I just started an Android Studio project and on the center of the Design of the MainActivity the is written "android...CoordinatorLayout".

I just started an Android Studio project and on the center of the Design of the MainActivity the is written "android...CoordinatorLayout".

To use Coordination layout Add this dependency compile 'com.android.support:design:24.0.0' to gradle (module) (According to your android studio version and sdk. You can check any video to watch how to add dependcy) and then sync it
If you already did this then the problem is present in you xml code. Please put the text xml code in this post.