Develop Reference

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.

How do I know the provider pf LocationManager's GPS retrieval?

I am trying to log information about how the app is fetching the coordinates. This is the code I used to grab the coordinates.
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
location = locationManager.getLastKnownLocation(locationManager.NETWORK_PROVIDER);
My question is, how do I find out the source of the coordinates? (GPS, Network Triangulation, Wifi, etc. )
In other words, getLastKnownLocation returns coordinates from multiple sources, how do I get a string name of the source?

You use NETWORK_PROVIDER. This provider determines location based on availability of cell tower and WiFi access points. Results are retrieved by means of a network lookup.
GPS_PROVIDER determines location using satellites.

How can I get the current city name for an Android device without using GPS?

I am currently able to get the city name in an Android application using GPS or network provider.
I tried with LocationManager, but if GPS is off the location manager and location is null. To improve the battery performance I don't want to turn on the GPS.
Is there any way without turning on the GPS able to get the city name in an Android application? Or if GPS is off why is location manager returning null? How can I solve this?

Querying the following URL will give the current IP address and location in JSON:
http://ip-api.com/json
You can then parse that to extract the values you want.

Android GPS location isn't as accurate as network location

I've got an app which sets up two location listeners (one for GPS and one for network) and then chooses the location from the best one available, which should be GPS. However, if GPS is turned on, it will always choose the GPS location, even if the person starts the app up indoors. This has led to the GPS location being used even if the last known GPS location is from miles away and the network location is actually much more accurate.
Is there any way around this issue or is it just something that will need to be accepted as an issue with using GPS & network? Is the standard practice just to assume that GPS is always more accurate even though it's possible that it might not be in certain instances?

If you are using the network provider to fetch the location they are not very accurate when compared to GPS. So it can be a good idea to fetch the accuracy of your position using network provider when you are indoors as GPS doesnt function well indoors and you can use GPS to get the location updates when you are outdoor.
You can use GetAccuracy() method of Location class and see for the value it returns. Let Say if getAccuracy() retruns 25 then you can leave this value wait for another gps value until you get the desired value. Remember the value it returns is the radius of the circle in meters.

How to get latitude and longitude offline in android ?

I want to get current location (latitude & longitude) , when WiFi & Gps is off .It is possible to get latitude and longitude from mobile sim network. I searched more on google but i did not get satisfies answers.

Try This
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(location==null){
location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}

From my yesterday's experience on this question, I finally found out that it is impossible to fetch latitude longitude's value without Internet connection in device. ( Gosh I spent 3 hours to find why my running code working properly. ) Even to get the value from getLastKnowLocation() you must require Internet connection.

Pretty sure this is impossible. While you can store cell tower ID's to know when you're close to an area you've been in before, you can't actually use these values to get latitude and longitude numbers (Well, unless you stored some lat and long values and paired them with that cell tower). You can however call getLastKnownLocation() to... get the last known location from the GPS or Wifi.
Edit
Apparently google has built a database of lat/long with cellID's already. It is not part of the standard Android API, and requires a network connection to hit. Pretty cool though. You can find more at this (really slow) website