A project to showcase handling Android's System Events with Broadcast Receiver API
- Is great for listening system events that deals with changes in phone state.
- When something is changed in the phone state, an intent is created by the Android OS to manage the switch from your app to phone app.
- So, Broadcast Receivers are the receivers of Broadcast Intents
- Thus System events are handled using an intent-based pub-sub mechanism.
- Technically speaking, Broadcast Receivers registers for certain intents with the Android System and gets notified when intent happens (say, when SMS arrives, when phone rings, etc).
- Grant permission to the app to deal with that system level event by configuring permissions in app's manifest file using
<uses-permission>tag - Create a Java class that extends
BroadcastReceiverand implementsonReceive(Context context, Intent intent). This class acts as the event handler for the said event - Register the Broadcast Receiver Java class in the app’s manifest file using
<receiver>tag (You can also do this programatically, but the manifest file thingy is easier)