application-singleton

I wrote a little WPF app that when 'closed' minimizes to the system tray (customer requirement). Double clicking pops it back up, or right click gives a context menu to exit. But if the app is minimized, and the users navigate to Start->All Programs->The Application it starts a new instance. What (in C#) do I need to do to get the app to maximize the running instance if the user does this rather than fire up a new instance? Thanks! Conrad Frix This answer from Jon Skeet discusses using a mutex to do it Mutex is the way to go. It's a lot less fragile than using process names etc. However, you

I want to use the singleton UIApplication to access the managedObjectContext of the AppDelegate. But when I write [[[UIApplication sharedApplication] delegate] managedObjectContext] or [[[UIApplication sharedApplication] delegate] __managedObjectContext] it doesn't work. But this line works fine : NSLog(@"Seeking for the AppDelegate : %@", [[[UIApplication sharedApplication] delegate] class]); Do you have a solution ? Niels Try casting it to your actual app delegate implementation, like [(MyAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext]; And to add #import

What's the best way to save the data stored in the Application Class (singleton) of an Android Application? I have a quiet big app that shares a lot data between the activities. So most of it is stored on the Application Singleton. It all works great.. util the application is killed by the OS on low memory... then when it comes back it tries to resume the activity without success due to the lack of necessary data that was before on Application. Due to the lack of a much appreciated (and needed) method to save data on Application according to your experience what are the best approaches? Can i

Per the Android Documentation it states: There is normally no need to subclass Application. In most situation, static singletons can provide the same functionality in a more modular way. If your singleton needs a global context (for example to register broadcast receivers), the function to retrieve it can be given a Context which internally uses Context.getApplicationContext() when first constructing the singleton. How do I go about creating a static singleton that has global context so that it survives the running activity changing in my app? Is it enough to have a static context which