Motorola的J2ME界面扩展——LWT介绍

Motorola的J2ME界面扩展——LWT介绍

作者：陈跃峰

出自：http://blog.csdn.net/mailbomb

LWT(Lightweight Window Toolkit)是Motorola公司对MIDP的javax.microedition.lcdui界面包的一个扩展，可以在Motorola系列的手机中象使用MIDP界面一样来进行使用，解决了MIDP界面不能通过屏幕层次进行控制，以及无法实现个性化控件的问题(注：MIDP2.0通过使用game API控制屏幕层次，通过CustomItem来实现个性化的控件)。

LWT实现的目标：

l LWT包实现小于30KB

l 运行高效

l 易扩展

l MIDP兼容

l 单层次

LWT包中包含的类的继承结构图如下：

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使用LWT编程和一般的Java类类似，下面是一个简单的示例代码：

public class TestScreen extends ComponentScreen {

public DemoScreen() {

Command next = new Command("Next", Command.OK, 1);

Command prev = new Command("Previous", Command.BACK, 1);

addCommand(next);

addCommand(prev);

}

}