Error: Your project contains C++ files but it is not using a supported native build system [closed]

Answer 1

Put this part in build.gradle(Module:app) above buildTypes{}

sourceSets {
   main {
     jni.srcDirs = []
   }
}

buildTypes{
   //...
}

Answer 2

Add this line to your gradle.properties file

android.useDeprecatedNdk=true