Pavol FulopandFacebook GitHub Bot
f85e2ecc40
Summary: Currently, height is sometimes the only valid option for pushing `TextInput` up in the layout on Android. The problem is when switching keyboards. For instance, switching from ABC to emojis. This will trigger keyboard show events and recalculate the height for the `KeyboardAvoidingView`. Since the keyboard is still showing, the view has the height that was previously calculated and thus `frame` represents that. This means the `frame.height` has adjustments for the keyboard calculated in it, but it is used the same way as if the keyboard was not showing. This results in wrong calculation and the input showing at the incorrect place in the layout (mostly hidden under the keyboard) This fix simply uses the previous calculation to offset `frame.height`, resulting in the correct height and smooth switching between keyboards. It's also scoped only to height mode since that's where the problem shows. _Note: I mention android here, but it fixes it for both platforms. It's just that iOS usually works best with different behaviour so it's rarely used there._ ## Changelog [General] [Added] - Include `this.state.bottom` when calculating new keyboard height to fix android keyboard switching Pull Request resolved: https://github.com/facebook/react-native/pull/34749 Test Plan: With simple code: ```jsx import { StatusBar } from "expo-status-bar"; import React from "react"; import { KeyboardAvoidingView, StyleSheet, Text, TextInput, View, } from "react-native"; export default function App() { return ( <KeyboardAvoidingView style={styles.container} behavior="height"> <Text>Open up App.js to start working on your app!</Text> <StatusBar style="auto" /> <TextInput style={{ backgroundColor: "red", width: "100%" }} /> </KeyboardAvoidingView> ); } const styles = StyleSheet.create({ container: { padding: 32, flex: 1, backgroundColor: "#fff", alignItems: "center", justifyContent: "space-between", }, }); ``` Notice the consistency of the TextInput after the changes, while before it would just move around more you switch the keyboards. | Before | After | |---|---| |  |  | Reviewed By: cipolleschi Differential Revision: D39718812 Pulled By: NickGerleman fbshipit-source-id: 2550182e846f3f8e719d727fa8e6d87165faebf6
React Native
Learn once, write anywhere:
Build mobile apps with React.
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React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.
- Declarative. React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug.
- Component-Based. Build encapsulated components that manage their state, then compose them to make complex UIs.
- Developer Velocity. See local changes in seconds. Changes to JavaScript code can be live reloaded without rebuilding the native app.
- Portability. Reuse code across iOS, Android, and other platforms.
React Native is developed and supported by many companies and individual core contributors. Find out more in our ecosystem overview.
Contents
- Requirements
- Building your first React Native app
- Documentation
- Upgrading
- How to Contribute
- Code of Conduct
- License
📋 Requirements
React Native apps may target iOS 12.4 and Android 5.0 (API 21) or newer. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS. Tools like Expo can be used to work around this.
🎉 Building your first React Native app
Follow the Getting Started guide. The recommended way to install React Native depends on your project. Here you can find short guides for the most common scenarios:
📖 Documentation
The full documentation for React Native can be found on our website.
The React Native documentation discusses components, APIs, and topics that are specific to React Native. For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.
The source for the React Native documentation and website is hosted on a separate repo, @facebook/react-native-website.
🚀 Upgrading
Upgrading to new versions of React Native may give you access to more APIs, views, developer tools, and other goodies. See the Upgrading Guide for instructions.
React Native releases are discussed in this discussion repo.
👏 How to Contribute
The main purpose of this repository is to continue evolving React Native core. We want to make contributing to this project as easy and transparent as possible, and we are grateful to the community for contributing bug fixes and improvements. Read below to learn how you can take part in improving React Native.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Contributing Guide
Read our Contributing Guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React Native.
Open Source Roadmap
You can learn more about our vision for React Native in the Roadmap.
Good First Issues
We have a list of good first issues that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
Discussions
Larger discussions and proposals are discussed in @react-native-community/discussions-and-proposals.
📄 License
React Native is MIT licensed, as found in the LICENSE file.
React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.