Fixed refreshing location info.

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

@@ -53,6 +53,11 @@ public class MainActivity extends ActionBarActivity implements GestureDetector.O
     private String locationProvider;
     private boolean locationServicesActivated = false;
 
+
+    public StandardLocationListener getLocationCallback() {
+        return locationCallback;
+    }
+
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         gestureDetector.onTouchEvent(event);
@@ -81,7 +86,7 @@ public class MainActivity extends ActionBarActivity implements GestureDetector.O
 
         getSupportFragmentManager()
             .beginTransaction()
-            .add(R.id.fragments, new HomeFragment())
+            .replace(R.id.fragments, new HomeFragment())
             .commit();
 
         // lLinearLayout locations = (LinearLayout) findViewById(R.id.locations);

app/src/main/java/pl/tpolgrabia/urbanexplorer/callbacks/StandardLocationListener.java

@@ -5,18 +5,21 @@ import android.location.LocationListener;
 import android.os.Bundle;
 import android.util.Log;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Created by tpolgrabia on 28.08.16.
  */
 public class StandardLocationListener implements LocationListener {
     private static final String CLASS_TAG = StandardLocationListener.class.getSimpleName();
-    private StandardLocationListenerCallback locationChangedCallback;
+    private List<StandardLocationListenerCallback> locationChangedCallbacks = new ArrayList<>();
 
     @Override
     public void onLocationChanged(Location location) {
         Log.i(CLASS_TAG, "Location provider changed: " + location);
-        if (locationChangedCallback != null) {
-            locationChangedCallback.callback(location);
+        for (StandardLocationListenerCallback callback : locationChangedCallbacks) {
+            callback.callback(location);
         }
     }
 
@@ -35,7 +38,11 @@ public class StandardLocationListener implements LocationListener {
         Log.i(CLASS_TAG, "Provider " + provider + " disabled");
     }
 
-    public void setLocationChangedCallback(StandardLocationListenerCallback locationChangedCallback) {
-        this.locationChangedCallback = locationChangedCallback;
+    public void addCallback(StandardLocationListenerCallback callback) {
+        locationChangedCallbacks.add(callback);
+    }
+
+    public boolean removeCallback(StandardLocationListenerCallback callback) {
+        return locationChangedCallbacks.remove(callback);
     }
 }

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

@@ -21,6 +21,7 @@ import org.json.JSONObject;
 import pl.tpolgrabia.urbanexplorer.MainActivity;
 import pl.tpolgrabia.urbanexplorer.R;
 import pl.tpolgrabia.urbanexplorer.callbacks.StandardLocationListener;
+import pl.tpolgrabia.urbanexplorer.callbacks.StandardLocationListenerCallback;
 import pl.tpolgrabia.urbanexplorer.dto.PanoramioImageInfo;
 import pl.tpolgrabia.urbanexplorer.utils.LocationUtils;
 import pl.tpolgrabia.urbanexplorer.utils.NumberUtils;
@@ -49,9 +50,7 @@ public class HomeFragment extends Fragment  {
     private ImageView nextWidget;
     private Long photosCount;
     private TextView locationsResultInfo;
-    private StandardLocationListener locationCallback = new StandardLocationListener();
     private LocationManager locationService;
-    private String locationProvider = null;
 
     public HomeFragment() {
         // Required empty public constructor
@@ -61,8 +60,14 @@ public class HomeFragment extends Fragment  {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         aq = new AQuery(getActivity());
-        locationProvider = LocationUtils.getDefaultLocation(getActivity());
-        locationService = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);
+        MainActivity mainActivity = ((MainActivity) getActivity());
+        mainActivity.getLocationCallback()
+            .addCallback(new StandardLocationListenerCallback() {
+                @Override
+                public void callback(Location location) {
+                    updateLocationInfo();
+                }
+            });
 
     }
 
@@ -177,6 +182,7 @@ public class HomeFragment extends Fragment  {
             }
         });
 
+
         return inflatedView;
     }
 
@@ -274,4 +280,18 @@ public class HomeFragment extends Fragment  {
         return safeParseDouble(radiusyTextView.getText());
     }
 
+    @Override
+    public void onResume() {
+        updateLocationInfo();
+    }
+
+    public void updateLocationInfo() {
+        TextView locationInfo = (TextView) getView().findViewById(R.id.locationInfo);
+        locationService = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);
+        Location currLocation = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(getActivity()));
+        if (currLocation != null) {
+            // update home fragment's location info
+            locationInfo.setText("Location: " + currLocation.getLatitude() + "," + currLocation.getLongitude());
+        }
+    }
 }

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

@@ -18,8 +18,10 @@ import com.androidquery.callback.AjaxCallback;
 import com.androidquery.callback.AjaxStatus;
 import org.json.JSONException;
 import org.json.JSONObject;
+import pl.tpolgrabia.urbanexplorer.MainActivity;
 import pl.tpolgrabia.urbanexplorer.R;
 import pl.tpolgrabia.urbanexplorer.adapters.WikiLocationsAdapter;
+import pl.tpolgrabia.urbanexplorer.callbacks.StandardLocationListenerCallback;
 import pl.tpolgrabia.urbanexplorer.callbacks.WikiResponseCallback;
 import pl.tpolgrabia.urbanexplorer.callbacks.WikiStatus;
 import pl.tpolgrabia.urbanexplorer.dto.WikiPage;
@@ -139,15 +141,28 @@ public class WikiLocationsFragment extends Fragment {
             }
         });
 
+        MainActivity mainActivity = (MainActivity) getActivity();
+        mainActivity.getLocationCallback().addCallback(new StandardLocationListenerCallback() {
+            @Override
+            public void callback(Location location) {
+                updateLocationInfo();
+            }
+        });
+
         return inflatedView;
     }
 
     @Override
     public void onResume() {
         super.onResume();
+        updateLocationInfo();
+    }
 
+    public void updateLocationInfo() {
         final Location location = locationService.getLastKnownLocation(LocationUtils.getDefaultLocation(getActivity()));
-        currentLocation.setText("Location: " + location.getLatitude() + "," + location.getLongitude());
+        if (location != null) {
+            currentLocation.setText("Location: " + location.getLatitude() + "," + location.getLongitude());
+        }
     }
 
     @Override