开发高可移植性J2ME的软件测试篇

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【IT168 技术文档】随着MTK的流行，使现在的J2ME虚拟机市场上品牌众多，除了索爱，Nokia S40，Moto，三星，LG等国际大品牌的虚拟机，更是有MTK，展讯内置的一些不知名的虚拟机，因此当初Write Once，Run AnyWhere变成了Write Once，Debug AnyWhere了。对于一个没有经验的J2ME程序员来说，开发一个兼容性高的软件变成了噩梦，不断的在不同手机，不同平台上打log，在这台手机上解决了这个问题，跑到另外一台机器上问题有重新了，噢，my god！我不干了。别急！我写这篇文章的目的就是要告诉大家，对于这中状况，我们也不是束手无策的。下面就等我慢慢的道来解决之道。

　　预期读者

　　本文主要适合那些有经验的J2ME程序员在优化软件，或者是需要考虑软件兼容性时的参考文档。

Jblend 平台

　　JBlend 是一家日本的嵌入式虚拟机厂家生产的J2ME虚拟机，此虚拟机大量的用于低端手机平台，本人发现有使用此虚拟机的平台有，MTK，MOTO。
官方网站：http://www.aplixcorp.com/chs/index.html 。

索尼爱立信平台

　　索爱的虚拟机平台是：Java Platform。最新版本是8。索爱的平台在性能上，程序的稳定性方面要优于其他虚拟机平台。而且APIs方面的bug也很少，在网络支持方面也很优秀。基本上不会因为你忘记关闭连接而导致连接泄漏。
官方网站：http://developer.sonyericsson.com/site/zhcn/docs_and_tools/p_docs_and_tools.jsp

S40平台

　　S40平台是Nokia针对S60智能操作系统推出适应低端手机的手机操作系统，相对其他虚拟机平台来说，S40虚拟机对J2ME的支持相对比较完善，而且稳定些，不过网络环境这块，S40对网络资源泄漏特别关注，具体不同的手机，对同时打开多个连接有限制，这里建议大家做个测试，就不再累赘了。
官方网站：http://www.forum.nokia.com/
S40平台详解：http://tech.sina.com.cn/mobile/n/2006-09-22/1053107637.shtml

S60 平台

　　Nokia 智能机平台下的J2ME虚拟机。相对S40来说，S60支持的特性比较多，而且有些比较特殊的用法，比如获取系统相关属性的时候就是其中之一。

什么是JCP？

　　JCP（Java Community Process) 是一个开放的国际组织，主要由Java开发者以及被授权者组成，职能是发展和更新Java技术规范、参考实现（RI）、技术兼容包（TCK）。Java技术和JCP两者的原创者都是SUN计算机公司。然而，JCP已经由SUN于1995年创造Java的非正式过程，演进到如今有数百名来自世界各地Java 代表成员一同监督Java发展的正式程序。　　JCP维护的规范包括J2ME、J2SE、J2EE，XML，OSS，JAIN等。组织成员可以提交JSR（Java Specification Requests），通过特定程序以后，进入到下一版本的规范里面。　　所有声称符合J2EE规范的J2EE类产品（应用服务器、应用软件、开发工具等），必须通过该组织提供的TCK兼容性测试（需要购买测试包），通过该测试后，需要缴纳J2EE商标使用费。两项完成，即是通过J2EE认证（Authorized Java Licensees of J2EE）。

什么是JSR？

　　JSR是Java Specification Requests的缩写，意思是Java 规范请求。是指向JCP(Java Community Process)提出新增一个标准化技术规范的正式请求。任何人都可以提交JSR，以向Java平台增添新的API和服务。JSR已成为Java界的一个重要标准。

下面是J2ME JSR规范列表

名称	内容
JSR118	MIDP2.1规范。定义了MIDP相关的接口，高级UI，低级UI，RMS，网络相关的APIs
JSR82	定义了蓝牙接口相关的APIs
JSR135	MobileMediaAPI，定义了多媒体相关开发的组件APIs
JSR172	1.一个轻量级的标准XML解析器 2.WebServices的远程调用API 　　其中这个JSR172实现的轻量级的XML解析器是JAXP1.2（JavaAPIforXMLProcessing）的一个子集。我们可以查看WTK提供的API看到j2me-xml提供的类一共只有12个，这说明这个轻量级的XML解析器是适合在移动电话这种资源受限设备上运行的。
JSR75	JSR75(PDAOptionalPackagesfortheJ2METMPlatform)中定义了两个可选包： PIM(ThePersonalInformationManagement)API，提供对个人信息数据的访问，一般包括名片夹，日历项，和待办事项。 FC(TheFileConnection)APIs，提供对本地文件系统的访问。
JSR177	安全APIs
JSR211	ContentHander内容处理APIs，可以调用此API打开相应的文件，比如你可以打开jar安装文件，打开mp3。
JSR239	OpenGL@ES。主要用于图形相关操作
JSR179	LocationAPIs主要是用于LBS服务
JSR180	SIPAPIs SIP是一个应用层的信令控制协议。用于创建、修改和释放一个或多个参与者的会话。这些会话可以好似Internet多媒体会议、IP电话或多媒体分发。会话的参与者可以通过组播（multicast）、网状单播（unicast）或两者的混合体进行通信。
JSR184	Mobile3DGraphicsAPIs，3D图形开发。
JSR229	手机支付APIs
JSR234	手机高级多媒体支持，可以支持更丰富的多媒体操作
JSR238	国际化支持APIs
JSR248	JSR248:MobileServiceArchitectureMSA移动服务架构。 MSAforCLDC规范定义了移动电话上的下一代Java平台，当然是基于CLDC的J2ME平台。 MSAforCLDC的目的是为了减少J2ME平台的API分裂，为开发者定义一个高操作性的应用程序和服务环境。 JTWI（JavaTechnologyforWirelessIndustry，JSR185）定义了一系列的规范来强制实现JTWI规范的设备必须实现某些JSR，例如MIDP2.0，WMA和MMAPI等。MSAforCLDC可以认为是JTWI的第2版，它规定了一个高度集中的J2ME平台运行环境。

检查JSR支持

　　检查JSR的支持简单的方式有两种：

1. 是通过System.getProperty("property_name")的方式进行判断，一般如果存在相关的APIs支持，它会返回一个非null字符串。

检测代码

System.getProperty(property_key);   public String getInfo(String info) {        if (info == null) {            return "<unknown>";        } else {            return info;        } }</!-- </div></div>2. 通过Class.forName(clase_name)的方式。<div style="padding-bottom: 4px; padding-left: 5.4pt; width: 98%; padding-right: 5.4pt; background: #e6e6e6; word-break: break-all; padding-top: 4px; border: windowtext 0.5pt solid;"><div>private boolean hasClassExit(String aClassName) {         try {             Class.forName(aClassName);             return true;         } catch (Exception e) {             return false;         } }</!-- </div></div>　　上面的检测代码相对比较简单，而且也容易理解，关键是那些JSR 支持的属性名称，或者APIs的写法。　　下面是部分属性名称，仅供参考。 <table style="border-collapse: collapse; mso-table-layout-alt: fixed;" border="0"><tbody><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; padding-top: 0pt; border: #000000 0.5pt solid;" width="226" valign="top">System property</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: #000000 0.5pt solid; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">Description</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: #000000 0.5pt solid; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">Value</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.platform</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">Defined in CLDC 1.0 and CLDC 1.1. </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.encoding</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">Always returns ISO-8859-1.</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.configuration</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">Defined in CLDC 1.0 and CLDC 1.1.</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.profiles</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.locale*</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 37</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.commports</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.hostname</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">localhost</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.profiles</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">MIDP2.0</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">file.separator</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">文件分割符</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现(/,/)</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.pim.version</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 75</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">1.0</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.smartcardslots</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 177</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.location.version</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 179</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">1.0</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.sip.version</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 180</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">1.0</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.m3g.version</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 184</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">1.0</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">microedition.jtwi.version</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 185</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">1.0</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">wireless.messaging.sms.smsc</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 205</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">wireless.messaging.mms.mmsc</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 205</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">依赖于底层实现</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">CHAPI-Version</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">JSR 211</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">JSR 211</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 426.1pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" colspan="3" width="568" valign="top">Nokia的一些系统参数</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.network.access</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: #000000 0.5pt solid; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"><a style="color: #000000;" title="网络" href="http://net.it168.com/" target="_blank">网络</a>参数</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: #000000 0.5pt solid; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">pd - GSMpd.EDGE -  EDGEpd.3G - 3Gpd.HSDPA - 3Gcsd -   GSM CSD/HSCSD bt_pan - Bluetooth PAN networkwlan - WIFIna -  无任何网络 </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.dateformat</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">日期格式</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">Yy/mm/dd</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.timeformat</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">时间格式</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">hh:mm</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.memoryramfree</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">动态<a style="color: #000000;" title="内存" href="http://product.it168.com/list/b/0205_1.shtml" target="_blank">内存</a>分配Note: S60 第3版不支持</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.batterylevel</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">电池状态</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.countrycode</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">城市代码</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.networkstatus</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">网络工作状态</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.networkavailability</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">网络是否激活状态</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.networkid</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">网络ID</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">返回2个值Network ID网络简称</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.networksignal</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"> </td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.cellid</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">Cellid</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">基站信息ID</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.imei</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top">Imei号</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top"><a style="color: #000000;" title="手机" href="http://product.it168.com/files/0302search.shtml" target="_blank">手机</a>唯一标识号</td></tr><tr><td style="border-bottom: #000000 0.5pt solid; border-left: #000000 0.5pt solid; padding-bottom: 0pt; padding-left: 5.4pt; width: 169.6pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="226" valign="top">com.nokia.mid.imsi</td><td style="border-bottom: #000000 0.5pt solid; border-left: medium none; padding-bottom: 0pt; padding-left: 5.4pt; width: 86.9pt; padding-right: 5.4pt; border-top: medium none; border-right: #000000 0.5pt solid; padding-top: 0pt;" width="115" valign="top"> </td></tr></tbody></table>  应用程序属性　　应用程序属性值是在应用程序描述符文件或者MANIFEST文件中定义的，当我们部署应用程序的时候可以定义应用程序属性。比如下面是一个典型的JAD文件内容。MIDlet-1: HttpWrapperMidlet,httpwrapper.HttpWrapperMIDletMIDlet-Jar-Size: 16315MIDlet-Jar-URL: HttpWrapper.jarMIDlet-Name: HttpWrapperMIDlet-Vendor: VendorMIDlet-Version: 1.0MicroEdition-Configuration: CLDC-1.0MicroEdition-Profile: MIDP-1.0Which-Locale: en　　其中Which-Locale就是应用程序属性值，我们可以通过MIDlet的成员方法getAppProperty()来得到它，代码片断如下：<div style="padding-bottom: 4px; padding-left: 5.4pt; width: 98%; padding-right: 5.4pt; background: #e6e6e6; word-break: break-all; padding-top: 4px; border: windowtext 0.5pt solid;"><div>import javax.microedition.midlet.*; public class MyMIDlet extends MIDlet { private String suiteName; private String which_locale; public MyMIDlet(){ suiteName = getAppProperty( "MIDlet-Name" ); which_locale = getAppProperty("Which-Locale"); } //这里省略了其他代码 }</!-- </div></div>　　属性值对大小写是敏感的，如果属性值在底层系统、JAD文件和Manifest文件中都没有定义的话，那么将返回Null。简单的Demo　　下面是简单的测试环境的代码，有经验的朋友可以很容易就就跑起来。代码片段  <div style="padding-bottom: 4px; padding-left: 5.4pt; width: 98%; padding-right: 5.4pt; background: #e6e6e6; word-break: break-all; padding-top: 4px; border: windowtext 0.5pt solid;"><div>  /**      * getSysInfo      */     private void getSysInfo() {         addInfo("Microedition Configuration: ",               getInfo(System.getProperty("microedition.configuration")));       addInfo("Microedition Profiles: ",               getInfo(System.getProperty("microedition.profiles")));       addInfo("microedition.jtwi.version:",               getInfo(System.getProperty("microedition.jtwi.version")));       addInfo("microedition.platform:",               getInfo(System.getProperty("microedition.platform")));       addInfo("microedition.locale:",               getInfo(System.getProperty("microedition.locale")));       addInfo("default encoding:",               getInfo(System.getProperty("microedition.encoding")));       addInfo("microedition.commports",             getInfo(System.getProperty("microedition.commports")));       addInfo("microedition.hostname",             getInfo(System.getProperty("microedition.hostname")));     //  microedition.smartcardslots               addInfo(" microedition.smartcardslots",             getInfo(System.getProperty(" microedition.smartcardslots")));       addInfo("com.nokia.network.access",                       getInfo(System.getProperty("com.nokia.network.access")));         addInfo("com.nokia.mid.dateformat",               getInfo(System.getProperty("com.nokia.mid.dateformat")));       addInfo("com.nokia.mid.timeformat",               getInfo(System.getProperty("com.nokia.mid.timeformat")));       addInfo("com.nokia.memoryramfree",               getInfo(System.getProperty("com.nokia.memoryramfree")));       addInfo("com.nokia.mid.batterylevel",               getInfo(System.getProperty("com.nokia.mid.batterylevel")));       addInfo("com.nokia.mid.countrycode",               getInfo(System.getProperty("com.nokia.mid.countrycode")));       addInfo("com.nokia.mid.networkstatus",               getInfo(System.getProperty("com.nokia.mid.networkstatus")));       addInfo("com.nokia.mid.networksignal",               getInfo(System.getProperty("com.nokia.mid.networksignal")));       addInfo("com.nokia.mid.networkid",               getInfo(System.getProperty("com.nokia.mid.networkid")));       addInfo("com.nokia.mid.networkavailability",               getInfo(System.getProperty("com.nokia.mid.networkavailability")));       addInfo("com.nokia.mid.cellid",               getInfo(System.getProperty("com.nokia.mid.cellid")));       addInfo("com.nokia.mid.imei",               getInfo(System.getProperty("com.nokia.mid.imei")));       addInfo("com.nokia.mid.imsi",               getInfo(System.getProperty("com.nokia.mid.imsi")));       String[] timeZoneIDs = java.util.TimeZone.getAvailableIDs();       StringBuffer timeZonesBuffer = new StringBuffer();       for (int i = 0; i < timeZoneIDs.length; i++) {           timeZonesBuffer.append(timeZoneIDs[i]).append('/n');       }       addInfo("Total memory:",               Long.toString(Runtime.getRuntime().totalMemory()) + " bytes");       addInfo("Free memory:",               Long.toString(Runtime.getRuntime().freeMemory()) + " bytes");       addInfo("Available TimeZones:", timeZonesBuffer.toString());       addInfo("Default TimeZone:", java.util.TimeZone.getDefault().getID());       addInfo("com.siemens.mp.lcdui.Image", hasClassExit("com.siemens.mp.lcdui.Image") + "");       addInfo("com.motorola.phonebook.PhoneBookRecord",        hasClassExit("com.motorola.phonebook.PhoneBookRecord") + "");       addInfo("com.motorola.Dialer", hasClassExit("com.motorola.Dialer") + "");       addInfo("com.jblend.util.Case", hasClassExit("com.jblend.util.Case") + "");       addInfo("com.samsung.util.AudioClip", hasClassExit("com.samsung.util.AudioClip") + "");       addInfo("com.mot.iden.multimedia.Lighting",     hasClassExit("com.mot.iden.multimedia.Lighting") + "");     }          private boolean hasClassExit(String aClassName) {         try {             Class.forName(aClassName);             return true;         } catch (Exception e) {             return false;         }     }    public String getInfo(String info) {        if (info == null) {            return "<unknown>";        } else {            return info;        }    }     public void addInfo(String name, String value) {         iForm.append(new StringItem(name, value)); }</!-- </div></div>代码片段2<div style="padding-bottom: 4px; padding-left: 5.4pt; width: 98%; padding-right: 5.4pt; background: #e6e6e6; word-break: break-all; padding-top: 4px; border: windowtext 0.5pt solid;"><div>public void collectInfos(TestClient midlet, Display display) {                 try {                         Class.forName("javax.microedition.media.control.VideoControl");                         addInfo("MMAPI: ", "yes" );             addInfo("MMAPI-Version: ",  getInfo(System.getProperty("microedition.media.version")) );                 } catch (ClassNotFoundException e) {                         addInfo("MMAPI: ", "no" );                 }                 try {                         Class.forName("javax.wireless.messaging.Message");                         addInfo("WMAPI 1.1: ", "yes" );                         try {                                 Class.forName("javax.wireless.messaging.MultipartMessage");                                 addInfo("WMAPI 2.0: ", "yes" );                         } catch (ClassNotFoundException e) {                                 addInfo("WMAPI 2.0: ", "no" );                         }                 } catch (ClassNotFoundException e) {                         addInfo("WMAPI 1.1: ", "no" );                 }                 try {                         Class.forName("javax.bluetooth.DiscoveryAgent");                         addInfo("Bluetooth-API: ", "yes" );                         try {                                 Class.forName("javax.obex.ClientSession");                                 addInfo("Bluetooth-Obex-API: ", "yes" );                         } catch (ClassNotFoundException e) {                                 addInfo("Bluetooth-Obex-API: ", "no" );                         }                 } catch (ClassNotFoundException e) {                         addInfo("Bluetooth-API: ", "no" );                 }                 try {                         Class.forName("javax.microedition.m3g.Graphics3D");                         addInfo("M3G-API: ", "yes" );                 } catch (ClassNotFoundException e) {                         addInfo("M3G-API: ", "no" );                 }                 try {                         Class.forName("javax.microedition.pim.PIM");                         addInfo("PIM-API: ", "yes" );                 } catch (ClassNotFoundException e) {                         addInfo("PIM-API: ", "no" );                 }                 try {                         Class.forName("javax.microedition.io.file.FileSystemRegistry");                         addInfo("FileConnection-API: ", "yes" );                 } catch (ClassNotFoundException e) {                         addInfo("FileConnection-API: ", "no" );                 }                 try {                         Class.forName("javax.microedition.location.Location");                         addInfo("Location-API: ", "yes" );                 } catch (java.lang.Throwable e) {                         addInfo("Location-API: ", "no" );                 }                 try {                         Class.forName("javax.microedition.xml.rpc.Operation");                         addInfo("WebServices-API: ", "yes" );                 } catch (ClassNotFoundException e) {                         addInfo("WebServices-API: ", "no" );                 }                 try {                         Class.forName("javax.microedition.sip.SipConnection");                         addInfo("SIP-API: ", "yes" );                 } catch (ClassNotFoundException e) {                         addInfo("SIP-API: ", "no" );                 }                 try {                         Class.forName("com.nokia.mid.ui.FullCanvas");                         addInfo("Nokia-UI-API: ", "yes" );                 } catch (ClassNotFoundException e) {                         addInfo("Nokia-UI-API: ", "no" );                 }                 try {                         Class.forName("com.siemens.mp.MIDlet");                         addInfo("Siemens-Extension-API: ", "yes" );                         try {                                 Class.forName("com.siemens.mp.color_game.GameCanvas");                                 addInfo("Siemens-ColorGame-API: ", "yes" );                         } catch (ClassNotFoundException e) {                                 addInfo("Siemens-ColorGame-API: ", "no" );                         }                 } catch (ClassNotFoundException e) {                         addInfo("Siemens-Extension-API: ", "no" );                 }         }</!-- </div></div>附表：属性表表1 MMAPI属性 <table style="border-collapse: collapse; mso-table-layout-alt: fixed;" border="0"><tbody><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt; border: #000000 1pt solid;" width="201" valign="top">属性名称</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">属性作用</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">supports.mixing</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表<a style="color: #000000;" title="手机" href="http://product.it168.com/files/0302search.shtml" target="_blank">手机</a>是否支持混音(同时播放多个Player)，返回值为“true”或“false”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">supports.audio.capture</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表<a style="color: #000000;" title="手机" href="http://mobile.it168.com/" target="_blank">手机</a>是否支持声音捕获(录音)，返回值为“true”或“false”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">supports.video.capture</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机是否支持<a style="color: #000000;" title="视频" href="http://movie.it168.com/" target="_blank">视频</a>捕获(录像)，返回值为“true”或“false”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">supports.recording</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机是否支持记录(record)，返回值为“true”或“false”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">audio.encodings</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机支持的声音格式，返回值格式为“encoding=audio/wav”，多个格式之间使用至少一个空格进行间隔</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">video.encodings</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机支持的视频格式，返回值格式为“encoding=video/3gpp”，多个格式之间使用至少一个空格进行间隔</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">video.snapshot.encodings</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机使用getSnapshot方法获得的视频快照格式，返回值格式为“encoding=png”，多个格式之间使用至少一个空格进行间隔</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">streamable.contents</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机支持的流媒体格式，返回null代表不支持</td></tr></tbody></table>  表2 Wireless Messaging API属性 <table style="border-collapse: collapse; mso-table-layout-alt: fixed;" border="0"><tbody><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt; border: #000000 1pt solid;" width="201" valign="top">属性名称</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">属性作用</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 150.95pt; padding-right: 5.4pt; padding-top: 0pt;" width="201" valign="top">wireless.messaging.sms.smsc</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 175.1pt; padding-right: 5.4pt; padding-top: 0pt;" width="233" valign="top">代表手机发送短信时的短信服务中心号码</td></tr></tbody></table>  表3FileConnection API <table style="border-collapse: collapse; mso-table-layout-alt: fixed;" border="0"><tbody><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt; border: #000000 1pt solid;" width="202" valign="top">属性名称</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">属性作用</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.photos</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中<a style="color: #000000;" title="存储" href="http://storage.it168.com/" target="_blank">存储</a>照片和其它图片的目录，例如“file:///c:/My files/ Images /”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.videos</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中存储视频的目录，例如“file:///c:/My files/Video clips/”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.tones</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中存储声音的目录，例如“file:///c:/My files/Tones/”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.memorycard</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中存储卡的根目录。例如“file:///d:/”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.private (Nokia S40不支持) </td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中MIDlet的私有工作目录，例如“file:///c:/System/MIDlets/[1015f294]/scratch”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.photos.name</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中图片目录的名称，例如“Images”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.videos.name</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中视频目录的名称，例如“Video clips”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.tones.name</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中声音目录的名称，例如“Sound clips”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">file.separator</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中的文件分隔符，例如“/”</td></tr><tr><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 151.55pt; padding-right: 5.4pt; padding-top: 0pt;" width="202" valign="top">fileconn.dir.memorycard.name</td><td style="padding-bottom: 0pt; padding-left: 5.4pt; width: 212.45pt; padding-right: 5.4pt; padding-top: 0pt;" width="283" valign="top">代表手机中存储卡的名称，例如“Memory card”</td></tr></tbody></table>--> </div> <div class="share_buttons" id="sharePanel"></div> <div class="article_next_prev"> <li class="prev_article"> 上一篇：<a href="http://blog.csdn.net/gumanren/article/details/6263597">J2ME自动升级 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