A powerful, customizable and extensible ViewPager indicator framework. As the best alternative of ViewPagerIndicator, TabLayout and PagerSlidingTabStrip.

Flutter_ConstraintLayout Another very good open source project of mine.

I have developed the world's fastest general purpose sorting algorithm, which is on average 3 times faster than Quicksort and up to 20 times faster, ChenSort

Usage

Simple steps, you can integrate MagicIndicator:

1. checkout out MagicIndicator, which contains source code and demo

2. import module magicindicator and add dependency:

   implementation project(':magicindicator')
   

   or

   repositories {
      ...
      maven {
          url "https://jitpack.io"
      }
   }
   
   dependencies {
      ...
      implementation 'com.github.hackware1993:MagicIndicator:1.6.0' // for support lib
      implementation 'com.github.hackware1993:MagicIndicator:1.7.0' // for androidx
   }
   

3. add MagicIndicator to your layout xml:

   <?xml version="1.0" encoding="utf-8"?>
   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical"
      tools:context="net.lucode.hackware.magicindicatordemo.MainActivity">
   
      <net.lucode.hackware.magicindicator.MagicIndicator
          android:id="@+id/magic_indicator"
          android:layout_width="match_parent"
          android:layout_height="40dp" />
   
      <android.support.v4.view.ViewPager
          android:id="@+id/view_pager"
          android:layout_width="match_parent"
          android:layout_height="0dp"
          android:layout_weight="1" />
   
   </LinearLayout>
   

4. find MagicIndicator through code, initialize it:

   MagicIndicator magicIndicator = (MagicIndicator) findViewById(R.id.magic_indicator);
   CommonNavigator commonNavigator = new CommonNavigator(this);
   commonNavigator.setAdapter(new CommonNavigatorAdapter() {
   
      @Override
      public int getCount() {
          return mTitleDataList == null ? 0 : mTitleDataList.size();
      }
   
      @Override
      public IPagerTitleView getTitleView(Context context, final int index) {
          ColorTransitionPagerTitleView colorTransitionPagerTitleView = new ColorTransitionPagerTitleView(context);
          colorTransitionPagerTitleView.setNormalColor(Color.GRAY);
          colorTransitionPagerTitleView.setSelectedColor(Color.BLACK);
          colorTransitionPagerTitleView.setText(mTitleDataList.get(index));
          colorTransitionPagerTitleView.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  mViewPager.setCurrentItem(index);
              }
          });
          return colorTransitionPagerTitleView;
      }
   
      @Override
      public IPagerIndicator getIndicator(Context context) {
          LinePagerIndicator indicator = new LinePagerIndicator(context);
          indicator.setMode(LinePagerIndicator.MODE_WRAP_CONTENT);
          return indicator;
      }
   });
   magicIndicator.setNavigator(commonNavigator);
   

5. work with ViewPager:

   ViewPagerHelper.bind(magicIndicator, mViewPager);
   

   or

   work with Fragment Container(switch Fragment by hide()、show()):

   mFramentContainerHelper = new FragmentContainerHelper(magicIndicator);
   
   // ...
   
   mFragmentContainerHelper.handlePageSelected(pageIndex);   // invoke when switch Fragment
   

Extend

MagicIndicator can be easily extended:

1. implement IPagerTitleView to customize tab:

   public class MyPagerTitleView extends View implements IPagerTitleView {
   
      public MyPagerTitleView(Context context) {
          super(context);
      }
   
      @Override
      public void onLeave(int index, int totalCount, float leavePercent, boolean leftToRight) {
      }
   
      @Override
      public void onEnter(int index, int totalCount, float enterPercent, boolean leftToRight) {
      }
   
      @Override
      public void onSelected(int index, int totalCount) {
      }
   
      @Override
      public void onDeselected(int index, int totalCount) {
      }
   }
   

2. implement IPagerIndicator to customize indicator:

   public class MyPagerIndicator extends View implements IPagerIndicator {
   
      public MyPagerIndicator(Context context) {
          super(context);
      }
   
      @Override
      public void onPageSelected(int position) {
      }
   
      @Override
      public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
      }
   
      @Override
      public void onPageScrollStateChanged(int state) {
      }
   
      @Override
      public void onPositionDataProvide(List<PositionData> dataList) {
      }
   }
   

3. use CommonPagerTitleView to load custom layout xml.

Now, enjoy yourself!

See extensions in app/src/main/java/net/lucode/hackware/magicindicatordemo/ext，more extensions adding...

Who developed?

hackware1993@gmail.com

cfb1993@163.com

Q&A

An intermittent perfectionist.

Visit My Blog for more articles about MagicIndicator.

订阅我的微信公众号以及时获取 MagicIndicator 的最新动态。后续也会分享一些高质量的、独特的、有思想的 Flutter 和 Android 技术文章。

License

  MIT License

  Copyright (c) 2016 hackware1993

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.

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