title: How to add extended library "android.supportv4.app" to your application?
body: <p>I was searching around <a href="http://developer.android.com/resources/samples/Support4Demos/src/com/example/android/supportv4/app/FragmentTabsPager.html" rel="nofollow">http://developer.android.com/resources/samples/Support4Demos/src/com/example/android/supportv4/app/FragmentTabsPager.html</a>
  But I couldn't find where is the source for FragmentActivity. I wonder how could I download this package so that I can add them to my application? Has anyone done it before could share me some information? Thanks in advance.</p>