How can I use react-native-picker to display content on the page depending on the current value of the picker?

Question

I am trying to use react-native-picker in my project and recently came across this Expo Snack: https://snack.expo.dev/HkM_BcGBW

I want to display content on the page depending on the current value of the picker. For instance, some text right below the picker saying "The option you have selected is [text of the currently-selected option in the picker]." How can I do this?

Answer 1

You can do as the example and use state value to display in the component

import React, { Component } from 'react';
import { Text, View, StyleSheet, Picker } from 'react-native';

export default class App extends Component {
  constructor(props) {
    super(props)
    
    this.state = {
      language: 'java',
    }
  }
  
  render() {
    return (
      <View style={styles.container}>
        <Text style={styles.title}>Unstyled:</Text>
        <Picker
          style={styles.picker} itemStyle={styles.pickerItem}
          selectedValue={this.state.language}
          onValueChange={(itemValue) => this.setState({language: itemValue})}
        >
          <Picker.Item label="Java" value="java" />
          <Picker.Item label="JavaScript" value="js" />
          <Picker.Item label="Python" value="python" />
          <Picker.Item label="Haxe" value="haxe" />
        </Picker>
        
        <Text>The option you have selected is {this.state.language}</Text>
      </View>
    );
  }
}

But do remember

onValueChange={(itemValue) => this.setState({language: itemValue})}

this stores value rather than the label.