Android: Google Fused Location doesn't work while location is turned off

Question

getLastLocation() returns NULL while phone location is Off on my 6.0 Nexus 7 tablet, but it works without GPS on another device. Why is it so and any way to solve it? I want to keep GPS off and just use network to get location.

Below is the class I am using to get location:

public class GPSCenter {
public static GoogleApiClient mGoogleApiClient;
public static Location mLastLocation;
private static Context mContext;

static GoogleApiClient.ConnectionCallbacks ccb = new GoogleApiClient.ConnectionCallbacks() {

    @Override
    public void onConnectionSuspended(int arg0) {
    }

    @Override
    public void onConnected(Bundle arg0) {

        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }

        LocationRequest mLocationRequest = LocationRequest.create();
        mLocationRequest.setPriority(LocationRequest.PRIORITY_NO_POWER);

        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    }
};
static GoogleApiClient.OnConnectionFailedListener odfl = new GoogleApiClient.OnConnectionFailedListener() {
    @Override
    public void onConnectionFailed(ConnectionResult arg0) {
    }
};

public static synchronized void buildGoogleApiClient(Context c) {
    try {

        mContext = c;
        mGoogleApiClient = new GoogleApiClient.Builder(c)
                .addConnectionCallbacks(ccb)
                .addOnConnectionFailedListener(odfl)
                .addApi(LocationServices.API)
                .build();

        mGoogleApiClient.connect();
    } catch (Exception ex) {
        Log.i("location", "error " + ex.toString());
        ex.printStackTrace();
    }
}

public static double getLatitude(Context c) {
    try {
        return mLastLocation.getLatitude();
    } catch (Exception ex) {
        return 0.0;
    }
}

public static double getLongitude(Context c) {
    try {
        return mLastLocation.getLongitude();
    } catch (Exception ex) {
        return 0.0;
    }
}
}

have you find any solution – M.Yogeshwaran Oct 14 '16 at 14:22 — M.Yogeshwaran, Oct 14 '16 at 14:22
@M.Yogeshwaran yes please check the answer below :) – Beeing Jk Oct 17 '16 at 03:58 — Beeing Jk, Oct 17 '16 at 03:58

Beeing Jk · Accepted Answer · 2017-11-16T01:50:22.583

It isn't because of the GPS thing but, the Location Settings is not enabled yet in the device, it is under your device Settings>Google>Services>Location, or Settings>Privacy&security>Location, or just Settings>Location. I got confused because in some device the drop-down status bar shows GPS enabling button and some shows Location enabling button. There is a way to enable the Location Settings automatically (without navigating user to device settings), it solved my issue, hope it helps you:

After GoogleApiClient is connected, do a Location Settings checking as below:

public static GoogleApiClient mGoogleApiClient;
private static PendingResult<LocationSettingsResult> result;
private static LocationSettingsRequest.Builder builder;
public static Location mLastLocation;
public static boolean isLocationON = false;

public static synchronized void buildGoogleApiClient(Activity a, Context c) {

    try {

        mActivity = a;
        mContext = c;
        mGoogleApiClient = new GoogleApiClient.Builder(c)
                .addConnectionCallbacks(ccb)
                .addOnConnectionFailedListener(odfl)
                .addApi(LocationServices.API)
                .build();

        builder = new LocationSettingsRequest.Builder()
                .addLocationRequest(locationRequest);
        builder.setAlwaysShow(true);

        mGoogleApiClient.connect();

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

private static GoogleApiClient.ConnectionCallbacks ccb = new GoogleApiClient.ConnectionCallbacks() {

    @Override
    public void onConnected(Bundle arg0) {
        checkLocationSettings();
    }

    @Override
    public void onConnectionSuspended(int arg0) {
    }
};

private static void checkLocationSettings() {

    result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());

    result.setResultCallback(new ResultCallback<LocationSettingsResult>() {

        @Override
        public void onResult(@NonNull LocationSettingsResult locationSettingsResult) {
            final Status status = locationSettingsResult.getStatus();
            switch (status.getStatusCode()) {
                case LocationSettingsStatusCodes.SUCCESS:

                    isLocationON = true;

                    if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                        return;
                    }
                    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);

                    if (mLocationSettingsListener != null) {
                        mLocationSettingsListener.onLocationON();
                    }

                    break;

                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:

                    isLocationON = false;

                    try {
                        // This line will check the result and prompt a dialog if the device location settings is not enabled
                        status.startResolutionForResult(mActivity, REQUEST_CHECK_SETTINGS);

                    } catch (IntentSender.SendIntentException e) {
                    }
                    break;

                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    isLocationON = false;
                    // Location settings are unavailable so not possible to show any dialog now
                    if (mLocationSettingsListener != null) {
                        mLocationSettingsListener.onLocationError();
                    }
                    break;
            }
        }
    });
}

Thanks @BeeingJK is it possible to run this stuff in background — M.Yogeshwaran, Oct 18 '16 at 04:37
You can use a service to run it in background. An instant example of location service [here](http://stackoverflow.com/a/34919769/4665578) (I never tried), it includes the function of Google Play Services checking and location update listener, same thing you can do the `checkLocationSettings` after GoogleApiClient is connected, before requesting location. But for `startResolutionForResult`, you probably need a dialogActivity since it requires an activity to prompt the dialog. To simplify it I just put the stuff in a class and call from activity, and make a call back when location is ON — Beeing Jk, Oct 18 '16 at 07:34
@BeeingJk But your question was how to get location without enabling GPS.But here you are enabling gps.is'nt it? — Rohit Bandil, Feb 16 '17 at 16:30

score 0 · Answer 2 · answered Aug 30 '16 at 11:37

0

Through Google Api i think it's not possible. for that you need to use some api for ip geolocation or you may use MNC-Mobile network location or MCC-Mobile country code through this you can get. It may help you.

answered Aug 30 '16 at 11:37

user6615010

122
1
12

thanks for reply, do your 'not possible' mean `Google Fused Location` cannot get device location without GPS on? But it works in other device – Beeing Jk Sep 01 '16 at 05:31

score 0 · Answer 3 · edited May 23 '17 at 10:27

Th following explains the not returning any location value part:
LocationRequest.PRIORITY_NO_POWER:

No locations will be returned unless a different client has requested location updates in which case this request will act as a passive listener to those locations.

For FusedLocationProvider,

no explicitly unique source is specified anywhere within documentation.

So for obtaining the location without enabling GPS, you can trust PRIORITY_BALANCED_POWER_ACCURACY. From what i have observed, only PRIORITY_HIGH_ACCURACY uses GPS in a mandatory fashion.

A tablet could be wifi-only or not have a sim which, unlike other devices, rules out the scenario of location being obtained by other apps – maybe using the network.

thanks for your explanation, I have replaced `PRIORITY_NO_POWER` with `PRIORITY_BALANCED_POWER_ACCURACY`, but still the tablet return NULL when its Location is off, any idea about it ? — Beeing Jk, Sep 01 '16 at 05:29

score 0 · Answer 4 · answered Jun 23 '17 at 10:42

0

You have to set Location accuracy to Device Only in the emulator. High Accuracy or Battery Saving will not work with FusedLocationProviderApi in the emulator.

answered Jun 23 '17 at 10:42

Ali Kazi

1,561
1
15
22

Android: Google Fused Location doesn't work while location is turned off

4 Answers4