Android 9 Development Cookbook - Third Edition

How it works...

Just like in the previous recipe on sending SMS messages, we first need to check whether the app has permission. (On pre-Android 6.0 devices, the manifest declaration will automatically provide the permission, but for Marshmallow and later, we'll need to prompt the user as we do here.)

As you can see, the Broadcast receiver receives the notification of new SMS messages. We tell the system we want to receive the new SMS Received Broadcasts using this code in the Android Manifest:

<receiver android:name=".SMSBroadcastReceiver">    <intent-filter>        <action android:name="android.provider.Telephony.SMS_RECEIVED"/>    </intent-filter></receiver>

The notification comes in through the standard onRecieve() callback so we check the action ...