cordova-plugin-locationservices-fix
v1.0.2
Published
Android geolocation plugin using Google Play Services Location API.
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Google Location Services for Cordova - Android
This plugin provides information about the device's location, such as latitude and longitude. Common sources of location information include Global Positioning System (GPS) and location inferred from network signals such as IP address, RFID, WiFi and Bluetooth MAC addresses, and GSM/CDMA cell IDs. There is no guarantee that the API returns the device's actual location.
This API is based on the W3C Geolocation API Specification, and use the Google Play Services Location API.
WARNING: Collection and use of geolocation data raises important privacy issues. Your app's privacy policy should discuss how the app uses geolocation data, whether it is shared with any other parties, and the level of precision of the data (for example, coarse, fine, ZIP code level, etc.). Geolocation data is generally considered sensitive because it can reveal user's whereabouts and, if stored, the history of their travels. Therefore, in addition to the app's privacy policy, you should strongly consider providing a just-in-time notice before the app accesses geolocation data (if the device operating system doesn't do so already). That notice should provide the same information noted above, as well as obtaining the user's permission (e.g., by presenting choices for OK and No Thanks). For more information, please see the Privacy Guide.
Installation
The plugin is published on npm:
cordova plugin add cordova-plugin-locationservices
If you wish to use the old Cordova registry, use the previous plugin id:
cordova plugin add fr.louisbl.cordova.locationservices
Then add the Android Support and Google Repository.
Supported Platforms
- Android
Methods
- LocationServices.getCurrentPosition
- LocationServices.watchPosition
- LocationServices.clearWatch
Objects (Read-Only)
- Position
- PositionError
- Coordinates
- Priorities
LocationServices.getCurrentPosition
Returns the device's current position to the geolocationSuccess
callback with a Position
object as the parameter. If there is an
error, the geolocationError
callback is passed a
PositionError
object.
LocationServices.getCurrentPosition(geolocationSuccess,
[geolocationError],
[geolocationOptions]);
Parameters
geolocationSuccess: The callback that is passed the current position.
geolocationError: (Optional) The callback that executes if an error occurs.
geolocationOptions: (Optional) The geolocation options.
Example
// onSuccess Callback
// This method accepts a Position object, which contains the
// current GPS coordinates
//
var onSuccess = function(position) {
alert('Latitude: ' + position.coords.latitude + '\n' +
'Longitude: ' + position.coords.longitude + '\n' +
'Altitude: ' + position.coords.altitude + '\n' +
'Accuracy: ' + position.coords.accuracy + '\n' +
'Altitude Accuracy: ' + position.coords.altitudeAccuracy + '\n' +
'Heading: ' + position.coords.heading + '\n' +
'Speed: ' + position.coords.speed + '\n' +
'Timestamp: ' + position.timestamp + '\n');
};
// onError Callback receives a PositionError object
//
function onError(error) {
alert('code: ' + error.code + '\n' +
'message: ' + error.message + '\n');
}
LocationServices.getCurrentPosition(onSuccess, onError);
LocationServices.watchPosition
Returns the device's current position when a change in position is detected.
When the device retrieves a new location, the geolocationSuccess
callback executes with a Position
object as the parameter. If
there is an error, the geolocationError
callback executes with a
PositionError
object as the parameter.
var watchId = LocationServices.watchPosition(geolocationSuccess,
[geolocationError],
[geolocationOptions]);
Parameters
geolocationSuccess: The callback that is passed the current position.
geolocationError: (Optional) The callback that executes if an error occurs.
geolocationOptions: (Optional) The geolocation options.
Returns
- String: returns a watch id that references the watch position interval. The watch id should be used with
LocationServices.clearWatch
to stop watching for changes in position.
Example
// onSuccess Callback
// This method accepts a `Position` object, which contains
// the current GPS coordinates
//
function onSuccess(position) {
var element = document.getElementById('geolocation');
element.innerHTML = 'Latitude: ' + position.coords.latitude + '<br />' +
'Longitude: ' + position.coords.longitude + '<br />' +
'<hr />' + element.innerHTML;
}
// onError Callback receives a PositionError object
//
function onError(error) {
alert('code: ' + error.code + '\n' +
'message: ' + error.message + '\n');
}
// Options: throw an error if no update is received every 30 seconds.
//
var watchID = LocationServices.watchPosition(onSuccess, onError, { timeout: 30000, priority: LocationServices.priorities.PRIORITY_HIGH_ACCURACY });
geolocationOptions
Optional parameters to customize the retrieval of the geolocation
Position
.
{ maximumAge: 3000, timeout: 5000, enableHighAccuracy: true, priority: LocationServices.priorities.PRIORITY_HIGH_ACCURACY, interval: 6000, fastInterval: 1000 };
Options
enableHighAccuracy: Provides a hint that the application needs the best possible results. It will force the plugin to check if the GPS is enabled before any action. (Boolean)
timeout: The maximum length of time (milliseconds) that is allowed to pass from the call to
LocationServices.getCurrentPosition
orgeolocation.watchPosition
until the correspondinggeolocationSuccess
callback executes. If thegeolocationSuccess
callback is not invoked within this time, thegeolocationError
callback is passed aPositionError.TIMEOUT
error code. (Note that when used in conjunction withgeolocation.watchPosition
, thegeolocationError
callback could be called on an interval everytimeout
milliseconds!) (Number)maximumAge: Accept a cached position whose age is no greater than the specified time in milliseconds. (Number)
priority: The priority of the request is a strong hint for which location sources to use. For example, PRIORITY_HIGH_ACCURACY is more likely to use GPS, and PRIORITY_BALANCED_POWER_ACCURACY is more likely to use WIFI & Cell tower positioning, but it also depends on many other factors (such as which sources are available) and is implementation dependent. (Number)
interval: Set the desired interval for active location updates, in milliseconds.
The location client will actively try to obtain location updates for your application at this interval, so it has a direct influence on the amount of power used by your application. Choose your interval wisely.
This interval is inexact. You may not receive updates at all (if no location sources are available), or you may receive them slower than requested. You may also receive them faster than requested (if other applications are requesting location at a faster interval). The fastest rate that that you will receive updates can be controlled with fastInterval. By default this fastest rate is 6x the interval frequency.
Applications with only the coarse location permission may have their interval silently throttled.
An interval of 0 is allowed, but not recommended, since location updates may be extremely fast on future implementations. (Number)
fastInterval: Explicitly set the fastest interval for location updates, in milliseconds.
This controls the fastest rate at which your application will receive location updates, which might be faster than interval in some situations (for example, if other applications are triggering location updates).
This allows your application to passively acquire locations at a rate faster than it actively acquires locations, saving power.
Unlike interval, this parameter is exact. Your application will never receive updates faster than this value.
If you don't call this method, a fastest interval will be selected for you. It will be a value faster than your active interval (interval).
An interval of 0 is allowed, but not recommended, since location updates may be extremely fast on future implementations. (Number)
LocationServices.clearWatch
Stop watching for changes to the device's location referenced by the
watchID
parameter.
LocationServices.clearWatch(watchID);
Parameters
- watchID: The id of the
watchPosition
interval to clear. (String)
Example
// Options: watch for changes in position, and use the most
// accurate position acquisition method available.
//
var watchID = LocationServices.watchPosition(onSuccess, onError, { enableHighAccuracy: true });
// ...later on...
LocationServices.clearWatch(watchID);
Position
Contains Position
coordinates and timestamp, created by the geolocation API.
Properties
coords: A set of geographic coordinates. (Coordinates)
timestamp: Creation timestamp for
coords
. (Date)
Coordinates
A Coordinates
object is attached to a Position
object that is
available to callback functions in requests for the current position.
It contains a set of properties that describe the geographic coordinates of a position.
Properties
latitude: Latitude in decimal degrees. (Number)
longitude: Longitude in decimal degrees. (Number)
altitude: Height of the position in meters above the ellipsoid. (Number)
accuracy: Accuracy level of the latitude and longitude coordinates in meters. (Number)
altitudeAccuracy: Accuracy level of the altitude coordinate in meters. (Number)
heading: Direction of travel, specified in degrees counting clockwise relative to the true north. (Number)
speed: Current ground speed of the device, specified in meters per second. (Number)
Android Quirks
altitudeAccuracy: Not supported by Android devices, returning null
.
PositionError
The PositionError
object is passed to the geolocationError
callback function when an error occurs with LocationServices.
Properties
code: One of the predefined error codes listed below.
message: Error message describing the details of the error encountered.
Constants
PositionError.PERMISSION_DENIED
- Returned when users do not allow the app to retrieve position information. This is dependent on the platform.
PositionError.POSITION_UNAVAILABLE
- Returned when the device is unable to retrieve a position. In general, this means the device is not connected to a network or can't get a satellite fix.
PositionError.TIMEOUT
- Returned when the device is unable to retrieve a position within the time specified by the
timeout
included ingeolocationOptions
. When used withLocationServices.watchPosition
, this error could be repeatedly passed to thegeolocationError
callback everytimeout
milliseconds.
- Returned when the device is unable to retrieve a position within the time specified by the
Priorities
This object holds the constants to use with priority options.
Constants
- LocationServices.priorities.PRIORITY_HIGH_ACCURACY
- LocationServices.priorities.PRIORITY_BALANCED_POWER_ACCURACY
- LocationServices.priorities.PRIORITY_LOW_POWER
- LocationServices.priorities.PRIORITY_NO_POWER