Overview

I will write what to do after introducing Material Design to the Android project. This is done for Hello world after creating an Android project.

Library introduction

In order to introduce Material Design, write build.gradle as follows.

`build.gradle`


    // material design
    api 'com.google.android.material:material:1.2.0-alpha06'

Changes to styles.xml

Write res / values / styles.xml as follows.

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

Changes to activity_main.xml

Change res / layout / activity_main.xml and check the display.

<?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.MaterialButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Verification"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        />

</androidx.constraintlayout.widget.ConstraintLayout>

result

Confirm that the following display is displayed

Digression

If you leave res / values / styles.xml in the default state, the following error will be displayed.

Error inflating class com.google.android.material.button.MaterialButton

reference

Developer tutorials
- https://material.io/collections/developer-tutorials/#
Getting started with Material Components for Android
- https://material.io/develop/android/docs/getting-started/