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Code Quality Rank: L4
Programming language: Java
License: Apache License 2.0
Tags: ViewPager Widget    

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README

NO LONGER MAINTAINED

LoopingViewPager

An android ViewPager extension allowing infinite scrolling.

You can use it with "standart" PagerAdapter (inflating the pager with Views),
but you can also use FragmentPagerAdapter which allows you to fill the pager with Fragments!

The ViewPager will actually create 2 additional Views/Fragments to fake the infinite loop.

This ViewPager is fully compatible with ViewPagerIndicator, and PagerSlidingTabStrip!

Usage

To use it simply change <android.support.v4.view.ViewPager> to <com.imbryk.viewPager.LoopViewPager>

If your PagerAdapter is used only to create Views (i.e. you don't use FragmentPagerAdapter or FragmentStatePagerAdapter), then no more code changes are needed!

If you want to use LoopViewPager with FragmentPagerAdapter or FragmentStatePagerAdapter additional changes in the adapter must be done.
The adapter must be prepared to create 2 extra items e.g.:

  • The original adapter creates 4 items: [0,1,2,3]
  • The modified adapter will have to create 6 items [0,1,2,3,4,5]
  • with mapping realPosition=(position-1)%count
  • [0->3, 1->0, 2->1, 3->2, 4->3, 5->0]

Sometimes "blinking" can be seen when paginating to first or last view (e.g. when you have a NetworkImageView in your layout). To remove this effect, simply call setBoundaryCaching( true ) on your LoopViewPager, or change DEFAULT_BOUNDARY_CASHING to true, if you want to set boundary caching on all LoopViewPager instances. This will prevent the first and last element from being destroyed, and every time they need to be displayed the existing instances will be used.

Sample

You can see a sample usage on ViewPagerIndicator fork (by Jake Wharton)
or on PagerSlidingTabStrip fork (by Andreas Stütz)

License

Copyright 2013 Leszek Mzyk

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.


*Note that all licence references and agreements mentioned in the LoopingViewPager README section above are relevant to that project's source code only.