react-native-responsive-screen/examples/responsive-screen-orientation-change/App.js

Make React Native views responsive for all devices with the use of 2 simple methods.

// packages
import * as React from 'react';
import { StyleSheet, Text, View, Dimensions } from 'react-native';
import {
  widthPercentageToDP,
  heightPercentageToDP,
  listenOrientationChange,
  removeOrientationListener
} from 'react-native-responsive-screen';
 
export default class App extends React.Component {
  componentWillMount() {
    listenOrientationChange(this);
  }

  componentWillUnMount() {
    removeOrientationListener();
  }

  render() {
    const styles = StyleSheet.create({
      container: {
        flex: 1,
        backgroundColor: 'gray',
        alignItems: 'center',
        justifyContent: 'center',
      },
      responsiveBox: {
        width: widthPercentageToDP('84.5%'),
        height: heightPercentageToDP('17%'),
        borderWidth: 2,
        borderColor: 'orange',
        flexDirection: 'column',
        justifyContent: 'space-around' 
      },
      text: {
        color: 'white'
      }
    });

    return (
      <View style={styles.container}>
        <View style={styles.responsiveBox}>
          <Text style={styles.text}>This box is always of 84.5% width and 17% height.</Text>
          <Text style={styles.text}>Test it by running this example repo in phones/
            emulators with screens of various dimensions and pixel per inch (ppi).</Text>
        </View>
      </View>
    );
  }
}