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

Might be helpful for someone: in my case long time ago I had added keystore properties in build.gradle file for Android:

def keystorePropertiesFile = rootProject.file("keystore.properties")
def keystoreProperties = new Properties()
keystoreProperties.load(new FileInputStream(keystorePropertiesFile))

and after some period of time I pulled repo and forgot to add this file ("keystore.properties").

Gradle for some reason (!) gave me the same error (buildToolsVersion was defined a bit below in build.gradle file). The workaround was just to add missing "keystore.properties" file.