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Asynchronous Android

You're reading from   Asynchronous Android As an Android developer you know you're in a competitive marketplace. This book can give you the edge by guiding you through the concurrency constructs and proper use of AsyncTask to create smooth user interfaces.

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Product type Paperback
Published in Dec 2013
Publisher Packt
ISBN-13 9781783286874
Length 146 pages
Edition 1st Edition
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Author (1):
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Steve Liles Steve Liles
Author Profile Icon Steve Liles
Steve Liles
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Toc

Communicating with Services


In all of our dealings with Services so far, we have initiated work by invoking startService with an Intent, but that isn't our only option. If our Service is designed to only be used locally from within our own application process, we can take significant shortcuts and work with Service just as we do with any other Java object.

Direct communication with local Services

To create a Service that we can interact with directly, we must implement the onBind method that we previously ignored and from which we returned null. This time, we'll return an implementation of IBinder that provides direct access to the Service it binds. We'll always return the same IBinder as shown in the following code:

public class LocalPrimesService extends Service {
  public class Access extends Binder {
    public LocalPrimesService getService() {
      return LocalPrimesService.this;
    }
  };
  private final Access binder = new Access();

  @Override
  public IBinder onBind(Intent intent...
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