左右循环滚动的ViewPager

Infinite View Pager =============== Augment Android's ViewPager with wrap-around functionality. Original StackOverflow question: http://stackoverflow.com/questions/7546224/viewpager-as-a-circular-queue-wrapping ## Problem With a normal ViewPager, you can only scroll from the first page to second page (and so forth), from left-to-right. Once you reach the last page, your only option is to scroll backwards, right-to-left. In other words, 'wrap-around scrolling' (going from first-to-last, and last-to-first) is not possible. ## Solution Use the `InfiniteViewPager` in your Activity/Fragment layout: ... <com.antonyt.infiniteviewpager.InfiniteViewPager android:id="@+id/pager" android:layout_width="fill_parent" android:layout_height="fill_parent" /> ... Wrap your existing `PagerAdapter` with the `InfinitePagerAdapter`: ... PagerAdapter wrappedAdapter = new InfinitePagerAdapter(adapter); viewPager.setAdapter(wrappedAdapter); ... Wrapped scrolling should now be possible with your `ViewPager`. The pages you see are not duplicates - each page from your `PagerAdapter` is only created once and then reused. This means you do not have to worry about managing multiple instances of the same `Fragment`. ## Caveats It is only possible to achieve wrapping when you have at least 4 pages. This is because of the way the `ViewPager` creates, destroys, and displays the pages. No fix for the general case has been found.