@nativescript/geolocation
Geolocation plugin to use for getting current location, monitor movement, etc.
Installation
npm install @nativescript/geolocation
Important Breaking Change Version 8.0.0 of the plugin remove the Android permissions from the plugin. The developer is now responsible for adding the permission(s) that their app needs. More info below.
Permissions Requirements
Android
In order to use geolocation on Android, you'll need to add the following permission(s) to your app's AndroidManifest.xml inside the App_Resources/Android/src/main directory:
<!-- Always include this permission -->
<!-- This permission is for "approximate" location data -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!-- Include only if your app benefits from precise location access. -->
<!-- This permission is for "precise" location data -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required only when requesting background location access on
Android 10 (API level 29) and higher. -->
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
More information can be found in the Android docs here.
iOS
If iosAllowsBackgroundLocationUpdates is set to true, the following code is required in the App_Resources/iOS/Info.plist file:
<key>UIBackgroundModes</key>
<array>
<string>location</string>
</array>
Usage
Importing
To use the plugin, you should first import it.
import * as geolocation from '@nativescript/geolocation'
import { CoreTypes } from '@nativescript/core'
CoreTypes.Accuracy // used to describe at what accuracy the location should be get
Request permissions
Before you call any method that gets the user's location, request for the user's permission by calling the enableLocationRequest method. Once the user has granted the permission, you can call the getCurrentLocation() method to get the user's current location.
geolocation.enableLocationRequest().then(() => {
geolocation
.getCurrentLocation({
desiredAccuracy: Accuracy.high,
maximumAge: 5000,
timeout: 20000
})
.then(currentLocation => {
console.log('My current latitude: ', currentLocation.latitude)
})
})
API
Location
| Property | Type | Description |
|---|---|---|
latitude | number | The latitude of the geolocation, in degrees. |
longitude | number | The longitude of the geolocation, in degrees. |
altitude | number | The altitude (if available), in meters above sea level. |
horizontalAccuracy | number | The horizontal accuracy, in meters. |
verticalAccuracy | number | The vertical accuracy, in meters. |
speed | number | The speed, in meters/second over ground. |
timestamp | Date | The time at which this location was determined. |
Options
| Property | Type | Description |
|---|---|---|
desiredAccuracy | CoreTypes.Accuracy | Optional: Specifies if high accuracy or any is required. Defaults to CoreTypes.Accuracy.high which returns the finest location available but use more power than the CoreTypes.Accuracy.any option. Accuracy.any is considered to be about 100 meter accuracy. |
updateDistance | number | Optional: Specifies how often to update the location. Update distance filter in meters. Read more in Apple document and/or Google documents |
updateTime | number | Interval between location updates, in milliseconds (ignored on iOS). Read more in Google document. Defaults to 1 minute |
minimumUpdateTime | number | Optional: Minimum time interval between location updates, in milliseconds (ignored on iOS). Read more in Google document. |
maximumAge | number | Optional: The maximum age of the location data, in ms. |
timeout | number | Optional: It indicates how long, in ms, to wait for a location. Defaults to 5 minutes. |
iosAllowsBackgroundLocationUpdates | boolean | Optional: Indicates whether to allow the application to receive location updates in the background (ignored on Android). Defaults to false. If enabled, the UIBackgroundModes key in Info.plist is required. A. Read more in Apple document |
iosPausesLocationUpdatesAutomatically | boolean | Indicates whether to allow the deactivation of the automatic pause of location updates (ignored on Android). Read more in Apple document |
Methods
| Method | Returns | Description |
|---|---|---|
getCurrentLocation(options: Options) | Promise<Location> | Gets current location applying the specified options (if any). Since version 5.0 of the plugin, it will use requestLocation API for devices using iOS 9.0+. In situation of poor or no GPS signal, but available Wi-Fi it will take 10 sec to return the location.The options parameter is optional. |
watchLocation(successCallback: successCallbackType, errorCallback: errorCallbackType, options?: Options) | number | Monitors location change. |
watchPermissionStatus(permissionCallback: permissionCallbackType, errorCallback: errorCallbackType) | number | (iOS-only)Monitors a change in location permission. |
clearWatch(watchId: number) | void | Stops monitoring a change in location. The watchId parameter is returned from the watchLocation() method. |
enableLocationRequest(always?: boolean, openSettingsIfLocationHasBeenDenied?: boolean | Promise<void> | Asks for permissions to use location services. On iOS if always is true, add the following keys to the Info.plist: NSLocationAlwaysAndWhenInUseUsageDescription (iOS 11.0+) OR NSLocationAlwaysUsageDescription (iOS 8.0-10.0) and NSLocationWhenInUseUsageDescription. Read more about request always usage. On Android SDK >= 29, the always parameter set to true requires the ACCESS_BACKGROUND_LOCATION permission to be added to the AndroidManifest.xml. That results in the user getting a system dialog with the option 'allow all the time' option. Read about Android location permissions here and here. If openSettingsIfLocationHasBeenDenied is true and the permission has previously been denied then the Settings app will open so the user can change the location services permission. See the exception to this. |
isEnabled(options?: Options) | Promise<boolean> | Resolves true or false based on the location services availability. |
distance(loc1: Location, loc2: Location) | number | Calculates the distance between two locations. Returns the distance in meters. |
getIOSLocationManagerStatus() | CLAuthorizationStatus | Returns the status of the Location Authorization permission. |
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. For example, you may encounter the error below when using the nativescript-google-maps-sdk plugin:
Cannot enable the location service. Error: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/internal/zzbck;
To fix that error, you might pin the version number in your app/App_Resources/Android/before-plugins.gradle file (if the file does not exist, create it):
android {
// other stuff here
project.ext {
googlePlayServicesVersion = "16.+"
}
}
Android API level 30 - openSettingsIfLocationHasBeenDenied
If the user has declined the permission twice during the installation lifetime of the app on Android API level 30 , the user won't be taken to the settings even if the openSettingsIfLocationHasBeenDenied option is true for enableLocationRequest().
License
Apache License Version 2.0