没有引用libs文件

引起以下错误原因是 在app 下build.gradle没有配置引用libs

Error:Execution failed for task ':app:compileDebugNdk'.

> Error: Your project contains C++ files but it is not using a supported native build system.

  Consider using CMake or ndk-build integration. For more information, go to:

   https://d.android.com/r/studio-ui/add-native-code.html

  Alternatively, you can use the experimental plugin:

   https://developer.android.com/r/tools/experimental-plugin.html

添加

sourceSets {

    main {

        jni.srcDirs = []

        jniLibs.srcDirs = ['libs']

    }

}