Error:Cause: buildToolsVersion is not specified

Question

I create a simple project and then I right-click on the project and then I use the make mudole app option. Now I have two build.gradle folders: 1-

Answer 1

Check if android studio version in build.gradle is same as the one you are running.

buildscript {

   repositories {
       google()
       jcenter()
   }
 dependencies {
    classpath 'com.android.tools.build:gradle:3.0.0'


    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
  }
}   

In my case, I opened/imported the project created on android studio 2.3.3 in android studio 3 and i was able to get rid of this issue after updating the build.gradle with 3.0.0