bidah/skill-set/react-native-keyboard-handling

React Native Keyboard Handling

Make the keyboard feel native on both platforms by mapping two fundamentally different OS keyboard models onto one animated value that your UI binds to.

The core mental model (read this first)

iOS and Android expose the keyboard in incompatible ways. Most "broken keyboard" bugs come from ignoring this asymmetry.

• iOS = scheduled animation. The OS tells you up front: "the keyboard will

slide from A to B over 0.25s with this easing curve." You get two snapshots (start/end) plus duration and curve — not intermediate frames. UIKit interpolates for you.

• Android (modern, edge-to-edge) = per-frame insets. The IME is just another

system window. You get a firehose of frames, one inset value per frame, and you drive the animation yourself.

Anything that ignores this asymmetry will feel broken. The fix is to map both

models onto a single shared animated value, then have every consumer (padded

container, translated footer, scroll offset) bind to that one value and stop

caring which platform feeds it.

Decision guide — which tool to reach for

Default recommendation: use `react-native-keyboard-controller`, not React Native's built-in KeyboardAvoidingView. The built-in version relies on LayoutAnimation and the late keyboardDidShow event, which has no per-frame Android primitive — so Android content snaps instead of sliding and the timing never matches the keyboard curve.

Setup

1. Install the library and its peer deps:

``bash npm install react-native-keyboard-controller react-native-reanimated ``

1. Wrap your app root once in KeyboardProvider. This installs the native

WindowInsetsAnimationCallback subscription on Android and handles edge-to-edge automatically: ```tsx import { KeyboardProvider } from "react-native-keyboard-controller";

export default function App() { return ( <KeyboardProvider> {/ ...rest of the app /} </KeyboardProvider> ); } ```

Patterns

Single input / simple screen — drop-in replacement

Same API as RN's KeyboardAvoidingView; swapping the import alone fixes the Android timing/snap problems.

import { KeyboardAvoidingView } from "react-native-keyboard-controller";
<KeyboardAvoidingView behavior="padding" style={{ flex: 1 }}>
  {/* input(s) */}
</KeyboardAvoidingView>

Scrollable form — track the focused input

Auto-scrolls the minimum distance to keep the focused input (and caret/selection) above the keyboard, using the same curve as the keyboard motion. bottomOffset adds breathing room between the input and the keyboard top.

import { KeyboardAwareScrollView } from "react-native-keyboard-controller";
<KeyboardAwareScrollView bottomOffset={50} style={{ flex: 1 }}>
  <TextInput placeholder="Field 1" />
  <TextInput placeholder="Field 2" />
  {/* more inputs */}
</KeyboardAwareScrollView>

Sticky footer / send bar — translate one element only

Translates a single element instead of recomputing flex layout for the whole screen. offset controls the gap when the keyboard is open vs closed.

import { KeyboardStickyView } from "react-native-keyboard-controller";
<KeyboardStickyView offset={{ closed: 0, opened: 20 }}>
  <Footer />
</KeyboardStickyView>

Custom animation — bind to the shared keyboard value

For fully bespoke motion, read the keyboard height as a Reanimated SharedValue and drive any style from it. Works identically on both platforms because the library already merged the two OS models into this one value.

import { useReanimatedKeyboardAnimation } from "react-native-keyboard-controller";
import Animated, { useAnimatedStyle } from "react-native-reanimated";
const { height } = useReanimatedKeyboardAnimation(); // SharedValue, per-frame
const style = useAnimatedStyle(() => ({
  transform: [{ translateY: height.value }],
}));
<Animated.View style={style}>{/* ... */}</Animated.View>;

Pitfalls & gotchas

• Android 15 / SDK 35 covers your inputs. Edge-to-edge is forced by default

from Android 15 (API 35). The system no longer resizes the window when the keyboard appears, so the old adjustResize / windowSoftInputMode contract silently breaks — inputs get covered even though the exact same code worked on Android 14. KeyboardProvider handles edge-to-edge for you; don't rely on adjustResize.

• `will*` events never fire on Android. keyboardWillShow / keyboardWillHide

have no underlying Android primitive, and keyboardDidShow fires after the animation finishes — too late to animate in sync. Don't build animations on the raw Keyboard event listeners for Android.

• Stock `KeyboardAvoidingView` + Android = snap, not slide. It uses

LayoutAnimation, whose timing doesn't match the keyboard curve on Android, so motion looks janky. Prefer the keyboard-controller version.

• Version fragmentation is real. Behavior that "works" on Android 10 can break

differently on Android 11 and again on Android 15. Use a library that abstracts the OS differences instead of hand-rolling per-version logic.

• Wrong component for the job. Using KeyboardAvoidingView for a multi-input

form won't track which input is focused, so the caret can stay hidden — use KeyboardAwareScrollView. Using it to move a single footer forces an unnecessary full-screen layout recompute — use KeyboardStickyView.

Why the asymmetry exists (native reference)

Useful when debugging at the native layer or explaining the design.

• iOS surface: NotificationCenter keyboard notifications carry

keyboardFrameEndUserInfoKey (final frame), keyboardAnimationDurationUserInfoKey (timing), and keyboardAnimationCurveUserInfoKey (a private curve, UIView.AnimationCurve(rawValue: 7)). Two snapshots, not frames.

• Android surface: WindowInsetsAnimationCallback with four hooks —

onPrepare(), onStart(insets), onProgress(insets, runningAnimations) (fires every frame), onEnd(). The library subscribes here and writes each frame's inset into the shared value; on Android 11 it polyfills the per-frame stream where native support is missing.

Source

Based on Margelo's The Go-To Guide for Understanding Keyboards in React Native (Part 1): https://blog.margelo.com/deep-dive-in-keyboard-handling