Using Android to keep tabs on your girlfriend. With her consent, of course! – HackMag
Amazon.com: Single Din Android Car Stereo, 10.1 inch Floating Touch Screen Bluetooth Car Radio Bluetooth, WiFi, GPS Navigation, Android iOS Mirror Link Backup Camera FM Mic Car Player : Electronics
A broadcast receiver is an Android application component which allows you to register for system generated or application events.
Android Broadcast Receivers with Example – Android Clarified
Using Android to keep tabs on your girlfriend. With her consent, of course! – HackMag
Android Broadcast Receiver Example
Android BroadcastReceiver Example Tutorial | DigitalOcean