blackberry - BlackBerryアプリの進行状況画面を表示する

Question

BlackBerryアプリケーションがリモートサーバーからデータをフェッチしているときに進行状況画面を表示するにはどうすればよいですか？

ボタンのないアニメーションGIFのない進行状況画面が必要です。（OKまたはキャンセル）

Answer 1

    public class ProgressDialog extends PopupScreen
    {
        public ProgressDialog(String waitString)
        {
            super(new VerticalFieldManager());
            add(new LabelField(waitString,Field.FIELD_HCENTER));//add a string which u want to show for progressing
        }
    }

ProgressDialog progress = new ProgressDialog("Please Wait...");
//Add screen to UI
UiApplication.getUiApplication().pushScreen(progress);


//Remove screen from UI
progress.close();

Answer 2

ProgressBar progressBar = new ProgressBar("Waiting for location update....",50,1000);

progressBar.start(); // Start progress bar
progressBar.remove(); //remove progress bar

プログレスバー スレッド

public class ProgressBar extends Thread {

    Thread thd;
    private int maximum, timeout;

    private boolean useful = true;

    private PopupScreen popup;

    private int iterations = 0;

    /**
     * Object constructor
     * 
     * @param title
     *           Text to display on popup area
     * @param maximum
     *           Range / width of the gauge field of progress bar
     * @param timeout
     *           Milliseconds to pause between updates to progress bar
     * @see GaugeField
     * @see Thread
     * @see PopupScreen
     */

    public ProgressBar(String title, int maximum, int timeout) {
        this.maximum = maximum;
        this.timeout = timeout;


        VerticalFieldManager manager = new VerticalFieldManager();

        popup = new PopupScreen(manager);


        manager.add(new LabelField(title));

    }

    /**
     * run() method for starting thread
     */

    public void run() {

        UiApplication.getUiApplication().invokeLater(new Runnable() {
            public void run() {
                UiApplication.getUiApplication().pushScreen(popup);
            }
        });

        int iterations = 0;     

        while (useful) {
            System.out.println("I m  here in while runn  "+ useful);
            try {
                Thread.sleep(timeout);
            } catch (Exception e) {

            }

            if (++iterations > maximum)
            {
                iterations = 1;
                useful = false;
                UiApplication.getUiApplication().invokeLater( new Runnable()
                {
                    public void run ()
                    {
                        _locationProvider.reset();
                        Dialog.alert("Location not found.");

                    }
                } );

            }

            //          gaugeField.setValue(iterations);            
        }

        if (popup.isDisplayed()) {
            UiApplication.getUiApplication().invokeLater(new Runnable() {
                public void run() {
                    UiApplication.getUiApplication().popScreen(popup);
                }
            });
        }
    }

    /**
     * Method to shutdown the thread and remove the popup screen
     *  
     */

    public synchronized void remove() {
        useful = false;
    }

}