counteritemtest.java

J2ME手机游戏开发技术详解,适合初学者阅读使用

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

// A simple MIDlet to test the custom counter
// component.

public class CounterItemTest extends MIDlet
                 implements CommandListener {

    private Display display;

    public static final Command exitCommand =
                         new Command( "Exit",
                                      Command.EXIT, 1 ); 

    public CounterItemTest(){
    }

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

    protected void destroyApp( boolean unconditional )
                       throws MIDletStateChangeException {
        exitMIDlet();
    }

    public void exitMIDlet(){
        notifyDestroyed();
    }

    public Display getDisplay(){ return display; }

    protected void initMIDlet(){
        Form f = new Form( "用CounterItem实现定时器" );
        f.addCommand( exitCommand );
        f.setCommandListener( this );

        CounterItem counter = new CounterItem();
        counter.setLayout( Item.LAYOUT_CENTER |
                      Item.LAYOUT_NEWLINE_BEFORE |
                      Item.LAYOUT_NEWLINE_AFTER );

        f.append( counter );

        getDisplay().setCurrent( f );
    }

    protected void pauseApp(){
    }

    protected void startApp()
                      throws MIDletStateChangeException {
        if( display == null ){ 
            display = Display.getDisplay( this );
            initMIDlet();
        }
    }
}