Gradle: DSL method not found: minSdkVersion / targetSdkVersion / compileSdkVersion / buildToolsVersion

Question

As it took me some time to find the solution for this error, I post my problem and solution here in the hope that I find it next time faster:

Error:(39, 0) Gradle DSL method not found: 'minSdkVersion()'

What I tried to do:

• I followed the Android Test Blueprint's sample to define the library versions in the top level / rootProject'S build.gradle file:

  ext { minSdkVersion 16 }

• And wanted to use it in the app's/module's build.gradle file:

  minSdkVersion rootProject.ext.minSdkVersion

Answer 1

After half an hour or so I notices that this was a simple typo -.-

Solution

Add the "=" sign when you define a variable, else, Gradle thinks you call an Android method which it does not yet know in the top level build file:

ext { minSdkVersion = 16 }