View dialog box on powerUp()

Hello

I am building an app that does not have a graphical user interface and runs in the background. The application uses PhoneListener to interrupt a call and create a new one in its place. Since I have no GUI I cannot send the keystrokes required to phone until after a dialog box is displayed (either a dialog box, asking permissions of the Application, or by changing the OptionsProvider). What I want to do, it's just pop up a dialog on startup so I can then inject my shots to end the call.

Here is my code:

public class GVIntercepter extends UiApplication implements SystemListener
{
    public static void main(String[] args)
    {
        // register an options provider
        GVIntercepterOptionsProvider provider = new GVIntercepterOptionsProvider();
        OptionsManager.registerOptionsProvider(provider);

        // register a phone handler
        PhoneHandler phone_handler = new PhoneHandler();
        Phone.addPhoneListener(phone_handler);

        GVIntercepter instance = new GVIntercepter();
        // instance.enterEventDispatcher();

        if( ApplicationManager.getApplicationManager().inStartup() ) {
          // Add a system listener to detect when system is ready and available.
          instance.addSystemListener(instance);
        } else {
          // System is already ready and available so perform your start up work now.
          // Note that this work must be completed using invokeLater because the
          // application has not yet entered the event dispatcher.
          instance.doStartupWorkLater();
        }
        // Enter the event dispatcher.
        instance.enterEventDispatcher();
    }

    //Invoked when the user is putting the device into a power off state.
    public void powerOff()
    { }

    //Invoked when the device has left the power off state.
    public void powerUp()
    {
      Application.getApplication().removeSystemListener(this);
      doStartupWork();
    }

    //Invoked when the internal battery voltage falls below a critical level.
    public void batteryLow()
    { }

    //Invoked when the internal battery voltage has returned to normal.
    public void batteryGood()
    { }

    //Invoked when the internal battery state has changed.
    public void batteryStatusChange(int status)
    { }

    private void doStartupWork()
    {
      // Perform your start up activities here!
      Application.getApplication().invokeLater( new Runnable() {
        public void run() {
          Dialog.ask(Dialog.D_YES_NO, "Display?");
        }
      } );
    }

    private void doStartupWorkLater()
    {
      Application.getApplication().invokeLater( new Runnable() {
        public void run() {
          doStartupWork();
        }
      } );
    }

    public GVIntercepter()
    {    }
}

I tried almost everything to get the dialog box to display and I am at a loss here. Any ideas?

Also, I'd be open to suggestions on power sending keystrokes to a background application in the phone app and use PhoneArguments to call without displaying any prompt at all.

I never thought seriously about doing something like what you're trying to do, so I'm sorry this isn't a complete answer to your questions. You may use these details to get a little further though.

You say that your app is a bottom up, however you have extended UiApplication. If your application is treated as it displays a screen of the user, but you never insert a screen, if your application never gets thrust in the foreground. You will find that, once you started with your current code, your icon is available in the Task Switcher (ALT + ESC) and if you swap to your application, your dialog box is there to be seen (on a white background, as any UiApplication). Try it and see.

You can replace your code in doStartupWork() with something like the following, so that you can see actually started. Try this and then see what happens when you select your application by using the Task Switcher after you answer your dialog box (note I use UiApplication rather than on request, simply because the code you call later should a UiApplication to run. Your code works really because you have found your own application, which is currently spreading UiApplication. If you change it to extend the Application instead, then you will get a UiApplication.

      UiApplication.getUiApplication().invokeLater( new Runnable() {
        public void run() {
            UiApplication.getUiApplication().requestForeground();
            Dialog.ask(Dialog.D_YES_NO, "Display?");
            UiApplication.getUiApplication().requestBackground();
        }
      } );

I suspect that you really want to be a background application. In this case, you extend Application rather than UiApplication. Then, to bring something to the attention of the user, you can use UIEngine, as shown here:

How - to alert a user to a background application
Article number: DB-00407

http://www.BlackBerry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800505/800608/...

Alternatively, you can do what you do, stick your phone earpiece in place, then the UiApplication, the output is not in the Task Switcher. Even if you have left your UiApplication, your hook is still in place and can still do something.

I have a point more than related.

You are actually setting up an earpiece of phone. When this listener is controlled, it will run the app phone, not your Application. This application has a GUI, then maybe you need not to use this dialog box "to access a graphical interface.

Sorry, as stated, I never really looked seriously to do something like what you do, then I do not understand everything and maybe you have this covered. Bit I hope this helps.

Tags: BlackBerry Developers

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