Linting Part 1

app/src/main/java/de/tum/in/tumcampusapp/api/app/model/ObfuscatedIdsUpload.kt

@@ -3,8 +3,6 @@ package de.tum.`in`.tumcampusapp.api.app.model
 import com.google.gson.annotations.SerializedName
 
 /**
- * @param fcmToken can be null/uploaded/invalid
- * @param publicKey can be null/uploaded/verified
  * @param studentId true if uploaded
  * @param employeeId true if uploaded
  * @param externalId true if uploaded

app/src/main/java/de/tum/in/tumcampusapp/api/tumonline/converters/EscapedStringConverter.kt

@@ -19,6 +19,7 @@ class EscapedStringConverter : TypeConverter<String> {
         return if (Build.VERSION.SDK_INT >= 24) {
             Html.fromHtml(str, Html.FROM_HTML_MODE_LEGACY).toString()
         } else {
+            @Suppress("DEPRECATION") // SDK version checked
             Html.fromHtml(str).toString()
         }
     }

app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/BaseNavigationActivity.kt

@@ -35,11 +35,11 @@ class BaseNavigationActivity :
     }
 
     private val drawerLayout: DrawerLayout by lazy {
-        findViewById<DrawerLayout>(R.id.drawer_layout)
+        findViewById(R.id.drawer_layout)
     }
 
     private val navigationView: NavigationView by lazy {
-        findViewById<NavigationView>(R.id.left_drawer)
+        findViewById(R.id.left_drawer)
     }
 
     private val drawerMenuHelper: DrawerMenuHelper by lazy {

app/src/main/java/de/tum/in/tumcampusapp/component/other/generic/activity/ProgressActivity.kt

@@ -54,35 +54,35 @@ abstract class ProgressActivity<T>(
     }
 
     protected val swipeRefreshLayout: SwipeRefreshLayout? by lazy {
-        findViewById<SwipeRefreshLayout>(R.id.swipeRefreshLayout)
+        findViewById(R.id.swipeRefreshLayout)
     }
 
     private val errorLayoutsContainer: FrameLayout by lazy {
-        findViewById<FrameLayout>(R.id.errors_layout)
+        findViewById(R.id.errors_layout)
     }
 
     private val errorLayout: LinearLayout by lazy {
-        findViewById<LinearLayout>(R.id.layout_error)
+        findViewById(R.id.layout_error)
     }
 
     private val errorIconImageView: ImageView by lazy {
-        findViewById<ImageView>(R.id.iconImageView)
+        findViewById(R.id.iconImageView)
     }
 
     private val errorHeaderTextView: TextView by lazy {
-        errorLayout.findViewById<TextView>(R.id.headerTextView)
+        errorLayout.findViewById(R.id.headerTextView)
     }
 
     private val errorMessageTextView: TextView by lazy {
-        errorLayout.findViewById<TextView>(R.id.messageTextView)
+        errorLayout.findViewById(R.id.messageTextView)
     }
 
     private val errorButton: MaterialButton by lazy {
-        errorLayout.findViewById<MaterialButton>(R.id.button)
+        errorLayout.findViewById(R.id.button)
     }
 
     private val progressLayout: FrameLayout by lazy {
-        findViewById<FrameLayout>(R.id.layout_progress)
+        findViewById(R.id.layout_progress)
     }
 
     private var registered: Boolean = false

app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/CreateEventActivity.kt

@@ -1,7 +1,6 @@
 package de.tum.`in`.tumcampusapp.component.tumui.calendar
 
 import android.app.Activity
-import android.app.DatePickerDialog
 import android.content.Context
 import android.content.Intent
 import android.content.res.ColorStateList
@@ -39,7 +38,6 @@ import retrofit2.Callback
 import retrofit2.Response
 import java.net.UnknownHostException
 import java.util.Locale
-import kotlin.collections.ArrayList
 
 /**
  * Allows the user to create (and edit) a private event in TUMonline.
@@ -184,7 +182,7 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
 
         binding.eventLastDateView.setOnClickListener {
             hideKeyboard()
-            DatePickerDialog(this, { _, year, month, dayOfMonth ->
+            ThemedDatePickerDialog(this, { _, year, month, dayOfMonth ->
                 repeatHelper.end = repeatHelper.end?.withDate(year, month + 1, dayOfMonth)
                 updateDateViews()
             }, repeatHelper.end?.year!!, repeatHelper.end?.monthOfYear!! - 1, repeatHelper.end?.dayOfMonth!!).show()
@@ -224,31 +222,19 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
         val eventTitle = extras?.getSerializable(Const.EVENT_TITLE) as String?
         val startTime = extras?.getSerializable(Const.EVENT_START) as DateTime?
 
-        if (eventNr == null || eventTitle == null || startTime == null) {
-            return
-        }
+        if (eventNr == null || eventTitle == null || startTime == null) return
 
-        val calendarItem = CalendarItem(
-            nr = eventNr,
-            title = eventTitle,
-            dtstart = startTime,
-            url = ""
-        )
+        val calendarItem = CalendarItem(nr = eventNr, title = eventTitle, dtstart = startTime, url = "")
 
         val currentColor = eventColorController.getResourceColor(calendarItem)
         val colorText = getTextColorByColor(currentColor)
         binding.colorChangeBtn?.text = getString(colorText)
         binding.colorChangeBtn?.buttonTintList = ColorStateList.valueOf(ContextCompat.getColor(this, currentColor))
 
         binding.colorChangeBtn?.setOnClickListener {
-            val dialog = ChangeEventColorDialog(
-                context = this,
-                calendarItem = calendarItem,
-                onColorChanged = { data ->
-                    updateEventColorInput(data)
-                },
-                fromCreateEventActivity = true
-            )
+            val dialog = ChangeEventColorDialog(context = this, calendarItem = calendarItem, onColorChanged = { data ->
+                updateEventColorInput(data)
+            }, fromCreateEventActivity = true)
             dialog.show()
             dialog.window?.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
         }
@@ -273,14 +259,9 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
 
     private fun initEventColorOnClickListener() {
         binding.colorChangeBtn?.setOnClickListener {
-            val dialog = ChangeEventColorDialog(
-                context = this,
-                calendarItem = CalendarItem(),
-                onColorChanged = { data ->
-                    updateEventColorInput(data)
-                },
-                fromCreateEventActivity = true
-            )
+            val dialog = ChangeEventColorDialog(context = this, calendarItem = CalendarItem(), onColorChanged = { data ->
+                updateEventColorInput(data)
+            }, fromCreateEventActivity = true)
             dialog.show()
             dialog.window?.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
         }
@@ -320,47 +301,35 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
         }
 
         // TIME
-        binding.eventStartTimeView.setOnClickListener {
+        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, { _, hour, minute ->
+                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 {
+        binding.eventEndTimeView.setOnClickListener { _ ->
             hideKeyboard()
             ThemedTimePickerDialog(this, { _, hour, minute ->
-                end = end.withHourOfDay(hour)
-                    .withMinuteOfHour(minute)
+                end = end.withHourOfDay(hour).withMinuteOfHour(minute)
                 updateTimeViews()
             }, end.hourOfDay, end.minuteOfHour).show()
         }
     }
 
     private fun updateTimeViews() {
-        val format = DateTimeFormat.forPattern("HH:mm")
-            .withLocale(Locale.getDefault())
+        val format = DateTimeFormat.forPattern("HH:mm").withLocale(Locale.getDefault())
         with(binding) {
             eventStartTimeView.text = format.print(start)
             eventEndTimeView.text = format.print(end)
         }
     }
 
     private fun updateDateViews() {
-        val format = DateTimeFormat.forPattern("EEE, dd.MM.yyyy")
-            .withLocale(Locale.getDefault())
+        val format = DateTimeFormat.forPattern("EEE, dd.MM.yyyy").withLocale(Locale.getDefault())
         with(binding) {
             eventStartDateView.text = format.print(start)
             eventEndDateView.text = format.print(end)
@@ -376,31 +345,23 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
         // request), we use a short Toast to let the user know that something is happening.
         Toast.makeText(this, R.string.updating_event, Toast.LENGTH_SHORT).show()
 
-        apiClient
-            .deleteEvent(eventId)
-            .enqueue(object : Callback<DeleteEventResponse> {
-                override fun onResponse(
-                    call: Call<DeleteEventResponse>,
-                    response: Response<DeleteEventResponse>
-                ) {
-                    if (response.isSuccessful) {
-                        Utils.log("Event successfully deleted (now creating the edited version)")
-                        TcaDb.getInstance(this@CreateEventActivity).calendarDao().delete(eventId)
-                        eventColorController.removeEventColor(eventId)
-                        createEvent()
-                    } else {
-                        Utils.showToast(this@CreateEventActivity, R.string.error_unknown)
-                    }
+        apiClient.deleteEvent(eventId).enqueue(object : Callback<DeleteEventResponse> {
+            override fun onResponse(call: Call<DeleteEventResponse>, response: Response<DeleteEventResponse>) {
+                if (response.isSuccessful) {
+                    Utils.log("Event successfully deleted (now creating the edited version)")
+                    TcaDb.getInstance(this@CreateEventActivity).calendarDao().delete(eventId)
+                    eventColorController.removeEventColor(eventId)
+                    createEvent()
+                } else {
+                    Utils.showToast(this@CreateEventActivity, R.string.error_unknown)
                 }
+            }
 
-                override fun onFailure(
-                    call: Call<DeleteEventResponse>,
-                    t: Throwable
-                ) {
-                    Utils.log(t)
-                    displayErrorMessage(t)
-                }
-            })
+            override fun onFailure(call: Call<DeleteEventResponse>, t: Throwable) {
+                Utils.log(t)
+                displayErrorMessage(t)
+            }
+        })
     }
 
     private fun displayErrorMessage(throwable: Throwable) {
@@ -541,7 +502,6 @@ class CreateEventActivity : ActivityForAccessingTumOnline<CreateEventResponse>(R
         finish()
     }
 
-    @Deprecated("Deprecated in Java")
     override fun onBackPressed() {
         hideKeyboard()
 

app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/WidgetCalendarItem.kt

@@ -10,24 +10,16 @@ import org.joda.time.DateTime
 /**
  * A class to represent events for the integrated WeekView calendar
  */
-data class WidgetCalendarItem(
-    val id: String,
-    val title: String,
-    val startTime: DateTime,
-    val endTime: DateTime,
-    val location: String
-) : WeekViewDisplayable<WidgetCalendarItem> {
+data class WidgetCalendarItem(val id: String, val title: String, val startTime: DateTime, val endTime: DateTime, val location: String) : WeekViewDisplayable<WidgetCalendarItem> {
 
     var color: Int = 0
 
     var isFirstOnDay: Boolean = false
 
     override fun toWeekViewEvent(): WeekViewEvent<WidgetCalendarItem> {
-        val style = WeekViewEvent.Style.Builder()
-            .setBackgroundColor(color)
-            .build()
+        val style = WeekViewEvent.Style.Builder().setBackgroundColor(color).build()
 
-        return WeekViewEvent.Builder<WidgetCalendarItem>(this)
+        return WeekViewEvent.Builder(this)
             .setId(id.toLong())
             .setTitle(title)
             .setStartTime(startTime.toGregorianCalendar())

app/src/main/java/de/tum/in/tumcampusapp/component/tumui/calendar/model/CalendarItem.kt

@@ -112,9 +112,7 @@ data class CalendarItem(
     }
 
     fun isSameEventButForLocation(other: CalendarItem): Boolean {
-        return title == other.title &&
-            dtstart == other.dtstart &&
-            dtend == other.dtend
+        return title == other.title && dtstart == other.dtstart && dtend == other.dtend
     }
 
     override fun toWeekViewEvent(): WeekViewEvent<CalendarItem> {
@@ -132,7 +130,7 @@ data class CalendarItem(
             .setBorderColor(color)
             .build()
 
-        return WeekViewEvent.Builder<CalendarItem>(this)
+        return WeekViewEvent.Builder(this)
             .setId(nr.toLong())
             .setTitle(title)
             .setStartTime(eventStart.toGregorianCalendar())

app/src/main/java/de/tum/in/tumcampusapp/component/tumui/grades/ExamListAdapter.kt

@@ -182,7 +182,7 @@ class ExamListAdapter(context: Context, results: List<Exam>, gradesFragment: Gra
     private fun initCheckBoxUsedInAverage(exam: Exam, holder: ViewHolder) {
         holder.checkBoxUseGradeForAverage.isChecked = exam.gradeUsedInAverage
         adaptUIToCheckboxStatus(holder, exam)
-        holder.checkBoxUseGradeForAverage.setOnClickListener() {
+        holder.checkBoxUseGradeForAverage.setOnClickListener {
             exam.gradeUsedInAverage = holder.checkBoxUseGradeForAverage.isChecked
             adaptUIToCheckboxStatus(holder, exam)
             localGradesFragment.storeExamListInSharedPreferences()

app/src/main/java/de/tum/in/tumcampusapp/component/tumui/grades/GradesFragment.kt

@@ -381,7 +381,7 @@ class GradesFragment : FragmentForAccessingTumOnline<ExamList>(
                     val desc = Description()
                     desc.text = context.getString(R.string.grade_percentages)
 
-                    desc.setTextSize(11f)
+                    desc.textSize = 11f
                     desc.setPosition(540F, 50F)
                     description = desc
                     axisRight.disableGridDashedLine()

app/src/main/java/de/tum/in/tumcampusapp/component/ui/cafeteria/details/CafeteriaDetailsSectionFragment.kt

@@ -7,13 +7,11 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
-import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.zhuinden.fragmentviewbindingdelegatekt.viewBinding
 import de.tum.`in`.tumcampusapp.R
-import de.tum.`in`.tumcampusapp.component.ui.cafeteria.model.CafeteriaMenu
 import de.tum.`in`.tumcampusapp.databinding.FragmentCafeteriadetailsSectionBinding
 import de.tum.`in`.tumcampusapp.di.ViewModelFactory
 import de.tum.`in`.tumcampusapp.di.injector
@@ -93,9 +91,8 @@ class CafeteriaDetailsSectionFragment : Fragment() {
             menusRecyclerView.adapter = adapter
 
             cafeteriaViewModel.cafeteriaMenus.observe(
-                viewLifecycleOwner,
-                Observer<List<CafeteriaMenu>> { adapter.update(it) }
-            )
+                viewLifecycleOwner
+            ) { adapter.update(it) }
             cafeteriaViewModel.fetchCafeteriaMenus(cafeteriaId, menuDate)
         }
     }

app/src/main/java/de/tum/in/tumcampusapp/component/ui/news/NewsNotificationProvider.kt

@@ -27,8 +27,7 @@ class NewsNotificationProvider(
 
     override fun buildNotification(): AppNotification {
         val summaryTitle = context.getString(R.string.news)
-        val summaryText = context.getString(R.string.new_items_format_string, newsItems.size)
-
+        val summaryText = context.resources.getQuantityString(R.plurals.new_items_format_string, newsItems.size, newsItems.size)
         val inboxStyle = NotificationCompat.InboxStyle()
         newsItems.forEach { inboxStyle.addLine(it.title) }
 

app/src/main/java/de/tum/in/tumcampusapp/component/ui/news/NewsViewHolder.kt

@@ -29,13 +29,13 @@ class NewsViewHolder(
     private val showOptionsButton: Boolean = true
 ) : CardViewHolder(itemView, interactionListener) {
 
-    private val optionsButtonGroup: Group by lazy { itemView.findViewById<Group>(R.id.cardMoreIconGroup) }
-    private val imageView: ImageView? by lazy { itemView.findViewById<ImageView>(R.id.news_img) }
-    private val titleTextView: TextView? by lazy { itemView.findViewById<TextView>(R.id.news_title) }
-    private val dateTextView: TextView by lazy { itemView.findViewById<TextView>(R.id.news_src_date) }
-    private val sourceTextView: TextView by lazy { itemView.findViewById<TextView>(R.id.news_src_title) }
-    private val ticketsIcon: ImageView? by lazy { itemView.findViewById<ImageView>(R.id.tickets_icon) }
-    private val ticketsTextView: TextView? by lazy { itemView.findViewById<TextView>(R.id.tickets_available) }
+    private val optionsButtonGroup: Group by lazy { itemView.findViewById(R.id.cardMoreIconGroup) }
+    private val imageView: ImageView? by lazy { itemView.findViewById(R.id.news_img) }
+    private val titleTextView: TextView? by lazy { itemView.findViewById(R.id.news_title) }
+    private val dateTextView: TextView by lazy { itemView.findViewById(R.id.news_src_date) }
+    private val sourceTextView: TextView by lazy { itemView.findViewById(R.id.news_src_title) }
+    private val ticketsIcon: ImageView? by lazy { itemView.findViewById(R.id.tickets_icon) }
+    private val ticketsTextView: TextView? by lazy { itemView.findViewById(R.id.tickets_available) }
 
     fun bind(newsItem: News, newsSource: NewsSources, hasEvent: Boolean) = with(itemView) {
         val card = if (newsItem.isFilm) FilmCard(context, newsItem) else NewsCard(context = context, news = newsItem)