当我单击创建 android 新项目时,此窗口打开。即使无法执行此操作,我也已重新启动。错误图像是。
当从帮助菜单中单击检查更新时,会出现此错误并弹出没有更新发现什么问题?
Your answer is in these three steps
1. goto window->Android SDK manager
2. Select Tools as in picture
3. then hit Install 2 packages at right bottom corner and let it be updated.
So you have to update Android SDK itself with new platform versions (the dialog you're not seeing) came out after the R20 SDK.
The easiest thing to do is go to the SDK page and download the newest version of the SDK. From there you'll be able to follow the guide you mentioned without problem.