Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ.

Question

I am new to Android App Development. When I tried to create a new project,Android Project...the following message popped up..

Error:Execution failed for task \':app:

Answer 1

I have the same problem, in build.gradle (Module:app) add the following line of code inside dependencies:

dependencies 
{
   ...
   compile 'com.android.support:support-annotations:27.1.1'
}

It worked for me perfectly