hackware1993/MagicIndicator

implementation project(':magicindicator')

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
}

<?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>

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);

ViewPagerHelper.bind(magicIndicator, mViewPager);

mFramentContainerHelper = new FragmentContainerHelper(magicIndicator);

// ...

mFragmentContainerHelper.handlePageSelected(pageIndex);   // invoke when switch Fragment

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) {
    }
}

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) {
    }
}

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.