index.js

import 'react-native-gesture-handler'
import 'react-native-get-random-values'
import * as Sentry from '@sentry/react-native'
import { AppRegistry, Text, KeyboardAvoidingView, Platform } from 'react-native'
import App from './src/App'

import BackgroundGeolocation from './src/react-native-background-geolocation'

Text.defaultProps = Text.defaultProps || {}
Text.defaultProps.allowFontScaling = false
KeyboardAvoidingView.defaultProps.behavior =
  Platform.OS == 'ios' ? 'padding' : null

if (process.env.NODE_ENV === 'production') {
  Sentry.init({
    dsn: 'https://9ba1ba3df3174145b8d276c9d84b6b52@sentry.io/5175128',
  })
}

// Make BackgroundGeolocation API global for handy access in Javascript Debugger console
global.BackgroundGeolocation = BackgroundGeolocation

import BackgroundFetch from 'react-native-background-fetch'

AppRegistry.registerComponent('ThaiAlert', () => App)

/**
 * BackgroundGeolocation Headless JS task.
 * For more information, see:  https://github.com/transistorsoft/react-native-background-geolocation/wiki/Android-Headless-Mode
 */
let BackgroundGeolocationHeadlessTask = async event => {
  let params = event.params
  console.log('[BackgroundGeolocation HeadlessTask] -', event.name, params)

  switch (event.name) {
    case 'heartbeat':
      // Use await for async tasks
      let location = await BackgroundGeolocation.getCurrentPosition({
        samples: 1,
        persist: false,
        extras: {
          triggerType: 'headlessTask',
        },
      })
      console.log(
        '[BackgroundGeolocation HeadlessTask] - getCurrentPosition:',
        location,
      )
      break
  }
}

BackgroundGeolocation.registerHeadlessTask(BackgroundGeolocationHeadlessTask)

/**
 * BackgroundFetch Headless JS Task.
 * For more information, see:  https://github.com/transistorsoft/react-native-background-fetch#config-boolean-enableheadless-false
 */
let BackgroundFetchHeadlessTask = async event => {
  console.log('[BackgroundFetch HeadlessTask] start')
  // Important:  await asychronous tasks when using HeadlessJS.
  /* DISABLED
  let location = await BackgroundGeolocation.getCurrentPosition({persist: false, samples: 1});
  console.log('- current position: ', location);
  // Required:  Signal to native code that your task is complete.
  // If you don't do this, your app could be terminated and/or assigned
  // battery-blame for consuming too much time in background.
  */
  console.log('[BackgroundFetch HeadlessTask] finished')

  BackgroundFetch.finish()
}

// Register your BackgroundFetch HeadlessTask
BackgroundFetch.registerHeadlessTask(BackgroundFetchHeadlessTask)