退出应用程序后（即按下主屏幕按钮），Android ProximityAlert无法保持活动状态

Question

I am able to set a proximity alert (ie generates a notification when the phone enters/exits specified radius) which works as I want only when I still have the app up. When I click home, the radius exit/enter conditions which normally fire the alert do not result in a notification.

I am pretty sure it has something to do with registering and unregister receivers, but I cannot figure it out. When I don't include a call to unregisterReceiver and press home, a leaked receiver error appears. When I include it in onPause() and click home, I get no errors, but the alert doesn't work.

Is there something I am not understanding about these proximity alerts? What is the best way to have an app respond to proximity as I wish it to?

Answer 1

Register your BroadcastReceiver in the Manifest file. It will automatically register and unregister itself.

<receiver android:name="ProximityIntentReceiver">
    <intent-filter>
        <action android:name="com.example.googlemaps.PROXIMITY_ALERT">
    </intent-filter>
</receiver> 

It will work even after the home button is pressed.

Answer 2

Register pending intent instead of receiver. They survive application shutdown