doubt in using Location Listener

I have used LastKnownLoaction at the start-up Activity of my app to get the location ,if it returns null then i register for a Location Listener for both gps and network providers.After requesting for Listener to listen for any location change i switch over to main Activity page using startActivity.Further in the startup Actyivity's onLocation in both Listener i am trying to get location and if any values found then i try to store them in preference and remove updated from both listener and notify the user about the location being upda开发者_如何学Pythonted.

Is this logic is correct way of coding ,do the listener listen for location update when its no longer on the top of the stack ,hence i am using a emulator i couldn't test gps functionality,i required your suggestions on this

thanks

You shouldn't register a LocationListener only if getLastKnownLocation() returns null, because that means the particular location provider is disabled. Also caching a real-time value like location doesn't sound like a good design. I would suggest to register/unregister LocationListener for each Activity in it's onStart/onStop methods.