Error While creating new project with android studio 3.0.1

Question

Error:Execution failed for task \':app:preDebugAndroidTestBuild\'.

Conflict with dependency \'com.android.support:support-annotations\' in project \':app\

Answer 1

Based on the documentation:

Both your app APK and its test APK share the same classpath. So, you can get a build error if both APKs depend on different versions of the same library.

So the fix would be to change your

com.android.support:appcompat-v7:26.1.0

to

com.android.support:appcompat-v7:27.1.1