geofencing - Android: Trigger an event when the user exits a geofence -

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is there way define geofence (center , radius) around device's current location, , have system trigger callback function in app when device exits geofence?

i avoid extensive gps usage, prefer system message on periodic gps polling, @ price of reduced accuracy.

use geofence api in google play services. here can find documentation use it. can have 100 geofences @ time.


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