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根据给定文件的信息，我们可以提炼出以下相关的Java ME开发知识点： ### 1. Java ME (Micro Edition) 概述 - **定义与用途**：Java ME（Micro Edition）是一种为移动设备、嵌入式设备及消费电子产品设计的平台。它支持资源受限的设备，如手机和平板电脑等。 - **应用类型**：Java ME应用程序通常被称为MIDlets（Mobile Information Device Profile Application），主要在支持Java ME的设备上运行。 ### 2. 开发环境搭建 - **目标**：文档中提到如何设置调试环境，这通常包括开发工具的选择与配置。 - **步骤**： - 安装必要的软件，例如JDK（Java Development Kit）、IDE（如Eclipse、NetBeans）以及特定于Motorola设备的支持包。 - 配置环境变量，确保开发工具能够识别JDK的安装路径。 - 设置模拟器或实际设备用于调试。 ### 3. 支持APIs - **概述**：文档中提到提供了关于支持APIs的信息，这些APIs是专门为Motorola设备定制的，可能包含额外的功能或优化。 - **示例**：可能会包括多媒体处理、网络连接、位置服务等方面的API。 ### 4. 应用开发与打包 - **开发要点**：开发者需要了解如何创建、编译和测试MIDlets。 - **打包过程**：文档提到了有关如何打包应用程序以供安装的信息。这通常涉及将应用程序代码及其依赖项打包成一个JAR（Java Archive）文件，并提供一个JAD（Java Application Descriptor）文件来描述应用程序的元数据。 - **注意事项**：为了确保兼容性和性能，开发者还需要关注最佳实践，例如减少资源消耗、优化用户界面等。 ### 5. 调试与测试 - **调试工具**：文档提到了如何设置调试环境，这意味着开发者可以利用IDE中的调试功能来定位并修复代码中的错误。 - **测试策略**：除了调试之外，开发者还应该进行彻底的测试，以确保应用程序能够在不同的Motorola设备上稳定运行。 ### 6. 其他关键信息 - **版权信息**：文档强调了版权问题，明确指出文档只能用于开发针对Motorola产品的应用程序，并且指出了复制和分发的限制。 - **免责声明**：文档中还包括了Motorola对产品和服务的免责声明，强调不对任何直接或间接损害承担责任。 - **法律条款**：文档提到了不同司法管辖区对于间接或后果性损害的不同规定，以及Motorola的责任范围。 ### 总结 Java ME Developer Guide for MOTOMAGX是一份非常实用的指南，旨在帮助开发者针对Motorola设备开发Java ME应用程序。该指南不仅涵盖了开发环境的搭建、支持APIs的介绍，还详细说明了应用开发、打包以及调试的过程。此外，文档还特别强调了版权、法律责任等方面的规定，以确保开发者能够合法地使用这些信息。对于想要深入了解Java ME开发的人来说，这份指南是非常有价值的参考资料。

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Java ME Developer Guide for MOTOMAGX

1.0

Developer Guide

This documentation may be printed and copied solely for use in developing products for Motorola products. In addition, two (2)

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owners.

Java ME Developer Guide for MOTOMAGX

Version 1.0

March 2008

For the latest version of this document, visit http://developer.motorola.com.

Motorola, Inc.

http://www.motorola.com

Java ME Developer Guide for MOTOMAGX

Contents

Chapter 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Purpose and audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Developer tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

MOTODEV Studio for Java ME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

MOTODEV SDK for Java ME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Additional resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Technical articles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Developer knowledge base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Other developer documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

JSR specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Supported handsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 2 Downloading and Managing MIDlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Methods of downloading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Method 1–OTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Method 2–Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Method 3–IrDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Method 4–Direct cable and Motorola MIDway tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

The USER_AGENT string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Available memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Installing MIDlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Downloading a JAR file without a JAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Status report on installing and deleting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 3 Background Execution of MIDlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

MIDlet lifecycle in MIDP 2.0 specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

MIDlet background execution in MOTOMAGX phones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Entering background mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Paused state behavior OS differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

MIDlet development recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Pausing a MIDlet if background mode is not needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Utilizing background mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Audio resource handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Java ME Developer Guide for MOTOMAGX

Contents

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 4 MIDP Security Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

The MIDP 2.0 security environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

MIDP trust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Motorola’s general security policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

API access — consumer prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Operator branding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Identifying installed Java ME root certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Digital signing and MIDlet development lifecycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

On-device testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Production signing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Development certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Bound certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Obtaining a development certificate from Motorola . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Production signing (MIDlet signing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Choosing a signing authority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Production signing authority — summation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Motorola production code signing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Motorola security configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Chapter 5 Network APIs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Network connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

User permission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Indicating a connection to the user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

CommConnection API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

HTTPS connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

DNS IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Network access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Push registry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Mechanisms for push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Push registry declaration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Push message delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Deleting an application registered for push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Security for push registry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Java ME Developer Guide for MOTOMAGX

Contents

iii

Chapter 6 Platform Request API. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

MIDlet request of a URL that interacts with browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

MIDlet request of a URL that initiates a voice call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Chapter 7 RMS API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Chapter 8 Gaming API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Chapter 9 JSR-30 CLDC 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Chapter 10 JSR-75 PDA Optional Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

PIM API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

FileConnection API. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Chapter 11 JSR-82 - Bluetooth API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Chapter 12 JSR-118 MIDP 2.0 Application Testing and Signing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Chapter 13 JSR-120 - WMA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Wireless Messaging API (WMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

SMS client mode and server mode connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

SMS port numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

SMS storing and deleting received messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

SMS message types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

SMS message structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

SMS notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Chapter 14 JSR-135 - Mobile Media API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Network connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

ToneControl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

VolumeControl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

StopTimeControl. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

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