WIP #571 Native foreground servise with active location tracking

android/app/src/main/AndroidManifest.xml

@@ -56,6 +56,10 @@
                 <action android:name="com.google.firebase.MESSAGING_EVENT" />
             </intent-filter>
         </service>
+        <service
+            android:name=".LocationUpdatesService"
+            android:enabled="true"
+            android:exported="true" />
         <receiver android:name=".NotificationActionReceiver"  android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED"/>

android/app/src/main/java/com/keyboardcrumbs/hassclient/LocationUpdatesService.java

@@ -0,0 +1,358 @@
+package com.keyboardcrumbs.hassclient;
+
+import android.app.ActivityManager;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Configuration;
+import android.location.Location;
+import android.os.Binder;
+import android.os.Build;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+import android.os.Looper;
+import androidx.annotation.NonNull;
+import androidx.core.app.NotificationCompat;
+import androidx.localbroadcastmanager.content.LocalBroadcastManager;
+
+import android.util.Log;
+
+import com.google.android.gms.location.FusedLocationProviderClient;
+import com.google.android.gms.location.LocationCallback;
+import com.google.android.gms.location.LocationRequest;
+import com.google.android.gms.location.LocationResult;
+import com.google.android.gms.location.LocationServices;
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+
+/**
+ * A bound and started service that is promoted to a foreground service when location updates have
+ * been requested and all clients unbind.
+ *
+ * For apps running in the background on "O" devices, location is computed only once every 10
+ * minutes and delivered batched every 30 minutes. This restriction applies even to apps
+ * targeting "N" or lower which are run on "O" devices.
+ *
+ * This sample show how to use a long-running service for location updates. When an activity is
+ * bound to this service, frequent location updates are permitted. When the activity is removed
+ * from the foreground, the service promotes itself to a foreground service, and location updates
+ * continue. When the activity comes back to the foreground, the foreground service stops, and the
+ * notification assocaited with that service is removed.
+ */
+public class LocationUpdatesService extends Service {
+
+    private static final String PACKAGE_NAME =
+            "com.google.android.gms.location.sample.locationupdatesforegroundservice";
+
+    private static final String TAG = LocationUpdatesService.class.getSimpleName();
+
+    /**
+     * The name of the channel for notifications.
+     */
+    private static final String CHANNEL_ID = "channel_01";
+
+    static final String ACTION_BROADCAST = PACKAGE_NAME + ".broadcast";
+
+    static final String EXTRA_LOCATION = PACKAGE_NAME + ".location";
+    private static final String EXTRA_STARTED_FROM_NOTIFICATION = PACKAGE_NAME +
+            ".started_from_notification";
+
+    private final IBinder mBinder = new LocalBinder();
+
+    /**
+     * The desired interval for location updates. Inexact. Updates may be more or less frequent.
+     */
+    private static final long UPDATE_INTERVAL_IN_MILLISECONDS = 10000;
+
+    /**
+     * The fastest rate for active location updates. Updates will never be more frequent
+     * than this value.
+     */
+    private static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
+            UPDATE_INTERVAL_IN_MILLISECONDS / 2;
+
+    /**
+     * The identifier for the notification displayed for the foreground service.
+     */
+    private static final int NOTIFICATION_ID = 954311;
+
+    /**
+     * Used to check whether the bound activity has really gone away and not unbound as part of an
+     * orientation change. We create a foreground service notification only if the former takes
+     * place.
+     */
+    private boolean mChangingConfiguration = false;
+
+    private NotificationManager mNotificationManager;
+
+    private LocationRequest mLocationRequest;
+
+    /**
+     * Provides access to the Fused Location Provider API.
+     */
+    private FusedLocationProviderClient mFusedLocationClient;
+
+    /**
+     * Callback for changes in location.
+     */
+    private LocationCallback mLocationCallback;
+
+    private Handler mServiceHandler;
+
+    /**
+     * The current location.
+     */
+    private Location mLocation;
+
+    public LocationUpdatesService() {
+    }
+
+    @Override
+    public void onCreate() {
+        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
+
+        mLocationCallback = new LocationCallback() {
+            @Override
+            public void onLocationResult(LocationResult locationResult) {
+                super.onLocationResult(locationResult);
+                onNewLocation(locationResult.getLastLocation());
+            }
+        };
+
+        createLocationRequest();
+        getLastLocation();
+
+        HandlerThread handlerThread = new HandlerThread(TAG);
+        handlerThread.start();
+        mServiceHandler = new Handler(handlerThread.getLooper());
+        mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+
+        // Android O requires a Notification Channel.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            CharSequence name = "Location service";
+            // Create the channel for the notification
+            NotificationChannel mChannel =
+                    new NotificationChannel(CHANNEL_ID, name, NotificationManager.IMPORTANCE_DEFAULT);
+
+            // Set the Notification Channel for the Notification Manager.
+            mNotificationManager.createNotificationChannel(mChannel);
+        }
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Log.i(TAG, "Service started");
+        boolean startedFromNotification = intent.getBooleanExtra(EXTRA_STARTED_FROM_NOTIFICATION,
+                false);
+
+        // We got here because the user decided to remove location updates from the notification.
+        if (startedFromNotification) {
+            removeLocationUpdates();
+            stopSelf();
+        }
+        // Tells the system to not try to recreate the service after it has been killed.
+        return START_NOT_STICKY;
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        mChangingConfiguration = true;
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        // Called when a client (MainActivity in case of this sample) comes to the foreground
+        // and binds with this service. The service should cease to be a foreground service
+        // when that happens.
+        Log.i(TAG, "in onBind()");
+        stopForeground(true);
+        mChangingConfiguration = false;
+        return mBinder;
+    }
+
+    @Override
+    public void onRebind(Intent intent) {
+        // Called when a client (MainActivity in case of this sample) returns to the foreground
+        // and binds once again with this service. The service should cease to be a foreground
+        // service when that happens.
+        Log.i(TAG, "in onRebind()");
+        stopForeground(true);
+        mChangingConfiguration = false;
+        super.onRebind(intent);
+    }
+
+    @Override
+    public boolean onUnbind(Intent intent) {
+        Log.i(TAG, "Last client unbound from service");
+
+        // Called when the last client (MainActivity in case of this sample) unbinds from this
+        // service. If this method is called due to a configuration change in MainActivity, we
+        // do nothing. Otherwise, we make this service a foreground service.
+        if (!mChangingConfiguration && Utils.requestingLocationUpdates(this)) {
+            Log.i(TAG, "Starting foreground service");
+            /*
+            // TODO(developer). If targeting O, use the following code.
+            if (Build.VERSION.SDK_INT == Build.VERSION_CODES.O) {
+                mNotificationManager.startServiceInForeground(new Intent(this,
+                        LocationUpdatesService.class), NOTIFICATION_ID, getNotification());
+            } else {
+                startForeground(NOTIFICATION_ID, getNotification());
+            }
+             */
+            startForeground(NOTIFICATION_ID, getNotification());
+        }
+        return true; // Ensures onRebind() is called when a client re-binds.
+    }
+
+    @Override
+    public void onDestroy() {
+        mServiceHandler.removeCallbacksAndMessages(null);
+    }
+
+    /**
+     * Makes a request for location updates. Note that in this sample we merely log the
+     * {@link SecurityException}.
+     */
+    public void requestLocationUpdates() {
+        Log.i(TAG, "Requesting location updates");
+        Utils.setRequestingLocationUpdates(this, true);
+        startService(new Intent(getApplicationContext(), LocationUpdatesService.class));
+        try {
+            mFusedLocationClient.requestLocationUpdates(mLocationRequest,
+                    mLocationCallback, Looper.myLooper());
+        } catch (SecurityException unlikely) {
+            Utils.setRequestingLocationUpdates(this, false);
+            Log.e(TAG, "Lost location permission. Could not request updates. " + unlikely);
+        }
+    }
+
+    /**
+     * Removes location updates. Note that in this sample we merely log the
+     * {@link SecurityException}.
+     */
+    public void removeLocationUpdates() {
+        Log.i(TAG, "Removing location updates");
+        try {
+            mFusedLocationClient.removeLocationUpdates(mLocationCallback);
+            Utils.setRequestingLocationUpdates(this, false);
+            stopSelf();
+        } catch (SecurityException unlikely) {
+            Utils.setRequestingLocationUpdates(this, true);
+            Log.e(TAG, "Lost location permission. Could not remove updates. " + unlikely);
+        }
+    }
+
+    /**
+     * Returns the {@link NotificationCompat} used as part of the foreground service.
+     */
+    private Notification getNotification() {
+        Intent intent = new Intent(this, LocationUpdatesService.class);
+
+        CharSequence text = Utils.getLocationText(mLocation);
+
+        // Extra to help us figure out if we arrived in onStartCommand via the notification or not.
+        intent.putExtra(EXTRA_STARTED_FROM_NOTIFICATION, true);
+
+        // The PendingIntent that leads to a call to onStartCommand() in this service.
+        PendingIntent servicePendingIntent = PendingIntent.getService(this, 0, intent,
+                PendingIntent.FLAG_UPDATE_CURRENT);
+
+        // The PendingIntent to launch activity.
+        PendingIntent activityPendingIntent = PendingIntent.getActivity(this, 0,
+                new Intent(this, MainActivity.class), 0);
+
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
+                .addAction(R.drawable.blank_icon, "Open HA Client",
+                        activityPendingIntent)
+                .addAction(R.drawable.blank_icon, "Stop",
+                        servicePendingIntent)
+                .setContentText(text)
+                .setContentTitle(Utils.getLocationTitle(this))
+                .setOngoing(true)
+                .setPriority(Notification.PRIORITY_HIGH)
+                .setSmallIcon(R.mipmap.ic_launcher)
+                .setTicker(text)
+                .setWhen(System.currentTimeMillis());
+
+        return builder.build();
+    }
+
+    private void getLastLocation() {
+        try {
+            mFusedLocationClient.getLastLocation()
+                    .addOnCompleteListener(new OnCompleteListener<Location>() {
+                        @Override
+                        public void onComplete(@NonNull Task<Location> task) {
+                            if (task.isSuccessful() && task.getResult() != null) {
+                                mLocation = task.getResult();
+                            } else {
+                                Log.w(TAG, "Failed to get location.");
+                            }
+                        }
+                    });
+        } catch (SecurityException unlikely) {
+            Log.e(TAG, "Lost location permission." + unlikely);
+        }
+    }
+
+    private void onNewLocation(Location location) {
+        Log.i(TAG, "New location: " + location);
+
+        mLocation = location;
+
+        // Notify anyone listening for broadcasts about the new location.
+        Intent intent = new Intent(ACTION_BROADCAST);
+        intent.putExtra(EXTRA_LOCATION, location);
+        LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(intent);
+
+        // Update notification content if running as a foreground service.
+        if (serviceIsRunningInForeground(this)) {
+            mNotificationManager.notify(NOTIFICATION_ID, getNotification());
+        }
+    }
+
+    /**
+     * Sets the location request parameters.
+     */
+    private void createLocationRequest() {
+        mLocationRequest = new LocationRequest();
+        mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
+        mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
+        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
+    }
+
+    /**
+     * Class used for the client Binder.  Since this service runs in the same process as its
+     * clients, we don't need to deal with IPC.
+     */
+    public class LocalBinder extends Binder {
+        LocationUpdatesService getService() {
+            return LocationUpdatesService.this;
+        }
+    }
+
+    /**
+     * Returns true if this is a foreground service.
+     *
+     * @param context The {@link Context}.
+     */
+    public boolean serviceIsRunningInForeground(Context context) {
+        ActivityManager manager = (ActivityManager) context.getSystemService(
+                Context.ACTIVITY_SERVICE);
+        for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(
+                Integer.MAX_VALUE)) {
+            if (getClass().getName().equals(service.service.getClassName())) {
+                if (service.foreground) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+}

android/app/src/main/java/com/keyboardcrumbs/hassclient/MainActivity.java

@@ -1,15 +1,30 @@
 package com.keyboardcrumbs.hassclient;
 
 import androidx.annotation.NonNull;
+import androidx.core.app.ActivityCompat;
+import androidx.localbroadcastmanager.content.LocalBroadcastManager;
+
 import io.flutter.embedding.android.FlutterActivity;
 import io.flutter.embedding.engine.FlutterEngine;
 import io.flutter.plugins.GeneratedPluginRegistrant;
 
+import android.Manifest;
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
 import android.content.Context;
 
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
+import android.content.pm.PackageManager;
+import android.location.Location;
 import android.os.Bundle;
+import android.os.IBinder;
+import android.preference.PreferenceManager;
+import android.util.Log;
+import android.widget.Toast;
 
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
@@ -24,8 +39,39 @@ import com.google.firebase.messaging.FirebaseMessaging;
 
 public class MainActivity extends FlutterActivity {
 
+    private static final String TAG = MainActivity.class.getSimpleName();
+
     private static final String CHANNEL = "com.keyboardcrumbs.hassclient/native";
 
+    // Used in checking for runtime permissions.
+    private static final int REQUEST_PERMISSIONS_REQUEST_CODE = 34;
+
+    // The BroadcastReceiver used to listen from broadcasts from the service.
+    private MyReceiver myReceiver;
+
+    // A reference to the service used to get location updates.
+    private LocationUpdatesService mService = null;
+
+    // Tracks the bound state of the service.
+    private boolean mBound = false;
+
+    // Monitors the state of the connection to the service.
+    private final ServiceConnection mServiceConnection = new ServiceConnection() {
+
+        @Override
+        public void onServiceConnected(ComponentName name, IBinder service) {
+            LocationUpdatesService.LocalBinder binder = (LocationUpdatesService.LocalBinder) service;
+            mService = binder.getService();
+            mBound = true;
+        }
+
+        @Override
+        public void onServiceDisconnected(ComponentName name) {
+            mService = null;
+            mBound = false;
+        }
+    };
+
     @Override
     public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
         GeneratedPluginRegistrant.registerWith(flutterEngine);
@@ -53,6 +99,16 @@ public class MainActivity extends FlutterActivity {
                         } else {
                             result.error("google_play_service_error", "Google Play Services unavailable", null);
                         }
+                    } else if (call.method.equals("startLocationService")) {
+                        if (!checkPermissions()) {
+                            requestPermissions();
+                        } else {
+                            mService.requestLocationUpdates();
+                        }
+                        result.success("");
+                    } else if (call.method.equals("stopLocationService")) {
+                        mService.removeLocationUpdates();
+                        result.success("");
                     }
                 }
             }
@@ -66,6 +122,148 @@ public class MainActivity extends FlutterActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        myReceiver = new MyReceiver();
+        // Check that the user hasn't revoked permissions by going to Settings.
+        if (Utils.requestingLocationUpdates(this)) {
+            if (!checkPermissions()) {
+                requestPermissions();
+            }
+        }
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        // Bind to the service. If the service is in foreground mode, this signals to the service
+        // that since this activity is in the foreground, the service can exit foreground mode.
+        bindService(new Intent(this, LocationUpdatesService.class), mServiceConnection,
+                Context.BIND_AUTO_CREATE);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        LocalBroadcastManager.getInstance(this).registerReceiver(myReceiver,
+                new IntentFilter(LocationUpdatesService.ACTION_BROADCAST));
+    }
+
+    @Override
+    protected void onPause() {
+        LocalBroadcastManager.getInstance(this).unregisterReceiver(myReceiver);
+        super.onPause();
+    }
+
+    @Override
+    protected void onStop() {
+        if (mBound) {
+            // Unbind from the service. This signals to the service that this activity is no longer
+            // in the foreground, and the service can respond by promoting itself to a foreground
+            // service.
+            unbindService(mServiceConnection);
+            mBound = false;
+        }
+        super.onStop();
+    }
+
+    /**
+     * Returns the current state of the permissions needed.
+     */
+    private boolean checkPermissions() {
+        return  PackageManager.PERMISSION_GRANTED == ActivityCompat.checkSelfPermission(this,
+                Manifest.permission.ACCESS_FINE_LOCATION);
+    }
+
+    private void requestPermissions() {
+        boolean shouldProvideRationale =
+                ActivityCompat.shouldShowRequestPermissionRationale(this,
+                        Manifest.permission.ACCESS_FINE_LOCATION);
+
+        // Provide an additional rationale to the user. This would happen if the user denied the
+        // request previously, but didn't check the "Don't ask again" checkbox.
+        if (shouldProvideRationale) {
+            Log.i(TAG, "Displaying permission rationale to provide additional context.");
+            /*
+            Snackbar.make(
+                    findViewById(R.id.activity_main),
+                    R.string.permission_rationale,
+                    Snackbar.LENGTH_INDEFINITE)
+                    .setAction(R.string.ok, new View.OnClickListener() {
+                        @Override
+                        public void onClick(View view) {
+                            // Request permission
+                            ActivityCompat.requestPermissions(MainActivity.this,
+                                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
+                                    REQUEST_PERMISSIONS_REQUEST_CODE);
+                        }
+                    })
+                    .show();
+             */
+        } else {
+            Log.i(TAG, "Requesting permission");
+            // Request permission. It's possible this can be auto answered if device policy
+            // sets the permission in a given state or the user denied the permission
+            // previously and checked "Never ask again".
+            ActivityCompat.requestPermissions(MainActivity.this,
+                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
+                    REQUEST_PERMISSIONS_REQUEST_CODE);
+        }
+    }
+
+    /**
+     * Callback received when a permissions request has been completed.
+     */
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
+                                           @NonNull int[] grantResults) {
+        if (requestCode == REQUEST_PERMISSIONS_REQUEST_CODE) {
+            if (grantResults.length <= 0) {
+                // If user interaction was interrupted, the permission request is cancelled and you
+                // receive empty arrays.
+                Log.i(TAG, "User interaction was cancelled.");
+            } else if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                // Permission was granted.
+                mService.requestLocationUpdates();
+            } else {
+                // Permission denied.
+                /*
+                setButtonsState(false);
+                Snackbar.make(
+                        findViewById(R.id.activity_main),
+                        R.string.permission_denied_explanation,
+                        Snackbar.LENGTH_INDEFINITE)
+                        .setAction(R.string.settings, new View.OnClickListener() {
+                            @Override
+                            public void onClick(View view) {
+                                // Build intent that displays the App settings screen.
+                                Intent intent = new Intent();
+                                intent.setAction(
+                                        Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+                                Uri uri = Uri.fromParts("package",
+                                        BuildConfig.APPLICATION_ID, null);
+                                intent.setData(uri);
+                                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                                startActivity(intent);
+                            }
+                        })
+                        .show();
+
+                 */
+            }
+        }
+    }
+
+    /**
+     * Receiver for broadcasts sent by {@link LocationUpdatesService}.
+     */
+    private class MyReceiver extends BroadcastReceiver {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            Location location = intent.getParcelableExtra(LocationUpdatesService.EXTRA_LOCATION);
+            if (location != null) {
+                Toast.makeText(MainActivity.this, Utils.getLocationText(location),
+                        Toast.LENGTH_SHORT).show();
+            }
+        }
     }
 
 }

android/app/src/main/java/com/keyboardcrumbs/hassclient/Utils.java

@@ -0,0 +1,46 @@
+package com.keyboardcrumbs.hassclient;
+
+import android.content.Context;
+import android.location.Location;
+import android.preference.PreferenceManager;
+
+import java.text.DateFormat;
+import java.util.Date;
+
+class Utils {
+
+    static final String KEY_REQUESTING_LOCATION_UPDATES = "flutter.foreground-location-service";
+
+    /**
+     * Returns true if requesting location updates, otherwise returns false.
+     *
+     * @param context The {@link Context}.
+     */
+    static boolean requestingLocationUpdates(Context context) {
+        return context.getSharedPreferences("FlutterSharedPreferences", Context.MODE_PRIVATE).getBoolean(KEY_REQUESTING_LOCATION_UPDATES, false);
+    }
+
+    /**
+     * Stores the location updates state in SharedPreferences.
+     * @param requestingLocationUpdates The location updates state.
+     */
+    static void setRequestingLocationUpdates(Context context, boolean requestingLocationUpdates) {
+        context.getSharedPreferences("FlutterSharedPreferences", Context.MODE_PRIVATE)
+                .edit()
+                .putBoolean(KEY_REQUESTING_LOCATION_UPDATES, requestingLocationUpdates)
+                .apply();
+    }
+
+    /**
+     * Returns the {@code location} object as a human readable string.
+     * @param location  The {@link Location}.
+     */
+    static String getLocationText(Location location) {
+        return location == null ? "Unknown location" :
+                "(" + location.getLatitude() + ", " + location.getLongitude() + ")";
+    }
+
+    static String getLocationTitle(Context context) {
+        return "Location updated: " + DateFormat.getDateTimeInstance().format(new Date());
+    }
+}

lib/pages/settings/integration_settings.part.dart

@@ -11,8 +11,11 @@ class IntegrationSettingsPage extends StatefulWidget {
 
 class _IntegrationSettingsPageState extends State<IntegrationSettingsPage> {
 
+  static const platform = const MethodChannel('com.keyboardcrumbs.hassclient/native');
+
   int _locationInterval = AppSettings().defaultLocationUpdateIntervalMinutes;
   bool _locationTrackingEnabled = false;
+  bool _foregroundLocationTrackingEnabled = false;
   bool _wait = false;
 
   @override
@@ -28,6 +31,7 @@ class _IntegrationSettingsPageState extends State<IntegrationSettingsPage> {
     SharedPreferences.getInstance().then((prefs) {
       setState(() {
         _locationTrackingEnabled = prefs.getBool("location-enabled") ?? false;
+        _foregroundLocationTrackingEnabled = prefs.getBool("foreground-location-service") ?? false;
         _locationInterval = prefs.getInt("location-interval") ??
           AppSettings().defaultLocationUpdateIntervalMinutes;
         if (_locationInterval % 5 != 0) {
@@ -63,6 +67,17 @@ class _IntegrationSettingsPageState extends State<IntegrationSettingsPage> {
     });
   }
 
+  _switchForegroundLocationTrackingState(bool state) async {
+    if (state) {
+      await platform.invokeMethod('startLocationService');
+    } else {
+      await platform.invokeMethod('stopLocationService');
+    }
+    setState(() {
+      _wait = false;
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     return ListView(
@@ -84,7 +99,7 @@ class _IntegrationSettingsPageState extends State<IntegrationSettingsPage> {
               Container(height: Sizes.rowPadding,),
               Row(
                 children: <Widget>[
-                  Text("Enable device location tracking"),
+                  Text("Enable location tracking"),
                   Switch(
                     value: _locationTrackingEnabled,
                     onChanged: _wait ? null : (value) {
@@ -97,7 +112,23 @@ class _IntegrationSettingsPageState extends State<IntegrationSettingsPage> {
                   ),
                 ],
               ),
-              Container(height: Sizes.rowPadding,),
+              Container(height: Sizes.rowPadding),
+              Row(
+                children: <Widget>[
+                  Text("Foreground tracking"),
+                  Switch(
+                    value: _foregroundLocationTrackingEnabled,
+                    onChanged: _wait ? null : (value) {
+                      setState(() {
+                        _foregroundLocationTrackingEnabled = value;
+                        _wait = true;
+                      });
+                      _switchForegroundLocationTrackingState(value);
+                    },
+                  ),
+                ],
+              ),
+              Container(height: Sizes.rowPadding),
               Text("Location update interval in minutes:"),
               Row(
                 mainAxisAlignment: MainAxisAlignment.center,