How to create a gradient background AppBar in Flutter

Gradients help you display smooth transitions between two or more colors. The example below will show you how to create an app bar with a gradient background in Flutter. We can achieve the goal without using any third-party plugins.

Example

Screenshot:

The code:

// main.dart
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
        // Remove the debug banner
        debugShowCheckedModeBanner: false,
        title: 'KindaCode.com',
        home: HomePage());
  }
}

class HomePage extends StatelessWidget {
  const HomePage({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // implement the app bar
      appBar: AppBar(
        title: const Text('KindaCode.com'),
        flexibleSpace: Container(
          decoration: const BoxDecoration(
            gradient: LinearGradient(
                begin: Alignment.centerLeft,
                end: Alignment.centerRight,
                colors: [Colors.red, Colors.orange, Colors.indigo]),
          ),
        ),
      ),
    );
  }
}

Our AppBar has both a gradient background color and the functionalities of a standard material AppBar.

Further reading:

• Flutter SliverAppBar Example (with Explanations)
• Flutter Autocomplete example
• Flutter: Add a Search Field to an App Bar (2 Approaches)
• Flutter: SliverGrid example
• Create a Custom NumPad (Number Keyboard) in Flutter

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