gaugedemo2.java

图书中的经典例子 好好看看 会有帮助的。java2me版本的

//gaugeDemo2.java file
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import itemex.*;

public class gaugeDemo2 extends MIDlet implements CommandListener 
{
    private Command exitCommand;
    private Form form;
    public gaugeDemo2()
    {
        exitCommand =new Command("Exit",Command.EXIT,1);
        form = new Form("gauge form 2");
        form.addCommand(exitCommand);
        //设置命令监听对象
        form.setCommandListener(this);
        
        form.append(new Gauge("INCREMENTAL_IDLE",false,Gauge.INDEFINITE, Gauge.INCREMENTAL_IDLE));
        form.append(new Gauge("CONTINUOUS_IDLE",false,Gauge.INDEFINITE, Gauge.CONTINUOUS_IDLE));
        form.append(new Gauge("RUNNING",false,Gauge.INDEFINITE, Gauge.CONTINUOUS_RUNNING));
        form.append(new AutoUpdateGauge("UPDATING",1000));
        //调整布局方式
        form.get(0).setLayout(Item.LAYOUT_SHRINK| Item.LAYOUT_2);
        form.get(1).setLayout(Item.LAYOUT_SHRINK| Item.LAYOUT_2|Item.LAYOUT_NEWLINE_AFTER);
        form.get(2).setLayout(Item.LAYOUT_SHRINK| Item.LAYOUT_2);
        form.get(3).setLayout(Item.LAYOUT_SHRINK| 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();
        }
    }
}