3 files changed, 30 insertions, 5 deletions
diff --git a/main/src/cgeo/geocaching/apps/AbstractApp.java b/main/src/cgeo/geocaching/apps/AbstractApp.java
index ef56f87..f3715f3 100644
--- a/main/src/cgeo/geocaching/apps/AbstractApp.java
+++ b/main/src/cgeo/geocaching/apps/AbstractApp.java
@@ -5,6 +5,8 @@ import cgeo.geocaching.MainActivity;
 import cgeo.geocaching.cgeoapplication;
 import cgeo.geocaching.utils.ProcessUtils;
 
+import org.apache.commons.lang3.StringUtils;
+
 import android.content.Intent;
 
 public abstract class AbstractApp implements App {
@@ -26,7 +28,7 @@ public abstract class AbstractApp implements App {
 
     @Override
     public boolean isInstalled() {
-        if (ProcessUtils.isInstalled(packageName)) {
+        if (StringUtils.isNotEmpty(packageName) && ProcessUtils.isInstalled(packageName)) {
             return true;
         }
         return MainActivity.isIntentAvailable(intent);
diff --git a/main/src/cgeo/geocaching/apps/cache/navi/StreetviewApp.java b/main/src/cgeo/geocaching/apps/cache/navi/StreetviewApp.java
index 012b94f..e2c0828 100644
--- a/main/src/cgeo/geocaching/apps/cache/navi/StreetviewApp.java
+++ b/main/src/cgeo/geocaching/apps/cache/navi/StreetviewApp.java
@@ -4,6 +4,7 @@ import cgeo.geocaching.R;
 import cgeo.geocaching.cgeoapplication;
 import cgeo.geocaching.activity.ActivityMixin;
 import cgeo.geocaching.geopoint.Geopoint;
+import cgeo.geocaching.utils.ProcessUtils;
 
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
@@ -12,13 +13,16 @@ import android.net.Uri;
 
 class StreetviewApp extends AbstractPointNavigationApp {
 
+    private static final String PACKAGE_NAME_STREET_VIEW = "com.google.android.street";
+    private static final boolean INSTALLED = ProcessUtils.isInstalled(PACKAGE_NAME_STREET_VIEW);
+
     StreetviewApp() {
         super(getString(R.string.cache_menu_streetview), null);
     }
 
     @Override
     public boolean isInstalled() {
-        return true;
+        return INSTALLED;
     }
 
     @Override
@@ -26,7 +30,7 @@ class StreetviewApp extends AbstractPointNavigationApp {
         try {
             activity.startActivity(new Intent(Intent.ACTION_VIEW,
                     Uri.parse("google.streetview:cbll=" + point.getLatitude() + "," + point.getLongitude())));
-        } catch (ActivityNotFoundException e) {
+        } catch (final ActivityNotFoundException e) {
             ActivityMixin.showToast(activity, cgeoapplication.getInstance().getString(R.string.err_application_no));
         }
     }
diff --git a/main/src/cgeo/geocaching/utils/ProcessUtils.java b/main/src/cgeo/geocaching/utils/ProcessUtils.java
index b566b79..1c05e84 100644
--- a/main/src/cgeo/geocaching/utils/ProcessUtils.java
+++ b/main/src/cgeo/geocaching/utils/ProcessUtils.java
@@ -3,8 +3,11 @@ package cgeo.geocaching.utils;
 import cgeo.geocaching.cgeoapplication;
 
 import android.content.Intent;
+import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 
+import java.util.List;
+
 public final class ProcessUtils {
 
     private ProcessUtils() {
@@ -12,9 +15,25 @@ public final class ProcessUtils {
     }
 
     public static boolean isInstalled(final String packageName) {
-        return getLaunchIntent(packageName) != null;
+        return (getLaunchIntent(packageName) != null) || hasPackageInstalled(packageName);
+    }
+
+    /**
+     * This will find installed applications even without launch intent (e.g. the streetview plugin).
+     */
+    private static boolean hasPackageInstalled(final String packageName) {
+        final List<PackageInfo> packs = cgeoapplication.getInstance().getPackageManager().getInstalledPackages(0);
+        for (final PackageInfo packageInfo : packs) {
+            if (packageName.equals(packageInfo.packageName)) {
+                return true;
+            }
+        }
+        return false;
     }
 
+    /**
+     * This will find applications, which can be launched.
+     */
     public static Intent getLaunchIntent(final String packageName) {
         if (packageName == null) {
             return null;
@@ -24,7 +43,7 @@ public final class ProcessUtils {
             // This can throw an exception where the exception type is only defined on API Level > 3
             // therefore surround with try-catch
             return packageManager.getLaunchIntentForPackage(packageName);
-        } catch (Exception e) {
+        } catch (final Exception e) {
             return null;
         }
     }