Tutorial React Native KeyboardAvoidingView for beginners

You'll learn how to use React Native's KeyboardAvoidingView component to handle the keyboard overlapping input fields, a common issue in mobile apps. It is for beginners who want a clear, practical example of implementing this in a chat-like interface.

You'll see how to set up a new Expo project, display messages with FlatList, create a message bubble component, and add a styled input field. I also explain how to wrap your UI with KeyboardAvoidingView and SafeAreaView to ensure inputs remain visible when the keyboard appears.

What's inside

Creating a new Expo React Native project with a navigation template
Setting up dummy chat messages and rendering them with FlatList
Building a BubbleMessage component with conditional styling
Using SafeAreaView and KeyboardAvoidingView to manage keyboard overlap
Styling the FlatList container and message bubbles for better UI
Creating a reusable Input component with placeholder and styles
Handling Android and iOS keyboard behavior differences
Tips on extending functionality like auto-scrolling in chat apps

I start by creating a new React Native project using Expo CLI with a template that includes React Navigation and TypeScript. The command used is:

This saves time by preconfiguring navigation, so you can focus on the KeyboardAvoidingView implementation. The project structure includes an folder with tabs, and I show how to clean up default screens to prepare for the chat UI.

Setting up dummy chat messages and rendering them with FlatList

To simulate a chat, I use an array of message objects with and properties. These messages are rendered using React Native's FlatList component.

Key points:

The prop receives the messages array.
returns a JSX element for each message.
A uses the message index converted to string to avoid TypeScript errors.
Initially, messages are rendered as simple Text components before creating a custom bubble.

Building a BubbleMessage component with conditional styling

I create a component to display each chat message with styles depending on the author:

Props: (string) and (string).
Background color changes: blue for user messages, gray for bot messages.
Max width set to 80% of the screen.
Alignment changes based on author: user messages align right, bot messages align left.
Padding and border radius added for a bubble effect.

This component improves readability and UI clarity by visually distinguishing message sources.

Using SafeAreaView and KeyboardAvoidingView to manage keyboard overlap

To prevent the keyboard from covering inputs, I wrap the main content inside:

to respect device notches and status bars.
to adjust the UI when the keyboard appears.

The uses props like (e.g., 'padding' or 'height') to control how the view shifts. This setup works on both iOS and Android, though Android may require additional tweaks.

Styling the FlatList container and message bubbles for better UI

The FlatList receives a with horizontal padding and a property to space messages vertically. I note that React Native 0.71+ supports for layout spacing.

Message bubbles have padding, border radius, and conditional background colors to create a polished chat interface. Removing default center alignment on the container allows messages to align left or right properly.

Creating a reusable Input component with placeholder and styles

I add an component as a styled wrapper around React Native's :

Placeholder text with white color.
Styles include border width, border color, padding, border radius, and text color.
The component is simple but reusable for chat message input.

This modular approach keeps the main screen clean and makes it easier to extend input functionality later.

Handling Android and iOS keyboard behavior differences

I mention that KeyboardAvoidingView behavior can differ between platforms. For example, some props or styles may not work exactly the same on Android.

I recommend testing on both platforms and adjusting the prop or adding extra padding if needed. I also hint at extending functionality like auto-scrolling FlatList when new messages appear.

Tips on extending functionality like auto-scrolling in chat apps

Beyond the basics, I suggest you can enhance the chat experience by:

Automatically scrolling FlatList to the bottom when new messages arrive.
Customizing keyboard behavior further.
Adding more complex input handling or animations.

These improvements are left as exercises but are common next steps for chat apps using KeyboardAvoidingView.

Resources

CourseReact Native course

Fundamentals through shipping: the concepts behind the prompts, with lifetime access.

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