Android 9 Development Cookbook - Third Edition

How it works...

When the device boots, Android will send the BOOT_COMPLETED intent. As long as our application has the permission to receive the intent, we will receive notifications in our Broadcast Receiver.

There are three aspects to make this work:

• A permission for RECEIVE_BOOT_COMPLETED
• Adding both BOOT_COMPLETED and DEFAULT to the receiver intent filter
• Checking for the BOOT_COMPLETED action in the Broadcast Receiver

Obviously, you'll want to replace the Toast message with your own code, such as for recreating any alarms you might need.