diff --git a/app/build.gradle b/app/build.gradle
index 34253baa1..5184567f9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -105,6 +105,7 @@ dependencies {
     implementation "androidx.room:room-runtime:$room_version"
     implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.5.0'
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
+    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.0'
     implementation 'android.arch.lifecycle:reactivestreams:1.1.1'
     implementation 'android.arch.work:work-runtime-ktx:1.0.1'
     implementation 'androidx.appcompat:appcompat:1.4.2'
@@ -136,11 +137,11 @@ dependencies {
 
     // Kotlin
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
-    implementation "org.jetbrains.anko:anko:0.10.8"
     implementation 'androidx.core:core-ktx:1.8.0'
     implementation 'androidx.fragment:fragment-ktx:1.4.1'
     // Note: fix for internal androidx libraries using outdated WorkManager causing a crash
     implementation "androidx.work:work-runtime-ktx:2.7.1"
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.1'
 
     // RxJava
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/api/tumonline/interceptors/AddTokenInterceptor.kt b/app/src/main/java/de/tum/in/tumcampusapp/api/tumonline/interceptors/AddTokenInterceptor.kt
index cb8fb60db..6da50ef30 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/api/tumonline/interceptors/AddTokenInterceptor.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/api/tumonline/interceptors/AddTokenInterceptor.kt
@@ -1,7 +1,7 @@
 package de.tum.`in`.tumcampusapp.api.tumonline.interceptors
 
 import android.content.Context
-import android.preference.PreferenceManager
+import androidx.preference.PreferenceManager
 import de.tum.`in`.tumcampusapp.utils.Const
 import okhttp3.Interceptor
 import okhttp3.Response
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationScheduler.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationScheduler.kt
index 5ff3a8c12..85e853ee5 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationScheduler.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationScheduler.kt
@@ -4,6 +4,7 @@ import android.app.AlarmManager
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
+import androidx.core.app.NotificationManagerCompat
 import de.tum.`in`.tumcampusapp.component.notifications.model.AppNotification
 import de.tum.`in`.tumcampusapp.component.notifications.model.FutureNotification
 import de.tum.`in`.tumcampusapp.component.notifications.model.InstantNotification
@@ -14,8 +15,6 @@ import de.tum.`in`.tumcampusapp.component.notifications.receivers.NotificationAl
 import de.tum.`in`.tumcampusapp.component.notifications.receivers.NotificationReceiver
 import de.tum.`in`.tumcampusapp.database.TcaDb
 import de.tum.`in`.tumcampusapp.utils.Const
-import org.jetbrains.anko.alarmManager
-import org.jetbrains.anko.notificationManager
 import org.joda.time.DateTime
 import javax.inject.Inject
 
@@ -28,7 +27,7 @@ import javax.inject.Inject
  */
 class NotificationScheduler @Inject constructor(private val context: Context) {
 
-    private val notificationManager = context.notificationManager
+    private val notificationManager = NotificationManagerCompat.from(context)
 
     /**
      * Schedules a list of [FutureNotification]s for the time specified by each notification.
@@ -89,7 +88,8 @@ class NotificationScheduler @Inject constructor(private val context: Context) {
     fun cancel(globalId: Long, notification: FutureNotification) {
         val pendingIntent = getAlarmIntent(notification, globalId)
         pendingIntent.cancel()
-        context.alarmManager.cancel(pendingIntent)
+        val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
+        alarmManager.cancel(pendingIntent)
     }
 
     /**
@@ -117,7 +117,7 @@ class NotificationScheduler @Inject constructor(private val context: Context) {
      */
     fun scheduleAlarm(type: NotificationType, time: DateTime) {
         val alarmIntent = getAlarmIntent(type)
-        val alarmManager = context.alarmManager
+        val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
 
         // If the same alarm has already been scheduled, we cancel it.
         alarmIntent.cancel()
@@ -134,7 +134,7 @@ class NotificationScheduler @Inject constructor(private val context: Context) {
      */
     private fun scheduleAlarm(notification: FutureNotification, globalId: Long) {
         val alarmIntent = getAlarmIntent(notification, globalId)
-        val alarmManager = context.alarmManager
+        val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
         alarmManager.setExact(AlarmManager.RTC_WAKEUP, notification.time.millis, alarmIntent)
         addActiveAlarm(context, globalId)
     }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationUtils.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationUtils.kt
index 10b802c2a..4cc546e70 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationUtils.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/NotificationUtils.kt
@@ -6,9 +6,9 @@ import android.app.NotificationManager
 import android.content.Context
 import android.graphics.Color
 import android.os.Build
+import androidx.core.app.NotificationManagerCompat
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.utils.Const
-import org.jetbrains.anko.notificationManager
 
 object NotificationUtils {
 
@@ -92,7 +92,7 @@ object NotificationUtils {
             lightColor = Color.RED
         }
 
-        val notificationManager = context.notificationManager
+        val notificationManager = NotificationManagerCompat.from(context)
         val channels = listOf(default, chat, eduroam, cafeteria, mvv, emergency)
 
         channels.forEach { notificationManager.createNotificationChannel(it) }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/receivers/NotificationAlarmReceiver.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/receivers/NotificationAlarmReceiver.kt
index c58450dbf..009045e2e 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/receivers/NotificationAlarmReceiver.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/notifications/receivers/NotificationAlarmReceiver.kt
@@ -3,13 +3,17 @@ package de.tum.`in`.tumcampusapp.component.notifications.receivers
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.OutOfQuotaPolicy
+import androidx.work.WorkManager
+import androidx.work.Worker
+import androidx.work.WorkerParameters
 import de.tum.`in`.tumcampusapp.component.notifications.NotificationScheduler
 import de.tum.`in`.tumcampusapp.component.notifications.persistence.NotificationType
 import de.tum.`in`.tumcampusapp.component.tumui.tutionfees.TuitionFeesNotificationProvider
 import de.tum.`in`.tumcampusapp.component.ui.cafeteria.CafeteriaNotificationProvider
 import de.tum.`in`.tumcampusapp.component.ui.transportation.TransportNotificationProvider
 import de.tum.`in`.tumcampusapp.utils.Const
-import org.jetbrains.anko.doAsync
 
 class NotificationAlarmReceiver : BroadcastReceiver() {
 
@@ -23,11 +27,22 @@ class NotificationAlarmReceiver : BroadcastReceiver() {
             else -> return
         }
 
-        doAsync {
-            val notification = notificationProvider.buildNotification()
-            notification?.let {
-                NotificationScheduler(context).schedule(it)
+        // create subclass of Worker to enqueue with WorkManager
+        class WorkWhenReceived(appContext: Context, workerParams: WorkerParameters) :
+            Worker(appContext, workerParams) {
+            override fun doWork(): Result {
+                val notification = notificationProvider.buildNotification()
+                notification?.let {
+                    NotificationScheduler(applicationContext).schedule(it)
+                }
+                return Result.success()
             }
         }
+        // start expedited background work
+        val request = OneTimeWorkRequestBuilder<WorkWhenReceived>()
+            .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+            .build()
+        WorkManager.getInstance(context)
+            .enqueue(request)
     }
 }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/BaseNavigationActivity.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/BaseNavigationActivity.kt
index 803bb0815..a3d48e3da 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/BaseNavigationActivity.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/BaseNavigationActivity.kt
@@ -12,6 +12,7 @@ import androidx.drawerlayout.widget.DrawerLayout.LOCK_MODE_LOCKED_CLOSED
 import androidx.drawerlayout.widget.DrawerLayout.LOCK_MODE_UNLOCKED
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
+import androidx.preference.PreferenceManager
 import com.google.android.material.navigation.NavigationView
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.other.generic.drawer.DrawerHeaderInflater
@@ -22,7 +23,6 @@ import de.tum.`in`.tumcampusapp.component.ui.overview.CardManager
 import de.tum.`in`.tumcampusapp.component.ui.overview.MainFragment
 import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.closeDrawers
-import org.jetbrains.anko.defaultSharedPreferences
 
 class BaseNavigationActivity :
     BaseActivity(
@@ -60,7 +60,8 @@ class BaseNavigationActivity :
 
         initDrawer()
         supportFragmentManager.registerFragmentLifecycleCallbacks(fragmentCallbacks, false)
-        defaultSharedPreferences.registerOnSharedPreferenceChangeListener(this)
+
+        PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(this)
 
         if (savedInstanceState == null) {
             supportFragmentManager
@@ -148,7 +149,7 @@ class BaseNavigationActivity :
     }
 
     override fun onDestroy() {
-        defaultSharedPreferences.unregisterOnSharedPreferenceChangeListener(this)
+        PreferenceManager.getDefaultSharedPreferences(this).unregisterOnSharedPreferenceChangeListener(this)
         super.onDestroy()
     }
 
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/ProgressActivity.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/ProgressActivity.kt
index f5f025d34..8f731f7d3 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/ProgressActivity.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/ProgressActivity.kt
@@ -1,6 +1,8 @@
 package de.tum.`in`.tumcampusapp.component.other.generic.activity
 
+import android.content.Context
 import android.graphics.Color
+import android.net.ConnectivityManager
 import android.net.ConnectivityManager.NetworkCallback
 import android.net.Network
 import android.net.NetworkRequest
@@ -29,7 +31,6 @@ import de.tum.`in`.tumcampusapp.utils.NetUtils.internetCapability
 import de.tum.`in`.tumcampusapp.utils.Utils
 import de.tum.`in`.tumcampusapp.utils.setImageResourceOrHide
 import de.tum.`in`.tumcampusapp.utils.setTextOrHide
-import org.jetbrains.anko.connectivityManager
 import retrofit2.Call
 import retrofit2.Callback
 import retrofit2.Response
@@ -246,7 +247,8 @@ abstract class ProgressActivity<T>(
             .build()
 
         if (registered.not()) {
-            connectivityManager.registerNetworkCallback(request, networkCallback)
+            (getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager)
+                .registerNetworkCallback(request, networkCallback)
             registered = true
         }
     }
@@ -289,7 +291,8 @@ abstract class ProgressActivity<T>(
      */
     protected fun showLoadingStart() {
         if (registered) {
-            connectivityManager.unregisterNetworkCallback(networkCallback)
+            (getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager)
+                .unregisterNetworkCallback(networkCallback)
             registered = false
         }
 
@@ -344,7 +347,8 @@ abstract class ProgressActivity<T>(
         super.onDestroy()
         apiCall?.cancel()
         if (registered) {
-            connectivityManager.unregisterNetworkCallback(networkCallback)
+            (getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager)
+                .unregisterNetworkCallback(networkCallback)
             registered = false
         }
     }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/BaseFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/BaseFragment.kt
index 37f9300e3..29dc6d4d4 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/BaseFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/BaseFragment.kt
@@ -1,5 +1,6 @@
 package de.tum.`in`.tumcampusapp.component.other.generic.fragment
 
+import android.content.Context
 import android.graphics.Color
 import android.net.ConnectivityManager
 import android.net.Network
@@ -14,6 +15,7 @@ import androidx.annotation.LayoutRes
 import androidx.annotation.StringRes
 import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 import com.google.android.material.snackbar.Snackbar
 import de.tum.`in`.tumcampusapp.R
@@ -33,8 +35,9 @@ import de.tum.`in`.tumcampusapp.utils.NetUtils
 import de.tum.`in`.tumcampusapp.utils.Utils
 import de.tum.`in`.tumcampusapp.utils.setImageResourceOrHide
 import de.tum.`in`.tumcampusapp.utils.setTextOrHide
-import org.jetbrains.anko.connectivityManager
-import org.jetbrains.anko.support.v4.runOnUiThread
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import retrofit2.Call
 import retrofit2.Callback
 import retrofit2.Response
@@ -45,6 +48,8 @@ abstract class BaseFragment<T>(
     @StringRes private val titleResId: Int
 ) : Fragment(), SwipeRefreshLayout.OnRefreshListener {
 
+    private val mainDispatcher: CoroutineDispatcher = Dispatchers.Main
+
     private var apiCall: Call<T>? = null
     private var hadSuccessfulRequest = false
 
@@ -63,7 +68,7 @@ abstract class BaseFragment<T>(
 
     private val networkCallback: ConnectivityManager.NetworkCallback = object : ConnectivityManager.NetworkCallback() {
         override fun onAvailable(network: Network) {
-            runOnUiThread {
+            this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
                 this@BaseFragment.onRefresh()
             }
         }
@@ -187,7 +192,7 @@ abstract class BaseFragment<T>(
      * @param messageResId Resource id of the error text
      */
     protected fun showError(messageResId: Int) {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             showError(UnknownErrorViewState(messageResId))
         }
     }
@@ -207,7 +212,7 @@ abstract class BaseFragment<T>(
     }
 
     protected fun showErrorSnackbar(messageResId: Int) {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             Snackbar.make(contentView, messageResId, Snackbar.LENGTH_LONG)
                 .setAction(R.string.retry) { retryRequest() }
                 .setActionTextColor(Color.WHITE)
@@ -228,13 +233,13 @@ abstract class BaseFragment<T>(
     }
 
     private fun showFailedTokenLayout(messageResId: Int = R.string.error_accessing_tumonline_body) {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             showError(FailedTokenViewState(messageResId))
         }
     }
 
     protected fun showNoInternetLayout() {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             showError(NoInternetViewState())
         }
 
@@ -243,25 +248,26 @@ abstract class BaseFragment<T>(
             .build()
 
         if (registered.not()) {
-            baseActivity.connectivityManager.registerNetworkCallback(request, networkCallback)
+            (baseActivity.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager)
+                .registerNetworkCallback(request, networkCallback)
             registered = true
         }
     }
 
     protected fun showEmptyResponseLayout(messageResId: Int, iconResId: Int? = null) {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             showError(EmptyViewState(iconResId, messageResId))
         }
     }
 
     protected fun showContentLayout() {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             layoutAllErrorsBinding.layoutError.errorLayout.visibility = View.GONE
         }
     }
 
     protected fun showErrorLayout() {
-        runOnUiThread {
+        this@BaseFragment.lifecycleScope.launch(mainDispatcher) {
             layoutAllErrorsBinding.layoutError.errorLayout.visibility = View.VISIBLE
         }
     }
@@ -313,7 +319,8 @@ abstract class BaseFragment<T>(
      */
     protected fun showLoadingStart() {
         if (registered) {
-            baseActivity.connectivityManager.unregisterNetworkCallback(networkCallback)
+            (baseActivity.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager)
+                .unregisterNetworkCallback(networkCallback)
             registered = false
         }
 
@@ -372,7 +379,8 @@ abstract class BaseFragment<T>(
 
     override fun onDestroy() {
         if (registered) {
-            baseActivity.connectivityManager.unregisterNetworkCallback(networkCallback)
+            (baseActivity.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager)
+                .unregisterNetworkCallback(networkCallback)
             registered = false
         }
         super.onDestroy()
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/FragmentForSearching.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/FragmentForSearching.kt
index ccce49900..e88f512a8 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/FragmentForSearching.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/fragment/FragmentForSearching.kt
@@ -1,6 +1,7 @@
 package de.tum.`in`.tumcampusapp.component.other.generic.fragment
 
 import android.app.SearchManager
+import android.content.Context
 import android.content.SearchRecentSuggestionsProvider.DATABASE_MODE_QUERIES
 import android.database.Cursor
 import android.os.Bundle
@@ -16,7 +17,6 @@ import androidx.appcompat.widget.SearchView
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.other.generic.activity.BaseNavigationActivity
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.searchManager
 
 abstract class FragmentForSearching<T>(
     @LayoutRes layoutId: Int,
@@ -61,7 +61,7 @@ abstract class FragmentForSearching<T>(
         searchItem = checkNotNull(menu.findItem(R.id.action_search))
         searchView = searchItem.actionView as SearchView
 
-        val searchManager = requireContext().searchManager
+        val searchManager = requireContext().getSystemService(Context.SEARCH_SERVICE) as SearchManager
         val info = searchManager.getSearchableInfo(requireActivity().componentName)
         searchView.setSearchableInfo(info)
 
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/other/locations/LocationManager.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/other/locations/LocationManager.kt
index d23aa920c..dbe2f9173 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/other/locations/LocationManager.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/other/locations/LocationManager.kt
@@ -4,8 +4,8 @@ import android.Manifest
 import android.content.Context
 import android.content.pm.PackageManager
 import android.location.Location
-import android.preference.PreferenceManager
 import androidx.core.content.ContextCompat
+import androidx.preference.PreferenceManager
 import com.google.android.gms.common.ConnectionResult
 import com.google.android.gms.common.GoogleApiAvailability
 import de.tum.`in`.tumcampusapp.api.navigatum.NavigaTumAPIClient
@@ -105,7 +105,9 @@ class LocationManager @Inject constructor(c: Context) {
      */
     private fun getLastLocation(): Location? {
         // Check Location permission for Android 6.0
-        if (ContextCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
+        val permCourseLocation = ContextCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION)
+        val permFineLocation = ContextCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION)
+        if (permFineLocation != PackageManager.PERMISSION_GRANTED && permCourseLocation != PackageManager.PERMISSION_GRANTED) {
             return null
         }
 
@@ -247,7 +249,13 @@ class LocationManager @Inject constructor(c: Context) {
     }
 
     companion object {
-        private enum class Campus(val short: String, val lat: Double, val lon: Double, val defaultMensa: String?, val defaultStation: Stations) {
+        private enum class Campus(
+            val short: String,
+            val lat: Double,
+            val lon: Double,
+            val defaultMensa: String?,
+            val defaultStation: Stations
+        ) {
             GarchingForschungszentrum("G", 48.2648424, 11.6709511, "422", Stations.GarchingForschungszentrum),
             GarchingHochbrueck("H", 48.249432, 11.633905, null, Stations.GarchingHochbrueck),
             Weihenstephan("W", 48.397990, 11.722727, "423", Stations.Weihenstephan),
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/other/settings/SettingsFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/other/settings/SettingsFragment.kt
index 0617772ee..d64b6b1e2 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/other/settings/SettingsFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/other/settings/SettingsFragment.kt
@@ -3,6 +3,7 @@ package de.tum.`in`.tumcampusapp.component.other.settings
 import android.Manifest.permission.READ_CALENDAR
 import android.Manifest.permission.WRITE_CALENDAR
 import android.annotation.SuppressLint
+import android.app.NotificationManager
 import android.content.Context
 import android.content.Intent
 import android.content.SharedPreferences
@@ -19,6 +20,7 @@ import androidx.preference.MultiSelectListPreference
 import androidx.preference.Preference
 import androidx.preference.PreferenceCategory
 import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.PreferenceManager
 import androidx.preference.SwitchPreferenceCompat
 import com.squareup.picasso.Picasso
 import de.tum.`in`.tumcampusapp.R
@@ -41,8 +43,6 @@ import io.reactivex.Single
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.schedulers.Schedulers
-import org.jetbrains.anko.defaultSharedPreferences
-import org.jetbrains.anko.notificationManager
 import java.util.concurrent.ExecutionException
 import javax.inject.Inject
 
@@ -114,7 +114,7 @@ class SettingsFragment :
             }
         }
 
-        requireContext().defaultSharedPreferences.registerOnSharedPreferenceChangeListener(this)
+        PreferenceManager.getDefaultSharedPreferences(requireContext()).registerOnSharedPreferenceChangeListener(this)
     }
 
     private fun populateNewsSources() {
@@ -317,10 +317,10 @@ class SettingsFragment :
     @Throws(ExecutionException::class, InterruptedException::class)
     private fun clearData() {
         TcaDb.resetDb(requireContext())
-        requireContext().defaultSharedPreferences.edit().clear().commit()
+        PreferenceManager.getDefaultSharedPreferences(requireContext()).edit().clear().commit()
 
         // Remove all notifications that are currently shown
-        requireContext().notificationManager.cancelAll()
+        (requireContext().getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager).cancelAll()
 
         val readCalendar = checkSelfPermission(requireActivity(), READ_CALENDAR)
         val writeCalendar = checkSelfPermission(requireActivity(), WRITE_CALENDAR)
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CalendarFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CalendarFragment.kt
index 2c709def1..609303c51 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CalendarFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CalendarFragment.kt
@@ -44,7 +44,8 @@ import org.joda.time.DateTime
 import org.joda.time.LocalDate
 import org.joda.time.format.DateTimeFormat
 import java.time.YearMonth
-import java.util.*
+import java.util.Calendar
+import java.util.Locale
 import kotlin.math.abs
 
 class CalendarFragment :
@@ -199,6 +200,7 @@ class CalendarFragment :
     private fun onCalendarImportedIntoDatabase() {
         // Update the action bar to display the enabled menu options
         requireActivity().invalidateOptionsMenu()
+        // enqueues OneTimeWorkRequest
         QueryLocationWorker.enqueueWork(requireContext())
     }
 
@@ -324,29 +326,23 @@ class CalendarFragment :
     }
 
     private fun isPermissionGranted(id: Int): Boolean {
-        if (checkSelfPermission(
-                requireContext(),
-                Manifest.permission.READ_CALENDAR
-            ) == PackageManager.PERMISSION_GRANTED &&
-            checkSelfPermission(
-                    requireContext(),
-                    Manifest.permission.WRITE_CALENDAR
-                ) == PackageManager.PERMISSION_GRANTED
-        ) {
+        val permReadCalendar = checkSelfPermission(requireContext(), Manifest.permission.READ_CALENDAR)
+        val permWriteCalendar = checkSelfPermission(requireContext(), Manifest.permission.WRITE_CALENDAR)
+        if (permReadCalendar == PackageManager.PERMISSION_GRANTED && permWriteCalendar == PackageManager.PERMISSION_GRANTED) {
             return true
+        }
+
+        if (shouldShowRequestPermissionRationale(Manifest.permission.READ_CALENDAR) ||
+            shouldShowRequestPermissionRationale(Manifest.permission.WRITE_CALENDAR)
+        ) {
+            ThemedAlertDialogBuilder(requireContext())
+                .setMessage(getString(R.string.permission_calendar_explanation))
+                .setPositiveButton(R.string.ok) { _, _ ->
+                    showPermissionRequestDialog(id)
+                }
+                .show()
         } else {
-            if (shouldShowRequestPermissionRationale(Manifest.permission.READ_CALENDAR) ||
-                shouldShowRequestPermissionRationale(Manifest.permission.WRITE_CALENDAR)
-            ) {
-                ThemedAlertDialogBuilder(requireContext())
-                    .setMessage(getString(R.string.permission_calendar_explanation))
-                    .setPositiveButton(R.string.ok) { _, _ ->
-                        showPermissionRequestDialog(id)
-                    }
-                    .show()
-            } else {
-                showPermissionRequestDialog(id)
-            }
+            showPermissionRequestDialog(id)
         }
         return false
     }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CreateEventActivity.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CreateEventActivity.kt
index b8af2e85d..25ad6ffe4 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CreateEventActivity.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CreateEventActivity.kt
@@ -15,6 +15,7 @@ import android.view.inputmethod.InputMethodManager
 import android.widget.LinearLayout
 import android.widget.Toast
 import androidx.core.content.ContextCompat
+import androidx.core.widget.doAfterTextChanged
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.api.tumonline.exception.RequestLimitReachedException
 import de.tum.`in`.tumcampusapp.component.other.generic.activity.ActivityForAccessingTumOnline
@@ -30,7 +31,6 @@ import de.tum.`in`.tumcampusapp.utils.ThemedAlertDialogBuilder
 import de.tum.`in`.tumcampusapp.utils.ThemedDatePickerDialog
 import de.tum.`in`.tumcampusapp.utils.ThemedTimePickerDialog
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.sdk27.coroutines.textChangedListener
 import org.joda.time.DateTime
 import org.joda.time.LocalDate
 import org.joda.time.format.DateTimeFormat
@@ -38,7 +38,7 @@ import retrofit2.Call
 import retrofit2.Callback
 import retrofit2.Response
 import java.net.UnknownHostException
-import java.util.*
+import java.util.Locale
 import kotlin.collections.ArrayList
 
 /**
@@ -174,13 +174,11 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
             }
         }
 
-        binding.eventRepeatsTimes.textChangedListener {
-            afterTextChanged {
-                if (it.toString() != "") {
-                    repeatHelper.times = it.toString().toInt()
-                } else {
-                    repeatHelper.times = 0
-                }
+        binding.eventRepeatsTimes.doAfterTextChanged {
+            if (it.toString() != "") {
+                repeatHelper.times = it.toString().toInt()
+            } else {
+                repeatHelper.times = 0
             }
         }
 
@@ -324,17 +322,21 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
         // TIME
         binding.eventStartTimeView.setOnClickListener {
             hideKeyboard()
-            ThemedTimePickerDialog(this, { timePicker, hour, minute ->
-                timePicker.layoutParams = LinearLayout.LayoutParams(
-                    LinearLayout.LayoutParams.WRAP_CONTENT,
-                    LinearLayout.LayoutParams.WRAP_CONTENT
-                )
-                val eventLength = end.millis - start.millis
-                start = start.withHourOfDay(hour)
-                    .withMinuteOfHour(minute)
-                end = end.withMillis(start.millis + eventLength)
-                updateTimeViews()
-            }, start.hourOfDay, start.minuteOfHour).show()
+            ThemedTimePickerDialog(
+                this,
+                { timePicker, hour, minute ->
+                    timePicker.layoutParams = LinearLayout.LayoutParams(
+                        LinearLayout.LayoutParams.WRAP_CONTENT,
+                        LinearLayout.LayoutParams.WRAP_CONTENT
+                    )
+                    val eventLength = end.millis - start.millis
+                    start = start.withHourOfDay(hour).withMinuteOfHour(minute)
+                    end = end.withMillis(start.millis + eventLength)
+                    updateTimeViews()
+                },
+                start.hourOfDay,
+                start.minuteOfHour
+            ).show()
         }
 
         binding.eventEndTimeView.setOnClickListener {
@@ -471,7 +473,19 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
         // event ends after n times
         if (repeatHelper.isRepeatingNTimes()) {
             for (i in 1 until repeatHelper.times) {
-                events.add(CalendarItem("", "", "", baseEvent.title, baseEvent.description, baseEvent.dtstart.plusWeeks(i), baseEvent.dtend.plusWeeks(i), "", false))
+                events.add(
+                    CalendarItem(
+                        "",
+                        "",
+                        "",
+                        baseEvent.title,
+                        baseEvent.description,
+                        baseEvent.dtstart.plusWeeks(i),
+                        baseEvent.dtend.plusWeeks(i),
+                        "",
+                        false
+                    )
+                )
             }
             // event ends after "last" date
         } else {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/MonthViewEventAdapter.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/MonthViewEventAdapter.kt
index 2b41dfefd..b53208533 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/MonthViewEventAdapter.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/MonthViewEventAdapter.kt
@@ -6,7 +6,7 @@ import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.tumui.calendar.model.CalendarItem
-import org.jetbrains.anko.withAlpha
+import de.tum.`in`.tumcampusapp.utils.withAlpha
 import org.joda.time.LocalDate
 
 class MonthViewEventAdapter(private var events: List<CalendarItem>, private var selectedDate: LocalDate) :
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/grades/GradesFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/grades/GradesFragment.kt
index a476adff7..603345d82 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/grades/GradesFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/grades/GradesFragment.kt
@@ -19,6 +19,7 @@ import android.widget.EditText
 import androidx.appcompat.app.AlertDialog
 import androidx.core.content.ContextCompat
 import androidx.core.content.res.ResourcesCompat.getColor
+import androidx.preference.PreferenceManager
 import com.github.mikephil.charting.components.Description
 import com.github.mikephil.charting.components.Legend
 import com.github.mikephil.charting.components.LegendEntry
@@ -48,13 +49,12 @@ import de.tum.`in`.tumcampusapp.component.tumui.grades.model.ExamList
 import de.tum.`in`.tumcampusapp.databinding.FragmentGradesBinding
 import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.support.v4.defaultSharedPreferences
 import org.joda.time.DateTime
 import org.joda.time.format.DateTimeFormat
 import org.joda.time.format.DateTimeFormatter
 import java.lang.reflect.Type
 import java.text.NumberFormat
-import java.util.*
+import java.util.Locale
 import javax.inject.Inject
 
 class GradesFragment : FragmentForAccessingTumOnline<ExamList>(
@@ -272,7 +272,7 @@ class GradesFragment : FragmentForAccessingTumOnline<ExamList>(
     }
 
     private fun storeGradedCourses(exams: List<Exam>) {
-        val gradesStore = GradesStore(defaultSharedPreferences)
+        val gradesStore = GradesStore(PreferenceManager.getDefaultSharedPreferences(activity))
         val courses = exams.map { it.course }
         gradesStore.store(courses)
     }
@@ -520,9 +520,7 @@ class GradesFragment : FragmentForAccessingTumOnline<ExamList>(
         val view = View.inflate(requireContext(), R.layout.dialog_add_grade_input, null)
         val dialog = AlertDialog.Builder(requireContext())
             .setTitle(getString(R.string.add_exam_dialog_title))
-            .setMessage(
-                getString(R.string.add_exam_dialog_message)
-            )
+            .setMessage(getString(R.string.add_exam_dialog_message))
             .setView(view)
             .create()
             .apply {
@@ -706,6 +704,7 @@ class GradesFragment : FragmentForAccessingTumOnline<ExamList>(
         return when (item.itemId) {
             R.id.bar_chart_menu,
             R.id.pie_chart_menu -> toggleChart().run { true }
+
             R.id.edit_grades_menu -> changeEditMode(item).run { true }
             else -> super.onOptionsItemSelected(item)
         }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/roomfinder/NavigationDetailsFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/roomfinder/NavigationDetailsFragment.kt
index 00041f702..25a2947e3 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/roomfinder/NavigationDetailsFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/tumui/roomfinder/NavigationDetailsFragment.kt
@@ -5,6 +5,7 @@ import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.view.View
+import android.widget.AdapterView
 import android.widget.ArrayAdapter
 import androidx.appcompat.app.AlertDialog
 import androidx.core.content.ContextCompat
@@ -24,7 +25,6 @@ import de.tum.`in`.tumcampusapp.databinding.NavigationPropertyRowBinding
 import de.tum.`in`.tumcampusapp.di.ViewModelFactory
 import de.tum.`in`.tumcampusapp.di.injector
 import kotlinx.coroutines.launch
-import org.jetbrains.anko.sdk27.coroutines.onItemSelectedListener
 import javax.inject.Inject
 import javax.inject.Provider
 
@@ -157,14 +157,17 @@ class NavigationDetailsFragment : BaseFragment<Unit>(
             availableMaps.forEach {
                 adapter.add(it.mapName)
             }
-            binding.availableMapSpinner.onItemSelectedListener {
-                this.onItemSelected { adapterView, _, position, _ ->
+            binding.availableMapSpinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
+                override fun onItemSelected(adapterView: AdapterView<*>?, selectedItemView: View?, position: Int, id: Long) {
                     val selectedMapName = adapterView?.getItemAtPosition(position).toString()
                     val selectedMap = availableMaps.find { it.mapName == selectedMapName }
                     selectedMap?.let {
                         loadMapImage(it)
                     }
                 }
+
+                override fun onNothingSelected(p0: AdapterView<*>?) {
+                }
             }
             adapter.notifyDataSetChanged()
         } else {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/CafeteriaNotificationSettings.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/CafeteriaNotificationSettings.kt
index c067e9698..eb3d5d6ce 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/CafeteriaNotificationSettings.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/CafeteriaNotificationSettings.kt
@@ -1,7 +1,7 @@
 package de.tum.`in`.tumcampusapp.component.ui.cafeteria
 
 import android.content.Context
-import android.preference.PreferenceManager
+import androidx.preference.PreferenceManager
 import de.tum.`in`.tumcampusapp.component.ui.cafeteria.controller.CafeteriaMenuManager
 import org.joda.time.DateTime
 import org.joda.time.LocalTime
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/controller/CafeteriaManager.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/controller/CafeteriaManager.kt
index c40cead34..aa6dc3ac0 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/controller/CafeteriaManager.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/controller/CafeteriaManager.kt
@@ -1,7 +1,7 @@
 package de.tum.`in`.tumcampusapp.component.ui.cafeteria.controller
 
 import android.content.Context
-import android.preference.PreferenceManager
+import androidx.preference.PreferenceManager
 import de.tum.`in`.tumcampusapp.api.tumonline.CacheControl
 import de.tum.`in`.tumcampusapp.component.notifications.ProvidesNotifications
 import de.tum.`in`.tumcampusapp.component.other.locations.LocationManager
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamCard.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamCard.kt
index 0c8a763cb..bd5a6bc41 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamCard.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamCard.kt
@@ -18,7 +18,6 @@ import de.tum.`in`.tumcampusapp.component.ui.overview.CardManager
 import de.tum.`in`.tumcampusapp.component.ui.overview.card.Card
 import de.tum.`in`.tumcampusapp.component.ui.overview.card.CardViewHolder
 import de.tum.`in`.tumcampusapp.utils.Const
-import org.jetbrains.anko.wifiManager
 
 /**
  * Card that can start [SetupEduroamActivity]
@@ -37,7 +36,7 @@ class EduroamCard(context: Context) : Card(CardManager.CardTypes.EDUROAM, contex
 
     override fun shouldShow(prefs: SharedPreferences): Boolean {
         // Check if WiFi is turned on at all, as we cannot say if it was configured if it is off
-        val wifiManager = context.wifiManager
+        val wifiManager = context.getSystemService(Context.WIFI_SERVICE) as WifiManager
         return (
             wifiManager.isWifiEnabled &&
                 EduroamController.getEduroamConfig(context) == null &&
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCard.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCard.kt
index 16aeb4a2a..5958c7217 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCard.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCard.kt
@@ -7,6 +7,7 @@ import android.net.wifi.WifiEnterpriseConfig.Eap.PEAP
 import android.net.wifi.WifiEnterpriseConfig.Eap.TTLS
 import android.net.wifi.WifiEnterpriseConfig.Phase2.MSCHAPV2
 import android.net.wifi.WifiEnterpriseConfig.Phase2.PAP
+import android.net.wifi.WifiManager
 import android.os.Build.VERSION.SDK_INT
 import android.os.Build.VERSION_CODES.M
 import android.view.LayoutInflater
@@ -19,8 +20,6 @@ import de.tum.`in`.tumcampusapp.component.ui.overview.card.Card
 import de.tum.`in`.tumcampusapp.component.ui.overview.card.CardViewHolder
 import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.wifiManager
-import java.util.*
 import java.util.regex.Pattern
 
 class EduroamFixCard(
@@ -69,11 +68,8 @@ class EduroamFixCard(
 
     override fun shouldShow(prefs: SharedPreferences): Boolean {
         // Check if wifi is turned on at all, as we cannot say if it was configured if its off
-        return if (context.wifiManager.isWifiEnabled) {
-            !isConfigValid() && prefs.getBoolean("card_eduroam_fix_start", true)
-        } else {
-            false
-        }
+        val wifiEnabled = (context.getSystemService(Context.WIFI_SERVICE) as WifiManager).isWifiEnabled
+        return wifiEnabled && !isConfigValid()
     }
 
     override fun discard(editor: SharedPreferences.Editor) {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCardViewHolder.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCardViewHolder.kt
index c36682eea..cbd39976d 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCardViewHolder.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/eduroam/EduroamFixCardViewHolder.kt
@@ -3,6 +3,7 @@ package de.tum.`in`.tumcampusapp.component.ui.eduroam
 import android.content.Context
 import android.content.Intent
 import android.net.wifi.WifiConfiguration
+import android.net.wifi.WifiManager
 import android.view.View
 import android.widget.TextView
 import com.google.android.material.button.MaterialButton
@@ -10,7 +11,6 @@ import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.ui.overview.CardInteractionListener
 import de.tum.`in`.tumcampusapp.component.ui.overview.card.CardViewHolder
 import de.tum.`in`.tumcampusapp.utils.Const
-import org.jetbrains.anko.wifiManager
 
 class EduroamFixCardViewHolder(
     itemView: View,
@@ -38,7 +38,7 @@ class EduroamFixCardViewHolder(
 
     private fun performEduroamFix(context: Context, eduroam: WifiConfiguration?) {
         eduroam?.let {
-            context.wifiManager.removeNetwork(it.networkId)
+            (context.getSystemService(Context.WIFI_SERVICE) as WifiManager).removeNetwork(it.networkId)
         }
 
         val intent = Intent(context, SetupEduroamActivity::class.java)
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/news/TopNewsCard.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/news/TopNewsCard.kt
index e3dc3991c..3243c7958 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/news/TopNewsCard.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/news/TopNewsCard.kt
@@ -7,6 +7,7 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageView
 import android.widget.ProgressBar
+import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.RecyclerView
 import com.squareup.picasso.Callback
 import com.squareup.picasso.Picasso
@@ -17,7 +18,6 @@ import de.tum.`in`.tumcampusapp.component.ui.overview.CardInteractionListener
 import de.tum.`in`.tumcampusapp.component.ui.overview.CardManager
 import de.tum.`in`.tumcampusapp.component.ui.overview.card.Card
 import de.tum.`in`.tumcampusapp.component.ui.overview.card.CardViewHolder
-import org.jetbrains.anko.defaultSharedPreferences
 
 /**
  * Shows important news
@@ -29,7 +29,7 @@ class TopNewsCard(context: Context) : Card(CardManager.CardTypes.TOP_NEWS, conte
     private val newsAlert: NewsAlert?
 
     init {
-        this.topNewsStore = RealTopNewsStore(context.defaultSharedPreferences)
+        this.topNewsStore = RealTopNewsStore(PreferenceManager.getDefaultSharedPreferences(context))
         this.newsAlert = topNewsStore.getNewsAlert()
     }
 
@@ -59,10 +59,11 @@ class TopNewsCard(context: Context) : Card(CardManager.CardTypes.TOP_NEWS, conte
     }
 
     override fun getNavigationDestination(): NavDestination? {
-        if (newsAlert != null && newsAlert.link.isNotEmpty()) {
-            return NavDestination.Link(newsAlert.link)
+        return if (newsAlert == null || newsAlert.link.isEmpty()) {
+            null
+        } else {
+            NavDestination.Link(newsAlert.link)
         }
-        return null
     }
 
     override fun updateViewHolder(viewHolder: RecyclerView.ViewHolder) {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/CheckTokenFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/CheckTokenFragment.kt
index 6800555d2..b46ef89df 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/CheckTokenFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/CheckTokenFragment.kt
@@ -1,6 +1,9 @@
 package de.tum.`in`.tumcampusapp.component.ui.onboarding
 
+import android.content.ActivityNotFoundException
 import android.content.Context
+import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import android.view.View
 import android.widget.Toast
@@ -20,7 +23,6 @@ import de.tum.`in`.tumcampusapp.utils.plusAssign
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.schedulers.Schedulers
-import org.jetbrains.anko.support.v4.browse
 import java.net.UnknownHostException
 import javax.inject.Inject
 
@@ -60,7 +62,18 @@ class CheckTokenFragment : BaseFragment<Unit>(
         super.onViewCreated(view, savedInstanceState)
         disableRefresh()
         with(binding) {
-            openTumOnlineButton.setOnClickListener { browse(Const.TUM_CAMPUS_URL) }
+            openTumOnlineButton.setOnClickListener {
+                // open url in default browser
+                val browserIntent = Intent(Intent.ACTION_VIEW, Uri.parse(Const.TUM_CAMPUS_URL))
+                try {
+                    startActivity(browserIntent)
+                }
+                // if no browser is installed catch exception and inform user
+                catch (e: ActivityNotFoundException) {
+                    Utils.log(e)
+                    Toast.makeText(requireContext(), R.string.error_opening_url, Toast.LENGTH_LONG).show()
+                }
+            }
             nextButton.setOnClickListener { loadIdentitySet() }
         }
     }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingExtrasFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingExtrasFragment.kt
index b7168023a..63e065c73 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingExtrasFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingExtrasFragment.kt
@@ -1,10 +1,15 @@
 package de.tum.`in`.tumcampusapp.component.ui.onboarding
 
+import android.content.ActivityNotFoundException
 import android.content.Context
+import android.content.Intent
 import android.content.SharedPreferences
+import android.net.Uri
 import android.os.Bundle
 import android.view.View
+import android.widget.Toast
 import androidx.core.content.edit
+import androidx.preference.PreferenceManager
 import com.google.gson.Gson
 import com.zhuinden.fragmentviewbindingdelegatekt.viewBinding
 import de.tum.`in`.tumcampusapp.R
@@ -23,8 +28,6 @@ import de.tum.`in`.tumcampusapp.utils.CacheManager
 import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.NetUtils
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.defaultSharedPreferences
-import org.jetbrains.anko.support.v4.browse
 import java.io.IOException
 import javax.inject.Inject
 
@@ -91,7 +94,18 @@ class OnboardingExtrasFragment : FragmentForLoadingInBackground<ChatMember>(
                 cacheManager.fillCache()
             }
 
-            privacyPolicyButton.setOnClickListener { browse(getString(R.string.url_privacy_policy)) }
+            privacyPolicyButton.setOnClickListener {
+                // open url in default browser
+                val browserIntent = Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_privacy_policy)))
+                try {
+                    startActivity(browserIntent)
+                }
+                // if no browser is installed catch exception and inform user
+                catch (e: ActivityNotFoundException) {
+                    Utils.log(e)
+                    Toast.makeText(requireContext(), R.string.error_opening_url, Toast.LENGTH_LONG).show()
+                }
+            }
             finishButton.setOnClickListener { startLoading() }
         }
     }
@@ -162,8 +176,7 @@ class OnboardingExtrasFragment : FragmentForLoadingInBackground<ChatMember>(
 
         // Gets the editor for editing preferences and updates the preference values with the
         // chosen state
-        requireContext()
-            .defaultSharedPreferences
+        PreferenceManager.getDefaultSharedPreferences(requireContext())
             .edit {
                 with(binding) {
                     putBoolean(Const.SILENCE_SERVICE, silentModeCheckBox.isChecked)
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingStartFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingStartFragment.kt
index 9a65824f7..080671d30 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingStartFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/OnboardingStartFragment.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.os.Build
 import android.os.Bundle
 import android.view.View
+import android.view.inputmethod.InputMethodManager
 import androidx.core.content.ContextCompat
 import com.jakewharton.rxbinding3.widget.textChanges
 import com.zhuinden.fragmentviewbindingdelegatekt.viewBinding
@@ -29,7 +30,6 @@ import de.tum.`in`.tumcampusapp.utils.plusAssign
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.schedulers.Schedulers
-import org.jetbrains.anko.inputMethodManager
 import java.util.Locale
 import javax.inject.Inject
 
@@ -208,7 +208,8 @@ class OnboardingStartFragment : BaseFragment<Unit>(
     }
 
     private fun hideKeyboard() {
-        requireContext().inputMethodManager.hideSoftInputFromWindow(binding.lrzIdTextView.windowToken, 0)
+        (requireContext().getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager)
+            .hideSoftInputFromWindow(binding.lrzIdTextView.windowToken, 0)
     }
 
     private fun openNextOnboardingStep() {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/StartupActivity.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/StartupActivity.kt
index bd6d3c72b..4bdcd3280 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/StartupActivity.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/onboarding/StartupActivity.kt
@@ -10,6 +10,7 @@ import androidx.core.app.ActivityCompat.checkSelfPermission
 import androidx.core.app.ActivityCompat.requestPermissions
 import androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale
 import androidx.lifecycle.LiveDataReactiveStreams
+import androidx.lifecycle.lifecycleScope
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import de.tum.`in`.tumcampusapp.BuildConfig.DEBUG
 import de.tum.`in`.tumcampusapp.BuildConfig.VERSION_CODE
@@ -27,7 +28,10 @@ import de.tum.`in`.tumcampusapp.utils.Utils
 import de.tum.`in`.tumcampusapp.utils.observe
 import io.reactivex.Flowable
 import io.reactivex.schedulers.Schedulers
-import org.jetbrains.anko.doAsync
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import java.util.concurrent.atomic.AtomicBoolean
 import javax.inject.Inject
 
@@ -35,6 +39,7 @@ class StartupActivity : BaseActivity(R.layout.activity_startup) {
 
     private val initializationFinished = AtomicBoolean(false)
     private var tapCounter = 0 // for easter egg
+    private val ioDispatcher: CoroutineDispatcher = Dispatchers.IO
 
     @Inject
     lateinit var workerActions: DownloadWorker.WorkerActions
@@ -69,7 +74,7 @@ class StartupActivity : BaseActivity(R.layout.activity_startup) {
         Utils.setSetting(this, Const.SAVED_APP_VERSION, VERSION_CODE)
 
         initEasterEgg()
-        doAsync {
+        this.lifecycleScope.launch {
             initApp()
         }
     }
@@ -95,36 +100,38 @@ class StartupActivity : BaseActivity(R.layout.activity_startup) {
         }
     }
 
-    private fun initApp() {
-        // Migrate all settings - we somehow ended up having two different shared prefs: join them
-        // back together
-        Utils.migrateSharedPreferences(this)
+    private suspend fun initApp() {
+        withContext(ioDispatcher) {
+            // Migrate all settings - we somehow ended up having two different shared prefs: join them
+            // back together
+            Utils.migrateSharedPreferences(this@StartupActivity)
 
-        // Check that we have a private key setup in order to authenticate this device
-        authManager.generatePrivateKey(null)
+            // Check that we have a private key setup in order to authenticate this device
+            authManager.generatePrivateKey(null)
 
-        // On first setup show remark that loading could last longer than normally
-        runOnUiThread {
-            binding.startupLoadingProgressBar.show()
-        }
+            // On first setup show remark that loading could last longer than normally
+            runOnUiThread {
+                binding.startupLoadingProgressBar.show()
+            }
 
-        // Start download workers and listen for finalization
-        val downloadActions = Flowable
-            .fromCallable(this::performAllWorkerActions)
-            .onErrorReturnItem(Unit)
-            .subscribeOn(Schedulers.io())
+            // Start download workers and listen for finalization
+            val downloadActions = Flowable
+                .fromCallable(this@StartupActivity::performAllWorkerActions)
+                .onErrorReturnItem(Unit)
+                .subscribeOn(Schedulers.io())
 
-        runOnUiThread {
-            LiveDataReactiveStreams
-                .fromPublisher(downloadActions)
-                .observe(this) { openMainActivityIfInitializationFinished() }
-        }
+            runOnUiThread {
+                LiveDataReactiveStreams
+                    .fromPublisher(downloadActions)
+                    .observe(this@StartupActivity) { openMainActivityIfInitializationFinished() }
+            }
 
-        // Start background service and ensure cards are set
-        sendBroadcast(Intent(this, StartSyncReceiver::class.java))
+            // Start background service and ensure cards are set
+            sendBroadcast(Intent(this@StartupActivity, StartSyncReceiver::class.java))
 
-        // Request permissions for Android 6 and up
-        requestLocationPermission()
+            // Request permissions for Android 6 and up
+            requestLocationPermission()
+        }
     }
 
     private fun performAllWorkerActions() {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardManager.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardManager.kt
index ed6e6e7b0..588778303 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardManager.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardManager.kt
@@ -1,11 +1,11 @@
 package de.tum.`in`.tumcampusapp.component.ui.overview
 
 import android.content.Context
+import androidx.preference.PreferenceManager
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.database.TcaDb
 import de.tum.`in`.tumcampusapp.utils.Const.CARD_POSITION_PREFERENCE_SUFFIX
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.defaultSharedPreferences
 
 /**
  * Card manager, manages inserting, dismissing, updating and displaying of cards
@@ -56,7 +56,7 @@ object CardManager {
     }
 
     private fun restoreCardPositions(context: Context) {
-        val preferences = context.defaultSharedPreferences
+        val preferences = PreferenceManager.getDefaultSharedPreferences(context)
         val editor = preferences.edit()
 
         for (s in preferences.all.keys) {
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardsRepository.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardsRepository.kt
index 358293f94..dd23c3212 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardsRepository.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/CardsRepository.kt
@@ -35,8 +35,7 @@ class CardsRepository @Inject constructor(
     private val ioDispatcher: CoroutineDispatcher = Dispatchers.IO
 
     /**
-     * Starts refresh of [Card]s and returns the corresponding [LiveData]
-     * through which the result can be received.
+     * Returns the [LiveData] of the Repository
      *
      * @return The [LiveData] of [Card]s
      */
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainActivityViewModel.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainActivityViewModel.kt
index 84cbbf109..ce64fe949 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainActivityViewModel.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainActivityViewModel.kt
@@ -13,6 +13,7 @@ class MainActivityViewModel @Inject constructor(
 ) : ViewModel() {
 
     val cards: LiveData<List<Card>>
+        // on get refresh cards
         get() {
             viewModelScope.launch {
                 cardsRepo.refreshCards(CacheControl.USE_CACHE)
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainFragment.kt
index 62dc76b7a..2f088aff0 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/MainFragment.kt
@@ -8,6 +8,7 @@ import android.net.NetworkRequest
 import android.os.Bundle
 import android.view.View
 import androidx.lifecycle.ViewModelProviders
+import androidx.lifecycle.viewModelScope
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -30,8 +31,9 @@ import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.NetUtils
 import de.tum.`in`.tumcampusapp.utils.Utils
 import de.tum.`in`.tumcampusapp.utils.observe
-import org.jetbrains.anko.connectivityManager
-import org.jetbrains.anko.support.v4.runOnUiThread
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import org.joda.time.DateTime
 import java.util.*
 import javax.inject.Inject
@@ -48,11 +50,13 @@ class MainFragment :
 
     private var isConnectivityChangeReceiverRegistered = false
     private val connectivityManager: ConnectivityManager by lazy {
-        requireContext().connectivityManager
+        requireContext().getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
     }
     private val networkCallback = object : ConnectivityManager.NetworkCallback() {
         override fun onAvailable(network: Network) {
-            runOnUiThread { this@MainFragment.refreshCards() }
+            viewModel.viewModelScope.launch(mainDispatcher) {
+                this@MainFragment.refreshCards()
+            }
         }
     }
 
@@ -60,6 +64,8 @@ class MainFragment :
 
     private val binding by viewBinding(FragmentMainBinding::bind)
 
+    private val mainDispatcher: CoroutineDispatcher = Dispatchers.Main
+
     override val swipeRefreshLayout get() = binding.swipeRefreshLayout
 
     @Inject
@@ -212,7 +218,8 @@ class MainFragment :
         fun newInstance() = MainFragment()
     }
 
-    private inner class ItemTouchHelperCallback : ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP or ItemTouchHelper.DOWN, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) {
+    private inner class ItemTouchHelperCallback :
+        ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP or ItemTouchHelper.DOWN, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) {
 
         override fun getSwipeDirs(
             recyclerView: RecyclerView,
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/card/Card.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/card/Card.kt
index 3de56f7ef..d1f570d91 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/card/Card.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/overview/card/Card.kt
@@ -3,13 +3,13 @@ package de.tum.`in`.tumcampusapp.component.ui.overview.card
 import android.content.Context
 import android.content.SharedPreferences
 import android.content.SharedPreferences.Editor
+import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.DiffUtil
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.other.navigation.NavDestination
 import de.tum.`in`.tumcampusapp.component.ui.overview.CardManager
 import de.tum.`in`.tumcampusapp.utils.Const.CARD_POSITION_PREFERENCE_SUFFIX
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.defaultSharedPreferences
 
 /**
  * Base class for all cards
@@ -79,7 +79,7 @@ abstract class Card(
      * @return The Card to be displayed or null
      */
     open fun getIfShowOnStart(): Card? {
-        if (context.defaultSharedPreferences.getBoolean(context.getString(cardType.showCardPreferenceStringRes), true)) {
+        if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(context.getString(cardType.showCardPreferenceStringRes), true)) {
             if (shouldShow(dismissCardSharedPreferences)) {
                 return this
             }
@@ -102,7 +102,7 @@ abstract class Card(
      * reactivated manually by the user
      */
     open fun hideAlways() {
-        context.defaultSharedPreferences
+        PreferenceManager.getDefaultSharedPreferences(context)
             .edit()
             .putBoolean(context.getString(cardType.showCardPreferenceStringRes), false)
             .apply()
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomGroupManager.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomGroupManager.kt
index f072472ae..9c95b8e41 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomGroupManager.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomGroupManager.kt
@@ -4,7 +4,9 @@ import android.content.Context
 import de.tum.`in`.tumcampusapp.component.ui.studyroom.model.StudyRoom
 import de.tum.`in`.tumcampusapp.component.ui.studyroom.model.StudyRoomGroup
 import de.tum.`in`.tumcampusapp.database.TcaDb
-import org.jetbrains.anko.doAsync
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 /**
  * Handles content for the study room feature, fetches external data.
@@ -14,14 +16,17 @@ class StudyRoomGroupManager(context: Context) {
     private val roomsDao: StudyRoomDao
     private val groupsDao: StudyRoomGroupDao
 
+    private val ioDispatcher: CoroutineDispatcher = Dispatchers.IO
+
     init {
         val db = TcaDb.getInstance(context)
         roomsDao = db.studyRoomDao()
         groupsDao = db.studyRoomGroupDao()
     }
 
-    fun updateDatabase(groups: List<StudyRoomGroup>, callback: () -> Unit) {
-        doAsync {
+    suspend fun updateDatabase(groups: List<StudyRoomGroup>) {
+        // moves to IOThread to not block MainThread
+        withContext(ioDispatcher) {
             groupsDao.removeCache()
             roomsDao.removeCache()
 
@@ -30,13 +35,15 @@ class StudyRoomGroupManager(context: Context) {
             groups.forEach { group ->
                 group.rooms.forEach { room ->
                     // only insert rooms that have data
-                    if (room.code != "" && room.name != "" && room.buildingName != "" && room.id != -1) {
+                    if (room.code != "" &&
+                        room.name != "" &&
+                        room.buildingName != "" &&
+                        room.id != -1
+                    ) {
                         roomsDao.insert(room)
                     }
                 }
             }
-
-            callback()
         }
     }
 
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomsFragment.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomsFragment.kt
index 5473f1bc2..e16fdc380 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomsFragment.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/studyroom/StudyRoomsFragment.kt
@@ -7,12 +7,15 @@ import android.widget.AdapterView
 import android.widget.ArrayAdapter
 import android.widget.Spinner
 import android.widget.TextView
+import androidx.lifecycle.lifecycleScope
 import com.zhuinden.fragmentviewbindingdelegatekt.viewBinding
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.other.generic.fragment.FragmentForAccessingTumCabe
 import de.tum.`in`.tumcampusapp.component.ui.studyroom.model.StudyRoomGroup
 import de.tum.`in`.tumcampusapp.databinding.FragmentStudyRoomsBinding
-import org.jetbrains.anko.support.v4.runOnUiThread
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 class StudyRoomsFragment :
     FragmentForAccessingTumCabe<List<StudyRoomGroup>>(
@@ -21,6 +24,8 @@ class StudyRoomsFragment :
     ),
     AdapterView.OnItemSelectedListener {
 
+    private val mainDispatcher: CoroutineDispatcher = Dispatchers.Main
+
     private val sectionsPagerAdapter by lazy { StudyRoomsPagerAdapter(childFragmentManager) }
     private val studyRoomGroupManager by lazy { StudyRoomGroupManager(requireContext()) }
 
@@ -91,8 +96,11 @@ class StudyRoomsFragment :
     }
 
     override fun onDownloadSuccessful(response: List<StudyRoomGroup>) {
-        studyRoomGroupManager.updateDatabase(response) {
-            runOnUiThread {
+        // launches coroutine on MainThread that will call finally block after finishing
+        lifecycleScope.launch(mainDispatcher) {
+            try {
+                studyRoomGroupManager.updateDatabase(response)
+            } finally {
                 groups = response
                 displayStudyRooms()
             }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/ticket/TicketAmountViewHolder.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/ticket/TicketAmountViewHolder.kt
index 399b55401..457d475ec 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/ticket/TicketAmountViewHolder.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/ticket/TicketAmountViewHolder.kt
@@ -1,5 +1,6 @@
 package de.tum.`in`.tumcampusapp.component.ui.ticket
 
+import android.content.res.Resources
 import android.view.View
 import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
@@ -7,7 +8,6 @@ import com.google.android.material.button.MaterialButton
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.ui.ticket.model.TicketType
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.textColor
 
 class TicketAmountViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
 
@@ -58,7 +58,7 @@ class TicketAmountViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView)
             currentAmount.text = ticketAmount.toString()
             plusButton.isEnabled = false
             minusButton.isEnabled = false
-            ticketTypeName.textColor = R.color.text_light_gray
+            ticketTypeName.setTextColor(Resources.getSystem().getColor(R.color.text_light_gray, null))
         }
         updateButtonState()
     }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/transportation/widget/MVVWidget.kt b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/transportation/widget/MVVWidget.kt
index a390605c5..031e5f443 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/component/ui/transportation/widget/MVVWidget.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/component/ui/transportation/widget/MVVWidget.kt
@@ -12,7 +12,6 @@ import android.view.View
 import android.widget.RemoteViews
 import de.tum.`in`.tumcampusapp.R
 import de.tum.`in`.tumcampusapp.component.ui.transportation.TransportController
-import org.jetbrains.anko.alarmManager
 import java.util.*
 
 /**
@@ -57,7 +56,7 @@ class MVVWidget : AppWidgetProvider() {
 
         val intent = Intent(context, MVVWidget::class.java)
         val sender = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_IMMUTABLE)
-        val alarmManager = context.alarmManager
+        val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
         alarmManager.cancel(sender)
         if (autoReload) {
             intent.action = BROADCAST_RELOAD_ALL_ALARM
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/di/AppModule.kt b/app/src/main/java/de/tum/in/tumcampusapp/di/AppModule.kt
index fb00d5456..00bb49940 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/di/AppModule.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/di/AppModule.kt
@@ -2,8 +2,8 @@ package de.tum.`in`.tumcampusapp.di
 
 import android.content.Context
 import android.content.SharedPreferences
-import android.preference.PreferenceManager
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
+import androidx.preference.PreferenceManager
 import dagger.Binds
 import dagger.Module
 import dagger.Provides
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/service/FcmReceiverService.kt b/app/src/main/java/de/tum/in/tumcampusapp/service/FcmReceiverService.kt
index 10eaa9c25..b71eda129 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/service/FcmReceiverService.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/service/FcmReceiverService.kt
@@ -2,6 +2,7 @@ package de.tum.`in`.tumcampusapp.service
 
 import android.os.Bundle
 import androidx.annotation.IntDef
+import androidx.core.app.NotificationManagerCompat
 import com.google.firebase.installations.FirebaseInstallations
 import com.google.firebase.messaging.FirebaseMessagingService
 import com.google.firebase.messaging.RemoteMessage
@@ -11,7 +12,6 @@ import de.tum.`in`.tumcampusapp.component.other.generic.PushNotification
 import de.tum.`in`.tumcampusapp.component.ui.alarm.AlarmPushNotification
 import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.notificationManager
 import java.io.IOException
 
 /**
@@ -105,7 +105,7 @@ class FcmReceiverService : FirebaseMessagingService() {
      */
     private fun postNotification(pushNotification: PushNotification) {
         pushNotification.notification?.let {
-            val manager = applicationContext.notificationManager
+            val manager = NotificationManagerCompat.from(applicationContext)
             manager.notify(pushNotification.displayNotificationId, it)
         }
     }
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/service/ScanResultsAvailableReceiver.kt b/app/src/main/java/de/tum/in/tumcampusapp/service/ScanResultsAvailableReceiver.kt
index b0130f02a..be74f0821 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/service/ScanResultsAvailableReceiver.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/service/ScanResultsAvailableReceiver.kt
@@ -8,6 +8,7 @@ import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager.PERMISSION_GRANTED
+import android.net.wifi.WifiManager
 import android.net.wifi.WifiManager.SCAN_RESULTS_AVAILABLE_ACTION
 import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
@@ -18,7 +19,6 @@ import de.tum.`in`.tumcampusapp.component.ui.eduroam.SetupEduroamActivity
 import de.tum.`in`.tumcampusapp.utils.Const
 import de.tum.`in`.tumcampusapp.utils.NetUtils
 import de.tum.`in`.tumcampusapp.utils.Utils
-import org.jetbrains.anko.wifiManager
 
 /**
  * Listens for android's ScanResultsAvailable broadcast and checks if eduroam is nearby.
@@ -38,7 +38,7 @@ class ScanResultsAvailableReceiver : BroadcastReceiver() {
             return
         }
 
-        if (!context.wifiManager.isWifiEnabled) {
+        if ((context.getSystemService(Context.WIFI_SERVICE) as WifiManager).isWifiEnabled) {
             return
         }
 
@@ -55,7 +55,7 @@ class ScanResultsAvailableReceiver : BroadcastReceiver() {
         val isEduroamConfigured = EduroamController.getEduroamConfig(context) != null ||
             NetUtils.isConnected(context)
 
-        context.wifiManager.scanResults.forEach { network ->
+        (context.getSystemService(Context.WIFI_SERVICE) as WifiManager).scanResults.forEach { network ->
             if (network.SSID != Const.EDUROAM_SSID && network.SSID != Const.LRZ) {
                 return@forEach
             }
@@ -102,8 +102,10 @@ class ScanResultsAvailableReceiver : BroadcastReceiver() {
             val setupIntent = Intent(context, SetupEduroamActivity::class.java)
             val hideIntent = Intent(context, NeverShowAgainService::class.java)
 
-            val setupPendingIntent = PendingIntent.getActivity(context, 0, setupIntent, PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT)
-            val hidePendingIntent = PendingIntent.getService(context, 0, hideIntent, PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT)
+            val setupPendingIntent =
+                PendingIntent.getActivity(context, 0, setupIntent, PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT)
+            val hidePendingIntent =
+                PendingIntent.getService(context, 0, hideIntent, PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT)
 
             // Create FcmNotification using NotificationCompat.Builder
             val notification = NotificationCompat.Builder(context, Const.NOTIFICATION_CHANNEL_EDUROAM)
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/utils/CacheManager.kt b/app/src/main/java/de/tum/in/tumcampusapp/utils/CacheManager.kt
index d20e4c955..452af6b5e 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/utils/CacheManager.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/utils/CacheManager.kt
@@ -1,13 +1,17 @@
 package de.tum.`in`.tumcampusapp.utils
 
 import android.content.Context
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.OutOfQuotaPolicy
+import androidx.work.WorkManager
+import androidx.work.Worker
+import androidx.work.WorkerParameters
 import de.tum.`in`.tumcampusapp.api.tumonline.CacheControl
 import de.tum.`in`.tumcampusapp.api.tumonline.TUMOnlineClient
 import de.tum.`in`.tumcampusapp.component.tumui.calendar.CalendarController
 import de.tum.`in`.tumcampusapp.component.tumui.calendar.model.EventsResponse
 import de.tum.`in`.tumcampusapp.service.QueryLocationWorker
 import okhttp3.Cache
-import org.jetbrains.anko.doAsync
 import retrofit2.Call
 import retrofit2.Callback
 import retrofit2.Response
@@ -19,9 +23,19 @@ class CacheManager @Inject constructor(private val context: Context) {
         get() = Cache(context.cacheDir, 10 * 1024 * 1024) // 10 MB
 
     fun fillCache() {
-        doAsync {
-            syncCalendar()
+        class WorkWhenReceived(appContext: Context, workerParams: WorkerParameters) :
+            Worker(appContext, workerParams) {
+            override fun doWork(): Result {
+                syncCalendar()
+                return Result.success()
+            }
         }
+        // start expedited background work
+        val request = OneTimeWorkRequestBuilder<WorkWhenReceived>()
+            .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+            .build()
+        WorkManager.getInstance(context)
+            .enqueue(request)
     }
 
     private fun syncCalendar() {
@@ -42,9 +56,8 @@ class CacheManager @Inject constructor(private val context: Context) {
     }
 
     private fun loadRoomLocations() {
-        doAsync {
-            QueryLocationWorker.enqueueWork(context)
-        }
+        // enqueues OneTimeWorkRequest
+        QueryLocationWorker.enqueueWork(context)
     }
 
     @Synchronized
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/utils/ColorUtils.kt b/app/src/main/java/de/tum/in/tumcampusapp/utils/ColorUtils.kt
index c52705e4d..da6f7cbef 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/utils/ColorUtils.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/utils/ColorUtils.kt
@@ -15,3 +15,17 @@ object ColorUtils {
         return Color.HSVToColor(hsv)
     }
 }
+
+/**
+ * Return the color with the given alpha value.
+ * Examples:
+ *   0xabcdef.withAlpha(0xCF) == 0xCFabcdef
+ *   0xFFabcdef.withAlpha(0xCF) == 0xCFabcdef
+ *
+ * @param alpha the alpha channel value: [0x0..0xFF].
+ * @return the color with the given alpha value applied.
+ */
+fun Int.withAlpha(alpha: Int): Int {
+    require(alpha in 0..0xFF)
+    return this and 0x00FFFFFF or (alpha shl 24)
+}
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/utils/NetUtils.kt b/app/src/main/java/de/tum/in/tumcampusapp/utils/NetUtils.kt
index e2fd56986..4ff8023c9 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/utils/NetUtils.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/utils/NetUtils.kt
@@ -1,13 +1,13 @@
 package de.tum.`in`.tumcampusapp.utils
 
 import android.content.Context
+import android.net.ConnectivityManager
 import android.net.NetworkCapabilities
 import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED
 import android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED
 import android.os.Build.VERSION.SDK_INT
 import android.os.Build.VERSION_CODES.M
-import org.jetbrains.anko.connectivityManager
 
 object NetUtils {
 
@@ -22,7 +22,7 @@ object NetUtils {
         context: Context,
         condition: (NetworkCapabilities) -> Boolean = { true }
     ): Boolean {
-        val connectivityMgr = context.connectivityManager
+        val connectivityMgr = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
 
         return connectivityMgr.allNetworks.asSequence().filter {
             connectivityMgr.getNetworkInfo(it)?.isConnected ?: false
diff --git a/app/src/main/java/de/tum/in/tumcampusapp/utils/Utils.kt b/app/src/main/java/de/tum/in/tumcampusapp/utils/Utils.kt
index ce3b197b9..76ead3d38 100644
--- a/app/src/main/java/de/tum/in/tumcampusapp/utils/Utils.kt
+++ b/app/src/main/java/de/tum/in/tumcampusapp/utils/Utils.kt
@@ -16,7 +16,6 @@ import androidx.core.content.pm.PackageInfoCompat
 import androidx.preference.PreferenceManager
 import com.google.gson.Gson
 import de.tum.`in`.tumcampusapp.BuildConfig
-import org.jetbrains.anko.defaultSharedPreferences
 import java.io.IOException
 import java.io.PrintWriter
 import java.io.StringWriter
@@ -39,7 +38,7 @@ object Utils {
             return
         }
 
-        val prefsEditor = context.defaultSharedPreferences.edit()
+        val prefsEditor = PreferenceManager.getDefaultSharedPreferences(context).edit()
 
         for ((key, value) in entries) {
             when (value) {
@@ -312,6 +311,7 @@ object Utils {
                 val back = abs(meters / 100f).toInt() % 10
                 "$front.${back}km"
             }
+
             else -> "${(meters / 1000f).toInt()}km"
         }
     }
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 7afb5c6b7..c7cc9135d 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -688,6 +688,7 @@ Signatur: %5$s</string>
     <string name="enter_name_placeholder">Name eingeben …</string>
     <string name="go_to_room">Raum anzeigen</string>
     <string name="enter_your_tum_id">TUM-ID eingeben …</string>
+    <string name="error_opening_url">Es wurde kein Webbrowser gefunden um die URL zu öffnen.</string>
 
     <string name="send_feedback_question">Feedback absenden?</string>
     <string name="feedback_empty">Bitte gib hier dein Feedback ein</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9d6514f75..f79373dc7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -701,6 +701,7 @@ Signature: %5$s</string>
     <string name="open_tum_online">Open TUMonline</string>
     <string name="go_to_room">Go to room</string>
     <string name="topic">Topic:</string>
+    <string name="error_opening_url">No Web Browser found to open the URL.</string>
 
     <string name="add">Add</string>
     <string name="recents">Recents</string>