supertank.java

j2me开发的Nokia手机游戏坦克大战

/*
 * @(#)SuperTank.java	0.20 02/11/07
 * Copyright (c) 2002 InterScape Creations. All Rights Reserved.
 */

import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class SuperTank extends MIDlet implements CommandListener {


    public static Display display;
    public static icTankCanvas canvas;		// The main screen
    private List opScreen = null;
    private Form helpScreen = null;

    private Command cancelCommand = new Command("CONTINUE", Command.SCREEN, 0);
 //   private Command selectCommand = new Command("SELECT", Command.SCREEN, 1);

    /*
     * Create the canvas
     */
    public SuperTank() {
		display = Display.getDisplay(this);
		canvas = new icTankCanvas(this,display);


/*		canvas.setCommandListener(this);
   		canvas.addCommand(exitCommand);
   		canvas.addCommand(skipCommand);
        canvas.addCommand(pauseCommand);
        canvas.addCommand(helpCommand);*/
       /* alert.addCommand(okCommand);
        alert.addCommand(cancelCommand);
        alert.setCommandListener(this);
        alert.append("您确实要退出吗？");*/
    }

    public void startApp() throws MIDletStateChangeException {
        //System.out.println("startApp():");
      //  Display.getDisplay(this).setCurrent(canvas);
      canvas.firstTime = true;
      canvas.start();
    }

    public void pauseApp() {
		canvas.pause();
    }

    public void destroyApp(boolean unconditional) throws MIDletStateChangeException {
		canvas.destroy();
    }

    void exitRequested()
    {
      try {
          destroyApp(false);
          notifyDestroyed();
      } catch (MIDletStateChangeException ex) {}
    }

    /*
     * Respond to a command issued on the Canvas.
     */
    public void commandAction(Command c, Displayable s) {

		if (c == opScreen.SELECT_COMMAND && s == opScreen) {
            switch(opScreen.getSelectedIndex()){
            	case 0:
            	    canvas.paused1 = false;
            	    display.setCurrent(canvas);
            	    opScreen = null;
            	    break;
            	case 1:
            	    canvas.paused1 = false;
            	    display.setCurrent(canvas);
            	    canvas.gameStatus = 2;
            	    canvas.gameSubStatus = 1;
            	    opScreen = null;
            	    break;
            	case 2:
            	    showHelp();
            	    opScreen = null;
            	    break;
            	case 3:
            	    try {
				        destroyApp(false);
				        notifyDestroyed();
				        opScreen = null;
		            } catch (MIDletStateChangeException ex) {}
		            break;
		        default:break;
            }
		}
		if (c == cancelCommand && s == helpScreen){
        	display.setCurrent(canvas);
            helpScreen.removeCommand(cancelCommand);
            canvas.paused1 = false;
            helpScreen = null;
        }
    }

    void showOption() {
    	opScreen = new List("游戏选项",List.IMPLICIT);
    	opScreen.append("返回",null);
    	opScreen.append("跳过",null);
    	opScreen.append("帮助",null);
    	opScreen.append("退出",null);
  ///  	opScreen.addCommand(selectCommand);
    	opScreen.setCommandListener(this);
		display.setCurrent(opScreen);
    }

    void showHelp(){
    	helpScreen = new Form("游戏帮助");
        helpScreen.append("上键（数字键2）控制坦克向上移动\n");
		helpScreen.append("下键（数字键8）控制坦克向下移动\n");
		helpScreen.append("左键（数字键4）控制坦克向左移\n");
		helpScreen.append("右键（数字键6）控制坦克向右动\n");
		helpScreen.append("发射键（数字键5）发射炮弹\n");
		helpScreen.addCommand(cancelCommand);
		helpScreen.setCommandListener(this);
		display.setCurrent(helpScreen);
    }
}