ViewPagerIndicator

Paging indicator widgets that are compatible with the ViewPager from the AndroidX Library to improve discoverability of content.

For Material Design look at:

• PagerSlidingTabStrip
• PagerTabStrip from AndroidX
• PagerTitleStrip from AndroidX

Usage

For a working implementation of this project see the sample solution.

1. Include one of the widgets in your view. This should usually be placed adjacent to the ViewPager it represents.

   <dk.ostebaronen.droid.viewpagerindicator.TitlePageIndicator
      android:id="@+id/titles"
      android:layout_height="wrap_content"
      android:layout_width="match_parent" />

2. In your OnCreate method (or OnCreateView for a fragment), bind the indicator to the ViewPager.

   //Set the pager with an adapter
   var pager = FindViewById<ViewPager>(Resource.Id.pager);
   pager.Adapter = new TestAdapter(SupportFragmentManager);
   
   //Bind the title indicator to the adapter
   var titleIndicator = FindViewById<TitlePageIndicator>(Resource.Id.titles);
   titleIndicator.SetViewPager(pager);

3. (Optional) If you want to listen for a PageChange event, you should use it on the ViewPagerIndicator, rather than setting an OnPageChangeListener on the ViewPager, otherwise the ViewPagerIndicator will not update.

   //continued from above
   titleIndicator.PageChange += MyPageChangeEventHandler;

Theming

There are three ways to style the look of the indicators.

1. Theme XML. An attribute for each type of indicator is provided in which you can specify a custom style.
2. Layout XML. Through the use of a custom namespace you can include any desired styles.
3. Object methods. Both styles have Properties for each style attribute which can be changed at any point.

Each indicator has a demo which creates the same look using each of these methods.

Including In Your Project

ViewPagerIndicator is an Android Library project, which you can reference in your Android Project.

This project depends on the ViewPager class which is available in the Android Support Library.

Ported to Xamarin.Android By

• Tomasz Cielecki

Originally Developed By

• Jake Wharton - jakewharton@gmail.com

License

  Copyright 2013 Tomasz Cielecki
  Copyright 2012 Jake Wharton
  Copyright 2011 Patrik Åkerfeldt
  Copyright 2011 Francisco Figueiredo Jr.

  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.