that the map is available because Google Play
// services might not be available.
setUpMapIfNeeded(); //XXX Here, getMap() returns null so the Marker can't be added
// The map is shown with the previous options.
}
private void closeMap() {
FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();
fragmentTransaction.remove(mMapFragment);
fragmentTransaction.commit();
}
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.
mMap = mMapFragment.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
mMap.addMarker(new MarkerOptions().position(new LatLng(37.4005502611301, -5.98233461380005)).title("Marker"));
}
}
}
}
Thanks

The good AnderWebs gave me an answer in Google+ but he is too laz.... emm busy to write it here again, so here is the short version:
Extend the MapFragment class and override the onCreateView() method. After this method is done we can get a non-null reference to que GoogleMap object.
This is my particular solution:
public class MiniMapFragment extends SupportMapFragment {
private LatLng mPosFija;
public MiniMapFragment() {
super();
}
public static MiniMapFragment newInstance(LatLng posicion){
MiniMapFragment frag = new MiniMapFragment();
frag.mPosFija = posicion;
return frag;
}
#Override
public View onCreateView(LayoutInflater arg0, ViewGroup arg1, Bundle arg2) {
View v = super.onCreateView(arg0, arg1, arg2);
initMap();
return v;
}
private void initMap(){
UiSettings settings = getMap().getUiSettings();
settings.setAllGesturesEnabled(false);
settings.setMyLocationButtonEnabled(false);
getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(mPosFija,16));
getMap().addMarker(new MarkerOptions().position(mPosFija).icon(BitmapDescriptorFactory.fromResource(R.drawable.marker)));
}
}
Now in the previous Fragment class I do
mMapFragment = MiniMapFragment.newInstance(new LatLng(37.4005502611301, -5.98233461380005));
Maybe it's not perfect yet, because the screen blinks when showing the map. But not sure if the problem is because of this or something else.

Thanks, found this very helpful. Am posting my slightly modified solution, as it was cleaner for me to tell the parent Fragment when the map was ready. This method also works with a saveInstanceState / restoreInstanceState cycle.
public class CustomMapFragment extends SupportMapFragment {
private static final String LOG_TAG = "CustomMapFragment";
public CustomMapFragment() {
super();
}
public static CustomMapFragment newInstance() {
CustomMapFragment fragment = new CustomMapFragment();
return fragment;
}
#Override
public View onCreateView(LayoutInflater arg0, ViewGroup arg1, Bundle arg2) {
View v = super.onCreateView(arg0, arg1, arg2);
Fragment fragment = getParentFragment();
if (fragment != null && fragment instanceof OnMapReadyListener) {
((OnMapReadyListener) fragment).onMapReady();
}
return v;
}
/**
* Listener interface to tell when the map is ready
*/
public static interface OnMapReadyListener {
void onMapReady();
}
}
To use as a nested Fragment:-
public class ParentFragment extends Fragment implements OnMapReadyListener {
...
mMapFragment = CustomMapFragment.newInstance();
getChildFragmentManager().beginTransaction().replace(R.id.mapContainer, mMapFragment).commit();
#Override
public void onMapReady() {
mMap = mMapFragment.getMap();
}
...
}
Hope it helps someone.

Here's my solution to this, I took inspiration from the code previously posted and cleaned it up. I also added the static methods with and without the GoogleMapOptions parameters.
public class GoogleMapFragment extends SupportMapFragment {
private static final String SUPPORT_MAP_BUNDLE_KEY = "MapOptions";
public static interface OnGoogleMapFragmentListener {
void onMapReady(GoogleMap map);
}
public static GoogleMapFragment newInstance() {
return new GoogleMapFragment();
}
public static GoogleMapFragment newInstance(GoogleMapOptions options) {
Bundle arguments = new Bundle();
arguments.putParcelable(SUPPORT_MAP_BUNDLE_KEY, options);
GoogleMapFragment fragment = new GoogleMapFragment();
fragment.setArguments(arguments);
return fragment;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallback = (OnGoogleMapFragmentListener) getActivity();
} catch (ClassCastException e) {
throw new ClassCastException(getActivity().getClass().getName() + " must implement OnGoogleMapFragmentListener");
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = super.onCreateView(inflater, container, savedInstanceState);
if (mCallback != null) {
mCallback.onMapReady(getMap());
}
return view;
}
private OnGoogleMapFragmentListener mCallback;
}
The usage pattern is as follows:
public class MyMapActivity implements OnGoogleMapFragmentListener {
...
#Override
public void onMapReady(GoogleMap map) {
mUIGoogleMap = map;
...
}
...
private GoogleMap mUIGoogleMap;
}

No need to cutomize SupportMapFragment you can do this directly by using following piece of code,
FragmentManager fm = getSupportFragmentManager(); // getChildFragmentManager inside fragments.
CameraPosition cp = new CameraPosition.Builder()
.target(initialLatLng) // your initial co-ordinates here. like, LatLng initialLatLng
.zoom(zoom_level)
.build();
SupportMapFragment mapFragment = SupportMapFragment.newInstance(new GoogleMapOptions().camera(cp));
fm.beginTransaction().replace(R.id.rl_map, mapFragment).commit();
Add this piece of code for layout
<RelativeLayout
android:id="#+id/rl_map"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
This will load GoogleMap at particular Location directly i.e, initialLatLng.