Unable to import android.support.design.widget.NavigationView

before importing support library, Make sure you have downloaded Android Support Repository using SDK Manager.

I am also facing the same problem and i found a solution by adding the following code to build.gradle

compile 'com.android.support:design:22.2.0'

I also adjusted my targetSdk in the build.gradle file to 22 and i was able to succesfully import the NavigationView without any problem.