ImagePicker.js

// @flow
import Alert from 'utils/AlertUtils';
import { ImagePicker as ExpoImagePicker, Permissions } from 'expo';

export default {
  async launchCameraAsync(options: {
    allowsEditing?: boolean,
    quality?: number
  }): Promise<{ uri?: string }> {
    const { status: cameraPermission } = await Permissions.askAsync(
      Permissions.CAMERA
    );
    const { status: cameraRollPermission } = await Permissions.askAsync(
      Permissions.CAMERA_ROLL
    );
    if (cameraPermission === 'granted' && cameraRollPermission === 'granted') {
      return ExpoImagePicker.launchCameraAsync(options);
    }
    Alert.alert('Oops!', 'We need your permission to open the camera :(');
    return {};
  },

  async launchImageLibraryAsync(options: {
    mediaTypes?: 'Images' | 'Videos' | 'All',
    quality?: number
  }): Promise<{ uri?: string }> {
    const { status: cameraPermission } = await Permissions.askAsync(
      Permissions.CAMERA
    );
    const { status: cameraRollPermission } = await Permissions.askAsync(
      Permissions.CAMERA_ROLL
    );
    if (cameraPermission === 'granted' && cameraRollPermission === 'granted') {
      console.log('granted');
      return ExpoImagePicker.launchImageLibraryAsync(options);
    }
    Alert.alert(
      'Oops!',
      'We need your permission to open your image library :('
    );
    return {};
  }
};