Book Image

Android 9 Development Cookbook - Third Edition

By : Rick Boyer
Book Image

Android 9 Development Cookbook - Third Edition

By: Rick Boyer

Overview of this book

The Android OS has the largest installation base of any operating system in the world. There has never been a better time to learn Android development to write your own applications, or to make your own contributions to the open source community! With this extensively updated cookbook, you'll find solutions for working with the user interfaces, multitouch gestures, location awareness, web services, and device features such as the phone, camera, and accelerometer. You also get useful steps on packaging your app for the Android Market. Each recipe provides a clear solution and sample code you can use in your project from the outset. Whether you are writing your first app or your hundredth, this is a book that you will come back to time and time again, with its many tips and tricks on the rich features of Android Pie.
Table of Contents (24 chapters)
Title Page
Copyright and Credits
Dedication
About Packt
Contributors
Preface
Index

Receiving notification of device boot


Android sends out many intents during its lifetime. One of the first intents sent is ACTION_BOOT_COMPLETED. If your application needs to know when the device boots, you need to capture this intent.

This recipe will walk you through the steps required to be notified when the device boots.

Getting ready

Create a new project in Android Studio and call it DeviceBoot. Use the default Phone & Tablet option and select Empty Activity when prompted for Activity Type.

How to do it...

To start, open the Android Manifest and follow these steps:

  1. Add the following permission:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
  1. Add the following <receiver> to the <application> element, at the same level as the existing <activity> element:
<receiver android:name=".BootBroadcastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
        <category android:name...