黑莓上的SplashScreen

Question

嗨,我想在我的Blackberry应用程序中添加一个SplashScreen,我从这里修改了代码并将其修改为:

package main;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.system.*;

import java.util.*;

public class SplashScreen extends MainScreen {
    private UiApplication application;
    private Timer timer = new Timer();
    private static final Bitmap _bitmap = Bitmap.getBitmapResource("SPlachS.png");
    public SplashScreen(UiApplication ui) {
        super(Field.USE_ALL_HEIGHT | Field.FIELD_LEFT);
        this.application = ui;
        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(new MyScreen());
    }
.....

我只是修改了构造函数,这就是全部(我也尝试过这里的代码),但我总是有一个未捕获的运行时异常

Answer 1

对于启动画面,只需在构造函数中使用它.

Thread th = new Thread() 
        {
            public void run() 
            {
                try 
                { 
                    Thread.sleep(2000); 
                } catch (Exception ex) 
                { 
                }
                UiApplication.getUiApplication().invokeLater ( new Runnable() 
                    { 
                        public void run () 
                        {
                            UiApplication.getUiApplication().pushScreen(newScreen);
                            close();
                        }
                    }
                );
            }
        };
        th.start();

在此线程之前将所有内容添加到屏幕上..我试过了.希望它能为你工作..