Develop Reference

Why is mock location jumping back to real position

I added a test provider using LocationManager.GPS_PROVIDER as provider name like described here
https://mobiarch.wordpress.com/2012/07/17/testing-with-mock-location-data-in-android/
In Google Maps app, I see location jumping between mocked location and real location, and then back to mocked location.
Why is jumping to real location and how can I stop it?
Maybe I misunderstand how to use mock locations. I haven't found any official documentation available.

You most likely have your location settings configured in a way that your phone (and apps) can use both the location from the GPS sensor and the location from the cells and wi-fi. Since the coming of the Fused Location Provider, the way the system fetches your location got a bit murkier.
When you mock the position you are only able to mock the GPS sensor readings (this is also true for when you mock the position through the simulator settings).
So when the system feeds Google Maps with a position from the GPS sensor it gives it the fake one, and when it provides the position from other sensors it will be the real one.
To test that I'm correct, you can switch location settings to "Device only" and you should only get the fake positions.
Unfortunately there's no way to mock the other sensors readings.

Turn off Wi-Fi scanning / Bluetooth scanning in the Location Settings to stop jumping to preserve mock location.

Getting location using wifi only

I am developing an android application in which i want to use wifi only to find user's location is it possible to find location of your device just by using Wifi ?
In this app i m trying to guide user to go from one place to another inside a building so i want exact location cell tower location or gps location will not be of any help

LocationManager.NETWORK_PROVIDER will use either Wifi or cell tower location (not GPS). If you want the best location, that would be fine GPS (wifi is the least accurate.) You can ask the LocationManager to getBestProvider and require fine GPS with:
criteria.setAccuracy(Criteria.ACCURACY_FINE);

Based on your latest comment, I think you would like to guide a user inside a building and somehow get more accurate locations than a gps location (which would probably not be accurate inside a building anyway). While there may be some specific situation in which this would be possible, I would say no, there is not a general solution that could be applied.

For Current Location, using GPS is highly recommended. Because with only Wifi, it will not be accurate. But still you can use this:
String uriName = "geo:"+ lat+ "," + lon+ "?q=my+street+address";
startActivity(new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(uriName)));
This should work with roughly accuracy.

I think you want to guide the user while inside the building, if so, then I don't think that GPS or Wifi will be able to help you.
GPS provides a very fine location but require clear contact with the gps satellites in the space which won't be available inside buildings. Also the accuracy is within some meter distance which won't be effective in your case.
Cellular wifi will provide you location using the nearby cell tower which i think is self explanatory in your case. So, I don't think that both location services will of use in your case.

How to force android's locationlistener to fetch provider location?

I have written a small app that receives the location from mobile 3g/wifi by using locationManager & NETWORK_PROVIDER parameter.
according to google's api it will get the location i wish (the other option is using the GPS_PROVIDER)
what i really desired was the WIFI location. I wanted to see its behavior and how the phone gets its location (i.e with wireshark)
in order to do that, i changed into flight mode & activated wifi.
then, i launched the app and clicked the button which starts the NETWORK_PROVIDER location service by calling the requestLocationUpdates function with time parameter = 10.
what that actually happened is that i managed to get the location but saw no traffic at all in wireshark.
could it be that Google gives me the approx. location in advance, when connecting to the wifi? (its the only explenation)
If so, is it possible to clear that cache, or whatever data it have stored, and force the phone to get a new (but the same) location?
Thanks in advance,
Eran.

Have you tried re-booting the phone, just so to remove any cache files which might be storing the location?

Since NETWORK_PROVIDER use cell location, wifi ssid and their signal strength to get your GPS coordinates.
Since you are in flight mode and cannot get cell location, just try to switch the connected wifi , maybe google service will be invoked to get new location.

in android is it possible to find latitude and longitude using wifi?

In my Application i need to use user's current location.
Through GPS, i knw how to do it but can any body have idea that how it can be done using Wifi?
Pls do my help,
thanks.

Have a look at the Android Obtaining User Location documentation - especially the usage of the NETWORK_PROVIDER.

How to get latitude and longitude values from Cell Id in android?

I am developing a android application in that i want find the user location using GPS. That is working fine .But if the GPS is Disabled means i want to find the user location based on the CellID and Loc .It is possible or not
It is possible means please tell me how to do that with sample code
Waiting for reply

Just request the "best" location provider, and you'll either get the GPS if it's available or the network (wifi / cell) if it's not.
LocationManager.getBestProvider()
You don't need to explicitly code to either GPS / network providers.

Here is complete tutorial of Location-Based Services Using CellID in Android.