Allow getting the network location within pebble settings for sunrise/sunset calculation

It is also possible to set the location manually
On Android >=6 the required permission will be requested when pressing the button in settings.

app/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="com.fsck.k9.permission.READ_MESSAGES" />
     <uses-permission android:name="android.permission.READ_CALENDAR" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 
     <uses-feature
         android:name="android.hardware.bluetooth"

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/SettingsActivity.java

@@ -1,17 +1,28 @@
 package nodomain.freeyourgadget.gadgetbridge.activities;
 
+import android.Manifest;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.location.Criteria;
+import android.location.Location;
+import android.location.LocationManager;
 import android.os.Bundle;
+import android.preference.EditTextPreference;
 import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.PreferenceCategory;
+import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.LocalBroadcastManager;
 import android.widget.Toast;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.IOException;
 import java.util.List;
+import java.util.Locale;
 
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
@@ -19,13 +30,14 @@ import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandPreferencesActi
 import nodomain.freeyourgadget.gadgetbridge.util.FileUtils;
 import nodomain.freeyourgadget.gadgetbridge.util.GB;
 
-import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_GENDER;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_HEIGHT_CM;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_SLEEP_DURATION;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_WEIGHT_KG;
 import static nodomain.freeyourgadget.gadgetbridge.model.ActivityUser.PREF_USER_YEAR_OF_BIRTH;
 
 public class SettingsActivity extends AbstractSettingsActivity {
+    private static final Logger LOG = LoggerFactory.getLogger(SettingsActivity.class);
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -114,6 +126,33 @@ public class SettingsActivity extends AbstractSettingsActivity {
             category.removePreference(pref);
         }
 
+        pref = findPreference("location_aquire");
+        pref.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+            public boolean onPreferenceClick(Preference preference) {
+                LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
+                Criteria criteria = new Criteria();
+                if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
+                    ActivityCompat.requestPermissions(SettingsActivity.this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 0);
+                }
+                String provider = locationManager.getBestProvider(criteria, false);
+                if (provider != null) {
+                    Location location = locationManager.getLastKnownLocation(provider);
+                    String latitude = String.format(Locale.US, "%.6g", location.getLatitude());
+                    String longitude = String.format(Locale.US, "%.6g", location.getLongitude());
+                    LOG.info("got location. Lat: " + latitude + " Lng: " + longitude);
+                    EditTextPreference pref_latitude = (EditTextPreference) findPreference("location_latitude");
+                    EditTextPreference pref_longitude = (EditTextPreference) findPreference("location_longitude");
+                    pref_latitude.setText(latitude);
+                    pref_longitude.setText(longitude);
+                    pref_latitude.setSummary(latitude);
+                    pref_longitude.setSummary(longitude);
+                } else {
+                    LOG.warn("No location provider found, did you deny location permission?");
+                }
+                return true;
+            }
+        });
+
         // Get all receivers of Media Buttons
         Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
 
@@ -146,6 +185,8 @@ public class SettingsActivity extends AbstractSettingsActivity {
                 "pebble_emu_addr",
                 "pebble_emu_port",
                 "pebble_reconnect_attempts",
+                "location_latitude",
+                "location_longitude",
                 "canned_reply_suffix",
                 "canned_reply_1",
                 "canned_reply_2",

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/AlarmReceiver.java

@@ -19,11 +19,10 @@ import java.util.GregorianCalendar;
 import nodomain.freeyourgadget.gadgetbridge.BuildConfig;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.model.CalendarEventSpec;
-import nodomain.freeyourgadget.gadgetbridge.service.DeviceCommunicationService;
 import nodomain.freeyourgadget.gadgetbridge.util.Prefs;
 
 public class AlarmReceiver extends BroadcastReceiver {
-    private static final Logger LOG = LoggerFactory.getLogger(DeviceCommunicationService.class);
+    private static final Logger LOG = LoggerFactory.getLogger(AlarmReceiver.class);
 
     public AlarmReceiver() {
         Context context = GBApplication.getContext();
@@ -55,7 +54,7 @@ public class AlarmReceiver extends BroadcastReceiver {
 
         float latitude = prefs.getFloat("location_latitude", 0);
         float longitude = prefs.getFloat("location_longitude", 0);
-
+        LOG.info("got longitude/latitude from preferences: " + latitude + "/" + longitude);
         GregorianCalendar[] sunriseTransitSetTomorrow = SPA.calculateSunriseTransitSet(dateTimeTomorrow, latitude, longitude, DeltaT.estimate(dateTimeTomorrow));
 
         CalendarEventSpec calendarEventSpec = new CalendarEventSpec();

app/src/main/res/values/strings.xml

@@ -42,8 +42,6 @@
     <string name="pref_header_datetime">Date and Time</string>
     <string name="pref_title_datetime_syctimeonconnect">Sync time</string>
     <string name="pref_summary_datetime_syctimeonconnect">Sync time to device when connecting and when time or timezone changes on Android</string>
-    <string name="pref_title_location_latitude">Latitude</string>
-    <string name="pref_title_location_longitude">Longitude</string>
 
     <string name="pref_title_theme">Theme</string>
     <string name="pref_theme_light">Light</string>
@@ -77,11 +75,18 @@
     <string name="pref_title_pebble_activitytracker">Preferred Activitytracker</string>
     <string name="pref_title_enable_pebblekit">Allow 3rd Party Android App Access</string>
     <string name="pref_summary_enable_pebblekit">Enable experimental support for Android Apps using PebbleKit</string>
+
+    <string name="pref_header_location">Location</string>
+    <string name="pref_title_location_aquire">Aquire Location</string>
+    <string name="pref_title_location_latitude">Latitude</string>
+    <string name="pref_title_location_longitude">Longitude</string>
+
     <string name="pref_title_pebble_forceprotocol">Force Notification Protocol</string>
     <string name="pref_summary_pebble_forceprotocol">This option forces using the latest notification protocol depending on the firmware version. ENABLE ONLY IF YOU KNOW WHAT YOU ARE DOING!</string>
     <string name="pref_title_pebble_forceuntested">Enable untested features</string>
     <string name="pref_summary_pebble_forceuntested">Enable features that are untested. ENABLE ONLY IF YOU KNOW WHAT YOU ARE DOING!</string>
     <string name="pref_title_pebble_reconnect_attempts">Reconnection Attempts</string>
+
     <string name="not_connected">not connected</string>
     <string name="connecting">connecting</string>
     <string name="connected">connected</string>

app/src/main/res/xml/preferences.xml

@@ -32,14 +32,6 @@
             android:key="datetime_synconconnect"
             android:summary="@string/pref_summary_datetime_syctimeonconnect"
             android:title="@string/pref_title_datetime_syctimeonconnect" />
-        <EditTextPreference
-            android:defaultValue="0"
-            android:key="location_latitude"
-            android:title="@string/pref_title_location_latitude" />
-        <EditTextPreference
-            android:defaultValue="0"
-            android:key="location_longitude"
-            android:title="@string/pref_title_location_longitude" />
     </PreferenceCategory>
     <PreferenceCategory
         android:key="pref_key_notifications"
@@ -204,7 +196,6 @@
             android:key="pref_key_pebble"
             android:title="@string/pref_title_pebble_settings">
             <PreferenceCategory
-                android:key="pref_key_general"
                 android:title="@string/pref_header_general">
                 <CheckBoxPreference
                     android:defaultValue="false"
@@ -226,7 +217,20 @@
                     android:summary="%s" />
             </PreferenceCategory>
             <PreferenceCategory
-                android:key="pref_key_development"
+                android:title="@string/pref_header_location">
+            <Preference
+                android:key="location_aquire"
+                android:title="@string/pref_title_location_aquire"/>
+            <EditTextPreference
+                android:defaultValue="0"
+                android:key="location_latitude"
+                android:title="@string/pref_title_location_latitude" />
+            <EditTextPreference
+                android:defaultValue="0"
+                android:key="location_longitude"
+                android:title="@string/pref_title_location_longitude" />
+            </PreferenceCategory>
+            <PreferenceCategory
                 android:title="@string/pref_header_development">
                 <CheckBoxPreference
                     android:defaultValue="false"