Canvas类画布范围问题....

[liun_li]

做了一个滚动的小球程序,碰到障碍物会自动弹回,但是小球会滚动到下图的灰色部分,也就是说,这也属于画布的范围,有什么办法,能准确计算出灰色部分的高度.或者,让画面范围止于灰色部分..

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

import com.sun.perseus.parser.ColorParser;

public class bool extends MIDlet {
     Display dis;
     Can ca;
	public bool() {
		dis=Display.getDisplay(this);
		ca=new Can();
		ca.setTitle("会滚动的小球");
		dis.setCurrent(ca);
		new Thread(ca).start();
	}
	protected void startApp() throws MIDletStateChangeException {
         
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO 自动生成方法存根

	}

	protected void pauseApp() {
		// TODO 自动生成方法存根

	}

	class Can extends Canvas implements Runnable
	{
         int x=0,y=0;
         int Width=this.getWidth();
         int Heigth=this.getHeight();
         int dx=8,dy=8;
         final int r=7;
         Can()
         {
        	//setFullScreenMode(true);
         }
         void move()
         {
            x=x+dx;
            y=y+dy;
            if(x+r>=Width)
            {
            	x=Width-r;
            	dx=-dx;
            }
            if(x-r<0)
            {
            	x=0;
            	dx=-dx;
            }
        	if(y+r>=Heigth)
        	{
    
        		y=Heigth-r;
        		dy=-dy;
        	}
        	if(y-r<0)
        	{
        		y=0;
        		dy=-dy;
        	}
         }
         
		protected void paint(Graphics g) {
			g.setColor(250,250,250);
			g.fillRect(0, 0, Width, Heigth);
			move();
			g.setColor(100,255,20);
			g.fillRoundRect(x, y, r,r,90,90);
		}

		public void run() {
			while(true)
			{
				repaint();
				try {
					Thread.sleep(200);
				} catch (InterruptedException e) {
					// TODO 自动生成 catch 块
					e.printStackTrace();
				}
			}
		}
		
	}

}

[liun_li]

沒人知道嗎..我試過,把標題拿掉就行了,但是為什麼標題存在就不行了呢

[麦田捕手]

WTK模拟器屏幕高度问题，首先你要把Canvas设置为全屏模式，还有在wtk的安装目录中wtklib\devices\DefaultColorPhone打开DefaultColorPhone.properties把screen.height=320改为331