gistfile1.txt

Annoying and difficult to work with

class AwesomeService
{
  public List<Model> getMyAwesomeModel()
  {
    ... Takes a long time
  }
}

More flexible to work with

class AwesomerService
{
  public interface Callback
  {
    void dataModelAvailable(List<Model> model);
  }
  
  public void getModel(Callback callback)
  {
    new Thread(new Runnable(){
      public void run()
      {
        ... Happens off of main thread
        
        new Handler(Looper.getMainLooper()).post(new Runnable(){
          public void run()
          {
          // Thanks to handler, will be run on main thread!
            callback.dataModelAvailable();
          }
        });
      }
    }).start();
  }
}