BlackBerry screensaver

Question

I am working on a BlackBerry application that requires a screen to start when the application starts. I did not find examples that implement a screensaver.

I used a timer in the start class of the application to display a pop-up image. Is there any other way to solve this problem?

Answer 1

To create a screen saver for the BlackBerry smartphone application, the MainScreen class must be expanded, key and navigation events must be used, and the timer can be used to fire the screen after a certain time.

public class SplashScreen extends MainScreen {
   private MainScreen next;
   private UiApplication application;
   private Timer timer = new Timer();
   private static final Bitmap _bitmap = Bitmap.getBitmapResource("image.png");
   public SplashScreen(UiApplication ui, MainScreen next) {
      super(Field.USE_ALL_HEIGHT | Field.FIELD_LEFT);
      this.application = ui;
      this.next = next;
      this.add(new BitmapField(_bitmap));
      SplashScreenListener listener = new SplashScreenListener(this);
      this.addKeyListener(listener);
      timer.schedule(new CountDown(), 5000);
      application.pushScreen(this);
   }
   public void dismiss() {
      timer.cancel();
      application.popScreen(this);
      application.pushScreen(next);
   }
   private class CountDown extends TimerTask {
      public void run() {
         DismissThread dThread = new DismissThread();
         application.invokeLater(dThread);
      }
   }
   private class DismissThread implements Runnable {
      public void run() {
         dismiss();
      }
   }
   protected boolean navigationClick(int status, int time) {
      dismiss();
      return true;
   }
   protected boolean navigationUnclick(int status, int time) {
      return false;
   }
   protected boolean navigationMovement(int dx, int dy, int status, int time) {
      return false;
   }
   public static class SplashScreenListener implements
      KeyListener {
      private SplashScreen screen;
      public boolean keyChar(char key, int status, int time) {
         //intercept the ESC and MENU key - exit the splash screen
         boolean retval = false;
         switch (key) {
            case Characters.CONTROL_MENU:
            case Characters.ESCAPE:
            screen.dismiss();
            retval = true;
            break;
         }
         return retval;
      }
      public boolean keyDown(int keycode, int time) {
         return false;
      }
      public boolean keyRepeat(int keycode, int time) {
         return false;
      }
      public boolean keyStatus(int keycode, int time) {
         return false;
      }
      public boolean keyUp(int keycode, int time) {
         return false;
      }
      public SplashScreenListener(SplashScreen splash) {
         screen = splash;
      }
   }
}