nativescript-geolocation

NativeScript Geolocation

Geolocation plugin to use for getting current location, monitor movement, etc.

Installation

In Command prompt / Terminal navigate to your application root folder and run:

tns plugin add nativescript-geolocation

Usage

The best way to explore the usage of the plugin is to inspect the demo app in the plugin's root folder. In demo folder you can find the usage of the plugin for TypeScript non-Angular application. Refer to demo/app/main-page.ts.

In short here are the steps:

Import the plugin

TypeScript

import * as geolocation from "nativescript-geolocation";
import { Accuracy } from "ui/enums"; // used to describe at what accuracy the location should be get

Javascript

var geolocation = require("nativescript-geolocation");

Request permissions

geolocation.enableLocationRequest();

Call plugin methods

// Get current location with high accuracy
geolocation.getCurrentLocation({ desiredAccuracy: Accuracy.high, maximumAge: 5000, timeout: 20000 })

API

Properties

Location

Property	Default	Description
latitude	-	The latitude of the geolocation, in degrees.
longitude	-	The longitude of the geolocation, in degrees.
altitude	-	The altitude (if available), in meters above sea level.
horizontalAccuracy	-	The horizontal accuracy, in meters.
verticalAccuracy	-	The vertical accuracy, in meters.
speed	-	The speed, in meters/second over ground.
timestamp	-	The time at which this location was determined.

Options

Property	Default	Description
desiredAccuracy?	Accuracy.high	Specifies desired accuracy in meters.
updateDistance	iOS - no filter	Update distance filter in meters. Specifies how often to update the location (ignored on Android).
updateTime	1 minute	Interval between location updates, in milliseconds (ignored on iOS). Read more in Google document.
minimumUpdateTime	5 secs	Minimum time interval between location updates, in milliseconds (ignored on iOS). Read more in Google document.
maximumAge	-	How old locations to receive in ms.
timeout	5 minutes	How long to wait for a location in ms.
iosAllowsBackgroundLocationUpdates	false	If enabled, UIBackgroundModes key in info.plist is required (check the hint below). Allow the application to receive location updates in background (ignored on Android)
iosPausesLocationUpdatesAutomatically	true	Allow deactivation of the automatic pause of location updates (ignored on Android)

If iosAllowsBackgroundLocationUpdates is set to true, the following code is required in the info.plist file:

<key>UIBackgroundModes</key>
<array>
   <string>location</string>
</array>

Methods

Method	Returns	Description
getCurrentLocation(options: Options)	Promise	Get current location applying the specified options (if any).
watchLocation(successCallback: successCallbackType, errorCallback: errorCallbackType, options: Options)	number	Monitor for location change.
clearWatch(watchId: number)	void	Stop monitoring for location change. Parameter expected is the watchId returned from watchLocation.
enableLocationRequest(always?: boolean)	Promise<void>	Ask for permissions to use location services. The option always is application for iOS only. Read more about its usage .
isEnabled	Promise<boolean>	Resolves true or false based on the location services availability.
distance(loc1: Location, loc2: Location)	number	Calculate the distance between two locations. Returns the distance in meters.

Known Issues

Version Conflicts – Google Play Services

If you have installed multiple plugins that use the Google Play Services you might run into version conflicts. In order to fix this you might pin the version number in your app/App_Resources/Android/app.gradle file:

android {  
  // other stuff here

  project.ext {
    googlePlayServicesVersion = "11.2.+"
  }
}

License

Apache License Version 2.0, January 2004