計(jì)算機(jī)相關(guān)專業(yè)畢業(yè)設(shè)計(jì)外文翻譯--移動(dòng)設(shè)備的應(yīng)用平臺(tái)—j2me簡(jiǎn)介-資料下載頁(yè)
2025-05-11 17:11本頁(yè)面
【導(dǎo)讀】根據(jù)Sun的定義：J2ME是一種高度優(yōu)化的Java運(yùn)行環(huán)境，主要針對(duì)消費(fèi)類。電子設(shè)備的，例如蜂窩電話和可視電話、數(shù)字機(jī)頂盒、汽車導(dǎo)航系統(tǒng)等等。開發(fā)系統(tǒng)是沒有意義的事」這個(gè)基本原則。于是J2ME先將所有的嵌入式裝置。充足的嵌入式裝置。Configuration規(guī)格之中；而另外一種裝置則規(guī)范為ConnectedDevice. Configuration的概念區(qū)隔成兩種抽象的型態(tài)。該如何開發(fā)以及它們應(yīng)該具有哪些功能。面該如何呈現(xiàn)就是定義在Profile里頭。根據(jù)底層Configuration內(nèi)所定義的核心類別函式庫(kù)所建立?？焖俑淖兊牟椒?。不要被從版本以來(lái)的小改變所誤導(dǎo)。立即模式API使應(yīng)用程序能夠直接創(chuàng)建和操縱3D元素。應(yīng)用程序可以采用最適合的API，或保留模式與立即模式的組合?；サ难菔?，特點(diǎn)是顯示一只跳躍的袋鼠。CBS）或工具包版本中的新協(xié)議－多媒體通信服務(wù)。您可以標(biāo)記MMS消息，并向消息添加任何文件集合。視器能夠顯示模擬器發(fā)送或接收的MMS消息。備，以及最大數(shù)據(jù)包大小等參數(shù)。這一工具包的設(shè)計(jì)目的是為了幫助開發(fā)人員簡(jiǎn)化j2me的開發(fā)過(guò)程。
【正文】 example I would jar file via bluetooth to phone, install later. But if you want to through installed manually signed documents, will pass through jad to install, and ensure that jad and jar file is in the same directory. My way is through the data will be two files into mobile phone memory or covering the card, then through jad to install, this installation, good software is software that has signed. Won39。t have always annoying asking users are allowed to operate the tooltip. But I39。ve seen mobile opinion, should be different mobile phones have different performance. Such as SONY Ericsson mobile phone about clew is still require the user to set themselves up. Nokia also. Only nokia in using the signature software users cannot set to always allow or only hint again. And signed can be set up. 2. Programming staff need to pay attention to, like many functions in the unsigned is before can use, such as GPS, work connection, and file for reading and writing. 3. Signed software what benefits. Signature is told us this software is credible, user the directest feeling is working or visit the mobile phone files, transceiver SMS, MMS, bluetooth etc, but after signed these functions are available. Part This is jad MIDlet Permissions attribute in the problem. When unsigned attributes to this request is not strictly, but after signed must note. Must put to use to access to join in, otherwise this function cannot be used. Below are some monly used MIDlet Permissions attributes. Local Files and Personal Information： The J2ME Wireless Toolkit supports JSR 75, the PDA Optional Packages for the J2ME Platform, which also includes two independent APIs: The FileConnection API gives MIDlets access to a local file system on the device. The Personal Information Management (PIM) optional package includes APIs for manipulating contact lists, calendars, and todo lists. A real device may have a local file system which can be accessed using the FileConnection API. In the J2ME Wireless Toolkit emulator, a simulated file system is maintained as a directory on your hard disk. The files your application can access using FileConnection are stored in subdirectories of toolkit\appdb\skin\filesystem, where toolkit is the installation directory of the J2ME Wireless Toolkit and skin is the name of the emulator skin. For example, the DefaultColorPhone emulator skin es with a root directory installed called root1, which contains a file called Readme. The file39。s full path is toolkit\appdb\DefaultColorPhone\filesystem\root1\Readme. You can manage the root directories that are available by choosing MIDlet External events from the emulator window39。s menu. You39。ll see a small utility window for adding and removing roots. These actions will also generate events for a registered listener object. In a real device, personal information might be stored in a proprietary format in memory. The emulator uses a directory on your hard disk to contaiin this information, accessible using the PIM API. All information is stored in toolkit\appdb\pim. Lists are stored in subdirectories of the contacts, events, and todo directories. For example, a contact list called Contacts is contained in toolkit\ appdb\ pim\ contacts\ Contacts. Inside the list directory, items are stored in standard formats specified by the Inter Mail Consortium. Contacts are stored in vCard format, while calendar and todo items are both stored in vCalendar format. Summary The J2ME Wireless Toolkit is much more than an incremental update of an excellent includes support for four exciting new specifications that together define six new APIs. As the world of wireless Java technology rapidly evolves, the J2ME Wireless Toolkit keeps pace and contains all the tools you need for.
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