Added settings for gps update frequenciy policies.

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

@@ -9,4 +9,6 @@ public class AppConstants {
     public static final float MIN_DISTANCE = 100;
     public static final float PAMNORAMIO_DEF_RADIUSX = 0.05f;
     public static final float PAMNORAMIO_DEF_RADIUSY = 0.05f;
+    public static final long GPS_LOCATION_UPDATE_FREQ = 15000;
+    public static final float GPS_LOCATION_DISTANCE_FREQ = MIN_DISTANCE;
 }

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

@@ -2,9 +2,11 @@ package pl.tpolgrabia.urbanexplorer;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.location.Location;
 import android.location.LocationManager;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.provider.Settings;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
@@ -30,6 +32,7 @@ import pl.tpolgrabia.urbanexplorer.fragments.WikiLocationsFragment;
 import pl.tpolgrabia.urbanexplorer.handlers.SwipeHandler;
 import pl.tpolgrabia.urbanexplorer.utils.ImageLoaderUtils;
 import pl.tpolgrabia.urbanexplorer.utils.LocationUtils;
+import pl.tpolgrabia.urbanexplorer.utils.NumberUtils;
 import pl.tpolgrabia.urbanexplorer.views.CustomInterceptor;
 import pl.tpolgrabia.urbanexplorer.views.SwipeFrameLayout;
 
@@ -221,13 +224,33 @@ public class MainActivity extends ActionBarActivity {
         if (locationProvider != null) {
             LocationManager locationService = (LocationManager)getSystemService(LOCATION_SERVICE);
             locationService.requestLocationUpdates(locationProvider,
-                AppConstants.MIN_TIME,
-                AppConstants.MIN_DISTANCE,
+                fetchGpsUpdateFreq(),
+                fetchGpsDistanceFreq(),
                 locationCallback);
             locationServicesActivated = true;
         }
     }
 
+    private Float fetchGpsDistanceFreq() {
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        String prefDistanceUpdateFreq = sharedPreferences.getString(
+            "pref_gps_distance_freq",
+            String.valueOf(AppConstants.GPS_LOCATION_DISTANCE_FREQ));
+
+        Log.d(CLASS_TAG, "Pref GPS distance update frequency " + prefDistanceUpdateFreq);
+        return NumberUtils.safeParseFloat(prefDistanceUpdateFreq);
+    }
+
+    private Long fetchGpsUpdateFreq() {
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        String prefGpsUpdateFreq = sharedPreferences.getString(
+            "pref_gps_update_freq",
+            String.valueOf(AppConstants.GPS_LOCATION_UPDATE_FREQ));
+
+        Log.d(CLASS_TAG, "Pref GPS location update frequency " + prefGpsUpdateFreq);
+        return NumberUtils.safeParseLong(prefGpsUpdateFreq);
+    }
+
     @Override
     protected void onPause() {
         super.onPause();
@@ -251,10 +274,8 @@ public class MainActivity extends ActionBarActivity {
             case LOCATION_SETTINGS_REQUEST_ID:
                 String locationProvider = LocationUtils.getDefaultLocation(this);
                 if (locationProvider == null) {
-                    // sadly, nothing to do except from notifing user that program is not enable working
-//                    Toast.makeText(this, "Sorry location services are not working." +
-//                            " Program cannot work properly - check location settings to allow program working correctly",
-//                        Toast.LENGTH_LONG).show();
+
+                    // launching settings activity to allow the user switching on location service
 
                     Intent intent = new Intent(this, SettingsActivity.class);
                     startActivity(intent);

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

@@ -289,7 +289,7 @@ public class HomeFragment extends Fragment  {
         final SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
         final String pref_panoramio_radiusy = sharedPreferences.getString(
             "pref_panoramio_radiusy",
-            String.valueOf(AppConstants.PAMNORAMIO_DEF_RADIUSX));
+            String.valueOf(AppConstants.PAMNORAMIO_DEF_RADIUSY));
         Log.d(CLASS_TAG, "Panoramio radiusy pref equals " + pref_panoramio_radiusy);
         return Double.parseDouble(
             pref_panoramio_radiusy);

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

@@ -32,4 +32,18 @@ public class NumberUtils {
             return null;
         }
     }
+
+    public static Float safeParseFloat(String s) {
+        if (s == null || "".equals(s.trim())) {
+            return null;
+        }
+
+        String trimmed = s.trim();
+
+        try {
+            return Double.parseDouble(trimmed);
+        } catch (NumberFormatException e) {
+            return null;
+        }
+    }
 }

app/src/main/res/xml/urban_expl_settings.xml

@@ -41,4 +41,25 @@
 
     </PreferenceCategory>
 
+    <PreferenceCategory
+            android:title="GPS tracking settings"
+            android:key="pref_gps_settings">
+
+        <EditTextPreference
+                android:key="pref_gps_update_freq"
+                android:title="GPS update frequency"
+                android:summary="Update time of GPS location in minutes"
+                android:defaultValue="15.0"
+                android:inputType="numberDecimal" />
+
+        <EditTextPreference
+                android:key="pref_gps_distance_freq"
+                android:title="GPS distance frequency"
+                android:summary="Update distance of GPS location in meters"
+                android:defaultValue="100.0"
+                android:inputType="numberDecimal" />
+
+
+    </PreferenceCategory>
+
 </PreferenceScreen>