@react-native-picker/picker

What is @react-native-picker/picker?

@react-native-picker/picker is a React Native package that provides a cross-platform Picker component for selecting values from a list. It supports both iOS and Android, offering a consistent user experience across platforms.

What are @react-native-picker/picker's main functionalities?

Basic Picker

This code demonstrates a basic Picker component where users can select between 'Java' and 'JavaScript'. The selected value is displayed above the Picker.

import React, { useState } from 'react';
import { View, Text } from 'react-native';
import { Picker } from '@react-native-picker/picker';

const BasicPicker = () => {
  const [selectedValue, setSelectedValue] = useState('java');

  return (
    <View>
      <Text>Selected: {selectedValue}</Text>
      <Picker
        selectedValue={selectedValue}
        onValueChange={(itemValue, itemIndex) => setSelectedValue(itemValue)}
      >
        <Picker.Item label="Java" value="java" />
        <Picker.Item label="JavaScript" value="js" />
      </Picker>
    </View>
  );
};

export default BasicPicker;

Custom Picker Styles

This code demonstrates how to apply custom styles to the Picker component and its container. The Picker is styled to have a specific height and width, and the selected value is displayed with custom text styling.

import React, { useState } from 'react';
import { View, Text, StyleSheet } from 'react-native';
import { Picker } from '@react-native-picker/picker';

const CustomPicker = () => {
  const [selectedValue, setSelectedValue] = useState('java');

  return (
    <View style={styles.container}>
      <Text style={styles.text}>Selected: {selectedValue}</Text>
      <Picker
        selectedValue={selectedValue}
        style={styles.picker}
        onValueChange={(itemValue, itemIndex) => setSelectedValue(itemValue)}
      >
        <Picker.Item label="Java" value="java" />
        <Picker.Item label="JavaScript" value="js" />
      </Picker>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  text: {
    fontSize: 18,
    marginBottom: 10,
  },
  picker: {
    height: 50,
    width: 150,
  },
});

export default CustomPicker;

Picker with Multiple Items

This code demonstrates a Picker component with multiple items. Users can select from 'Java', 'JavaScript', 'Python', and 'C++'. The selected value is displayed above the Picker.

import React, { useState } from 'react';
import { View, Text } from 'react-native';
import { Picker } from '@react-native-picker/picker';

const MultiItemPicker = () => {
  const [selectedValue, setSelectedValue] = useState('java');

  return (
    <View>
      <Text>Selected: {selectedValue}</Text>
      <Picker
        selectedValue={selectedValue}
        onValueChange={(itemValue, itemIndex) => setSelectedValue(itemValue)}
      >
        <Picker.Item label="Java" value="java" />
        <Picker.Item label="JavaScript" value="js" />
        <Picker.Item label="Python" value="python" />
        <Picker.Item label="C++" value="cpp" />
      </Picker>
    </View>
  );
};

export default MultiItemPicker;

Other packages similar to @react-native-picker/picker

react-native-picker-select

react-native-picker-select is another popular package for creating Picker components in React Native. It offers more customization options and supports placeholder text, custom icons, and styling. Compared to @react-native-picker/picker, it provides a more flexible and feature-rich API but may require more setup.

react-native-modal-selector

react-native-modal-selector provides a modal-based Picker component for React Native. It allows users to select values from a list displayed in a modal dialog. This package is useful for scenarios where a modal-based selection is preferred over a dropdown. It offers a different user experience compared to @react-native-picker/picker.

README

@react-native-picker/picker

Android	iOS	PickerIOS	Windows	MacOS

Supported Versions

@react-native-picker/picker	react-native	react-native-windows
>= 2.0.0	0.61+	0.64+
>= 1.16.0	0.61+	0.61+
>= 1.2.0	0.60+ or 0.59+ with Jetifier	N/A
>= 1.0.0	0.57	N/A

Getting started

$ npm install @react-native-picker/picker --save

or

$ yarn add @react-native-picker/picker

For React Native v0.60 and above (Autolinking)

As react-native@0.60 and above supports autolinking there is no need to run the linking process. Read more about autolinking here. This is supported by react-native-windows@0.64 and above.

iOS

CocoaPods on iOS needs this extra step:

npx pod-install

Android

No additional step is required.

Windows (expand for details)

Windows

Usage in Windows without autolinking requires the following extra steps:

Add the ReactNativePicker project to your solution.

1. Open the solution in Visual Studio 2019
2. Right-click Solution icon in Solution Explorer > Add > Existing Project Select D:\dev\RNTest\node_modules\@react-native-picker\picker\windows\ReactNativePicker\ReactNativePicker.vcxproj

windows/myapp.sln

Add a reference to ReactNativePicker to your main application project. From Visual Studio 2019:

Right-click main application project > Add > Reference... Check ReactNativePicker from Solution Projects.

app.cpp

Add #include "winrt/ReactNativePicker.h" to the headers included at the top of the file.

Add PackageProviders().Append(winrt::ReactNativePicker::ReactPackageProvider()); before InitializeComponent();.

MacOS

CocoaPods on MacOS needs this extra step (called from the MacOS directory)

pod install

React Native below 0.60 (Link and Manual Installation)

The following steps are only necessary if you are working with a version of React Native lower than 0.60

Mostly automatic installation

$ react-native link @react-native-picker/picker

Manual installation

iOS

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ @react-native-picker/picker and add RNCPicker.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNCPicker.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

Android

1. Open application file (android/app/src/main/java/[...]/MainApplication.java)

• Add import com.reactnativecommunity.picker.RNCPickerPackage; to the imports at the top of the file
• Add new RNCPickerPackage() to the list returned by the getPackages() method

1. Append the following lines to android/settings.gradle:

   include ':@react-native-picker_picker'
   project(':@react-native-picker_picker').projectDir = new File(rootProject.projectDir, 	'../node_modules/@react-native-picker/picker/android')
   

2. Insert the following lines inside the dependencies block in android/app/build.gradle:

     implementation project(path: ':@react-native-picker_picker')
   

MacOS

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ @react-native-picker/picker and add RNCPicker.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNCPicker.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

RTL Support

you need to add android:supportsRtl="true" to AndroidManifest.xml

   <application
      ...
      android:supportsRtl="true">

Usage

Import Picker from @react-native-picker/picker:

import {Picker} from '@react-native-picker/picker';

Create state which will be used by the Picker:

const [selectedLanguage, setSelectedLanguage] = useState();

Add Picker like this:

<Picker
  selectedValue={selectedLanguage}
  onValueChange={(itemValue, itemIndex) =>
    setSelectedLanguage(itemValue)
  }>
  <Picker.Item label="Java" value="java" />
  <Picker.Item label="JavaScript" value="js" />
</Picker>

If you want to open/close picker programmatically on android (available from version 1.16.0+), pass ref to Picker:

const pickerRef = useRef();

function open() {
  pickerRef.current.focus();
}

function close() {
  pickerRef.current.blur();
}

return <Picker
  ref={pickerRef}
  selectedValue={selectedLanguage}
  onValueChange={(itemValue, itemIndex) =>
    setSelectedLanguage(itemValue)
  }>
  <Picker.Item label="Java" value="java" />
  <Picker.Item label="JavaScript" value="js" />
</Picker>

Props

• Inherited View props...

• onValueChange
• selectedValue
• style
• testID
• enabled
• mode
• prompt
• itemStyle
• selectionColor

---

Reference

Props

onValueChange

Callback for when an item is selected. This is called with the following parameters:

• itemValue: the value prop of the item that was selected
• itemPosition: the index of the selected item in this picker

Type	Required
function	No

---

selectedValue

Value matching value of one of the items. Can be a string or an integer.

Type	Required
any	No

---

style

Type	Required
pickerStyleType	No

---

testID

Used to locate this view in end-to-end tests.

Type	Required
string	No

---

enabled

If set to false, the picker will be disabled, i.e. the user will not be able to make a selection.

Type	Required	Platform
bool	No	Android, Web, Windows

---

mode

On Android, specifies how to display the selection items when the user taps on the picker:

• 'dialog': Show a modal dialog. This is the default.
• 'dropdown': Shows a dropdown anchored to the picker view

Type	Required	Platform
enum('dialog', 'dropdown')	No	Android

---

dropdownIconColor

On Android, specifies color of dropdown triangle. Input value should be value that is accepted by react-native processColor function.

Type	Required	Platform
ColorValue	No	Android

---

dropdownIconRippleColor

On Android, specifies ripple color of dropdown triangle. Input value should be value that is accepted by react-native processColor function.

Type	Required	Platform
ColorValue	No	Android

---

prompt

Prompt string for this picker, used on Android in dialog mode as the title of the dialog.

Type	Required	Platform
string	No	Android

---

itemStyle

Style to apply to each of the item labels.

Type	Required	Platform
text styles	No	iOS, Windows

numberOfLines

On Android & iOS, used to truncate the text with an ellipsis after computing the text layout, including line wrapping, such that the total number of lines does not exceed this number. Default is '1'

Type	Required	Platform
number	No	Android, iOS

onBlur

Type	Required	Platform
function	No	Android

onFocus

Type	Required	Platform
function	No	Android

selectionColor

Type	Required	Platform
ColorValue	No	iOS

Methods

blur (Android only, lib version 1.16.0+)

Programmatically closes picker

focus (Android only, lib version 1.16.0+)

Programmatically opens picker

PickerItemProps

Props that can be applied to individual Picker.Item

label

Displayed value on the Picker Item

Type	Required
string	Yes

value

Actual value on the Picker Item

Type	Required
number,string	Yes

color

Displayed color on the Picker Item

Type	Required
ColorValue	No

fontFamily

Displayed fontFamily on the Picker Item

Type	Required
string	No

style

Style to apply to individual item labels.

Type	Required	Platform
ViewStyleProp	No	Android

enabled

If set to false, the specific item will be disabled, i.e. the user will not be able to make a selection

@default: true

Type	Required	Platform
boolean	No	Android

contentDescription

Sets the content description to the Picker Item

Type	Required	Platform
string	No	Android

PickerIOS

Props

• Inherited View props...
• itemStyle
• onValueChange
• selectedValue
• selectionColor
• themeVariant

---

Reference

Props

itemStyle

Type	Required
text styles	No

---

onValueChange

Type	Required
function	No

---

selectedValue

Type	Required
any	No

---

selectionColor

Type	Required	Platform
ColorValue	No	iOS

---

themeVariant

Type	Required
enum('light', 'dark')	No