navigator.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.Display;
import javax.microedition.midlet.MIDlet;

public class Navigator
{
  final public static int MAIN_SCREEN=1;
  final public static int GAME_SCREEN=2;
  final public static int SET_SCREEN=3;
  final public static int GAME_HELP_SCREEN=4;
  final public static int SET_HELP_SCREEN=5;
  public static MIDlet midlet;
  public static Display display;
  public static int current;
  public static void show(Object obj)
  {
	  switch(current)
	  {
	  case MAIN_SCREEN:
		  display.setCurrent(MainScreen.getInstance());
		  break;
	  case GAME_SCREEN:
		  display.setCurrent(GameScreen.getInstance());
		  break;
	  case SET_SCREEN:
		  display.setCurrent(SetScreen.getInstance());
		  break;
	  case GAME_HELP_SCREEN:
		  display.setCurrent(new HelpScreen((String)obj));
		  break;
	  case SET_HELP_SCREEN: 
		  display.setCurrent(new HelpScreen((String)obj));
		  break;
	  }
  }
  public static void flow(String cmd)
  {
	  switch(current)
	  {
	  case MAIN_SCREEN:
		  if(cmd.equals("开始"))
		  {
			  current=GAME_SCREEN;
			  show(null);
		  }else if(cmd.equals("版权声明"))
		  {
			  display.setCurrent(CopyScreen.getInstance());
		  }else if(cmd.equals("设定"))
		  {
			  current=SET_SCREEN;
			  show(null);
		  }else if(cmd.equals("离开"))
		  {
			  midlet.notifyDestroyed();
		  }
		  break;
	  case GAME_SCREEN:
		  if(cmd.equals("辅助说明"))
		  {
			  current=GAME_HELP_SCREEN;
			  show("游戏的操作方式");
		  }else if(cmd.equals("返回"))
		  {
			  current=MAIN_SCREEN;
			  show(null);
		  }
		  break;
	  case SET_SCREEN:
		  if(cmd.equals("辅助说明"))
		  {
			  current=SET_HELP_SCREEN;
			  show("设定方式");
		  }else if(cmd.equals("返回"))
		  {
			  current=MAIN_SCREEN;
			  show(null);
		  }
		  break;
	  case GAME_HELP_SCREEN:
		  if(cmd.equals("返回"))
		  {
			  current=GAME_SCREEN;
			  show(null);
		  }
		  break;
	  case SET_HELP_SCREEN:
		  if(cmd.equals("返回"))
		  {
			  current=SET_SCREEN;
			  show(null);
		  }
		  break;
	  }
  }
}