midlet2.java

来自「这是郭克华老师的J2ME视频的源代码」· Java 代码 · 共 46 行

package prj3_1;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class MIDlet2 extends MIDlet implements CommandListener{//Step1:事件响应类，实现CommandListener

	private Form frm = new Form("这是一个Form");
	private Display dis;
	private Command cmd1 = new Command("命令按钮",Command.SCREEN,1);
	
	public MIDlet2() {
		// TODO Auto-generated constructor stub
	}
	protected void startApp() throws MIDletStateChangeException {
		// TODO Auto-generated method stub
		dis = Display.getDisplay(this);
		dis.setCurrent(frm);
		
		frm.addCommand(cmd1);
		
		//Step3:绑定frm和this
		frm.setCommandListener(this);
	}	
	
	//Step2:必须重写commandAction函数,在里面写响应代码
	public void commandAction(Command c,Displayable d){
		System.out.println("按钮被选择,按钮标题为:"+c.getLabel());
	}
	
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub
		
	}
	protected void pauseApp() {
		// TODO Auto-generated method stub
	}
	
}