Application with the background thread

IDE: Blackberry JDE Version 4.5.0.7

Simulator: About us - Smartphone BlackBerry 2.9.0.52 Simulator

Model: BlackBerry Curve 8310 smartphone

Hi all

I have an application that, after installation on the BlackBerry must be selected in the application menu only once and will run continuously until it is uninstalled from the device. Code looks like this: -.

public final class app_name extends Application {   private BackGroundThread _thread;

   public static void main(String[] args) {        app_name app = new app_name();        app.enterEventDispatcher();    }

    public app_name() {        _thread = new BackGroundThread();         _thread.start();    }

    private class BackGroundThread extends Thread {

         public BackGroundThread() {            /***initialize parameters in constructor*****/        } 

         public void run() {             while(true) {             /*****do stuff using parameters*****/             sleep(10000);           }         }     }}

This code works well. Now, I have to add a user interface that allows the user to change some of the parameters that are used in the thread.

(1) as a first step, I have to change application to UiApplication to allow pushScreen to use. Since it's a subclass, I would have no problem with this law?

(2) to get the UI goes, my plan was to declare another class (extends screen) within app_name. What is the right way to go?

(3) parameters must be manipulated such that there is no risk of conflict of data didn't pack the thread class and the class screen try to access settings at the same time. So using the semaphore will be a good strategy?

(4) any other questions I may be brought to face or is it better to do this quite differently? I wonder if the instance of the thread class will actually be run side-by-side in the user interface and if the user interface to stop smoking will actually affect the Backgorund thread anyway. It might be better to create a completely separate application for the bit of UI that can access this application settings, but I don't know how to do this.

My apologies for the long post. Any help will be greatly appreciated.

Hello

PersistentObject is synchronized, so that it will not conflict data. You can search for "BlackBerry_Application_Developer_Guide_Volume_2" which has the details of the store persistent in the section "persistent data storage.

Thank you.

Tags: BlackBerry Developers

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