Adding updateDistance option for Android

Author: denisraison

README.md

@@ -69,7 +69,7 @@ geolocation.getCurrentLocation({ desiredAccuracy: Accuracy.high, maximumAge: 500
 | Property | Default | Description |
 | --- | --- | --- |
 | desiredAccuracy? | Accuracy.high | This will return the finest location available but use more power than `any` option. `Accuracy.any` is considered to be about 100 meter accuracy. Using a coarse accuracy such as this often consumes less power. |
-| updateDistance | iOS - no filter | Update distance filter in meters. Specifies how often to update the location (ignored on Android). Read more in [Apple document](https://developer.apple.com/documentation/corelocation/cllocationmanager/1423500-distancefilter?language=objc) |
+| updateDistance | No filter | Update distance filter in meters. Specifies how often to update the location. Read more in [Apple document](https://developer.apple.com/documentation/corelocation/cllocationmanager/1423500-distancefilter?language=objc) and/or [Google documents](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest.html#setSmallestDisplacement(float)) |
 | updateTime | 1 minute | Interval between location updates, in milliseconds (ignored on iOS). Read more in [Google document](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest#setInterval(long)).|
 | minimumUpdateTime | 5 secs | Minimum time interval between location updates, in milliseconds (ignored on iOS). Read more in [Google document](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest#setFastestInterval(long)).|
 | maximumAge | - | How old locations to receive in ms.  |

src/geolocation.android.ts

@@ -104,6 +104,8 @@ function _getLocationRequest(options: Options): any {
     let minUpdateTime = options.minimumUpdateTime === 0 ?
         0 : options.minimumUpdateTime || Math.min(updateTime, fastestTimeUpdate);
     mLocationRequest.setFastestInterval(minUpdateTime);
+    if (options.updateDistance)
+        mLocationRequest.setSmallestDisplacement(options.updateDistance);
     if (options.desiredAccuracy === Accuracy.high) {
         mLocationRequest.setPriority(com.google.android.gms.location.LocationRequest.PRIORITY_HIGH_ACCURACY);
     } else {