Why do we need a class to be enhanced component to use Background and UiThread #2257

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1. dodgex commented on Jan 25, 2020

   

   dodgex

   on Jan 25, 2020

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   There are like two kinds of annotations:

   • Those who tell AA that it should enhance a class (EActivity, EBean, EView, etc)
   • Those who tell AA HOW it should enhance stuff (Background, UiThread, injections, etc)

   every non-enhancing annotation needs to be in an enhanced class as only enhanced classes get a class that the code for the other features can be generated to.

   BUT: There is a way for you to indirectly use the background/uithread features in non enhanced classes. Just make an enhanced class that uses the annotation how you would like to have it in your other class, build the project and open the generated class (eg if you enhance MyFancyBean you need to open MyFanceBean_ (note the _)) there you find the code we generate and can copy it to your non enhanced class.

   The code uses BackgroundExecutor and UiThreadExecutor to do the actual work so you can directly use this classes instead of the annotations.
2. chpasha commented on Jan 25, 2020

   

   chpasha

   on Jan 25, 2020

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   thank you for the answer. I've looked into the code and figured out the same myself. Unfortunately the solution with coping the code from generated classes won't suite - of course I know what code is generated and how to use it directly but the whole point is getting rid of boilerplate, not creating it. I've ended up creating an own enhanced component which is not bound to context and doesn't have to have a parameter-less constructor or constructor with context parameter. Of course it's usefulness is limited, but Background, UI, AfterInject and anything else that doesn't require context can be used now allowing custom constructors at the same time. So now one can create a bean like this

   @EBeanLite
   class MyViewModel extends ViewModel {
       MyViewModel(SavedStateHandle handle) {}
   
     @Background
      doSomeStuff() {}
   }
   
3. WonderCsabo

   added

   Enhancement

   on Mar 30, 2020