飞信Symbian客户端接口规范.docVIP

Chapter 19: Mobile Applications 　　Objectives 　　? Define a mobile application. 　　? Understand components found in a mobile application. 　　? Learn the key scenarios where mobile applications would be used. 　　? Learn the design considerations for mobile applications. 　　? Identify specific scenarios for mobile applications, such as deployment, power usage, and synchronization. 　　? Learn the key patterns and technology considerations for designing mobile applications. 　　目标 　　定义个移动应。 　　理解建立个移动应素。 　　学习移动应重户场景。 　　学习移动应设计考虑因素。 　　鉴别特定移动应场景，如部署，电量同步等。 　　学习移动应关键模型技术因素。 　　Overview 　　A mobile application will normally be structured as a multi-layered application consisting of user experience, business, and data layers. When developing a mobile application, you may choose to develop a thin Web-based client or a rich client. If you are building a rich client, the business and data services layers are likely to be located on the device itself. If you are building a thin client, the business and data layers will be located on the server. Figure 1 illustrates common rich client mobile application architecture with components grouped by areas of concern. 　　概述 　　通常，移动应由个层应结构，包括户体验、业务数据等。移动应时，以选择做个基于网络瘦客户端或个富客户端。如果选择富客户端，那么业务数据服务层般位于设备本身。如果选择瘦客户端，那么业务数据层则位于服务器端。图1，根据组成素关系，描述个富客户端移动应架构。 　　图1：常富客户端应架构 　　Design Considerations 　　The following design guidelines provide information about different aspects you should consider when designing a mobile application. Follow these guidelines to ensure that your application meets your requirements and performs efficiently in scenarios common to mobile applications: 　　设计考虑 　　当设计个移动应时，面设计方针提供应该考虑不同方面信息。遵循这些指能够确保应能够满足需求，同时，于般移动应能够有效。 　　? Decide if you will build a rich client, a thin Web client, or rich Internet application (RIA). If your application requires local processing and must work in an occasionally connected scenario, consider designing a rich client. Keep in mind that a rich client application will consume more device resources and will be mor