我创建了一个Android项目,但是立即收到了错误信息。
Warning:(22, 12) Dependency on a support library, but the SDK installation does not have the "Extras > Android Support Repository" installed. Open the SDK manager and install it.
但我安装了它,它是在安装Android Studio时安装的。我创建了另一个项目,它再次发生了。