gaugedemo.java

J2ME MIDP 2.0 无线设备编程的一些源码

//gaugeDemo.java file
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class gaugeDemo extends MIDlet implements CommandListener 
{
    private Command exitCommand;
    private Form form;
    public gaugeDemo()
    {
        exitCommand =new Command("Exit",Command.EXIT,1);
        form = new Form("gauge form");
        form.addCommand(exitCommand);
        //设置命令监听对象
        form.setCommandListener(this);
        
        form.append(new Gauge("Interactive",true,10 ,0 ));
        form.append(new Gauge("nonInteractive",false,100 ,0));
        ((Gauge)form.get(1)).setValue(30);
        //如果为MIDP v2.0 则可以调整布局方式
        form.get(0).setLayout(Item.LAYOUT_EXPAND| Item.LAYOUT_2|Item.LAYOUT_NEWLINE_AFTER);
        form.get(1).setLayout(Item.LAYOUT_EXPAND| Item.LAYOUT_2|Item.LAYOUT_NEWLINE_AFTER);
    }
    protected void startApp(  ) throws MIDletStateChangeException
    {
        Display.getDisplay(this).setCurrent(form);
    }

    protected void pauseApp(  )
    {
    }

    protected void destroyApp( boolean p1 )
    {
    }

    public void commandAction(Command c,Displayable d)
    {
        if (c ==exitCommand)
        {
            destroyApp(false);
            notifyDestroyed();
        }
    }
}