React Native Image Resizer

A React Native module that can create scaled versions of local images (also supports the assets library on iOS).

Setup

Install the package:

• 😻 React Native >= 0.40

npm install --save react-native-image-resizer
react-native link react-native-image-resizer

⚠️ Heads up, breaking change! If you're upgrading react-native-image-resizer to version 1.0.0, please note that the response of createResizedImage changed. You must now read the image uri from property uri of the returned object. Here is an example. Easy, huh?

Older versions:

• 👨 React Native >= 0.29.2 and < 0.40

npm install --save react-native-image-resizer@0.0.12
react-native link react-native-image-resizer

• 👴 React Native >= 0.28 and < 0.29.2

npm install rnpm -g
rnpm install react-native-image-resizer@0.0.12

Android

Note: on latest versions of React Native, you may have an error during the Gradle build on Android (com.android.dex.DexException: Multiple dex files define Landroid/support/v7/appcompat/R$anim). Run cd android && ./gradlew clean to fix this.

Manual linking

Manual link information for Android: Link

Usage example

import ImageResizer from 'react-native-image-resizer';
 
ImageResizer.createResizedImage(imageUri, newWidth, newHeight, compressFormat, quality, rotation, outputPath).then((response) => {
  // response.uri is the URI of the new image that can now be displayed, uploaded...
  // response.path is the path of the new image
  // response.name is the name of the new image with the extension
  // response.size is the size of the new image
}).catch((err) => {
  // Oops, something went wrong. Check that the filename is correct and
  // inspect err to get more details.
});

Sample app

A basic, sample app is available in the example folder. It uses the module to resize a photo from the Camera Roll.

API

promise createResizedImage(path, maxWidth, maxHeight, compressFormat, quality, rotation = 0, outputPath)

The promise resolves with an object containing: path, uri, name and size of the new file. The URI can be used directly as the source of an <Image> component.

Other open-source modules by the folks at BAM

• rn-camera-roll
• react-native-numberpicker-dialog
• react-native-animated-picker
• cordova-plugin-native-routing