Material Toggle Button with Icon only

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.google.android.material.button.MaterialButtonToggleGroup
        android:id="@+id/toggleButtonGroup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:singleSelection="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <Button
            android:id="@+id/btnLeft"
            style="@style/ToggleButtonWithIconOnly"
            app:icon="@drawable/ic_baseline_format_align_left_24"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            tools:layout_editor_absoluteX="168dp"
            tools:layout_editor_absoluteY="153dp" />

        <Button
            android:id="@+id/btnCenter"
            style="@style/ToggleButtonWithIconOnly"
            app:icon="@drawable/ic_baseline_format_align_center_24"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            tools:layout_editor_absoluteX="173dp"
            tools:layout_editor_absoluteY="251dp" />

        <Button
            android:id="@+id/btnRight"
            style="@style/ToggleButtonWithIconOnly"
            app:icon="@drawable/ic_baseline_format_align_right_24"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            tools:layout_editor_absoluteX="166dp"
            tools:layout_editor_absoluteY="340dp" />

        <Button
            android:id="@+id/btnJustified"
            style="@style/ToggleButtonWithIconOnly"
            app:icon="@drawable/ic_baseline_format_align_justify_24"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            tools:layout_editor_absoluteX="166dp"
            tools:layout_editor_absoluteY="447dp" />

    </com.google.android.material.button.MaterialButtonToggleGroup>

</androidx.constraintlayout.widget.ConstraintLayout>

ic_baseline_format_align_center_24.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M7,15v2h10v-2L7,15zM3,21h18v-2L3,19v2zM3,13h18v-2L3,11v2zM7,7v2h10L17,7L7,7zM3,3v2h18L21,3L3,3z"/>
</vector>

ic_baseline_format_align_justify_24.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M3,21h18v-2L3,19v2zM3,17h18v-2L3,15v2zM3,13h18v-2L3,11v2zM3,9h18L21,7L3,7v2zM3,3v2h18L21,3L3,3z"/>
</vector>

ic_baseline_format_align_left_24.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M15,15L3,15v2h12v-2zM15,7L3,7v2h12L15,7zM3,13h18v-2L3,11v2zM3,21h18v-2L3,19v2zM3,3v2h18L21,3L3,3z"/>
</vector>

ic_baseline_format_align_right_24.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M3,21h18v-2L3,19v2zM9,17h12v-2L9,15v2zM3,13h18v-2L3,11v2zM9,9h12L21,7L9,7v2zM3,3v2h18L21,3L3,3z"/>
</vector>

MainActivity.kt

package com.sriyank.mdccomponents

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        toggleButtonGroup.addOnButtonCheckedListener { toggleButtonGroup, checkedId, isChecked ->
            if (isChecked) {
                when (checkedId) {
                    R.id.btnLeft -> showToast("Left Align")
                    R.id.btnCenter -> showToast("Center Align")
                    R.id.btnRight -> showToast("Right Align")
                    R.id.btnJustified -> showToast("Justified Align")
                }
            } else {
                if (toggleButtonGroup.checkedButtonId == View.NO_ID) {
                    showToast("No Alignment Selected")
                }
            }
        }
    }

    private fun showToast(str: String) {
        Toast.makeText(this, str, Toast.LENGTH_SHORT).show()
    }
}

themes.xml

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.MDCComponents" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>

    <style name="ToggleButtonWithIconOnly" parent="Widget.MaterialComponents.Button.OutlinedButton">
        <item name="iconPadding">0dp</item>
        <item name="android:insetTop">0dp</item>
        <item name="android:insetBottom">0dp</item>
        <item name="android:paddingLeft">12dp</item>
        <item name="android:paddingRight">12dp</item>
        <item name="android:minWidth">48dp</item>
        <item name="android:minHeight">48dp</item>
    </style>

</resources>