Add a notification icon at the status bar in BlackBerry JDE 4.5.0

问题

I'm writing a Java application in BlackBerry JDE 4.5 that will start listening for some event at the start up. I want to display a small icon at the status bar.

I know its support in version 4.6.0 of the BlackBerry API set with ApplicationIcon, ApplicationIndicator and ApplicationIndicatorRegistry classes but which classes are there in BlackBerry JDE 4.5.0 API set?

Update

I think some support is there for 4.5.0 as I'm using Blackberry Pearl 8100 with OS v4.5.0.81 which displays Notification Icons at status bar for any incoming messages or calls.

I made the Alternale Entry point & Main CLDC app like this article below,

How To - Setup an alternate entry point for my application

I have got an article as,

How to - Make a running UI application go to the background and resume in the foreground

in which its said that

The alternate entry is going to call the main method with the parameter that is passed in, regardless of whether the application is running.

But in my case the main() is not getting called when I click on appIcon when the app is running in background.

It only updates appIcon & appName which is previously set in Alternate Entry Point.

So I m not getting where the control goes if its not calling main() when clicked on updatedIcon?

Is anyone has any idea on this issue?

---

I updated the appIcon & appName.

Now what I want is "When clicked on updatedIcon a particular screen should be opened & when the user goes back to Main Menu the app should get its original Icon, app name & the flow should go through main() when clicked on original app Icon"

I was thinking when I click on updated appIcon the control will go to main() but instead of calling main() it says,

Starting AppName
AppName already running

& directly it goes to first screen. and when I come back to Main Menu the app has updated icon & name

So how to get it?

回答1:

Unfortunately it's not possible. What you can do is update application icon.

Also there are alternative ways of notification:
Notification Service for Blackberry OS 4.5 application

Update Application Icon

alt text http://img211.imageshack.us/img211/4527/icoupdate1.jpgalt text http://img697.imageshack.us/img697/3981/icon.jpgalt text http://img687.imageshack.us/img687/256/iconactive.jpgalt text http://img130.imageshack.us/img130/3277/icoupdate2.jpgalt text http://img691.imageshack.us/img691/6459/icoupdate3.jpg
Background running application:

public class NotifIconSrvc extends Application {

 private int mCount = 0;
 private int mSize = 0;

 public NotifIconSrvc() {
  Timer timer = new Timer();
  timer.schedule(sendEventTask, 1000, 3000);
 }

 TimerTask sendEventTask = new TimerTask() {

  public void run() {
   // Post the GlobalEvent.
   // Long = ci.samples.45.notificon
   ApplicationManager.getApplicationManager().postGlobalEvent(
     0x5a9f7caa171ab7b8L, mCount++, mSize++);
  }
 };

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

Main application:

public class NotifIconApp extends UiApplication 
    implements GlobalEventListener {    
 private Bitmap mIcon = Bitmap.getBitmapResource("icon.png");
 private Bitmap mIconActive = 
        Bitmap.getBitmapResource("icon_active.png");
 private Scr mScreen = new Scr();

 public NotifIconApp() {
  addGlobalEventListener(this);
  pushScreen(mScreen);
 }

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

 public void eventOccurred(long guid, int count, int size, 
        Object object0, Object object1) {
  if (0x5a9f7caa171ab7b8L == guid) {
                    Bitmap icon = getUpdateIconBitmap(mIcon, count, size);
   HomeScreen.updateIcon(icon);
   Bitmap rolloverIcon = 
                        getUpdateIconBitmap(mIconActive, count, size);
   HomeScreen.setRolloverIcon(rolloverIcon);
   mScreen.updateScreen(count, size);
  }
 }

 private Bitmap getUpdateIconBitmap(Bitmap bmp, int count, int size) {
  int width = bmp.getWidth();
  int height = bmp.getHeight();
  Bitmap iconBmp = new Bitmap(width, height);
  Graphics g = new Graphics(iconBmp);
  XYRect rect = new XYRect(0, 0, width, height);
  g.drawBitmap(rect, bmp, 0, 0);

  g.setFont(g.getFont().derive(Font.BOLD, 20, Ui.UNITS_px,
    Font.ANTIALIAS_STANDARD, Font.COLORED_OUTLINE_EFFECT));

  String text = Integer.toString(count);
  g.setColor(Color.BLACK);
  g.drawText(text, 0, 2);

  text = Integer.toString(size) + " Kb";
  g.setColor(Color.GREEN);
  g.drawText(text, 0, height - 22);
  return iconBmp;
 }
}

class Scr extends MainScreen {
 LabelField mMessages;
 String mLabelText = "message count: ";
 String mTitleText = "message counter";

 public Scr() {
  add(mMessages = new LabelField(mLabelText));
  setTitle(mTitleText);
 }

 void updateScreen(int count, int size) {
  StringBuffer sb = new StringBuffer(Integer.toString(count));
  sb.append("/");
  sb.append(Integer.toString(size));
  sb.append("Kb");
  String text = sb.toString();
  setTitle(mTitleText + "(" + text + ")");
  mMessages.setText(mLabelText + text);
 }

 protected void makeMenu(Menu menu, int instance) {
  super.makeMenu(menu, instance);
  menu.add(mMenuGoBG);
 }

 MenuItem mMenuGoBG = new MenuItem("go background", 0, 0) {
  public void run() {
   UiApplication.getUiApplication().requestBackground();
  }
 };
}

来源：https://stackoverflow.com/questions/1699369/add-a-notification-icon-at-the-status-bar-in-blackberry-jde-4-5-0