tabs color changing

I was just wondering about tabs that change color when you are on the selected fragment For example: like facebook app tabs, when you are on home page the icon color changes to blue. Is this a tool or library used, or just i have to explicitly change all colors when fragment change ?

Solution

Try out bottom navigation view (https://developer.android.com/reference/android/support/design/widget/BottomNavigationView) by android and use a color selector like

background_color.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:color="@color/blue" />
    <item android:color="@color/grey" />
</selector>

and use this as

app:itemIconTint="@color/background_color.xml"

in your bottom navigation view.