I want to add some third-party libraries, but I always got the "Failed to resolve" error. I tried some suggestions I found here, like: Error:(23, 17) Failed to resolve: junit:junit:4.12 , Gradle failed to resolve library in Android Studio and Gradle in Android Studio: Failed to resolve third-party libraries but it didn't work! how can I solve the problem? thanks in advance

I want to add some third-party libraries, but I always got the "Failed to resolve" error. I tried some suggestions I found here, like: Error:(23, 17) Failed to resolve: junit:junit:4.12 , Gradle failed to resolve library in Android Studio and Gradle in Android Studio: Failed to resolve third-party libraries but it didn't work! how can I solve the problem? thanks in advance

I want to add some third-party libraries, but I always got the "Failed to resolve" error. I tried some suggestions I found here, like: Error:(23, 17) Failed to resolve: junit:junit:4.12 , Gradle failed to resolve library in Android Studio and Gradle in Android Studio: Failed to resolve third-party libraries but it didn't work! how can I solve the problem? thanks in advance

I want to add some third-party libraries, but I always got the "Failed to resolve" error. I tried some suggestions I found here, like: Error:(23, 17) Failed to resolve: junit:junit:4.12 , Gradle failed to resolve library in Android Studio and Gradle in Android Studio: Failed to resolve third-party libraries but it didn't work! how can I solve the problem? thanks in advance