How to add Android X.X in Project -> Properties -> Java BuildPath

Question

I think the title is very clear. Sometimes I have some build errors, and in the Libraries tab of Java Build Path , I add/remove libraries, etc ... but when I delete the Android XX "folder", I can't bring it back. What I do is to delete the project from the Workspace and Import it again as Existing Android Project .

1. Is there a way to add it directly without deleting-importing a project?
2. How does eclipse generate it? for what purpose? Why if missing eclipse doesn't show errors before building?

Please help me understand all these!

Answer 1

Yes you can do that without removing the project and importing it back.

Right Click your Project-> Java Build Path->Add Library->Android Classpath Container->Choose your Project->Ok

You will your Android XX back.

Hope it helps.

Answer 2

当您删除项目时，单击删除磁盘上的项目内容的复选框，然后导入您的项目并添加库转到属性-> java 构建路径-> 排序和导出并检查您的库