Google finally released an official version:

MaterialButtonToggleGroup

I recommend using this instead unless a deficiency is found.

ToggleButtons

This library adds two custom widgets that adhere to the Material Design definition for toggle buttons. Library is backwards compatible to API 9.

You can add the library with:

compile 'com.anthonymandra:ToggleButtons:3.0.1'

Recent Changes

Version 3.0

Migrate to androidx. Required a bump to minSdk 14.

1. Package name changed to androidx.appcompat.widget. ToggleButton|ToggleGroup

Version 2.0

Adds backwards compatibility to API 9. This changed the api for dividers slightly.

1. Divider is now in the custom namespace: app:divider
2. Divider can no longer support tint. You'll need to create custom drawbles.

Basics

You can use <code>ToggleGroup</code> much like you would a <code>RadioGroup</code> and fill it with <code>ToggleButton</code>, or anything extending <code>CompoundButton</code>. See the Sample for examples.

When no text is present they will use a custom draw that allows proper image alignment. When text is present they will behave like a traditional <code>CompoundButton</code>, or the old android <code>ToggleButton</code>.

You can toggle exclusive selection or multi selection on a group and you can also allow unselecting (no selection at all). Buttons support tint.

Sample

Official Material Guidelines