Question

I’m going through some memory issues with my Android development.

I was wondering if my actual model would work, and also would like some input on how to do this in a better way:

• I need public static final globals
• I need public global variables that never gets garbage collected
• I need to have an Engine running and never destroy without me calling stop()

MainApplication : Application
  public static final Boolean DEBUG = false;
  onCreate()
    Engine.getEngine().prepare()

  MainActivity : Activity
    onResume()
      Engine.getEngine().start()
    onPause()
      Engine.getEngine().stop()

Engine
  prepare()
    MainApplication.DEBUG = true;
  start()
    LocationManager.requestLocationUpdates()
  stop()
    LocationManager.removeUpdates()

Engine is a Singleton class, receiving location updates and such.

It is imperative that my Engine class does not get released not the DEBUG variable.

Answer 1

• For your “Type 1” constants use a dedicated public class containing public static final T NAME = Val; – declarations.

• For the Engine, I’d recommend using a Service.

• For your “Type 2” vars, the Service could offer getters or you could make use of SQLite.

I see there’s some “Location”-Stuff going on there … the developer website has some good “best practices” on using the Location Services. Maybe there you’ll get some more inspiration.