Book Image

Asynchronous Android

By : Steve Liles
Book Image

Asynchronous Android

By: Steve Liles

Overview of this book

With more than a million apps available from Google Play, it is more important than ever to build apps that stand out from the crowd. To be successful, apps must react quickly to user input, deliver results in a flash, and sync data in the background. The key to this is understanding the right way to implement asynchronous operations that work with the platform, instead of against it. Asynchronous Android is a practical book that guides you through the concurrency constructs provided by the Android platform, illustrating the applications, benefits, and pitfalls of each.Learn to use AsyncTask correctly to perform operations in the background, keeping user-interfaces running smoothly while avoiding treacherous memory leaks. Discover Handler, HandlerThread and Looper, the related and fundamental building blocks of asynchronous programming in Android. Escape from the constraints of the Activity lifecycle to load and cache data efficiently across your entire application with the Loader framework. Keep your data fresh with scheduled tasks, and understand how Services let your application continue to run in the background, even when the user is busy with something else.Asynchronous Android will help you to build well-behaved apps with smooth, responsive user-interfaces that delight users with speedy results and data that's always fresh, and keep the system happy and the battery charged by playing by the rules.
Table of Contents (14 chapters)
Asynchronous Android
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Chapter 6. Long-running Tasks with Service

In Chapter 5, Queuing Work with IntentService, we learned about a specialized subclass of Service that handles its workload on a single background thread.

In this chapter, we'll extend our toolkit by directly extending Service to take control of the level of concurrency applied to our long-running background tasks—how many threads are used to perform the work—and use various methods to send work to Services and receive results from them.

In this chapter, we will cover the following topics:

  • Building responsive apps with Service

  • Controlling concurrency with Executors

  • Returning results with Messenger

  • Direct communication with local Services

  • Broadcasting results with Intents

  • Detecting unhandled broadcasts

  • Applications of Services