更新的SDK没有运行较低的SDK？-UpdatedSDKnotrunninglowerSDK?

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In your IDE, the error log shows you that you must install SDK Build tools 23.0.2 and sync your project. Simply click that link and the IDE should handle it for you.

在IDE中,错误日志显示您必须安装SDK Build工具23.0.2并同步项目。只需单击该链接,IDE即可为您处理。

Although you have build tools 25.2.4, 23.0.2 is required to build this project.

虽然您有构建工具25.2.4,但构建此项目需要23.0.2。

Also, the repository from which your project is from also states the prerequisites in the README:

此外,项目所在的存储库还说明了README中的先决条件:

Pre-requisites

Android SDK v23
Android Build Tools v23.0.2
Android Support Repository v23.3.0