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//实现按任意键进入主界面
import javax.microedition.lcdui.*;
 
public class WelcomeCanvas extends Canvas {
    //背景图片
    Image bgImage = null;
    Display display;
    public WelcomeCanvas(Display display) {
        this.display = display;
        //导入图片
        try {
            bgImage = Image.createImage("/res/welcome.png");
        } catch (Exception e) {
            Alert a = new Alert("错误", "资源文件不存在！", null, AlertType.ERROR);
            a.setTimeout(Alert.FOREVER);
            //显示提示框
            display.setCurrent(a);
        }
    }
 
    protected void paint(Graphics g) {
        //绘制背景图片
        g.drawImage(bgImage, 0, 0, Graphics.TOP | Graphics.LEFT);
    }
 
    protected void keyPressed(int keyCode) {
        //显示需要显示的界面
        display.setCurrent(new MainList());
    }
}
 
 
//实现等待5秒以后自动进入主界面
import javax.microedition.lcdui.*;
 
public class WelcomeCanvas extends Canvas implements Runnable {
    //背景图片
    Image bgImage = null;
    Display display;
    public WelcomeCanvas(Display display) {
        this.display = display;
        //导入图片
        try {
            bgImage = Image.createImage("/res/welcome.png");
        } catch (Exception e) {
            Alert a = new Alert("错误", "资源文件不存在！", null, AlertType.ERROR);
            a.setTimeout(Alert.FOREVER);
            //显示提示框
            display.setCurrent(a);
        }
        //启动线程
        Thread thread = new Thread(this);
        thread.start();
    }
 
    protected void paint(Graphics g) {
        //绘制背景图片
        g.drawImage(bgImage, 0, 0, Graphics.TOP | Graphics.LEFT);
    }
 
    public void run() {
        //等待3秒
        try {
            Thread.sleep(5000);
        } catch (Exception e) {
        }
        //显示需要显示的界面
        display.setCurrent(new MainList());
    }
}

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