[BB 5.0] Impossible to return to the foreground

I know similar problems have been discussed several times already, but looks like I'm still too noob to solve my problem. A problem is the following.

I am trying to create a simple GUI application. It starts automatically, adds a special menu item in the system menu and goes to the background hidden from the list of applications. Once the user clicks on the item menu (mentioned above), the application must show the user, do something and go back to the background. I used this article as a guide.

My code is (BTW, how I format the code here?):

SerializableAttribute public class BackTest extends UiApplication {}

private static final long APP_ID = 0xda989447901484c8L;

Private boolean isHidden = true;

Public Shared Sub main (String [] args) {}
RuntimeStore store = RuntimeStore.getRuntimeStore ();

BackTest PAP = null;

If (args == null | args.length == 0) {}
PAP = (BackTest) store.get (APP_ID);
If (PAP! = null) {}
theApp.setHidden (false);
theApp.requestForeground ();
}
} else {}
final BackTest app = PAP = new BackTest();
Store.Replace (APP_ID, PAP);

theApp.createMenuItem ();
theApp.setHidden (true);
theApp.invokeLater (new Runnable() {}
public void run() {}
app.moveToBackgroundOnStart ();
}
});
theApp.enterEventDispatcher ();
}
}

public BackTest() {}
pushScreen (new BackTestScreen());
}

private void moveToBackgroundOnStart() {}
ApplicationManager man = ApplicationManager.getApplicationManager ();
KeepGoing Boolean = true;
{while (keepGoing)}
If (man.inStartup ()) {}
try {}
Thread.Sleep (500);
} catch (Exception ex) {}
} else {}
this.requestBackground ();
}
}
}

protected boolean acceptsForeground() {}
return! this.isHidden ();
}

protected boolean isHidden() {}
Return isHidden;
}

protected void setHidden (boolean isHidden) {}
this.isHidden = isHidden;
}

private void createMenuItem() {}
placement of int = 0 x 350111;
Element ApplicationMenuItem = new ApplicationMenuItem (investment) {}
public String toString() {}
return to 'Just Do It';
}

public Object execute (object context) {}
try {}
ApplicationManager.getApplicationManager (.launch ("BackTest"));
} catch (ApplicationManagerException e) {}
e.printStackTrace ();
}
Returns a null value.
}
};

The ApplicationMenuItemRepository repo = ApplicationMenuItemRepository.getInstance ();
repo.addMenuItem (ApplicationMenuItemRepository.MENUITEM_SYSTEM, item);
}
}

My problem is that when I click on the menu item "Just Do It", the application does not appear. I see in the debugger, that requestForeground is called, but nothing happens after that. I tried different things, like using GlobalEventListener instead of launching the app again (which resembles the app in the background does not receive events) or by calling requestForeground directly in the menu item Manager, but nothing happens.

What I am doing wrong?

PS the JRE BB version is 5.0.

Interestingly, the code seems fine for me. Sorry don't have time to test it myself ATM - maybe later.

There is one thing I would change:

theApp.invokeLater (new Runnable() {}
public void run() {}
app.moveToBackgroundOnStart ();
}
});

This in theory, runs your "pen" treatment, specifically sleep, on the thread of events. You need not actually the bottom of the request to wait because if your application is enough to throw things on the event thread, then it can deal with the merits of the request. Then you can just run the requestBackground

If you have other things you plan to wait at first, then in the executable you invokeLater, start a new Thread. Sounds a bit complicated, I know.

I don't think that this causes you a problem in this circumstance.

I would like that you try to move your code to the main() in the run method ApplicationMenu. There is no problem with this code getting your instance of the application and then by running requestForeground() on it.

If this does not help, you can do two things:

(1) create activate(), deactivate() methods in your Application, simply d put something out of System.out when these are run - call super too of course! See the Application section to determine what these do.

(2) put a breakpoint in acceptsForeground() and see when it is in the order of things, it is called. I have an idea it is actually called earlier than you expect.

Tags: BlackBerry Developers

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