Underline Page Indicator

This indicator will underline each tab text, morphing its size while scrolling.

Underline-Page-Indicator

How to use

Add JitPack repository to your build.gradle file

allprojects {
	repositories {
	     ...
	     maven { url 'https://jitpack.io' }
	}
}
Gradle

Add the Dependency

dependencies {
    implementation "com.github.dcampogiani:underlinepageindicator:0.0.1"
}
Gradle

Add TabLayout and UnderlinePageIndicator to XML:

<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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabIndicatorHeight="0dp"
        app:tabMode="fixed" />

    <com.danielecampogiani.underlinepageindicator.UnderlinePageIndicator
        android:id="@+id/indicator"
        android:layout_width="match_parent"
        android:layout_height="2dp" />


    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>
XML

Style TabLayout with app:tabIndicatorHeight="0dp" and app:tabMode="fixed"

Setup with ViewPager

pager.adapter = Adapter(...)
indicator.setTabLayoutAndViewPager(tabs, pager)
Kotlin

Checkout the app project for an example.

GitHub