added updating location when you're close to it

app/src/main/java/com/a1/nextlocation/data/Location.java

@@ -35,6 +35,10 @@ public class Location implements Parcelable {
         this(name,getStringFromCoordinates(latCoord,longCoord),description,imageUrl);
     }
 
+    public Location(String name, android.location.Location loc, String description, String imageUrl) {
+        this(name,getStringFromCoordinates(loc.getLatitude(),loc.getLongitude()),description,imageUrl);
+    }
+
     protected Location(Parcel in) {
         name = in.readString();
         coordinates = in.readString();
@@ -127,6 +131,25 @@ public class Location implements Parcelable {
         return Math.floor(distance);
     }
 
+    public static double getDistance(double lat1, double lon1, double lat2, double lon2) {
+        double dlon = lon2 - lon1;
+        double dlat = lat2 - lat1;
+        double a = Math.pow(Math.sin(dlat / 2), 2)
+                + Math.cos(lat1) * Math.cos(lat2)
+                * Math.pow(Math.sin(dlon / 2),2);
+
+        double c = 2 * Math.asin(Math.sqrt(a));
+
+        // Radius of earth in kilometers. Use 3956
+        // for miles
+        double r = 6371;
+
+        // calculate the result
+        double distance = c * r;
+
+        return Math.floor(distance);
+    }
+
     public GeoPoint convertToGeoPoint() {
         return new GeoPoint(this.getLat(),this.getLong());
     }