Trying to get current location when activity started

Trying to get current location when activity started - android

I want to zoom to the current location of user when activity started. I have two java class. One of is MapActivity.java and the other is MapFragment.java. I'm trying to do this job on MapFragment.java.
private Actvity activity;
private volatile GoogleMap googleMap;
GoogleApiClient mGoogleApiClient;
LocationRequest mLocationRequest;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = getActivity();
}
MapFragment.java/onMapReady ;
#Override
public void onMapReady(GoogleMap map) {
googleMap = map;
mGoogleApiClient=new GoogleApiClient.Builder(activity)
.addApi(LocationServices.API)
.addConnectionCallbacks(activity)
.addOnConnectionFailedListener(activity)
.build();
mGoogleApiClient.connect();
}
In this onMapReady, .addConnectionCallbacks(activity) and .addOnConnectionFailedListener(activity) are giving warning like in the image;
enter image description here
In the examples that I have analyzed before they are implementing GoogleApiClient.ConnectionCallbacks and GoogleApiCleint.OnConnectionFailedListener not casting. Without implementing, I couldn't get these functions;
#Override
public void onConnected(Bundle bundle) {
mLocationRequest=LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(1000);
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest,this);
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
And also I have to get LocationListeners's method;
#Override
public void onLocationChanged(Location location) {
if(location == null){
Toast.makeText(this,"Cant get current location",Toast.LENGTH_LONG).show();
}
else{
LatLng ll= new LatLng(location.getLatitude(),location.getLongitude());
CameraUpdate update= CameraUpdateFactory.newLatLngZoom(ll,15);
mGoogleMap.animateCamera(update);
}
}
If I implement them by hand in the fragment, does it cause any problem? What is the proper way to get current location in fragment activity?

If I implement them by hand in the fragment, does it cause any
problem?
No. All you need to do is implement ConnectionCallbacks and OnConnectionFailedListener.
What is the proper way to get current location in fragment activity?
public class MyFragment extends Fragment implements
ConnectionCallbacks, OnConnectionFailedListener {
// Create an instance of GoogleAPIClient.
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
protected void onStart() {
mGoogleApiClient.connect();
super.onStart();
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
#Override
public void onConnected(Bundle connectionHint) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient); // this is your location
if (mLastLocation != null) {
mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
}
}
}
Reference

I have implemented a Fragment in Activity and Location listener and MapReady is called in fragment to get current location. Refer the below code.
MainActivity.Java
public class MainActivity extends AppCompatActivity {
public static final String TAG = MainActivity.class.getSimpleName();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setFragment(new MapFragment());
}
// class for being re-used by several instances
protected void setFragment(Fragment fragment) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
}
}
Activity_Main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<FrameLayout
android:id="#+id/frame_containerone"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ImageView
android:id="#+id/imagenext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="16dp"
/>
</RelativeLayout>
MapFragment.Java
public class MapFragment extends Fragment implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener, OnMapReadyCallback {
private static final String TAG = "MapFragment";
MainActivity mActivity;
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
SupportMapFragment mapFragment;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.map_fragment, null, true);
mActivity = ((MainActivity) getActivity());
initViews(view);
return view;
}
private void initViews(View view) {
mGoogleApiClient = new GoogleApiClient.Builder(mActivity)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
// Create the LocationRequest object
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(10 * 1000) // 10 seconds, in milliseconds
.setFastestInterval(1 * 1000); // 1 second, in milliseconds
mapFragment = (SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap map) {
mMap = map;
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
#Override
public void onConnected(#Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(mActivity, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mActivity, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (location == null) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
} else {
handleNewLocation(location);
}
}
private void handleNewLocation(Location location) {
Log.d(TAG, location.toString());
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
MarkerOptions options = new MarkerOptions()
.position(latLng)
.title("I am here!");
mMap.addMarker(options);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(mActivity, CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
} else {
/*
* If no resolution is available, display a dialog to the
* user with the error.
*/
Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
#Override
public void onLocationChanged(Location location) {
handleNewLocation(location);
}
#Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
mGoogleApiClient.connect();
}
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.
mapFragment = (SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);// mapFragment.getMapAsync((OnMapReadyCallback) mActivity);
}
}
#Override
public void onPause() {
super.onPause();
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
}
}
map_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!-- <fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />-->
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="388dp"
android:layout_weight="0.40" />
</LinearLayout>
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.theme.fragment">
<permission
android:name="com.theme.fragment.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.theme.fragment.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Goolge API Key -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="Your_Api key" />
</application>
</manifest>

Related

Google maps v2 not initializing in fragment

I want to show my current location using Google maps v2 from a fragment however the Google maps is not initializing on start up. When i run the application, it is nor crashing but the map is not showing my current location neither is it displaying anything. I have used this code on my activity and it is fully functional.
Below is my java code:
public class MapFragment extends Fragment implements LocationListener,GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,OnMapReadyCallback {
SupportMapFragment mSupportMapFragment;
MapView mMapView;
Location mLastLocation;
Marker mCurrLocationMarker;
private MarkerOptions markerOptions;
protected GoogleApiClient mGoogleApiClient;
private LatLng latLng;
public GoogleMap mMap;
private Marker marker;
LocationRequest mLocationRequest;
private GoogleMap googleMap;
private TextView lastTrip, lastDeliveryText, lastDelivery, lastAmountText, lastAmount, kes,
todayTotal, totalDeliveryText, totalDelivery, totalAmount, totalAmountText;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
buildGoogleApiClient();
// inflat and return the layout
View v = inflater.inflate(R.layout.map_fragment, container,
false);
mSupportMapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.mapwhere);
if (mSupportMapFragment == null) {
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
mSupportMapFragment = SupportMapFragment.newInstance();
fragmentTransaction.replace(R.id.mapwhere, mSupportMapFragment).commit();
}
if (mSupportMapFragment != null) {
mSupportMapFragment.getMapAsync(this);
}
return v;
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
Log.d("one","one");
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//mMap.getUiSettings().setZoomControlsEnabled(true);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
Log.d("two","two");
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
} else {
Log.d("three","three");
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
Log.d("four","four");
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.addApi(Places.GEO_DATA_API)
.build();
mGoogleApiClient.connect();
}
#Override
public void onLocationChanged(Location location) {
Log.d("five","five");
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//mMap.getUiSettings().setZoomControlsEnabled(true);
final Double lat = location.getLatitude();
final Double lng = location.getLongitude();
Log.d("LATLANGz", lat + "|" + lng);
latLng = new LatLng(lat, lng);
markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Positionn");
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), 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;
}
mMap.setMyLocationEnabled(false);
markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.user_location));
marker = mMap.addMarker(markerOptions);
//move map camera_main
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(12));
}
#Override
public void onResume() {
super.onResume();
Log.d("hey2","hey2");
// mMapView.onResume();
mSupportMapFragment.onResume();
}
#Override
public void onPause() {
super.onPause();
Log.d("hey1","hey1");
// mMapView.onPause();
mSupportMapFragment.onPause();
}
/* #Override
public void onDestroy() {
super.onDestroy();
// mMapView.onDestroy();
mSupportMapFragment.onDestroy();
}*/
#Override
public void onLowMemory() {
super.onLowMemory();
// mMapView.onLowMemory();
mSupportMapFragment.onLowMemory();
}
#Override
public void onDetach() {
Log.d("detach", "detach");
super.onDetach();
mSupportMapFragment.onDetach();
}
#Override
public void onConnected(#Nullable Bundle bundle) {
Log.d("six","six");
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (mGoogleApiClient.isConnected()){
Log.d("seven","six");
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}

first of all Chaeck permission in manifest
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
then check method for current location
private GoogleMap.OnMyLocationChangeListener myLocationChangeListener = new GoogleMap.OnMyLocationChangeListener() {
#Override
public void onMyLocationChange(Location location) {
LatLng loc = new LatLng(location.getLatitude(), location.getLongitude());
marker = map.addMarker(new MarkerOptions().position(loc));
if(map != null){
map.animateCamera(CameraUpdateFactory.newLatLngZoom(loc, 16.0f));
}
}
};
then use
mMap.setOnMyLocationChangeListener(myLocationChangeListener);
and be patience map take laoding time depend on you network speed
comment if any query

First check your permissions and your google api key in your manifest
Your xml layout must be something like this without any thing else:
. <fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.isg_biz.isg_tracking.MainActivity" />
You have to implement OnMapReadyCallback, then
your code should be something like this in onCreate() :
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
Do not to copy and past the same xml code literally you have to change (tools : .....) to same that exist in your xml
for documentation, java code & more Please read :
https://developers.google.com/maps/documentation/android-api/map-with-marker

Requesting location permissions

My app is using API 23 and I'm using my Samsung Galaxy S5 to test it. I am using the GoogleMaps API as well.
In the onConnected() method I want to retrieve the user's current location so I have this:
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
but with only that, it is underlined red with the following error:
Call requires permission which may be rejected by the user: code should explicitly check to see if permission is available (with CheckPermission)...
and it gives me the option to 'add permission check' which inserts some code and I add something to it, so the onConnected() method is like this
#Override
public void onConnected(Bundle bundle) {
Log.i(TAG, "oOnConnected() called");
boolean r = ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED;
Log.i(TAG, "result = : " + r );
if (ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED ) {
Log.i(TAG, "PERMISSIONS NOT SET");
requestPermissions(new String[] { android.Manifest.permission.ACCESS_FINE_LOCATION }, 100);
return;
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
String s = String.valueOf(mLastLocation.getLatitude()) + " " +
String.valueOf(mLastLocation.getLongitude());
Log.i(TAG, "CURRENT LOCATION: " + s);
}
There is a problem when I run the code:
(1) When I have location on my device enabled it works fine, I see my current location in the terminal. I check the value of r and it's false...
(2) When location is disabled, when I run the app it crashes and the "stop working" message appears. I check the terminal and it crashed because of the mLastLocation object is null or something. But those lines shouldn't be executed, it should be asking for permissions. I checked the value of r and it's false as well.
Why is r false in both cases? How do I fix this to get permissions to pop up when location is disabled?

my solution would be
in the manifest file
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="YOUR_KEY" />
i created a fragment that will hold the map
public class BlankFragment extends Fragment implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
private GoogleApiClient googleApiClient = null;
FusedLocationProviderApi fusedLocationProviderApi;
LocationRequest locationRequest;
final int PERMISSIONS_REQUEST = 900;
private static final LatLng STUTTGART = new LatLng(48.792925, 9.204344);
private static final float STUTTGART_ZOOM = 16;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_blank, container, false);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getLocation();
}
private void getLocation() {
locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(10000);
locationRequest.setFastestInterval(5000);
fusedLocationProviderApi = LocationServices.FusedLocationApi;
googleApiClient = new GoogleApiClient.Builder(getContext())
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
googleApiClient.connect();
}
#Override
public void onConnected(Bundle arg0) {
if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
PERMISSIONS_REQUEST);
return;
}
fusedLocationProviderApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
#Override
public void onLocationChanged(Location location) {
Toast.makeText(getContext(), "location :"+location.getLatitude()+" , "+location.getLongitude(), Toast.LENGTH_SHORT).show();
}
#Override
public void onPause() {
super.onPause();
if (googleApiClient.isConnected()) {
googleApiClient.disconnect();
}
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
googleMap.clear();
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(STUTTGART, STUTTGART_ZOOM));
googleMap.getUiSettings().setMapToolbarEnabled(false);
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onRequestPermissionsResult(int requestCode,
#NonNull String permissions[], #NonNull int[] grantResults) {
switch (requestCode) {
case PERMISSIONS_REQUEST: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay!
fusedLocationProviderApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
}
}
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}
}
the xml file looks like this
<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"
tools:context="com.bemaxnet.test.maps.fragment.BlankFragment">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<Button
android:id="#+id/currentLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="current location"
android:drawableLeft="#android:drawable/ic_menu_add"/>
</FrameLayout>
and finally added those dependencies in the app gradle
compile 'com.google.android.gms:play-services-maps:9.6.1'
compile 'com.google.android.gms:play-services-location:9.6.1'

getLastLocation() always null in GoogleApiClient

Am trying to build an application that requests the current location using the GoogleClientApi and LocationServices, but the Location is always null even that I enabled the WiFi,Mobile Data and GPS , tested it on several devices all the same
the permissions from the manifest.xml :
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
Activity:
public class FindStation extends Fragment implements GoogleApiClient.ConnectionCallbacks,GoogleApiClient.OnConnectionFailedListener,com.google.android.gms.location.LocationListener
{
public static FragmentManager fragmentManager;
Button goButton;
Spinner spinner;
SupportMapFragment mapFragment;
GoogleMap map;
List<Stations> stationsList;
ArrayList<String> stationsAddresses;
private static View view;
ArrayList<MarkerOptions> markers;
GoogleApiClient mGoogleApiClient;
LocationServices locationServices;
Location location;
private static String TAG="FIND_STATION";
Context context;
LocationRequest mLocationRequest;
LocationListener locationListener;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
context= getActivity();
locationListener=this;
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10000);
mLocationRequest.setFastestInterval(5000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(10);
/*mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();*/
buildGoogleApiClient();
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null)
parent.removeView(view);
}
try {
view = inflater.inflate(R.layout.activity_find_station, container, false);
} catch (InflateException e) {
}
inflater.inflate(R.layout.activity_find_station,container,false);
stationsAddresses = new ArrayList<>();
goButton= (Button) view.findViewById(R.id.button);
//goButton.setVisibility(View.INVISIBLE);
spinner= (Spinner) view.findViewById(R.id.spinner);
stationsList = Stations.listAll(Stations.class);
markers = new ArrayList<>();
for (int i = 0; i <stationsList.size() ; i++) {
stationsAddresses.add(stationsList.get(i).getStationLocation());
markers.add(new MarkerOptions().position(new LatLng(stationsList.get(i).getStationLat(), stationsList.get(i).getStationLong())).title(stationsList.get(i).getStationName()));
}
goButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//location= LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
}
});
try {
initialize();
} catch (Exception e) {
e.printStackTrace();
}
try {
// map.setMyLocationEnabled(true);
} catch (Exception e) {
e.printStackTrace();
}
/*thread = new Thread(new MyThread());
thread.start();*/
return view;
}
private void initialize() {
if (map==null) {
Fragment fragment= getChildFragmentManager().findFragmentById(R.id.map);
mapFragment= (SupportMapFragment) fragment;
map=mapFragment.getMap();
for (int i = 0; i <markers.size() ; i++) {
map.addMarker(markers.get(i));
}
// check if map is created successfully or not
if (map==null) {
Toast.makeText(super.getActivity(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
public void onDestroyView() {
super.onDestroyView();
android.support.v4.app.FragmentManager fm = getActivity().getSupportFragmentManager();
SupportMapFragment fragment = (SupportMapFragment) fm.findFragmentById(R.id.map);
if (fragment!=null) {
android.support.v4.app.FragmentTransaction ft = fm.beginTransaction();
ft.remove(fragment);
ft.commit();
}
}
#Override
public void onConnected(Bundle bundle) {
location= LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (location!=null){
Log.d(TAG,location.toString());
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(),location.getLongitude()),3f);
map.animateCamera(update);
}
Log.d(TAG,"connected");
}
#Override
public void onConnectionSuspended(int i) {
Log.d(TAG,"connection suspended "+String.valueOf(i));
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.d(TAG,"connection failed");
}
#Override
public void onLocationChanged(Location location) {`enter code here`
Log.d(TAG,location.toString());
this.location=location;
if (location!=null) {
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 3f);
map.animateCamera(update);
Log.d(TAG, "camera updated to new position");
goButton.setVisibility(View.VISIBLE);
}
}
#Override
public void onStart() {
super.onStart();
mGoogleApiClient.connect();
Log.d(TAG,"connect() was called");
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
}
the strange thing is that the onConnect() method is called but after that the Location is always null and onLocationChanged() is never called
using the maps, i tried the enabling my location and it works when you have the button on the right top corner it returns the location and animates the camera.
UPDATE 1
updated the onConnected() method and made it request locations updates,
public void onConnected(Bundle bundle) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, locationListener);
if (location!=null){
Log.d(TAG,location.toString());
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(),location.getLongitude()),3f);
map.animateCamera(update);
}
Log.d(TAG,"connected");}
then with a button i call lastKnownLocation() since the onLocationChanged() is not called still, and still the returned Location is null
UPDATE 2 :
The very same code worked on Android 5.0.1 and worked perfectly
all the other devices was on android 2.3.7,4.0.1 none of them worked,
Any idea about what difference in the Android APIs regarding the location?

You need to call requestLocationUpdates() in order to register the listener and have onLocationChanged() invoked.
Be sure to un-register the listener as soon as possible to avoid excessive battery drain.
Also note that the getLastLocation() method can and will return null. The main problem is that it doesn't prompt a request to the OS for a new location lock, instead it just checks if there was a last known location from some other app's location request. If no other app had recently made a location request, then you get a null location returned to you.
The only way to guarantee that you actually get a location is to request one, and this is done with a call to requestLocationUpdates().
Here is a working example for reference:
public class MainActivity extends FragmentActivity
implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener,
LocationListener {
private GoogleMap map;
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private Marker marker;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
protected void onResume() {
super.onResume();
buildGoogleApiClient();
mGoogleApiClient.connect();
if (map == null) {
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
}
#Override
public void onMapReady(GoogleMap retMap) {
map = retMap;
setUpMap();
}
public void setUpMap(){
map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
map.setMyLocationEnabled(true);
}
#Override
protected void onPause(){
super.onPause();
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
protected synchronized void buildGoogleApiClient() {
Toast.makeText(this, "buildGoogleApiClient", Toast.LENGTH_SHORT).show();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
#Override
public void onConnected(Bundle bundle) {
Toast.makeText(this,"onConnected",Toast.LENGTH_SHORT).show();
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setSmallestDisplacement(0.1F);
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
#Override
public void onConnectionSuspended(int i) {
Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show();
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show();
}
#Override
public void onLocationChanged(Location location) {
mLastLocation = location;
//remove previous current location Marker
if (marker != null){
marker.remove();
}
double dLatitude = mLastLocation.getLatitude();
double dLongitude = mLastLocation.getLongitude();
marker = map.addMarker(new MarkerOptions().position(new LatLng(dLatitude, dLongitude))
.title("My Location").icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(dLatitude, dLongitude), 8));
}
}
One more thing, if your map is in a Fragment, there is no need to have a nested SupportMapFragment. You can just have your Fragment extend SupportMapFragment. This removes the need of having a nested Fragment, and you don't even need to inflate any layout xml, here is a simple example:
public class MapTabFragment extends SupportMapFragment
implements OnMapReadyCallback {
private GoogleMap mMap;
private Marker marker;
public MapTabFragment() {
}
#Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
getMapAsync(this);
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
setUpMap();
}
private void setUpMap() {
mMap.setMyLocationEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
mMap.getUiSettings().setMapToolbarEnabled(false);
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
#Override
public void onMapClick(LatLng point) {
//remove previously placed Marker
if (marker != null) {
marker.remove();
}
//place marker where user just clicked
marker = mMap.addMarker(new MarkerOptions().position(point).title("Marker")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)));
}
});
}
}

google maps v2 center mylocation

I am having some prolems with my google maps app. For now the app was only suppost to get my location em zoom in it, but is not working. My location aways ends in the top of the map. Here is my code:
MainActivity:
public class MainActivity extends Activity implements LocationListener {
private GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (isGooglePlayOk()) {
setContentView(R.layout.activity_main);
setMap();
googleMap.setMyLocationEnabled(true);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.action_legalnotices:
startActivity(new Intent(this, LegalNoticeActivity.class));
return true;
default:
return false;
}
}
private boolean isGooglePlayOk() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (status == ConnectionResult.SUCCESS) {
return (true);
}
else {
((Dialog) GooglePlayServicesUtil.getErrorDialog(status, this, 10))
.show();
}
return (false);
}
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void setMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.main.map)).getMap();
if (googleMap != null) {
}
googleMap.setMyLocationEnabled(true);
LocationManager la = (LocationManager) getSystemService(LOCATION_SERVICE);
String provider = la.getBestProvider(new Criteria(), true);
Location loc = la.getLastKnownLocation(provider);
if (provider != null) {
onLocationChanged(loc);
}
googleMap.setOnMapLongClickListener(onLongClickMapSettiins());
}
}
private OnMapLongClickListener onLongClickMapSettiins() {
// TODO Auto-generated method stub
return new OnMapLongClickListener() {
#Override
public void onMapLongClick(LatLng point) {
Toast.makeText(getApplicationContext(), "OK",
Toast.LENGTH_SHORT).show();
}
};
}
#Override
public void onLocationChanged(Location location) {
LatLng latlong = new LatLng(location.getLatitude(),
location.getLongitude());
googleMap.setMyLocationEnabled(true);
CameraPosition cp = new CameraPosition.Builder().target(latlong)
.zoom(15).build();
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(cp));
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
activity_main:
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+main/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.MapFragment"/>
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mapateste"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!--
The following two permissions are not required to use
Google Maps Android API v2, but are recommended.
-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="(My Api is working fine)" />
<activity
android:name="com.example.mapateste.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.mapateste.LegalNoticeActivity"
android:label="#string/title_activity_legal_notice" >
</activity>
</application>
I can only test in my device. The map is working fine but i cannot get my position on the center of the screen right away only clicking at the mylocationbutton. Somebody can help me?

Just declare a point where you want to center your point.
LatLng cur_Latlng = new LatLng(21.0000, 78.0000);
gm.moveCamera(CameraUpdateFactory.newLatLng(cur_Latlng));
gm.animateCamera(CameraUpdateFactory.zoomTo(4));
the desired zoom level is in the range of 2.0 to 21.0.

// try this
#Override
public void onLocationChanged(Location location) {
LatLng latlong = new LatLng(location.getLatitude(),
location.getLongitude());
googleMap.animateCamera(CameraUpdateFactory.newLatLng(latlong));
googleMap.animateCamera(CameraUpdateFactory.zoomBy(15));
}

Your min sdk is 8. You should use SupportMapFragment. Your class must extend FragmentActivtiy
Check the line above developers guide heading in the below link
https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/MapFragment
<fragment
class="com.google.android.gms.maps.SupportMapFragment"
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Use SupportMapFragment
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
GoogleMap mMap = fm.getMap();
Make sure you have added support library
Also make sure you imported the below
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.SupportMapFragment
To zoom
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(latlong,20);
googleMap.moveCamera(update);

This is working Current Location with zoom for Google Map V2
double lat= location.getLatitude();
double lng = location.getLongitude();
LatLng ll = new LatLng(lat, lng);
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(ll, 20));

Note that the My Location layer does not return any data. If you wish to access location data programmatically, use the Location API.
In your MainActivity (onCreate Method)
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(MainActivity.this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
On method onMapReady
#Override
public void onMapReady(GoogleMap googleMap) {
GoogleMap mMap = googleMap;
// Set blue point on the map at your cuurent location
mMap.setMyLocationEnabled(true);
// Show zoon controls on the map layer
mMap.getUiSettings().setZoomControlsEnabled(true);
//Show My Location Button on the map
mMap.getUiSettings().setMyLocationButtonEnabled(true);
}
on method onConnected
#Override
public void onConnected(Bundle bundle) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
LocationListener.latlonInit= new LatLng(mLastLocation.getLatitude(),mLastLocation.getLongitude());
CameraPosition target = CameraPosition.builder().tilt(66.0f).target(LocationListener.latlonInit)
.zoom(MainActivity.ZOOM).build();
mMap.moveCamera(CameraUpdateFactory.newCameraPosition(target));
}
}

You class should extend Fragment Activity
public class MainActivity extends FragmentActivity {
//assign any arbitrary value to GPS_ERRODIALOG_REQUEST
private static final int GPS_ERRORDIALOG_REQUEST = 9001;
GoogleMap googlemap;
}
for Google Service Ok method I would do Following:
public boolean isGooglePlayOk(){
int isAvailable = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (isAvailable == ConnectionResult.SUCCESS) {
return true;
}
else if(GooglePlayServicesUtil.isUserRecoverableError(isAvailable)){
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(isAvailable, this, GPS_ERRORDIALOG_REQUEST);
dialog.show();
}
else {
Toast.makeText(this, "Can't connect to Goolge Play", Toast.LENGTH_SHORT).show();
}
return false;
}
In the .xml file, when you declare the fragment, you need to support Map Fragment since your min skd is 8:
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:maps="http://schemas.android.com/apk/res-auto"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />

activity_map.xml is for displaying map if condition is true for setMap else go to you regular activity_main.xml.
public class MainActivity extends FragmentActivity {
GoogleMap mMap;
if (isGooglePlayOk()) {
setContentView(R.layout.activity_map);
if (setMap()) {
mMap.setMyLocationEnabled(true);
}
else {
//your code
}
}
else {
setContentView(R.layout.activity_main);
}
method for setMap:
private boolean setMap() {
if (mMap == null) {
SupportMapFragment mapFrag =
(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mMap = mapFrag.getMap();
}
return (mMap != null);
}

If you want to automatically zoom to some point in google maps v2 u can do like this
private float previousZoomLevel = 13.00f;
LatLng zoomPoint = new LatLng(12.977286, 77.632720);
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(zoomPoint,previousZoomLevel));
here previousZoomLevel is level of zoom

Add Google Maps API V2 in a fragment

I'm trying to show the map from the Google Maps API V2 in fragment. I tried with the SupportMapFragment, but I can't get the expected output.
Also I'm a beginner on this platform! What I really want is just a way to put a map from the Google Maps API V2 for Android in a fragment. Please share your ideas and references.
Thanks in Advance !

Here is the code,
public class YourFragment extends Fragment {
// ...
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
static final LatLng KIEL = new LatLng(53.551, 9.993);
private GoogleMap map;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.yourlayout, null, false);
map = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
Marker kiel = map.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.ic_launcher)));
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
//...
return v;
}
Your layout,
<RelativeLayout 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"
tools:context=".MainActivity" >
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</RelativeLayout>
Make some changes in your manifest file also.Like,
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myapp.android.locationapi.maps"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="17" />
<permission
android:name="com.myapp.android.locationapi.maps.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-permission android:name="com.myapp.android.locationapi.maps.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.myapp.android.locationapi.maps.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="your_apikey" />
</application>
</manifest>

public class DemoFragment extends Fragment {
MapView mapView;
GoogleMap map;
LatLng CENTER = null;
public LocationManager locationManager;
double longitudeDouble;
double latitudeDouble;
String snippet;
String title;
Location location;
String myAddress;
String LocationId;
String CityName;
String imageURL;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater
.inflate(R.layout.fragment_layout, container, false);
mapView = (MapView) view.findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
setMapView();
}
private void setMapView() {
try {
MapsInitializer.initialize(getActivity());
switch (GooglePlayServicesUtil
.isGooglePlayServicesAvailable(getActivity())) {
case ConnectionResult.SUCCESS:
// Toast.makeText(getActivity(), "SUCCESS", Toast.LENGTH_SHORT)
// .show();
// Gets to GoogleMap from the MapView and does initialization
// stuff
if (mapView != null) {
locationManager = ((LocationManager) getActivity()
.getSystemService(Context.LOCATION_SERVICE));
Boolean localBoolean = Boolean.valueOf(locationManager
.isProviderEnabled("network"));
if (localBoolean.booleanValue()) {
CENTER = new LatLng(latitude, longitude);
} else {
}
map = mapView.getMap();
if (map == null) {
Log.d("", "Map Fragment Not Found or no Map in it!!");
}
map.clear();
try {
map.addMarker(new MarkerOptions().position(CENTER)
.title(CityName).snippet(""));
} catch (Exception e) {
e.printStackTrace();
}
map.setIndoorEnabled(true);
map.setMyLocationEnabled(true);
map.moveCamera(CameraUpdateFactory.zoomTo(5));
if (CENTER != null) {
map.animateCamera(
CameraUpdateFactory.newLatLng(CENTER), 1750,
null);
}
// add circle
CircleOptions circle = new CircleOptions();
circle.center(CENTER).fillColor(Color.BLUE).radius(10);
map.addCircle(circle);
map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
break;
case ConnectionResult.SERVICE_MISSING:
break;
case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:
break;
default:
}
} catch (Exception e) {
}
}
in fragment_layout
<com.google.android.gms.maps.MapView
android:id="#+id/mapView"
android:layout_width="match_parent"
android:layout_height="160dp"
android:layout_marginRight="10dp" />

Update 10/24/2014 This is all wrong. You shouldn't have a fragment in a fragment. Rather you should extend the SupportMapFragment. See this stackoverflow post for some details: https://stackoverflow.com/a/19815266/568197
here is my onDestroyView()
public void onDestroyView() {
super.onDestroyView();
if (mMap != null) {
getFragmentManager()
.beginTransaction()
.remove(getFragmentManager().findFragmentById(R.id.map))
.commit();
}
}

in addition to the answer above, I also had to put the following lines to my manifest
<!-- inside <aplication> tag -->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
And I also changed the layout to use SupportMapFragment instead of MapFragment
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />

Here is my code.
Create project in google map concole and generate api key.
and then add dependency to build.gradle(app level).
compile 'com.google.android.gms:play-services-maps:10.2.1'
compile 'com.google.android.gms:play-services-location:10.2.1'
compile 'com.google.android.gms:play-services-places:10.2.1'
remember to add permissions in Android.manifest
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-feature android:name="android.hardware.location.gps" android:required="true"/>
create activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
tools:ignore="MergeRootFrame">
<fragment
class="com.googlelocationmapdemo.FragmentLocation"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
nothing to call from MainActivity.class
Create fragment_location.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linearMap"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
Create FragmentLocation.class
public class FragmentLocation extends Fragment implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {
public static final String TAG = FragmentLocation.class.getSimpleName();
public static final int REQUEST_CODE_FOR_PERMISSIONS = 1;
GoogleApiClient mGoogleApiClient;
LatLng mLatLng;
GoogleMap mGoogleMap;
Marker mCurrLocationMarker;
private LinearLayout linearMap;
Location mLastLocation;
LocationManager locationManager;
boolean statusOfGPS;
private Dialog mDialogGPS;
View view;
LocationRequest mLocationRequest;
SupportMapFragment mFragment;
FragmentManager fragmentManager;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view=inflater.inflate(R.layout.fragment_location,container,false);
fragmentManager=getChildFragmentManager();
mFragment = (SupportMapFragment)fragmentManager.findFragmentById(R.id.map);
mFragment.getMapAsync(this);
if (!isGooglePlayServicesAvailable()) {
Toast.makeText(getActivity(), "play services not available", Toast.LENGTH_SHORT).show();
}
locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
statusOfGPS = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
return view;
}
#Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000); //5 seconds
mLocationRequest.setFastestInterval(2000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
#Override
public void onLocationChanged(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
mLatLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(mLatLng);
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(mLatLng));
// Zoom in the Google Map
mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
}
#Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (getActivity().checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION)
== PackageManager.PERMISSION_GRANTED &&
getActivity().checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION
, Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_CODE_FOR_PERMISSIONS);
}
} else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
//show dialog when click on location top-right side located on map.
mGoogleMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() {
#Override
public boolean onMyLocationButtonClick() {
statusOfGPS = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!statusOfGPS) {
turnOnGps();
} else {
getCurrentLocation(mLastLocation);
}
return false;
}
});
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity());
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, getActivity(), 0).show();
return false;
}
}
#RequiresApi(api = Build.VERSION_CODES.M)
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case REQUEST_CODE_FOR_PERMISSIONS:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (getActivity().checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION)
== PackageManager.PERMISSION_GRANTED &&
getActivity().checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
if (!(shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_COARSE_LOCATION)) && (!(shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_FINE_LOCATION)))) {
Snackbar snackbar = Snackbar.make(linearMap, "Never asked"
, Snackbar.LENGTH_INDEFINITE);
snackbar.setAction("Allow", new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent();
intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", getActivity().getPackageName(), null);
intent.setData(uri);
startActivity(intent);
}
});
snackbar.show();
}
}
break;
}
}
private void getCurrentLocation(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
if (locationManager != null) {
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mLastLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);//getting last location
}
if (mLastLocation != null) {
if (mGoogleMap != null) {
Log.d("activity", "LOC by Network");
mLatLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(mLatLng);
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(mLatLng));
mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
}
}
}
}
private void turnOnGps() {
if (mGoogleMap != null) {
mGoogleMap.clear();
}
statusOfGPS = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);//getting status of gps whether gps is on or off.
mDialogGPS = new Dialog(getActivity(), R.style.MyDialogTheme);
mDialogGPS.requestWindowFeature(Window.FEATURE_NO_TITLE);
mDialogGPS.setContentView(R.layout.dialog_turnongps);
TextView txtCancel = (TextView) mDialogGPS.findViewById(R.id.txtCancel);
TextView txtOK = (TextView) mDialogGPS.findViewById(R.id.txtSetting);
ImageView imgLocation = (ImageView) mDialogGPS.findViewById(R.id.imgLocation);
imgLocation.setImageResource(R.drawable.ic_location_my);
txtCancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mDialogGPS.dismiss();
//finish();
if (!statusOfGPS) {
getCurrentLocationByDefault();
} else {
getCurrentLocation(mLastLocation);
}
}
});
txtOK.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//It is use to redirect to setting->location to turn on gps when press ok.
startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
mDialogGPS.dismiss();
if (!statusOfGPS) {
getCurrentLocationByDefault();
} else {
getCurrentLocation(mLastLocation);
}
}
});
mDialogGPS.show();
}
private void getCurrentLocationByDefault() {
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
if (mGoogleMap != null) {
LatLng xFrom1 = new LatLng(0.0, 0.0);
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(xFrom1, (float) 0.0));
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(xFrom1);
markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_taxi));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
} else {
Log.i("MainActivity", "getCurrentLocationByDefault else");
}
}
#Override
public void onResume() {
super.onResume();
statusOfGPS = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (mDialogGPS != null) {
if (mDialogGPS.isShowing()) {
mDialogGPS.dismiss();
}
}
if (!statusOfGPS) {
turnOnGps();
} else {
getCurrentLocation(mLastLocation);
}
}
protected synchronized void buildGoogleApiClient() {
if (mGoogleApiClient != null) {
mGoogleApiClient = null;
}
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
}
create dailog_gps.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/txtPhoneNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Use Location?"
android:textColor="#android:color/black"
android:textSize="16sp"
/>
</LinearLayout>
<LinearLayout
android:layout_marginTop="15dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="This app wants to change your \ndevice settings:"
android:textSize="14sp" />
</LinearLayout>
<LinearLayout
android:layout_marginTop="10dp"
android:weightSum="2"
android:gravity="center"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imgLocation"
android:layout_weight="1"
android:layout_gravity="top"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Use GPS, Wi-Fi and mobile \nnetwork for location"
android:layout_marginLeft="20dp"
android:textSize="12sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:orientation="horizontal"
android:layout_marginTop="20dp">
<TextView
android:id="#+id/txtCancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="NO"
android:layout_marginRight="30dp"
android:textSize="16sp" />
<TextView
android:id="#+id/txtSetting"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="YES"
android:layout_marginRight="30dp"
android:textSize="16sp" />
</LinearLayout>
</LinearLayout>
Hope this will help you :-)

Use SupportMapFragment instead of MapFragment and use getActivity()
This is a basic example using SupportMapFragment:
public class MainActivity extends ActionBarActivity implements OnMapReadyCallback{
private SupportMapFragment map;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
map = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
map.getMapAsync(this);//remember getMap() is deprecated!
}
#Override
public void onMapReady(GoogleMap map) {
map.moveCamera(CameraUpdateFactory.newLatLngZoom(
new LatLng(47.17, 27.5699), 16));
map.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher))
.anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
.position(new LatLng(47.17, 27.5699))); //Iasi, Romania
map.setMyLocationEnabled(true);
}
}
and change the reference in your layout:
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />

For all those friends who are facing the problem:-
java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.maps.GoogleMap com.google.android.gms.maps.SupportMapFragment.getMap()
Please try integrate GoogleMap using code
FragmentManager fm = getChildFragmentManager();
googleMap = ((SupportMapFragment)fm.findFragmentById(R.id.googleMap)).getMap();

I've the same issue , I use this code but I still get this error :
unable to instantiate fragment com.google.android.gsm.SupportMapFragment: make sure class name exists ,is public, and has empty construct or that is public
I solved it from here : How to put Google Maps V2 on a Fragment Using ViewPager

If you are using android studio create google mapsactivity its default map fragment and generate your map API KEY and do your stuff......
SupportMapFragment mapFragment = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
and our override method
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
LatLng map = new LatLng(lat, lon);
mMap.addMarker(new MarkerOptions().position(map).title("your title"));
mMap.animateCamera(CameraUpdateFactory.newLatLng(map));
mMap.setMapType(GoogleMap.MAP_TYPE_NONE);
}

This example was build from the auto generated code from android studio, you dont need to change nothing in maps activity, only the context in the layout file to match your maps Activity
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="1">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="300dp"
tools:context="com.gearwell.app.gpsmaps02.Gpsenmapa"
/>
<LinearLayout
android:id="#+id/layButtonH"
android:layout_height="150dp"
android:layout_marginTop="50dp"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_weight="0.15">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Obtener Ubicacion"
android:id="#+id/btnLocation"
android:onClick="onClick"/>
</LinearLayout>
</LinearLayout>

Using MapView within Fragment under Google Maps Android API v2.0
public class MapFragment extends Fragment {
MapView m;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// inflat and return the layout
View v = inflater.inflate(R.layout.map_fragment, container, false);
m = (MapView) v.findViewById(R.id.mapView);
m.onCreate(savedInstanceState);
return v;
}
#Override
public void onResume() {
super.onResume();
m.onResume();
}
#Override
public void onPause() {
super.onPause();
m.onPause();
}
#Override
public void onDestroy() {
super.onDestroy();
m.onDestroy();
}
#Override
public void onLowMemory() {
super.onLowMemory();
m.onLowMemory();
}
}
http://ucla.jamesyxu.com/?p=287

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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