对于Midlet状态,有一个叫application management software的会专门负责管理。你所有要关心的,就是怎样和这个AM打交道。
pauseApp()
destroyApp()
startApp()
重写这三个方法。AM将会在相应的时间调用。
而
notifyDestroyed()
notifyPaused()
resumeRequest()
则是让你有机会去通知AM需要做什么。
下面是一个简单的例子,可以根据自己扩充测试一下。有一点比较奇怪的就是,理论上说,在Midlet处于Active状态的时候,如果有电话进入,AM会调用pauseApp()。但是实际测试时,没有发现AM调用这个方法。
package net.csdn.blog.vincint;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/**
* This is a simple test to help me understanding the Midlet state
*
*
Title: Midlet Test
*
Description:
*
Copyright: Copyright (c) 2005
*
Company: http://blog.111com.net/Vincint
* @author Vincint
* @version 1.0
*/
public class MidletState
extends MIDlet
implements
CommandListener {
protected Form form;
protected Command exitCmd;
protected Command debugCmd;
protected Display display;
protected String debug;
public MidletState() {
addDebugInfo("In MidletState()");
display = Display.getDisplay(this);
form = new Form("Hello world.");
form.append("What a new world!");
exitCmd = new Command("Exit", Command.EXIT, 1);
debugCmd = new Command("Debug", Command.SCREEN, 2);
form.addCommand(exitCmd);
form.addCommand(debugCmd);
form.setCommandListener(this);
}
/**
* startApp
*/
protected void startApp() {
addDebugInfo("In startApp()");
display.setCurrent(form);
}
/**
* pauseApp
*/
protected void pauseApp() {
addDebugInfo("In pauseApp()");