Flutter: Get Device Screen Width and Height

Knowing the screen width and height can be useful in several scenarios while developing mobile apps. Some of the common use cases include:

• Responsive Design: By knowing the screen size, developers can create a responsive design that adjusts to the size of the screen, ensuring that the content is displayed optimally on different devices.
• Optimizing UI elements: By knowing the screen size, developers can adjust the size of buttons, text, and other UI elements to ensure that they are easy to use and accessible on all devices.
• Image optimization: Based on the screen size, developers can choose to load different versions of images that are optimized for a specific screen size, reducing the overall size of the app and improving performance.

In Flutter, you can get the device screen width by using:

MediaQuery.of(context).size.width;

To get the screen height, use:

MediaQuery.of(context).size.height;

Example

Screenshot:

Full code in main.dart:

// KindaCode.com
// 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(
      // Hide the debug banner
      debugShowCheckedModeBanner: false,
      title: 'Kindacode.com',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final width = MediaQuery.of(context).size.width;
    final height = MediaQuery.of(context).size.height;
    return Scaffold(
      appBar: AppBar(
        title: const Text('Kindacode.com'),
      ),
      body: Center(
        child: Text(
          "Width: $width, height: $height",
          style: const TextStyle(fontSize: 20, color: Colors.purple),
        ),
      ),
    );
  }
}

Hope this helps. Futher reading:

• Flutter: Columns with Percentage Widths
• Using IntrinsicWidth in Flutter: Example & Explanation
• How to set width, height, and padding of TextField in Flutter
• Flutter: Get the Heights of AppBar and CupertinoNavigationBar
• Flutter: Changing App Display Name for Android & iOS
• Android: How to Get SHA Certificate Fingerprints

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