As described in the official link :
Each support library is backward compatible with a specific level of the Android API.
For instance,
support v4 : minSdk = 4v7 appcompat library : minSdk = 7v7 recyclerview library : minSdk = 7v7 CardView library : minSdk = 7
Today you can use cardview-v7-22.1.0.
This support library is a resource library. For customization in Eclipse you can follow the official guide .
Hovewer, I suggest you use Android Studio .
If you use Eclipse with ADT, keep in mind that Android Studio is now the official IDE for Android, so you need to upgrade to Android Studio to get all the latest IDE updates.
To configure in Android Studio, just add this line to your dependencies:
compile 'com.android.support:appcompat-v7:22.1.1' compile 'com.android.support:cardview-v7:22.1.1'
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