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!
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.:
[0,1,2,3]
[0,1,2,3,4,5]
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.
You can see a sample usage on ViewPagerIndicator fork (by Jake Wharton)
or on PagerSlidingTabStrip fork (by Andreas Stütz)
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.