react-native-volley

React Native module that wraps Google's Volley HTTP library for Android.

Background: On Android in React Native Fetch API or XMLHttpRequest depend on the google.webkit API and WebView. On some devices, such as smartwatches for 'Wear OS by Google' (formerly 'Android Wear'), webkit is not supported. With Volley you can make webkit independent HTTP requests on Android.

Installation

npm install react-native-volley

- or -

yarn add react-native-volley

In your renative.json file add the following:

//...
"plugins": {
    // ...
    "react-native-volley": {
        "version": "^0.1.2", // <- Replace with latest version
        "android": {
            "package": "com.reactnativevolley.VolleyPackage",
            "implementations": [
                "'com.android.volley:volley:1.1.1'"
            ]
        },
        "androidwear": {
            "package": "com.reactnativevolley.VolleyPackage",
            "implementations": [
                "'com.android.volley:volley:1.1.1'"
            ]
        }
    }
}

Usage

react-native-volley mimics Fetch API but with limitations (see example with options below).

import Volley from 'react-native-volley';

// Somewhere in an `async` function ...
const response = await Volley.fetch('https://reactnative.dev/movies.json')
const movies = await response.json().movies
// ...

react-native-volley is built for Android as a workaround for missing webkit support. If you like to use it cross platform, please read the cross platform example.

Example with options

// Example POST method implementation:
async function postData(url = '', data = {}) {
  // Default options are marked with *
  const response = await Volley.fetch(url, {
    method: 'POST', // *GET, POST, PUT, DELETE, ...
    cache: 'no-cache', // *default, no-cache, no-store, force-cache
    headers: {
      'Content-Type': 'application/json'
      // 'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: JSON.stringify(data) // body data type must match "Content-Type" header
    // Other options - that might be available on Fetch API - are ignored
  });
  return response.json(); // Parses JSON response into native JavaScript objects
}

Then somewhere in an async function in your code...

const data = await postData('https://example.com/answer', { answer: 42 })
console.log(data); // JSON data parsed by `response.json()` call

Cross platform example

If you like to use Volley cross platform and only when needed, best practice is to build a tiny service that handles the different cases for you.

something like ../services/HttpService.ts

import Volley from 'react-native-volley';

// Add `useVolleyForFetch` logic.
import { Platform } from 'react-native'
const useVolleyForFetch = Platform.OS === 'android'

// Using ReNative? You might want to do this instead...
// import { isPlatformAndroidwear } from 'renative'
// const useVolleyForFetch = isPlatformAndroidwear

export default {
  async fetch(url: string, opts: object = {}) {
    if (useVolleyForFetch) {
      // Device should use Volley.
      return Volley.fetch(url, opts)
    } else {
      // We can use Fetch API (or something else).
      return fetch(url, opts)
    }
  }
}

Then in some component...

import HttpService from '../path/to/services/HttpService.ts'
// In some `async` function...
const response = await HttpService.fetch('https://reactnative.dev/movies.json')
// ...

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT