interactivegaugemidlet.java

来自「<j2me 开发精解> 詹建光著 里所有的源码。对J2me的开发相当」· Java 代码 · 共 38 行

package com.j2medev.sample.chapter3;

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

public class InteractiveGaugeMidlet extends MIDlet implements ItemCommandListener {
    
    private Gauge gauge = new Gauge("音量调节", true, 5, 0);
    private Form form = new Form("UIDemo");
    private Display display = null;
    private Command addCommand = new Command("增加",Command.OK,1);
    
    public void startApp() {
        if(display==null) {
            form.append(gauge);
            display = Display.getDisplay(this);
            gauge.addCommand(addCommand);
            gauge.setItemCommandListener(this);
        }
        display.setCurrent(form);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    public void commandAction(Command cmd,Item item){
        if(cmd == addCommand){
            if(item == gauge){
                gauge.setValue(gauge.getValue()+1);
            }
        }
    }
    
}