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Mastering Android Development with Kotlin

You're reading from   Mastering Android Development with Kotlin Deep dive into the world of Android to create robust applications with Kotlin

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Product type Paperback
Published in Nov 2017
Publisher Packt
ISBN-13 9781788473699
Length 378 pages
Edition 1st Edition
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Author (1):
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Miloš Vasić Miloš Vasić
Author Profile Icon Miloš Vasić
Miloš Vasić
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Table of Contents (17) Chapters Close

Preface 1. Starting with Android FREE CHAPTER 2. Building and Running 3. Screens 4. Connecting Screen Flow 5. Look and Feel 6. Permissions 7. Working with Databases 8. Android Preferences 9. Concurrency in Android 10. Android Services 11. Messaging 12. Backend and API 13. Tuning Up for High Performance 14. Testing 15. Migration to Kotlin 16. Deploying Your Application

Doing it the Kotlin way

What happens if our application requires a lot of permissions that must be handled through the code? It happens that we have a lot of code handling different permission requests. This means that we have a lot of boilerplate code! Luckily for us, we are using Kotlin. Kotlin will be our tool to make things simpler!

Create a new package called permission. Then create two new Kotlin files as follows:

PermissionCompatActivity and PermissionRequestCallback.

Let's define the permission request callback as follows:

     package com.journaler.permission 
 
     interface PermissionRequestCallback { 
       fun onPermissionGranted(permissions: List<String>) 
       fun onPermissionDenied(permissions: List<String>) 
     } 

This will be the callback that will be fired when permissions are resolved. Then, define our permission compat activity...

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