Gain insights into responsive and adaptive UI in Flutter, explore powerful widgets, external packages, and hands-on coding to build user-friendly, cross-platform applications.

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Flutter is an open-source software development kit (SDK) created by Google to support cross-platform application development for online and in the most popular consumer operating systems. Understanding Flutter’s user interface (UI) approach can help unlock robust application development across all these environments.

This course will introduce you to the core concepts of responsive and adaptive UI in Flutter. You’ll start with common layout widgets before exploring application development using the most powerful widgets. Next, you’ll explore external packages that can extend responsiveness and adaptiveness beyond the core Flutter UI. At each step, you’ll see examples comparing and contrasting responsive and adaptive UIs with applications that do not invoke these principles. Finally, you’ll build functional widgets and application UI with hands-on coding environments

By the end of this course, you’ll be able to build user-friendly applications in Flutter using responsive and adaptive UI principles.

Responsive and Adaptive UI in Flutter

The `Row` and `Column` widgets are used for content that fits on the screen. When we have a larger or unknown number of items displayed in a vertical or horizontal orientation, we should use the `ListView` widget.

When considering responsive UI, there isn’t much that we need to do for a `ListView`. Most of the work is done by the children of `ListView` or by its parent. In this lesson, we’ll combine `ListView` with `OrientationBuilder` to make sure that our list looks good in both portrait and landscape mode.

## A vertical list in portrait mode

We’ll reuse some code from the last lesson to create a list of items in an e-commerce application:

The `Row` and `Column` widgets are used for content that fits on the screen. When we have a larger or unknown number of items displayed in a vertical or horizontal orientation, we should use the `ListView` widget.

When considering responsive UI, there isn’t much that we need to do for a `ListView`. Most of the work is done by the children of `ListView` or by its parent. In this lesson, we’ll combine `ListView` with `OrientationBuilder` to make sure that our list looks good in both portrait and landscape mode.

# A vertical list in portrait mode

We’ll reuse some code from the last lesson to create a list of items in an e-commerce application:

Learn to combine a ListView and an OrientationBuilder widget to get a Flutter application UI to respond to changes in the device's orientation.

Introduction

Basic Single-Child Layout Widgets

Basic Multi-Child Layout Widgets

The Problem of Starting with a Smartphone

Measure your Sizes - Responsive UI Widgets

Different Widgets for Different Sizes

Avoid Gigantic Widgets

Adaptive Design

External Packages

Conclusion

Appendix: Other Resources

The ListView Widget