From d937a4d6bb60cdc3e36491f7d3e4a52681f6a510 Mon Sep 17 00:00:00 2001
From: Emux <devemux86@gmail.com>
Date: Wed, 21 Sep 2016 13:09:36 +0300
Subject: [PATCH] VectorTileLayer: check tile source on detach by @Longri,
 fixes #175

---
 vtm/src/org/oscim/layers/tile/vector/VectorTileLayer.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/vtm/src/org/oscim/layers/tile/vector/VectorTileLayer.java b/vtm/src/org/oscim/layers/tile/vector/VectorTileLayer.java
index 8835f1d0..80dd7722 100644
--- a/vtm/src/org/oscim/layers/tile/vector/VectorTileLayer.java
+++ b/vtm/src/org/oscim/layers/tile/vector/VectorTileLayer.java
@@ -1,5 +1,6 @@
 /*
  * Copyright 2013 Hannes Janetzek
+ * Copyright 2016 Longri
  *
  * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
  *
@@ -175,7 +176,8 @@ public class VectorTileLayer extends TileLayer {
     @Override
     public void onDetach() {
         super.onDetach();
-        mTileSource.close();
+        if (mTileSource != null)
+            mTileSource.close();
     }
 
     public void callThemeHooks(MapTile tile, RenderBuckets layers, MapElement element,