Failed to resolve: com.android.support:appcompat-v7:27.+ (Dependency Error) [duplicate]
This question already has an answer here: Failed to resolve: com.android.support:cardview-v7:26.0.0 android 23 answers I am having this issue in Android studio. Error:Failed to resolve: com.android.support:appcompat-v7:27.+ <a href="install.m2.repo">Install Repository and sync project</a><br><a href="open.dependency.in.project.structure">Show in Project Structure dialog</a> My Android Studio is full of error android studio cannot identify libraries. The whole screen looks like this. This is my Gradle code: apply plugin: 'com.android.application' android { compileSdkVersion 27 buildToolsVersion