Replaced fragment switching functionality in MainActivity.kt with Navigation component, simplifying logic significantly; upgraded to AGP 8.0.1

app/src/main/java/com/denizk0461/studip/viewmodel/CanteenPageViewModel.kt

@@ -43,7 +43,6 @@ class CanteenPageViewModel(app: Application) : AppViewModel(app) {
     /**
      * This value determines which canteen the user has selected.
      */
-    var preferenceColour: Boolean
-        get() = repo.getBooleanPreference(SettingsPreferences.COLOUR_PREFS)
-        set(newValue) { repo.setPreference(SettingsPreferences.COLOUR_PREFS, newValue) }
+    val preferenceColour: Boolean
+        get() = repo.getBooleanPreference(SettingsPreferences.COLOUR_PREFS, defaultValue = true)
 }

app/src/main/java/com/denizk0461/studip/viewmodel/EventPageViewModel.kt

@@ -2,6 +2,7 @@ package com.denizk0461.studip.viewmodel
 
 import android.app.Application
 import androidx.lifecycle.LiveData
+import com.denizk0461.studip.model.SettingsPreferences
 import com.denizk0461.studip.model.StudIPEvent
 
 /**
@@ -17,4 +18,14 @@ class EventPageViewModel(app: Application) : AppViewModel(app) {
      * @return  Stud.IP events for a certain day exposed through a LiveData object
      */
     fun getEventsForDay(day: Int): LiveData<List<StudIPEvent>> = repo.getEventsForDay(day)
+
+    /**
+     * This value determines whether the user wants to have the next course in their schedule
+     * highlighted.
+     */
+    val preferenceCourseHighlighting: Boolean
+        get() = repo.getBooleanPreference(
+            SettingsPreferences.COURSE_HIGHLIGHTING,
+            defaultValue = true
+        )
 }

app/src/main/java/com/denizk0461/studip/viewmodel/SettingsViewModel.kt

@@ -15,7 +15,10 @@ class SettingsViewModel(app: Application) : AppViewModel(app) {
      * highlighted.
      */
     var preferenceCourseHighlighting: Boolean
-        get() = repo.getBooleanPreference(SettingsPreferences.COURSE_HIGHLIGHTING)
+        get() = repo.getBooleanPreference(
+            SettingsPreferences.COURSE_HIGHLIGHTING,
+            defaultValue = true
+        )
         set(newValue) { repo.setPreference(SettingsPreferences.COURSE_HIGHLIGHTING, newValue) }
 
     /**
@@ -36,7 +39,7 @@ class SettingsViewModel(app: Application) : AppViewModel(app) {
      * This value determines which canteen the user has selected.
      */
     var preferenceColour: Boolean
-        get() = repo.getBooleanPreference(SettingsPreferences.COLOUR_PREFS)
+        get() = repo.getBooleanPreference(SettingsPreferences.COLOUR_PREFS, defaultValue = true)
         set(newValue) { repo.setPreference(SettingsPreferences.COLOUR_PREFS, newValue) }
 
     /**