NearestFavoriteStationWidgetService: Run appwidget update in foreground.

oeffi/AndroidManifest.xml

@@ -33,6 +33,7 @@
     <uses-permission android:name="android.permission.READ_CONTACTS" />
     <uses-permission android:name="android.permission.READ_CALENDAR" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
 
     <uses-feature

oeffi/build.gradle

@@ -14,6 +14,7 @@ dependencies {
     compile 'androidx.annotation:annotation:1.0.0'
     compile 'androidx.recyclerview:recyclerview:1.0.0'
     compile 'androidx.drawerlayout:drawerlayout:1.0.0'
+    compile 'androidx.core:core:1.0.0'
     compile 'com.squareup.okhttp3:okhttp:3.12.0'
     compile 'com.squareup.okhttp3:logging-interceptor:3.12.0'
     compile 'com.google.guava:guava:27.0.1-android'

oeffi/res/drawable-anydpi/ic_stat_notify_sync_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M12,4L12,1L8,5l4,4L12,6c3.31,0 6,2.69 6,6 0,1.01 -0.25,1.97 -0.7,2.8l1.46,1.46C19.54,15.03 20,13.57 20,12c0,-4.42 -3.58,-8 -8,-8zM12,18c-3.31,0 -6,-2.69 -6,-6 0,-1.01 0.25,-1.97 0.7,-2.8L5.24,7.74C4.46,8.97 4,10.43 4,12c0,4.42 3.58,8 8,8v3l4,-4 -4,-4v3z"/>
+</vector>

oeffi/res/values-de/strings.xml

@@ -334,6 +334,7 @@
     <string name="alert_crash_report_update">Google Play</string>
     <string name="alert_crash_report_download">Herunterladen</string>
     <string name="alert_crash_report_negative">Schließen</string>
+    <string name="notification_channel_appwidget_name">App-Widget-Aktivität</string>
 
     <!-- products -->
     <string name="product_i">Fernverkehr</string>

oeffi/res/values/strings.xml

@@ -335,6 +335,7 @@
     <string name="alert_crash_report_update">Google Play</string>
     <string name="alert_crash_report_download">Download</string>
     <string name="alert_crash_report_negative">Dismiss</string>
+    <string name="notification_channel_appwidget_name">App-widget activity</string>
 
     <!-- products -->
     <string name="product_i">Highspeed</string>

oeffi/src/de/schildbach/oeffi/Application.java

@@ -30,13 +30,18 @@ import com.google.common.base.Stopwatch;
 
 import de.schildbach.oeffi.directions.QueryHistoryProvider;
 import de.schildbach.oeffi.stations.FavoriteStationsProvider;
+import de.schildbach.oeffi.stations.NearestFavoriteStationWidgetService;
 import de.schildbach.oeffi.util.Downloader;
 import de.schildbach.oeffi.util.ErrorReporter;
 import de.schildbach.pte.NetworkId;
 
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.os.Build;
 import android.preference.PreferenceManager;
 import ch.qos.logback.classic.Level;
 import ch.qos.logback.classic.LoggerContext;
@@ -147,6 +152,8 @@ public class Application extends android.app.Application {
         QueryHistoryProvider.migrateQueryHistory(this, VAGFR, NetworkId.NVBW);
 
         log.info("Migrations took {}", watch);
+
+        initNotificationManager();
     }
 
     private void initLogging() {
@@ -202,6 +209,20 @@ public class Application extends android.app.Application {
         config.setUserAgentValue(getPackageName());
     }
 
+    private void initNotificationManager() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            final Stopwatch watch = Stopwatch.createStarted();
+            final NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+
+            final NotificationChannel appwidget = new NotificationChannel(
+                    NearestFavoriteStationWidgetService.NOTIFICATION_CHANNEL_ID_APPWIDGET,
+                    getString(R.string.notification_channel_appwidget_name), NotificationManager.IMPORTANCE_LOW);
+            nm.createNotificationChannel(appwidget);
+
+            log.info("created notification channels, took {}", watch);
+        }
+    }
+
     private void migrateSelectedNetwork(final String fromName, final NetworkId to) {
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
 

oeffi/src/de/schildbach/oeffi/stations/NearestFavoriteStationWidgetService.java

@@ -62,6 +62,7 @@ import android.location.LocationListener;
 import android.location.LocationManager;
 import android.location.LocationProvider;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.HandlerThread;
@@ -70,6 +71,7 @@ import android.text.format.DateFormat;
 import android.view.View;
 import android.widget.RemoteViews;
 import androidx.core.app.JobIntentService;
+import androidx.core.app.NotificationCompat;
 import androidx.core.content.ContextCompat;
 
 public class NearestFavoriteStationWidgetService extends JobIntentService {
@@ -80,6 +82,8 @@ public class NearestFavoriteStationWidgetService extends JobIntentService {
     private Handler backgroundHandler;
 
     private static final int JOB_ID = 1;
+    public static final String NOTIFICATION_CHANNEL_ID_APPWIDGET = "appwidget";
+    private static final int NOTIFICATION_ID_APPWIDGET_UPDATE = 1;
 
     private static final Logger log = LoggerFactory.getLogger(NearestFavoriteStationWidgetService.class);
 
@@ -110,6 +114,22 @@ public class NearestFavoriteStationWidgetService extends JobIntentService {
 
     @Override
     protected void onHandleWork(final Intent intent) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            final NotificationCompat.Builder notification = new NotificationCompat.Builder(this,
+                    NOTIFICATION_CHANNEL_ID_APPWIDGET);
+            notification.setSmallIcon(R.drawable.ic_stat_notify_sync_24dp);
+            notification.setWhen(System.currentTimeMillis());
+            notification.setOngoing(true);
+            startForeground(NOTIFICATION_ID_APPWIDGET_UPDATE, notification.build());
+        }
+
+        handleIntent();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
+            stopForeground(true);
+    }
+
+    private void handleIntent() {
         final ComponentName providerName = new ComponentName(this, NearestFavoriteStationWidgetProvider.class);
         final int[] appWidgetIds = appWidgetManager.getAppWidgetIds(providerName);