lwc:programming:mobile:android:runnable [wiki]

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===== Runnables and you =====
There's nothing special about a Runnable. It's doesn't have anything to do with threads. All it is is an interface, that's it:
<code Java>
  public class MyRunnable implements Runnable {

    public void run(){
       Log.v("MyRunnable running");
    }
  }
</code>
The interface takes no parameters and returns no parameters. When started it will run whatever magical stuff you put in the ''run'' method. Besides the run method you can have a constructor if the spirit moves you.

You can create a runnable so you have something to send on a separate thread. You don't need a runnable to do it, it's just standard convention everybody seems to have agreed upon.
Here's a nice friendly runnable to play with:
<code Java>
  public class MyRunnable implements Runnable {

    public void run(){
       Log.v("test","MyRunnable running");
    }
  }
</code>
3 ways to create an instance of this runnable:
  * Define the class as above and create an instance: ''Runnable myRunnable = new MyRunnable''
  * Skip naming the class but still define it:
<code Java>
Runnable myRunnable =
    new Runnable(){
        public void run(){
            Log.v("Runnable running");
        }
    }
</code>
  * do "the lambda": ''Runnable myRunnable = () -> { Log.v("Lambda Runnable running"); };''

Once you have a runnable or really any function wrapped up all pretty like this you can create a new thread to run it:
<code Java>
Thread thread = new Thread(myRunnable);
thread.start();
</code>

//Borrowed and reworded from [[http://tutorials.jenkov.com/java-concurrency/creating-and-starting-threads.html|this excellent resource]].//