Take a photo & save to camera roll.

takePhoto.js

import { CameraRoll } from 'react-native'

_takePhoto = async () => {
  const result = await ImagePicker.launchCameraAsync({
    allowEditing: false,
    exif: true
  });

  if (!result.cancelled) {
    this.setState({ image: result.uri });
  }
  this._uploadImage(this.state.image);
  CameraRoll.saveToCameraRoll(this.state.image);
};