Delve into Flutter's UI framework to build high-quality Android apps, from creating contact profiles to enhancing them with themes and API integration, culminating in app publication.

Flutter is Google’s mobile UI framework used for crafting high-quality native interfaces on iOS and Android. This course focuses on building applications for the Android platform.

You’ll start by exploring the intricacies of Flutter and work your way up to implementing a contact profile page for an Android address book.

In the latter half of the course, you’ll learn to work with Flutter themes to spruce up the contact profile app you created. To round out your Flutter experience, you’ll also practice fetching data from a remote Application Programming Interface (API).

You’ll put into practice what you learn using live coding environments embedded within the course. By the time you’re done, you’ll be ready to create your own Android app and publish it to the Google Play Store.

Salahaddin Mohammed

I completed the course "Beginning Flutter: Android Mobile App Development" at the Educative platform. I have easily understood the course because of your great explanation. I want to thank you really!

Thank you letter from a student.

Beginning Flutter: Android Mobile App Development

# The `ThemeData` widget


The Global theme affects the whole app. Global themes are implemented using [`ThemeData`](https://api.flutter.dev/flutter/material/ThemeData-class.html). 

In this lesson, we’ll create and use a Global theme for *Profile Page* using `ThemeData`.

This holds styling information for the material design app. 

* It uses the `brightness` property to assign light or dark color themes to the app. 
* The `appBarTheme` property defines the theme for the AppBar widget. 
* The `iconTheme` property of `AppBarTheme` declares theme selection for the icons used in the app bar, while `iconTheme` property for `ThemeData` widget defines the icon colors for the whole app globally.

```
ThemeData(
 // Define the default brightness and colors for the overall app.
 brightness: Brightness.light,

 //Defines theme for AppBar
 appBarTheme: AppBarTheme(
   color: Colors.white,
   
   //Theme for icons used in AppBar
   iconTheme: IconThemeData(
     color: Colors.black,
   ),
 ),

 //Theme for icons used in the app
 iconTheme: IconThemeData(
   color: Colors.indigo.shade800,
 ),
),

```
## Using `ThemeData` 

Let's see how to implement `ThemeData` for the `MaterialApp` widget.

```
MaterialApp(
 debugShowCheckedModeBanner: false,
 theme: ThemeData(
   // Define the default brightness and colors for the overall app.
   brightness: Brightness.light,
   appBarTheme: AppBarTheme(
     color: Colors.white,
     //Icon theme at AppBar level
     iconTheme: IconThemeData(
       color: Colors.black,
     ),
   ),
   //Icon theme at app level
   iconTheme: IconThemeData(
     color: Colors.indigo.shade800,
   ),
 ),
 home: Scaffold(
   appBar: buildAppBarWidget(),
   body: buildBodyWidget(),
 ),
)

```


In this lesson, you'll learn how to use Global theme in the Flutter app.

Introduction

Hello Flutter !

Build your Contact Profile Page

Flutter Themes

MovieApp: Fetching Data from REST API

Where to Go from Here

Appendix: Installation & Setting up Flutter (Optional)

Global Theme

The `ThemeData` widget

Global Theme

The ThemeData widget

The `ThemeData` widget