Abstract: A design method named Java-In-A-Box (JIAB) was proposed to make the Android suitable for developing large scale programs. By re-encapsulating the inner components of Android platform, the responsibility boundaries among user interface, business logic and data storage were clear. Based on JIAB, the common fundamental module for an embedded Point of Sale (POS) was designed and implemented. It has been found that the JIAB method is suitable for developing large scale applications on Android platform.

Key words: software design, common fundamental module, Point of Sale (POS), embedded systerm, Operating System (OS)

摘要： 提出JIAB设计思想使Android适应于大规模应用程序的开发。JIAB通过对Android平台内置应用程序组件进行重新封装，使其在界面显示、业务逻辑、数据存储的权责更清晰。利用JIAB思想设计并实现了零售终端系统的公共基础模块。实践证明，JIAB思想适合在Android平台上进行大规模应用程序的开发。

关键词: 软件设计, 公共基础模块, 销售点终端, 嵌入式系统, 操作系统