index.js

import React from 'react';
import {DeviceEventEmitter, NativeModules} from 'react-native';

const {BMDPedometer} = NativeModules;

// const EventEmitter = DeviceEventEmitter(BMDPedometer);

export default {
  isStepCountingAvailable: callback => {
    BMDPedometer.isStepCountingAvailable(callback);
  },

  isDistanceAvailable: callback => {
    BMDPedometer.isDistanceAvailable(callback);
  },

  isFloorCountingAvailable: callback => {
    BMDPedometer.isFloorCountingAvailable(callback);
  },

  isPaceAvailable: callback => {
    BMDPedometer.isPaceAvailable(callback);
  },

  isCadenceAvailable: callback => {
    BMDPedometer.isCadenceAvailable(callback);
  },

  startPedometerUpdatesFromDate: (date, handler) => {
    BMDPedometer.startPedometerUpdatesFromDate(date);
    DeviceEventEmitter.addListener('pedometerDataDidUpdate', handler);
  },

  queryPedometerDataBetweenDates: (startDate, endDate, handler) => {
    BMDPedometer.queryPedometerDataBetweenDates(startDate, endDate, handler);
  },

  stopPedometerUpdates: () => {
    BMDPedometer.stopPedometerUpdates();
  }
};