刚从j2sd转来j2me,小问题请教各位,望不吝赐教。谢谢
做了个小程序测试手机按键,奇怪为什么update的清屏功能并没有执行,显示的信息逐个重叠。
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
public class keytest extends Canvas {
/**
* Constructor for keytest
*/
String aMessage = "[请按键]";
protected keytest() {
super();
}
/**
* @see Canvas#paint(Graphics)
*/
protected void paint(Graphics g) {
g.drawString(aMessage,10,50,Graphics.TOP|Graphics.LEFT);
}
protected void keyPressed(int keyCode) {
aMessage = getKeyName(keyCode);
aMessage = "数字"+aMessage+"已被按下";
repaint();
}
}