Display Dropdown in React Native

The React native picker component is similar to a dropdown that allows you to select a value from the multiple options given.

The basic Picker component is as follows −

<Picker selectedValue = {selectedelement} onValueChange = {updatefunc}>
   <Picker.Item label = "ItemLabel" value = "ItemValue" />
      ...
      ...
      ...
   <Picker.Item label = "ItemLabel" value = "ItemValue" />
</Picker>

To work with picker component, you need to import it first from react-native as follows −

import { Picker } from 'react-native'

Picker Properties

Example: Display of Dropdown using Picker in ReactNative

This example shows the dropdown using the Picker component.

The code is as follows −

<Picker selectedValue = {this.state.user} onValueChange = {this.updateUser}>
      <Picker.Item label = "Steve" value = "steve" />
      <Picker.Item label = "Ellen" value = "ellen" />
      <Picker.Item label = "Maria" value = "maria" />
   </Picker>

There are 3 values given to the Picker Steve, Ellen and Maria. Here is a complete code to display it.

import React, { Component } from 'react';
import { View, Text, Picker, StyleSheet } from 'react-native'
class PickerExample extends Component {
   state = {user: ''}
   updateUser = (user) => {
      this.setState({ user: user })
   }
   render() {
      return (
         <View>
            <Picker selectedValue = {this.state.user} onValueChange = {this.updateUser}>
            <Picker.Item label = "Steve" value = "steve" />
            <Picker.Item label = "Ellen" value = "ellen" />
            <Picker.Item label = "Maria" value = "maria" />
         </Picker>
         <Text style = {styles.text}>{this.state.user}</Text>
            </View>
         )
      }
   }
   export default PickerExample
   const styles = StyleSheet.create({
   text: {
      fontSize: 30,
      alignSelf: 'center',
      color: 'red'
   }
})

The this.state.user is used for picker control. The updateUser function will be triggered when a user is picked.

Output

When you open the name from picker you should see as below −