How to tell if an Android device will be able to provide a location? -

i'm writing geo app , works nicely, i'm considering how it'll work on devices don't have gps or 3g, , wifi may off or not provide location info.

is best bet request location update (or use last known) , assume there way location (whether gps or network) or framework include way see what's available, , avoid geo-lookup delay?

i figure on device no gps app should provide ui user specify location, , remember in sharedprefs don't have keep re-entering (i'm thinking devices google tv, , tablets).

i'd appreciate suggestions on how handle process of acquiring location in context of various devices have different levels of geo-awareness, , how handle that.

you can invoke locationmanager.getallproviders() retrieve location providers, or invoke locationmanager.getproviders(true) retrieve active location providers.

boolean hasactivelocationprovider = false; locationmanager locationmanager = context.getsystemservice(context.location_service); list<string> providers = locationmanager.getproviders(true); (string providername:providers) {   if (providername.equals(locationmanager.gps_provider)        || providername.equals(locationmanager.network_provider)) {     hasactivelocationprovider = true;   } } 

http://developer.android.com/reference/android/location/locationmanager.html