keyboard event height react native
import { useEffect, useState } from 'react';
import { Keyboard, KeyboardEvent } from 'react-native';
export const useKeyboard = (): [number] => {
  const [keyboardHeight, setKeyboardHeight] = useState(0);
  function onKeyboardDidShow(e: KeyboardEvent): void {
    setKeyboardHeight(e.endCoordinates.height);
  }
  function onKeyboardDidHide(): void {
    setKeyboardHeight(0);
  }
  useEffect(() => {
    Keyboard.addListener('keyboardDidShow', onKeyboardDidShow);
    Keyboard.addListener('keyboardDidHide', onKeyboardDidHide);
    return (): void => {
      Keyboard.removeListener('keyboardDidShow', onKeyboardDidShow);
      Keyboard.removeListener('keyboardDidHide', onKeyboardDidHide);
    };
  }, []);
  return [keyboardHeight];
};
then in your component:
  const [keyboardHeight] = useKeyboard();
  console.log(keyboardHeight);
