mainscreen_2.java

这是用j2me写的手机游戏流程控制的基本框架demo

package lckz;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

public class MainScreen_2 extends Canvas implements CommandListener
{
	private static Displayable instance;
	String[] str={"开始","设定","版权声明","离开"};
	int curMenu,y0=50;
	synchronized public static Displayable getInstance()
    {
    	if(instance==null)
    	{
    		instance=new MainScreen_2();
    	}
    	return instance;
    }
	public MainScreen_2()
	{
		setCommandListener(this);
	}
	protected void paint(Graphics g) {
		// TODO 自动生成方法存根
		g.setColor(0x000000);
		g.fillRect(0,0,getWidth(),getHeight());
		for (int i = 0; i < str.length; i++) {

			if (i == curMenu) {
				g.setColor(0xff00ff00);
				g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD
						| Font.STYLE_ITALIC, Font.SIZE_LARGE));
				g.drawString(str[i], getWidth() / 2, y0 + 30 * i,
						Graphics.HCENTER | Graphics.TOP);
			} else {
				g.setColor(0xff00ff00);
				g.setFont(Font.getDefaultFont());
				g.drawString(str[i], getWidth() / 2, y0 + 30 * i,
						Graphics.HCENTER | Graphics.TOP);
			}
		}
	}
	public void commandAction(Command c, Displayable d) {
		// TODO 自动生成方法存根
		 String cmd=str[0];
	     Navigator.flow(cmd);
	}
}