Calculate distance for valid positions (fix #1738)

1 files changed, 7 insertions, 4 deletions

diff --git a/src/org/traccar/DistanceHandler.java b/src/org/traccar/DistanceHandler.java
index 1586d116b..c737457f6 100644
--- a/src/org/traccar/DistanceHandler.java
+++ b/src/org/traccar/DistanceHandler.java
@@ -1,5 +1,6 @@
 /*
  * Copyright 2015 Amila Silva
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,11 +41,13 @@ public class DistanceHandler extends BaseDataHandler {
                 distance = ((Number) last.getAttributes().get(Event.KEY_DISTANCE)).doubleValue();
             }
 
-            distance += DistanceCalculator.distance(
-                    position.getLatitude(), position.getLongitude(),
-                    last.getLatitude(), last.getLongitude());
+            if (position.getValid()) {
+                distance += DistanceCalculator.distance(
+                        position.getLatitude(), position.getLongitude(),
+                        last.getLatitude(), last.getLongitude());
 
-            distance = BigDecimal.valueOf(distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
+                distance = BigDecimal.valueOf(distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
+            }
         }
 
         position.set(Event.KEY_DISTANCE, distance);