Book Image

Android High Performance Programming

By : Emil Atanasov, Enrique López Mañas, Diego Grancini
Book Image

Android High Performance Programming

By: Emil Atanasov, Enrique López Mañas, Diego Grancini

Overview of this book

Performant applications are one of the key drivers of success in the mobile world. Users may abandon an app if it runs slowly. Learning how to build applications that balance speed and performance with functionality and UX can be a challenge; however, it's now more important than ever to get that balance right. Android High Performance will start you thinking about how to wring the most from any hardware your app is installed on, so you can increase your reach and engagement. The book begins by providing an introduction to state–of-the-art Android techniques and the importance of performance in an Android application. Then, we will explain the Android SDK tools regularly used to debug and profile Android applications. We will also learn about some advanced topics such as building layouts, multithreading, networking, and security. Battery life is one of the biggest bottlenecks in applications; and this book will show typical examples of code that exhausts battery life, how to prevent this, and how to measure battery consumption from an application in every kind of situation to ensure your apps don’t drain more than they should. This book explains techniques for building optimized and efficient systems that do not drain the battery, cause memory leaks, or slow down with time.
Table of Contents (17 chapters)
Android High Performance Programming
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Android Instant Run


At the time of writing, Google released Android Studio 2.2 Preview. This is (as the name suggests) the second major version of Android Studio, and it comes with many fixes, performance improvements, and an awesome tool called Android Instant Run. This tool allows us to perform changes in the code and display them instantly in our device or emulator. This is a priceless feature when we are debugging, since we do not need to recompile the application, start it again, and reconnect it to adb.

To activate this option, we need to go to Preferences, then look for Build, Execution, Deployment | Instant Run. Check Enable Instant Run to hot swap code/resource changes on deploy (default enabled); if you are running the right version of the Gradle plugin, you will be able to activate it:

To run an application, select Run so Android Studio operates normally. Now comes the interesting part: after you have performed edits or modifications on your source code, clicking Run once more will...