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Asynchronous Android Programming - Second Edition

You're reading from  Asynchronous Android Programming - Second Edition

Product type Book
Published in Jul 2016
Publisher Packt
ISBN-13 9781785883248
Pages 394 pages
Edition 2nd Edition
Languages
Author (1):
Steve Liles Steve Liles
Profile icon Steve Liles

Table of Contents (19) Chapters

Asynchronous Android Programming Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
1. Asynchronous Programming in Android 2. Performing Work with Looper, Handler, and HandlerThread 3. Exploring the AsyncTask 4. Exploring the Loader 5. Interacting with Services 6. Scheduling Work with AlarmManager 7. Exploring the JobScheduler API 8. Interacting with the Network 9. Asynchronous Work on the Native Layer 10. Network Interactions with GCM 11. Exploring Bus-based Communications 12. Asynchronous Programing with RxJava Index

Executing AsyncTasks


Having implemented doInBackground and onPostExecute, we want to get our task running. There are two methods we can use for this, each offering different levels of control over the degree of concurrency with which our tasks are executed. Let's look at the simpler of the two methods first:

  public final AsyncTask<Params, Progress, Result> execute(Params...
  params)

The return type is the type of our AsyncTask subclass, which is simply for convenience so that we can use method chaining to instantiate and start a task in a single line and still record a reference to the instance:

   class MyTask implements AsyncTask<String,Void,String>{ ... }
   MyTask task = new MyTask().execute("hello");

The Params... params argument is the same Params type we used in our class declaration, because the values we supply to the execute method are later passed to our doInBackground method as its Params... params arguments. Notice that it is a varargs (variable number of parameters...

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