In FCM trying to get a latitude and longitude of a person, wherever he/she get a notification to him/her in android

Question

I am using FCM and getting a notification too, in that trying to get a latitude and longitude of a person, wherever he or she gets a notification to him or her without entering an application in android but getting 0.0 in latitude and longitude.

I am not done anything in MainActivity because get a location in the background and send that to a server

Below is my MyFirebaseMessagingService code:

public class MyFirebaseMessagingService extends FirebaseMessagingService implements PowerConnectionReciever.BatteryCallback 
{

LocationTrack locationTrack;
private double longitude,latitude;
Context context=this;
IntentFilter intentfilter;
private PowerConnectionReciever powerConnectionReciever=new 
PowerConnectionReciever();
private String batterystatus;
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    // ...


    Log.wtf(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.wtf(TAG, "Message data payload: " + remoteMessage.getData());

        if (/* Check if data needs to be processed by long-running job */ true) {
            // For long-running tasks (10 seconds or more) use Firebase Job Dispatcher.
           // scheduleJob();

        } else {
            // Handle message within 10 seconds
           // handleNow();

        }

    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.wtf(TAG, "Message Notification Body: " + 
         remoteMessage.getNotification().getBody());
        Log.wtf("Status","Message arrived");
        intentfilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        locationTrack = new LocationTrack(context);

        if (locationTrack.canGetLocation()) {

            longitude = locationTrack.getLongitude();
            latitude = locationTrack.getLatitude();

            context.registerReceiver(powerConnectionReciever, intentfilter);

            Toast.makeText(this, "Locatin"+latitude+","+locationTrack, Toast.LENGTH_SHORT).show();
        } else {

            locationTrack.showSettingsAlert();
        }


    }

    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.
}

@Override
public void batteryInfo(boolean isCharging, boolean status, int percent) {
    Toast.makeText(getApplicationContext(), "Longitude:" + Double.toString(longitude) + "\nLatitude:" + Double.toString(latitude) + "\nBattery status:" + percent+"%", Toast.LENGTH_SHORT).show();

    batterystatus = "isCharging: " + isCharging + "\n" + "\n" +
            "isCharged:" + status + "\n" + "\n" +
            "Percent: " + percent + "\n";

    Log.wtf("BStatus", batterystatus);
    }
   }

LocationTrack Class code:

public class LocationTrack extends Service implements LocationListener {

private final Context mContext;
boolean checkGPS = false;
boolean checkNetwork = false;
boolean canGetLocation = false;
Location loc;
double latitude;
double longitude;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;
protected LocationManager locationManager;

public LocationTrack(Context mContext) {
    this.mContext = mContext;
    getLocation(mContext);
}

private Location getLocation(Context mContext) {

    try {
        locationManager = (LocationManager) mContext
                .getSystemService(LOCATION_SERVICE);

        // get GPS status
        checkGPS = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // get network provider status
        checkNetwork = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (!checkGPS && !checkNetwork) {
            Toast.makeText(mContext, "No Service Provider is available", Toast.LENGTH_SHORT).show();
        } else {
            this.canGetLocation = true;

            // if GPS Enabled get lat/long using GPS Services
            if (checkGPS) {

                if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, 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.
                }
                locationManager.requestLocationUpdates(
                        LocationManager.GPS_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                if (locationManager != null) {
                    loc = locationManager
                            .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                    if (loc != null) {
                        latitude = loc.getLatitude();
                        longitude = loc.getLongitude();
                    }
                }


            }


            if (checkNetwork) {

                if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, 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.
                }
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                if (locationManager != null) {
                    loc = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                }

                if (loc != null) {
                    latitude = loc.getLatitude();
                    longitude = loc.getLongitude();
                }
            }

        }


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

    return loc;
}

public double getLongitude() {
    if (loc != null) {
        longitude = loc.getLongitude();
    }
    return longitude;
}

public double getLatitude() {
    if (loc != null) {
        latitude = loc.getLatitude();
    }
        return latitude;
}

public boolean canGetLocation() {
    return this.canGetLocation;
}

public void showSettingsAlert() {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);


    alertDialog.setTitle("GPS is not Enabled!");

    alertDialog.setMessage("Do you want to turn on GPS?");


    alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });


    alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });


    alertDialog.show();
}


public void stopListener() {
    if (locationManager != null) {

        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, 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;
        }
        locationManager.removeUpdates(LocationTrack.this);
    }
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onLocationChanged(Location location) {

}

@Override
public void onStatusChanged(String s, int i, Bundle bundle) {

}

@Override
public void onProviderEnabled(String s) {

}

@Override
public void onProviderDisabled(String s) {

}
}

take help from this answer just go throw it https://stackoverflow.com/questions/46321106/after-enable-gps-from-an-app-prompt-how-to-refresh-and-get-the-current-location/46321722#46321722 — Vishal Yadav, Mar 09 '18 at 06:40
Hi vishal, like you said I can get a location but my requirement is getting lat and lng without human intervention, without going to an app I should get a lat and lng, when the notification gets to arrive at a handset and in the background only have to send lat and lng to sever. Hope you will understand what i am saying.! — Manjunath Narasannavar, Mar 09 '18 at 06:46
@ManjunathNarasannavar Are you sending **data only** message when app is in background? — global_warming, Mar 09 '18 at 07:04
@global_warming No I have to send a lat and lng to a server but in that code I am not sending to a server because latitude and longitude is getting 0.0 — Manjunath Narasannavar, Mar 09 '18 at 07:16
@global_warming Yes but my requirement is once a notification gets into a handset, without any user interaction, has to get a lat and lng of a notification where a user gets received — Manjunath Narasannavar, Mar 09 '18 at 07:28
@global_warming Yes for testing I am sending through FCM console — Manjunath Narasannavar, Mar 09 '18 at 07:34

global_warming · Answer 1 · 2018-03-13T09:58:16.037

0

Reason why you aren't getting lat-long when app is in background:

-->> You are Sending message from Firebase console

-->> Message contains notification payload.

-->> If app is in background, FCM notification is displayed in notification tray but onMessageReceived() is not called and it never fetches lat-long from LocationTrack.

-->> Results into 0.0

The solution is to send data only FCM message from server as you can't send data only message from Firebase Console. In that case onMessageReceived() will be called even when app is in background.

If you want to send data only payload to particular device id, send JSON like:

{ 
 "message":
     { 
      "token":"yourDeviceToken",
      "data":
          {      
           "keyFoo":"valueBar"   
          },
       "android":
          {
           "priority":"high"
           "ttl":"3600s"
          }
     }
}

edited Mar 13 '18 at 09:58

answered Mar 09 '18 at 07:52

global_warming

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1
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Oops..! Thank for the solution, I'll try it and let's come back to you.! – Manjunath Narasannavar Mar 09 '18 at 07:57
I am using "https://fcm.googleapis.com/fcm/send" URL and getting a response: { "message_id": 570327904788888888 } but notification is not coming to devices. what would be the issue? – Manjunath Narasannavar Mar 09 '18 at 12:40
are you sending data only? can you post json you are sending from server? – global_warming Mar 09 '18 at 12:42
Yes, { "to":"/topics/testdata", "data": { "message":"Test msg" } } – Manjunath Narasannavar Mar 09 '18 at 12:57
Are you getting this in app? – global_warming Mar 09 '18 at 12:58
And one more thing whenever I am sending to particular device, it is showing error like this: { "multicast_id": 6674088888888888888, "success": 0, "failure": 1, "canonical_ids": 0, "results": [ { "error": "MismatchSenderId" } ] } – Manjunath Narasannavar Mar 09 '18 at 12:59
Nope, in postman Body i am sending like this { "to":"/topics/testdata", "data": { "message":"Test msg" } }, for this i am getting response too, this is response { "message_id": 570327904788888888 } but notification is not coming to devices – Manjunath Narasannavar Mar 09 '18 at 13:01
you won't get notification in this case, check device log for incoming data payload. – global_warming Mar 09 '18 at 13:03
Then there must be some error in server side implementation – global_warming Mar 09 '18 at 13:12
If there is an error then it will not give a proper response like this{ "message_id": 570327904788888888 }, it may give some error response, So don't know what would be the error exactly. – Manjunath Narasannavar Mar 09 '18 at 13:18
Getting response like this " Expected 'r' instead of 'o' " – Manjunath Narasannavar Mar 09 '18 at 13:32
How do we find whether a app is gets called onMessageReceived in background or killed? – Manjunath Narasannavar Mar 13 '18 at 09:42
Firebase SDK will manage that even if app is killed(not force stop), you can see logs will appear in logcat. – global_warming Mar 13 '18 at 09:44
I am sending notification data from POSTMAN, there I am getting acknowledgment but the notification is not coming to devices, But Sending notification from FCM console getting FCM notification to devices. – Manjunath Narasannavar Mar 13 '18 at 09:50
When an app is open, FCM notification is not coming to a device but in the log, i can see the details of the notification. – Manjunath Narasannavar Mar 13 '18 at 09:53
Try sending high priority message. Which phone are you using for testing? – global_warming Mar 13 '18 at 09:55
I have edited json data for high priority, check that – global_warming Mar 13 '18 at 09:58
Below devices which I am testing my app:Panasonic T44 and Coolpad Note – Manjunath Narasannavar Mar 13 '18 at 10:01
I am not able to receive the notification – Manjunath Narasannavar Mar 13 '18 at 10:11
I am using the local notification to cross-check whether an onMessageReceived getting called or not, but whenever an app is open then I am getting a local notification, when the app is in the background or killed not getting that local notification, I don't know what is going on???? – Manjunath Narasannavar Mar 13 '18 at 10:17
You don't get notifications in case of data-only message, you have to check logcat. Try testing on different devices. – global_warming Mar 13 '18 at 10:24

In FCM trying to get a latitude and longitude of a person, wherever he/she get a notification to him/her in android

1 Answers1