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get location coordinates without GPS

My question is can you get location coordinates latitude and longitude using WIFI or any other source when location is off or disabled. Basically I want to get current location when the GPS is not enabled

If location permission isn't granted or location settings are off, no. That's on purpose- the user doesn't want to give you their location, respect that. Now if it's just GPS but not location that's off you can use coarse location. That uses wifi only, is less accurate, but can be used with less battery drain than GPS.

Android NETWORK_PROVIDER locationManager

In my app I am using location services to obtain the user location coordinates to compare the distance to the objects which are obtained from my server.
So the user must have internet connection ON due to data obtained from server.
So in that case, I decided not to use GPS_PROVIDER, but only NETWORK_PROVIDER for user location, as the user needs to have internet connection, and this is quicker as GPS.
isNetwork = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
Till now I checked if isNetwork exists then do the stuff for NETWORK_PROVIDER, else try GPS_PROVIDER.
Now the question is, if the internet connection is always on, do I still need also GPS_PROVIDER?
I just want to get rid of the part of code for GPS, so I want to be sure, if the user has internet connection ON, the NETWORK_PROVIDER will always work.
To shorten the question: does NETWORK_PROVIDER depend from active internet connection? Does the user need to enable the device location in Settings for using just NETWORK_PROVIDER and not GPS?

FusedLocationProviderAPI not receiving location if GPS is off

I need to run a service continuously to update my location data to server, I am using FusedLocationProviderAPI to retrieve location and priority as PRIORITY_BALANCED_POWER_ACCURACY, but when GPS is switched off no location is received.
I thought fused provider manages this based on the priority given, but that is not the case, can anyone tell me what can be done to solve this.
Thanks.

Turning off the location on your device turns off all the location services. If you go to Settings -> Location -> Mode you'll see the location options. Switch it to "Battery saving (Networks only)" if you don't want to use the GPS.

in android, GPS_PROVIDER works, but NETWORK_PROVIDER does not

I am building an android application.
I can get GPS coordinates fine using
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
But when I try to use the network provider (editing the line, not doing two registers)
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0,0,locationListener);
I get no coordinates.
I am checking if I have coordinates doing a println(location.toString()) inside the locationListener.
Both GPS and WIFI location are enabled on the device (and, as far as I can tell, other applications manage to use WIFI location)
Am I missing something? Is there a special procedure to use NETWORK_PROVIDER ?
(I have only "fine location" permissions, but the docs explicitly say this also allows "coarse location")

gps –> (GPS, AGPS): Name of the GPS location provider. This provider determines location using satellites. Depending on conditions, this provider may take a while to return a location fix. Requires the permission android.permission.ACCESS_FINE_LOCATION.
network –> (AGPS, CellID, WiFi MACID): Name of the network location provider. This provider determines location based on availability of cell tower and WiFi access points. Results are retrieved by means of a network lookup. Requires either of the permissions android.permission.ACCESS_COARSE_LOCATION or android.permission.ACCESS_FINE_LOCATION.

If GPS cannot fetch location, switch to network in Android

I am trying to get location based on GPS or network but the problem is that if I take based on GPS location it takes lot of time to fetch the location details. Hence I would like implement a method where if GPS signal is very low fetch location using network provider. How do I determine the GPS signal? if do there is problem with this? GPS signal is always low even in open sky and hence it would always get to network provider?
How do I fix this problem?

Are you polling the location with LocationManager.GetLastKnownLocation, or are you getting updates asynchronously via requestLocationUpdates?
For the first, query for the location with the GPS_PROVIDER. If it returns null, then query for NETWORK_PROVIDER
If you're getting notifications, request both. Then you can implement onStatusChanged to tell when the GPS is available or not, and ignore network updates if it is, or use them if not (the location object tells you what the provider was).

Adding lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, ll); it will start fetching the gps using networ. Using location.getProvider() you should be able to differentiate to know whether its gps or network.