How to determine the most accurate location on Android?

Question

Android

Prompt a widget on the home screen (or several programs with a widget output) that would display the exact address of the location, using information received via 3G, Wi-Fi and GPS.

Answer 1

The location obtained by processing information from 3G, Wi-Fi and GPS (and more sensors) is the most accurate, yes. That's just the phone will work in this mode for 4 hours, no more (I checked). It would be strange to have such a battery as a widget.