i am trying to use viewpager from android support library v4 in intelli j currently i have android sdk 4.1 I copied android-support-v4.jar to my intellij android project under 'libs' in the project settings of intellij I webt to "Modules" = "MyModuleName" = dependencies tab, and add the android-support-v4.jar, by navigating the path to the libs/ folder under my own project I checked the 'export' besides this newly added jar file but i still can't use viewpager in my application i get a crash msg like java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxxx/com.xxxx.MyActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class android.support.v4.view.ViewPager