我在Android Studio 4.0.1上得到这个错误。这是我的解决方案:去你的构建。gradle(Module: app)文件，然后更新compileSdkVersion和buildToolsVersion。

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.2"
}

这对我很管用。

文件->设置-> Android SDK -> Android SDK位置编辑-> Android SDK

构建开放。gradle文件。只需添加一个空格或按enter键。然后同步项目。它的工作原理……

对于那些遇到此问题的人，我建议您进行一次干净安装(删除以前安装的任何现有设置和文件)。不要浪费时间解决问题。我正在搜索android studio 3.6.3的答案，没有结果。

Source Compatibility should be selected as the minimum Android Version that your app should be compatible with(usually selected as SDK 15), Target Compatibility should be selected as the newest Android Version that your app should be compatible with(SDK 23). Afterwards you want to check your AndroidMenifest and your gradle.build to see if its realy set to the properties selected if not you can just add it manually. and ofcourse you should check the SDK Location is actually pointing to your android studio SDK folder (if you are importing from Eclipse then you should point to your Eclipse SDK folder).

从Android 3.2.0开始，菜单结构和选项略有变化。我通过更改下面菜单中的模块SDK来修复这个错误:

>项目结构>模块>应用文件>依赖选项卡>模块SDK

确保点击Apply保存更改。