Fixes of some minor rare bugs.

app/src/main/java/pl/tpolgrabia/urbanexplorer/MainActivity.java

@@ -248,7 +248,7 @@ public class MainActivity extends ActionBarActivity {
             String.valueOf(AppConstants.GPS_LOCATION_UPDATE_FREQ));
 
         Log.d(CLASS_TAG, "Pref GPS location update frequency " + prefGpsUpdateFreq);
-        return NumberUtils.safeParseLong(prefGpsUpdateFreq);
+        return Math.round(NumberUtils.safeParseDouble(prefGpsUpdateFreq)* 60.0 * 1000.0);
     }
 
     @Override

app/src/main/java/pl/tpolgrabia/urbanexplorer/fragments/HomeFragment.java

@@ -8,6 +8,7 @@ import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentActivity;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -42,7 +43,6 @@ public class HomeFragment extends Fragment  {
     private Long pageId;
     private Semaphore loading;
     private List<PanoramioImageInfo> photos;
-    private String locationProvider;
     private boolean noMorePhotos;
 
     public HomeFragment() {
@@ -171,22 +171,23 @@ public class HomeFragment extends Fragment  {
             return;
         }
 
-        if (locationProvider == null) {
-            Log.i(CLASS_TAG, "Location providers not available");
-            Toast.makeText(getActivity(), "Location provicers not available", Toast.LENGTH_SHORT).show();
-            return;
-        }
 
         if (getView() == null) {
             Log.v(CLASS_TAG, "Application still not initialized");
             return;
         }
 
-        final Location location = locationService.getLastKnownLocation(locationProvider);
+        final FragmentActivity activity = getActivity();
+        if (activity == null) {
+            Log.w(CLASS_TAG, "Activity shouldn't be null. No headless fragment");
+            return;
+        }
+
+        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(activity));
 
         if (location == null) {
             Log.i(CLASS_TAG, "Location still not available");
-            Toast.makeText(getActivity(), "Location still not available", Toast.LENGTH_SHORT).show();
+            Toast.makeText(activity, "Location still not available", Toast.LENGTH_SHORT).show();
             return;
         }
 
@@ -198,12 +199,10 @@ public class HomeFragment extends Fragment  {
 
 
         int offset = photos.size();
-
         Log.v(CLASS_TAG, "Fetching additional photos offset: " + offset + ", count: " + PANORAMIA_BULK_DATA_SIZE);
-        Log.d(CLASS_TAG, "Fetching location using " + locationProvider + " provider");
 
         PanoramioUtils.fetchPanoramioImages(
-            getActivity(),
+            activity,
             location.getLatitude(),
             location.getLongitude(),
             fetchRadiusX(),
@@ -224,7 +223,7 @@ public class HomeFragment extends Fragment  {
                     photos.addAll(images);
                     noMorePhotos = images.isEmpty();
                     if (adapter == null) {
-                        locations.setAdapter(new PanoramioAdapter(getActivity(), R.id.list_item, images));
+                        locations.setAdapter(new PanoramioAdapter(activity, R.id.list_item, images));
                     } else {
                         adapter.addAll(images);
                     }
@@ -243,11 +242,17 @@ public class HomeFragment extends Fragment  {
     }
 
     private void fetchPanoramioPhotos() {
-        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(getActivity()));
+        final FragmentActivity activity = getActivity();
+        if (activity == null) {
+            Log.w(CLASS_TAG, "Activity shouldn't be null. It isn't headless fragment");
+            return;
+        }
+
+        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(activity));
         Double radiusX = fetchRadiusX();
         Double radiusY = fetchRadiusY();
         PanoramioUtils.fetchPanoramioImages(
-            getActivity(),
+            activity,
             location.getLatitude(),
             location.getLongitude(),
             radiusX,
@@ -261,7 +266,7 @@ public class HomeFragment extends Fragment  {
                     Long start = (pageId - 1) * pageSize + 1;
                     Long end = pageId * pageSize;
 
-                    ArrayAdapter<PanoramioImageInfo> adapter = new PanoramioAdapter(getActivity(),
+                    ArrayAdapter<PanoramioImageInfo> adapter = new PanoramioAdapter(activity,
                         R.layout.location_item,
                         images);
                     ListView locations = (ListView)getView().findViewById(R.id.locations);
@@ -299,7 +304,6 @@ public class HomeFragment extends Fragment  {
     public void onResume() {
         super.onResume();
         Log.v(CLASS_TAG, "onResume");
-        locationProvider = LocationUtils.getDefaultLocation(getActivity());
         updateLocationInfo();
     }
 
@@ -310,8 +314,13 @@ public class HomeFragment extends Fragment  {
             return;
         }
         TextView locationInfo = (TextView) view.findViewById(R.id.locationInfo);
-        locationService = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);
+        final FragmentActivity activity = getActivity();
-        Location currLocation = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(getActivity()));
+        if (activity == null) {
+            Log.w(CLASS_TAG, "Activity should'nt be null. No headless fragment");
+            return;
+        }
+        locationService = (LocationManager) activity.getSystemService(Context.LOCATION_SERVICE);
+        Location currLocation = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(activity));
         Log.v(CLASS_TAG, "Current location: " + currLocation + ", locationInfo: " + locationInfo);
         if (currLocation != null && locationInfo != null) {
             // update home fragment's location info

app/src/main/java/pl/tpolgrabia/urbanexplorer/fragments/WikiLocationsFragment.java

@@ -8,6 +8,7 @@ import android.location.LocationManager;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentActivity;
 import android.text.Editable;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -40,7 +41,7 @@ public class WikiLocationsFragment extends Fragment {
 
 
     private static final String CLASS_TAG = WikiLocationsFragment.class.getSimpleName();
-    private static final double WIKI_DEF_RADIUS = 10000.0;
+    private static final double WIKI_DEF_RADIUS = 10.0;
     private static final long WIKI_DEF_LIMIT = 100;
     private LocationManager locationService;
     private TextView currentLocation;
@@ -72,11 +73,16 @@ public class WikiLocationsFragment extends Fragment {
     }
 
     private void fetchWikiLocations() {
-        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(getActivity()));
+        final FragmentActivity activity = getActivity();
+        if (activity == null) {
+            Log.w(CLASS_TAG, "Activity shouldn't be null. No headless fragment");
+            return;
+        }
+        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(activity));
 
         if (location == null) {
             Log.i(CLASS_TAG, "Sorry, location is still not available");
-            Toast.makeText(getActivity(), "Sorry, location is still not available", Toast.LENGTH_SHORT).show();
+            Toast.makeText(activity, "Sorry, location is still not available", Toast.LENGTH_SHORT).show();
             return;
         }
 
@@ -85,7 +91,7 @@ public class WikiLocationsFragment extends Fragment {
             return;
         }
 
-        WikiUtils.fetchAppData(getActivity(),
+        WikiUtils.fetchAppData(activity,
             location.getLatitude(),
             location.getLongitude(),
             fetchRadiusLimit(),
@@ -95,7 +101,7 @@ public class WikiLocationsFragment extends Fragment {
                 public void callback(WikiStatus status, final List<WikiAppObject> appObjects) {
                     // handling here wiki locations
                     if (status != WikiStatus.SUCCESS) {
-                        Toast.makeText(getActivity(), "Sorry, currently we have problem with interfacing wiki" +
+                        Toast.makeText(activity, "Sorry, currently we have problem with interfacing wiki" +
                             ": " + status + ". Try again later", Toast.LENGTH_SHORT).show();
                         return;
                     }
@@ -104,7 +110,7 @@ public class WikiLocationsFragment extends Fragment {
 
                     ListView locations = (ListView) getView().findViewById(R.id.wiki_places);
                     locations.setOnItemLongClickListener(new FetchWikiLocationsCallback(WikiLocationsFragment.this, appObjects));
-                    locations.setAdapter(new WikiLocationsAdapter(getActivity(), appObjects));
+                    locations.setAdapter(new WikiLocationsAdapter(activity, appObjects));
                 }
             }
         );
@@ -131,7 +137,12 @@ public class WikiLocationsFragment extends Fragment {
     }
 
     public void updateLocationInfo() {
-        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(getActivity()));
+        final FragmentActivity activity = getActivity();
+        if (activity == null) {
+            Log.w(CLASS_TAG, "Activity shouldn't be null. No headless fragment");
+            return;
+        }
+        final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(activity));
         if (location != null) {
             currentLocation.setText("Your current location: ("
                 + location.getLatitude()

app/src/main/java/pl/tpolgrabia/urbanexplorer/utils/LocationUtils.java

@@ -2,12 +2,18 @@ package pl.tpolgrabia.urbanexplorer.utils;
 
 import android.content.Context;
 import android.location.LocationManager;
+import android.util.Log;
 
 /**
  * Created by tpolgrabia on 28.08.16.
  */
 public class LocationUtils {
     public static String getDefaultLocation(Context ctx) {
+
+        if (ctx == null) {
+            throw new IllegalArgumentException("Context cannot be null");
+        }
+
         LocationManager locationService = (LocationManager) ctx.getSystemService(Context.LOCATION_SERVICE);
         if (locationService.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
             return LocationManager.GPS_PROVIDER;

app/src/main/java/pl/tpolgrabia/urbanexplorer/utils/WikiUtils.java

@@ -179,7 +179,7 @@ public class WikiUtils {
             "?action=query" +
             "&list=geosearch" +
             "&gscoord=" + latitude + "%7C" + longitude +
-            "&gsradius=" + radius +
+            "&gsradius=" + String.format("%.2f", radius) +
             "&gslimit=" + limit +
             "&format=json", JSONObject.class, new AjaxCallback<JSONObject>() {
             @Override