title: How to use RecyclerView and CardView
body: <p>I don't have much experience in android development and try to implement RecyclerView in my application. The version of android studio does not have Android L neither there is option to install. Everytime it says <code>android.support.widget.v7.RecyclerView</code> in not used and disabled it from import packages. I give refrences in layout file also in Gradle.build but my problem is still there anyone help please?</p>