3 files changed, 24 insertions, 10 deletions
diff --git a/main/src/cgeo/geocaching/Geocache.java b/main/src/cgeo/geocaching/Geocache.java
index f6e3f18..a03f515 100644
--- a/main/src/cgeo/geocaching/Geocache.java
+++ b/main/src/cgeo/geocaching/Geocache.java
@@ -25,6 +25,7 @@ import cgeo.geocaching.list.StoredList;
 import cgeo.geocaching.network.HtmlImage;
 import cgeo.geocaching.settings.Settings;
 import cgeo.geocaching.utils.CancellableHandler;
+import cgeo.geocaching.utils.ImageUtils;
 import cgeo.geocaching.utils.LazyInitializedList;
 import cgeo.geocaching.utils.Log;
 import cgeo.geocaching.utils.LogTemplateProvider;
@@ -159,6 +160,10 @@ public class Geocache implements ICache, IWaypoint {
 
     private Handler changeNotificationHandler = null;
 
+    // Images whose URL contains one of those patterns will not be available on the Images tab
+    // for opening into an external application.
+    private final String[] NO_EXTERNAL = new String[]{"geocheck.org"};
+
     /**
      * Create a new cache. To be used everywhere except for the GPX parser
      */
@@ -1723,7 +1728,7 @@ public class Geocache implements ICache, IWaypoint {
         Html.fromHtml(getDescription(), new ImageGetter() {
             @Override
             public Drawable getDrawable(final String source) {
-                if (!urls.contains(source)) {
+                if (!urls.contains(source) && !ImageUtils.containsPattern(source, NO_EXTERNAL)) {
                     images.add(new Image(source, geocode));
                     urls.add(source);
                 }
diff --git a/main/src/cgeo/geocaching/network/HtmlImage.java b/main/src/cgeo/geocaching/network/HtmlImage.java
index 70cd095..5d713eb 100644
--- a/main/src/cgeo/geocaching/network/HtmlImage.java
+++ b/main/src/cgeo/geocaching/network/HtmlImage.java
@@ -132,7 +132,7 @@ public class HtmlImage implements Html.ImageGetter {
     // decoding.
     public Observable<BitmapDrawable> fetchDrawable(final String url) {
 
-        if (StringUtils.isBlank(url) || isCounter(url)) {
+        if (StringUtils.isBlank(url) || ImageUtils.containsPattern(url, BLOCKED)) {
             return Observable.from(getTransparent1x1Image(resources));
         }
 
@@ -394,12 +394,4 @@ public class HtmlImage implements Html.ImageGetter {
         bfOptions.inSampleSize = scale;
     }
 
-    private static boolean isCounter(final String url) {
-        for (String entry : BLOCKED) {
-            if (StringUtils.containsIgnoreCase(url, entry)) {
-                return true;
-            }
-        }
-        return false;
-    }
 }
diff --git a/main/src/cgeo/geocaching/utils/ImageUtils.java b/main/src/cgeo/geocaching/utils/ImageUtils.java
index 9f47ead..eb91724 100644
--- a/main/src/cgeo/geocaching/utils/ImageUtils.java
+++ b/main/src/cgeo/geocaching/utils/ImageUtils.java
@@ -3,6 +3,7 @@ package cgeo.geocaching.utils;
 import cgeo.geocaching.CgeoApplication;
 import cgeo.geocaching.compatibility.Compatibility;
 
+import org.apache.commons.lang3.StringUtils;
 import org.eclipse.jdt.annotation.NonNull;
 import org.eclipse.jdt.annotation.Nullable;
 
@@ -225,4 +226,20 @@ public final class ImageUtils {
         }
         return Uri.fromFile(file);
     }
+
+    /**
+     * Check if the URL contains one of the given substrings.
+     *
+     * @param url the URL to check
+     * @param patterns a list of substrings to check against
+     * @return <tt>true</tt> if the URL contains at least one of the patterns, <tt>false</tt> otherwise
+     */
+    public static boolean containsPattern(final String url, final String[] patterns) {
+        for (String entry : patterns) {
+            if (StringUtils.containsIgnoreCase(url, entry)) {
+                return true;
+            }
+        }
+        return false;
+    }
 }