itemcommandlistenerdemo.java

来自「J2ME手机游戏开发技术详解随书光盘」· Java 代码 · 共 71 行

import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class ItemCommandListenerDemo extends MIDlet 
{
    private final static Command CMD_STOP = new Command("暂停", 
                                                        Command.ITEM, 1);
    private final static Command CMD_RESTART = new Command("重新开始", 
                                                        Command.ITEM, 2);
    private final static Command CMD_EXIT = new Command("退出", 
                                                        Command.ITEM, 3);
    private Display display;
    private NonInteractiveGaugeRunnable nonInteractive;
    private Form mainForm;
    private Thread mThread;
    
    public ItemCommandListenerDemo() {
        display = Display.getDisplay(this);
        mainForm = new Form("Gauge演示");
        
        
        nonInteractive = new NonInteractiveGaugeRunnable(
                                 "非交互模式", 10, 0);
        mThread = new Thread(nonInteractive);
        mThread.start();
        mainForm.append(nonInteractive);
        nonInteractive.addCommand(CMD_STOP);
        nonInteractive.addCommand(CMD_RESTART);
        nonInteractive.addCommand(CMD_EXIT);

        ItemCommandListener listener = new ItemCommandListener(){
        public void commandAction(Command command, Item item) {
        if(item == nonInteractive){
        if(command == CMD_STOP)nonInteractive.stop();
        if(command == CMD_RESTART)nonInteractive.reStart();
        if(command == CMD_EXIT){
                destroyApp(false);
                notifyDestroyed();
        }
        }
        }
        };
        nonInteractive.setItemCommandListener(listener);
    }

    /**
     * Signals the MIDlet to start and enter the Active state.
     */
    protected void startApp() {
        
        display.setCurrent(mainForm);
    }

    /**
     * Signals the MIDlet to terminate and enter the Destroyed state.
     */
    protected void destroyApp(boolean unconditional) {
        nonInteractive.setDone();


    }

    /**
     * Signals the MIDlet to stop and enter the Paused state.
     */
    protected void pauseApp() {
    }


}