Book Image

Xamarin Mobile Development for Android Cookbook

By : Matthew Leibowitz
Book Image

Xamarin Mobile Development for Android Cookbook

By: Matthew Leibowitz

Overview of this book

Xamarin is used by developers to write native iOS, Android, and Windows apps with native user interfaces and share code across multiple platforms not just on mobile devices, but on Windows, Mac OS X, and Linux. Developing apps with Xamarin.Android allows you to use and re-use your code and your skills on different platforms, making you more productive in any development. Although it’s not a write-once-run-anywhere framework, Xamarin provides native platform integration and optimizations. There is no middleware; Xamarin.Android talks directly to the system, taking your C# and F# code directly to the low levels. This book will provide you with the necessary knowledge and skills to be part of the mobile development era using C#. Covering a wide range of recipes such as creating a simple application and using device features effectively, it will be your companion to the complete application development cycle. Starting with installing the necessary tools, you will be guided on everything you need to develop an application ready to be deployed. You will learn the best practices for interacting with the device hardware, such as GPS, NFC, and Bluetooth. Furthermore, you will be able to manage multimedia resources such as photos and videos captured with the device camera, and so much more! By the end of this book, you will be able to create Android apps as a result of learning and implementing pro-level practices, techniques, and solutions. This book will ascertain a seamless and successful app building experience.
Table of Contents (20 chapters)
Xamarin Mobile Development for Android Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Updating the app


Once an app has been released, we will want to provide additional features or fix any bugs. We can easily do this by uploading a later version of our app to Google Play.

Getting ready

When we want to update an app, we will need to ensure that our new app will have the same package name and can be signed by the same keystore.

How to do it...

Releasing updates to an existing app on Google Play is straightforward, only requiring that the version numbers be increased besides any code changes:

  1. The Version number field needs to be a greater integer value than the current release, and the Version name field should be a higher semantic version:

    Increasing the app version numbers

  2. Next, we must archive and sign the app package in the same manner as with the previous release.

  3. Then, we go to the APK section in the dashboard of the app we want to update. On the Alpha tab, click on the Upload new APK to Alpha button.

  4. In the dialog that appears, browse to and select the APK that we just packaged...