finding users latitudes and longitudes inside closed location

I have been working on an android app to find the location of the user device even he is in the closed location.

I am trying to use the following code:

LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String p开发者_C百科rovider = lm.getBestProvider(criteria, true);
Location location = lm.getLastKnownLocation(provider);

by using this code i was able to get the locations when i go to the open sky but not in the room.

please let me know how if any thing is unclear.

Thanks in advance.

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You cannot get standard GPS while you are inside. If you own/control a particular building then you could set up some sort of transmitters inside of the building that would help you triangulate their position. Otherwise, you are out of luck.