GoogleMap.getMyLocation() returns null

Question

I am trying to zoom into the user's current location on a map. The location is definitely accessible because it is showing as a blue dot on map

However, GoogleMap.getMyLocation() is returning null.

In order to enable location data I followed the Google documentation and added the proper permissions in my manifest, in addition to adding the necessary the API key.

If it is helpful at all my MyActivity.java:

package com.example.beckah.helloworld;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.location.Location;
import android.location.LocationListener;
import android.content.Context;
import android.location.LocationManager;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    private LatLng location;
    Location mLocation;
    LocationManager locationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }


    /**
     * Manipulates the map once available.
     * This callback is triggered when the map is ready to be used.
     * This is where we can add markers or lines, add listeners or move the camera. In this case,
     * we just add a marker near Sydney, Australia.
     * If Google Play services is not installed on the device, the user will be prompted to install
     * it inside the SupportMapFragment. This method will only be triggered once the user has
     * installed Google Play services and returned to the app.
     */
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        mMap.setMyLocationEnabled(true);
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        mLocation = googleMap.getMyLocation();


        if(mLocation != null) location = new LatLng(mLocation.getLatitude(), mLocation.getLongitude());
        else location = new LatLng(31, 31);

        mMap.addMarker(new MarkerOptions().position(location).title("Marker in Sydney"));
        mMap.moveCamera(CameraUpdateFactory.newLatLng(location));


    }
}

My manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.beckah.helloworld">

    <!--
         The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
         Google Maps Android API v2, but you must specify either coarse or fine
         location permissions for the 'MyLocation' functionality. 
    -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_GPS" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <permission android:name="com.example.beckah.helloworld.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <!--
             The API key for Google Maps-based APIs is defined as a string resource.
             (See the file "res/values/google_maps_api.xml").
             Note that the API key is linked to the encryption key used to sign the APK.
             You need a different API key for each encryption key, including the release key that is used to
             sign the APK for publishing.
             You can define the keys for the debug and release targets in src/debug/ and src/release/. 
        -->
        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_maps_key" />

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

How can I ensure that GoogleMap.getMyLocation() does not return null and is able to get the location data?

That method is deprecated: https://developers.google.com/android/reference/com/google/android/gms/maps/GoogleMap.html#getMyLocation() Take a look at the code in this answer: http://stackoverflow.com/a/30255219/4409409 — Daniel Nugent, Nov 28 '15 at 00:26

score 7 · Accepted Answer · answered Nov 28 '15 at 00:05

7

The following code should work for the last known location of the user

LocationManager service = (LocationManager) 

getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = service.getBestProvider(criteria, false);
Location location = service.getLastKnownLocation(provider);
LatLng userLocation = new LatLng(location.getLatitude(),location.getLongitude());

answered Nov 28 '15 at 00:05

Smittey

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for the first time I am getting location null, can u tell me what to do for current location in on create when i will start my app first time ? – GS Nayma Aug 24 '16 at 10:17

score 4 · Answer 2 · edited Aug 10 '16 at 12:18

Try to add this method to your code in order to find the last known location:

private Location getMyLocation() {
    LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    Location myLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    if (myLocation == null) {
        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_COARSE);
        String provider = lm.getBestProvider(criteria, true);
        myLocation = lm.getLastKnownLocation(provider);
    }
    return myLocation;
}

Then replace

mLocation = googleMap.getMyLocation();

with

mLocation = getMyLocation();

GoogleMap.getMyLocation() returns null

2 Answers2