java - Android平台的R.id是如何生成的？

Question

我可以假设 R.id 文件将出现在每个 android 项目中吗？

或者这是否特定于某些开发环境？

Answer 1

它由编译器自动生成；您可以放心地假设它会一直存在。

检查 the documentation :

A project's R.java file is an index into all the resources defined in the file.

You use this class in your source code as a sort of short-hand way to refer to resources you've included in your project.

This is particularly powerful with the code-completion features of IDEs like Eclipse because it lets you quickly and interactively locate the specific reference you're looking for.