Merge branch 'android-studio-lint'

47 files changed, 125 insertions, 688 deletions

diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/applist/ListItemData.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/applist/ListItemData.kt
deleted file mode 100644
index 613fe49e8f..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/applist/ListItemData.kt
+++ /dev/null
@@ -1,64 +0,0 @@
-package net.mullvad.mullvadvpn.applist
-
-import androidx.annotation.DrawableRes
-import androidx.annotation.IntDef
-import androidx.annotation.StringRes
-import net.mullvad.mullvadvpn.ui.widget.WidgetState
-
-data class ListItemData
-private constructor(
-    val identifier: String,
-    val text: String? = null,
-    @StringRes val textRes: Int? = null,
-    @DrawableRes val iconRes: Int?,
-    val isSelected: Boolean,
-    @ItemType val type: Int,
-    val widget: WidgetState? = null,
-    val action: ItemAction? = null
-) {
-
-    @Retention @IntDef(DIVIDER, PLAIN, ACTION) annotation class ItemType
-
-    class Builder(private val identifier: String) {
-        var text: String? = null
-
-        @StringRes var textRes: Int? = null
-
-        @DrawableRes var iconRes: Int? = null
-        var isSelected: Boolean = false
-
-        @ItemType var type: Int = 0
-        var widget: WidgetState? = null
-        var action: ItemAction? = null
-
-        fun build(): ListItemData {
-            if ((this.text == null && this.textRes == null) && type > PROGRESS)
-                throw IllegalArgumentException("ListItem should be configured with text")
-
-            return ListItemData(
-                this.identifier,
-                this.text,
-                this.textRes,
-                this.iconRes,
-                this.isSelected,
-                this.type,
-                this.widget,
-                this.action
-            )
-        }
-    }
-
-    data class ItemAction(val identifier: String)
-
-    companion object {
-        const val DIVIDER = 0
-        const val PROGRESS = 1
-        const val PLAIN = 2
-        const val ACTION = 3
-        const val DOUBLE_ACTION = 4
-        const val APPLICATION = 5
-
-        fun build(identifier: String, setUp: Builder.() -> Unit): ListItemData =
-            Builder(identifier).also(setUp).build()
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/applist/ViewIntent.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/applist/ViewIntent.kt
deleted file mode 100644
index 4469bd00ef..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/applist/ViewIntent.kt
+++ /dev/null
@@ -1,10 +0,0 @@
-package net.mullvad.mullvadvpn.applist
-
-sealed class ViewIntent {
-    // In future we will have search intent
-    data class ChangeApplicationGroup(val item: ListItemData) : ViewIntent()
-
-    object ViewIsReady : ViewIntent()
-
-    data class ShowSystemApps(internal val show: Boolean) : ViewIntent()
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/button/ConnectionButton.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/button/ConnectionButton.kt
index 06b4074730..7852159247 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/button/ConnectionButton.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/button/ConnectionButton.kt
@@ -100,7 +100,7 @@ fun ConnectionButton(
 
 @Preview
 @Composable
-fun ConnectionButton() {
+fun PreviewConnectionButton() {
     AppTheme {
         ConnectionButton(
             text = "Disconnect",
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/cell/SplitTunnelingCell.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/cell/SplitTunnelingCell.kt
index dd5e075d70..72cce59124 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/cell/SplitTunnelingCell.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/cell/SplitTunnelingCell.kt
@@ -29,7 +29,6 @@ import net.mullvad.mullvadvpn.R
 import net.mullvad.mullvadvpn.lib.theme.AppTheme
 import net.mullvad.mullvadvpn.lib.theme.Dimens
 import net.mullvad.mullvadvpn.lib.theme.typeface.listItemText
-import org.koin.androidx.compose.get
 
 @Preview
 @Composable
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/CollapsingToolbarScaffold.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/CollapsingToolbarScaffold.kt
index f4b81826bc..0856fc196f 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/CollapsingToolbarScaffold.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/CollapsingToolbarScaffold.kt
@@ -8,6 +8,7 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -71,7 +72,7 @@ fun CollapsingToolbarScaffold(
         enabled = isEnabledWhenCollapsable && isCollapsable,
         toolbar = { toolbar() }
     ) {
-        var bodyHeight by remember { mutableStateOf(0) }
+        var bodyHeight by remember { mutableIntStateOf(0) }
 
         BoxWithConstraints(
             modifier =
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/Text.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/Text.kt
index 79112f58ff..39e3382a09 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/Text.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/component/Text.kt
@@ -4,6 +4,7 @@ import androidx.compose.material3.LocalTextStyle
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableFloatStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -71,7 +72,7 @@ fun AutoResizeText(
     style: TextStyle = LocalTextStyle.current,
     maxLines: Int = Int.MAX_VALUE,
 ) {
-    var adjustedFontSize by remember { mutableStateOf(maxTextSize.value) }
+    var adjustedFontSize by remember { mutableFloatStateOf(maxTextSize.value) }
     var isReadyToDraw by remember { mutableStateOf(false) }
 
     Text(
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/dialog/ChangelogDialog.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/dialog/ChangelogDialog.kt
index df31400ca2..301ee649b1 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/dialog/ChangelogDialog.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/dialog/ChangelogDialog.kt
@@ -28,7 +28,7 @@ import net.mullvad.mullvadvpn.lib.theme.Dimens
 @Composable
 fun ChangelogDialog(changesList: List<String>, version: String, onDismiss: () -> Unit) {
     AlertDialog(
-        onDismissRequest = { onDismiss() },
+        onDismissRequest = onDismiss,
         title = {
             Text(
                 text = version,
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/extensions/ResourcesExtensions.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/extensions/ResourcesExtensions.kt
index dca2a6aeb9..89d985a408 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/extensions/ResourcesExtensions.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/extensions/ResourcesExtensions.kt
@@ -23,18 +23,14 @@ private fun getExpiryQuantityString(
         val remainingTimeInfo =
             remainingTime.toPeriodTo(accountExpiry, PeriodType.yearMonthDayTime())
 
-        if (remainingTimeInfo.years > 0) {
-            return getRemainingText(resources, R.plurals.years_left, remainingTimeInfo.years)
+        return if (remainingTimeInfo.years > 0) {
+            getRemainingText(resources, R.plurals.years_left, remainingTimeInfo.years)
         } else if (remainingTimeInfo.months >= 3) {
-            return getRemainingText(resources, R.plurals.months_left, remainingTimeInfo.months)
+            getRemainingText(resources, R.plurals.months_left, remainingTimeInfo.months)
         } else if (remainingTimeInfo.months > 0 || remainingTimeInfo.days >= 1) {
-            return getRemainingText(
-                resources,
-                R.plurals.days_left,
-                remainingTime.standardDays.toInt()
-            )
+            getRemainingText(resources, R.plurals.days_left, remainingTime.standardDays.toInt())
         } else {
-            return resources.getString(R.string.less_than_a_day_left)
+            resources.getString(R.string.less_than_a_day_left)
         }
     }
 }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/AccountScreen.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/AccountScreen.kt
index 863d938506..df7d225deb 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/AccountScreen.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/AccountScreen.kt
@@ -85,7 +85,7 @@ fun AccountScreen(
                 )
             CollapsingTopBar(
                 backgroundColor = MaterialTheme.colorScheme.secondary,
-                onBackClicked = { onBackClick() },
+                onBackClicked = onBackClick,
                 title = stringResource(id = R.string.settings_account),
                 progress = progress,
                 modifier = scaffoldModifier,
@@ -153,7 +153,7 @@ fun AccountScreen(
             if (BuildConfig.BUILD_TYPE != BuildTypes.RELEASE) {
                 ActionButton(
                     text = stringResource(id = R.string.manage_account),
-                    onClick = { onManageAccountClick() },
+                    onClick = onManageAccountClick,
                     modifier =
                         Modifier.padding(
                             start = Dimens.sideMargin,
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SelectLocationUiState.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SelectLocationUiState.kt
index 9d230a98fe..fece45f0aa 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SelectLocationUiState.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SelectLocationUiState.kt
@@ -4,7 +4,7 @@ import net.mullvad.mullvadvpn.relaylist.RelayCountry
 import net.mullvad.mullvadvpn.relaylist.RelayItem
 
 sealed interface SelectLocationUiState {
-    object Loading : SelectLocationUiState
+    data object Loading : SelectLocationUiState
 
     data class ShowData(val countries: List<RelayCountry>, val selectedRelay: RelayItem?) :
         SelectLocationUiState
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SplitTunnelingUiState.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SplitTunnelingUiState.kt
index 1ebb8fb379..7752293516 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SplitTunnelingUiState.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/SplitTunnelingUiState.kt
@@ -3,7 +3,7 @@ package net.mullvad.mullvadvpn.compose.state
 import net.mullvad.mullvadvpn.applist.AppData
 
 sealed interface SplitTunnelingUiState {
-    object Loading : SplitTunnelingUiState
+    data object Loading : SplitTunnelingUiState
 
     data class ShowAppList(
         val excludedApps: List<AppData> = emptyList(),
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/util/RememberPrevious.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/util/RememberPrevious.kt
index ef47f61472..6782e0ab55 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/util/RememberPrevious.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/util/RememberPrevious.kt
@@ -31,7 +31,7 @@ fun <T> rememberPrevious(
 private fun <T> rememberRef(): MutableState<T?> {
     // for some reason it always recreated the value with vararg keys,
     // leaving out the keys as a parameter for remember for now
-    return remember() {
+    return remember {
         object : MutableState<T?> {
             override var value: T? = null
 
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/dataproxy/MullvadProblemReport.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/dataproxy/MullvadProblemReport.kt
index 7104deb686..69fd7275e7 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/dataproxy/MullvadProblemReport.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/dataproxy/MullvadProblemReport.kt
@@ -15,13 +15,13 @@ const val PROBLEM_REPORT_FILE = "problem_report.txt"
 
 class MullvadProblemReport {
     private sealed class Command {
-        class Collect() : Command()
+        data object Collect : Command()
 
         class Load(val logs: CompletableDeferred<String>) : Command()
 
         class Send(val result: CompletableDeferred<Boolean>) : Command()
 
-        class Delete() : Command()
+        data object Delete : Command()
     }
 
     val logDirectory = CompletableDeferred<File>()
@@ -44,7 +44,7 @@ class MullvadProblemReport {
     }
 
     fun collect() {
-        commandChannel.trySendBlocking(Command.Collect())
+        commandChannel.trySendBlocking(Command.Collect)
     }
 
     suspend fun load(): String {
@@ -64,16 +64,15 @@ class MullvadProblemReport {
     }
 
     fun deleteReportFile() {
-        commandChannel.trySendBlocking(Command.Delete())
+        commandChannel.trySendBlocking(Command.Delete)
     }
 
     private fun spawnActor() =
         GlobalScope.actor<Command>(Dispatchers.Default, Channel.UNLIMITED) {
             try {
                 while (true) {
-                    val command = channel.receive()
 
-                    when (command) {
+                    when (val command = channel.receive()) {
                         is Command.Collect -> doCollect()
                         is Command.Load -> command.logs.complete(doLoad())
                         is Command.Send -> command.result.complete(doSend())
@@ -97,10 +96,10 @@ class MullvadProblemReport {
             doCollect()
         }
 
-        if (isCollected) {
-            return problemReportPath.await().readText()
+        return if (isCollected) {
+            problemReportPath.await().readText()
         } else {
-            return "Failed to collect logs for problem report"
+            "Failed to collect logs for problem report"
         }
     }
 
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/GetItemResult.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/GetItemResult.kt
deleted file mode 100644
index edbaaf39d1..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/GetItemResult.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package net.mullvad.mullvadvpn.relaylist
-
-sealed class GetItemResult {
-    data class Item(val item: RelayItem) : GetItemResult()
-
-    data class Count(val count: Int) : GetItemResult()
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCity.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCity.kt
index 4817b401bf..d1a3332a78 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCity.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCity.kt
@@ -16,31 +16,4 @@ data class RelayCity(
 
     override val hasChildren
         get() = relays.isNotEmpty()
-
-    fun getItem(position: Int): GetItemResult {
-        if (position == 0) {
-            return GetItemResult.Item(this)
-        }
-
-        if (!expanded) {
-            return GetItemResult.Count(1)
-        }
-
-        val offset = position - 1
-        val relayCount = relays.size
-
-        return if (offset >= relayCount) {
-            GetItemResult.Count(1 + relayCount)
-        } else {
-            GetItemResult.Item(relays[offset])
-        }
-    }
-
-    fun getItemCount(): Int {
-        return if (expanded) {
-            1 + relays.size
-        } else {
-            1
-        }
-    }
 }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCountry.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCountry.kt
index e9487c7b4c..d418fd3a4a 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCountry.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayCountry.kt
@@ -16,28 +16,4 @@ data class RelayCountry(
 
     override val hasChildren
         get() = cities.isNotEmpty()
-
-    fun getItem(position: Int): GetItemResult {
-        if (position == 0) {
-            return GetItemResult.Item(this)
-        }
-
-        var itemCount = 1
-        var remaining = position - 1
-
-        if (expanded) {
-            for (city in cities) {
-
-                when (val itemOrCount = city.getItem(remaining)) {
-                    is GetItemResult.Item -> return itemOrCount
-                    is GetItemResult.Count -> {
-                        remaining -= itemOrCount.count
-                        itemCount += itemOrCount.count
-                    }
-                }
-            }
-        }
-
-        return GetItemResult.Count(itemCount)
-    }
 }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayListAdapterPosition.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayListAdapterPosition.kt
deleted file mode 100644
index 09dfafebc8..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/relaylist/RelayListAdapterPosition.kt
+++ /dev/null
@@ -1,3 +0,0 @@
-package net.mullvad.mullvadvpn.relaylist
-
-data class RelayListAdapterPosition(var position: Int)
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/BlockingController.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/BlockingController.kt
deleted file mode 100644
index 4dd53fa937..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/BlockingController.kt
+++ /dev/null
@@ -1,39 +0,0 @@
-package net.mullvad.mullvadvpn.ui
-
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.launch
-
-class BlockingController(val blockableView: BlockableView) {
-    var job: Job? = null
-    var innerJob: Job? = null
-
-    fun action() {
-        if (!(job?.isActive ?: false)) {
-            job =
-                GlobalScope.launch(Dispatchers.Main) {
-                    blockableView.setEnabled(false)
-                    innerJob = blockableView.onClick()
-                    innerJob?.join()
-                    blockableView.setEnabled(true)
-                }
-        }
-    }
-
-    fun onPause() {
-        innerJob?.cancel()
-        job?.cancel()
-        blockableView.setEnabled(true)
-    }
-
-    fun onDestroy() {
-        onPause()
-    }
-}
-
-interface BlockableView {
-    fun setEnabled(enabled: Boolean)
-
-    fun onClick(): Job
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CollapsibleTitleController.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CollapsibleTitleController.kt
index 658fd3fed3..1c37945602 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CollapsibleTitleController.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CollapsibleTitleController.kt
@@ -46,16 +46,15 @@ class CollapsibleTitleController(val parentView: View, scrollAreaId: Int = R.id.
     private val xOffsetInterpolation = LinearInterpolation()
     private val yOffsetInterpolation = LinearInterpolation()
 
-    private val collapsedTitleLayoutListener: LayoutListener =
-        LayoutListener() { collapsedTitle ->
-            val (x, y) = calculateViewCoordinates(collapsedTitle)
+    private val collapsedTitleLayoutListener: LayoutListener = LayoutListener { collapsedTitle ->
+        val (x, y) = calculateViewCoordinates(collapsedTitle)
 
-            collapsedTitleHeight = collapsedTitle.height.toFloat()
+        collapsedTitleHeight = collapsedTitle.height.toFloat()
 
-            scaleInterpolation.end = collapsedTitleHeight / maxOf(1.0f, titleHeight)
-            xOffsetInterpolation.end = x
-            yOffsetInterpolation.end = y
-        }
+        scaleInterpolation.end = collapsedTitleHeight / maxOf(1.0f, titleHeight)
+        xOffsetInterpolation.end = x
+        yOffsetInterpolation.end = y
+    }
 
     private val collapsedTitleView =
         parentView.findViewById<View>(R.id.collapsed_title).apply {
@@ -63,37 +62,35 @@ class CollapsibleTitleController(val parentView: View, scrollAreaId: Int = R.id.
             visibility = View.INVISIBLE
         }
 
-    private val expandedTitleLayoutListener: LayoutListener =
-        LayoutListener() { expandedTitle ->
-            val (x, y) = calculateViewCoordinates(expandedTitle)
+    private val expandedTitleLayoutListener: LayoutListener = LayoutListener { expandedTitle ->
+        val (x, y) = calculateViewCoordinates(expandedTitle)
 
-            val expandedTitleMarginTop =
-                when (val layoutParams = expandedTitle.layoutParams) {
-                    is MarginLayoutParams -> layoutParams.topMargin
-                    else -> 0
-                }
+        val expandedTitleMarginTop =
+            when (val layoutParams = expandedTitle.layoutParams) {
+                is MarginLayoutParams -> layoutParams.topMargin
+                else -> 0
+            }
 
-            expandedTitleHeight = expandedTitle.height.toFloat()
+        expandedTitleHeight = expandedTitle.height.toFloat()
 
-            scaleInterpolation.start = expandedTitleHeight / maxOf(1.0f, titleHeight)
-            xOffsetInterpolation.start = x
-            yOffsetInterpolation.start = y
+        scaleInterpolation.start = expandedTitleHeight / maxOf(1.0f, titleHeight)
+        xOffsetInterpolation.start = x
+        yOffsetInterpolation.start = y
 
-            scrollInterpolation.end = expandedTitleHeight + expandedTitleMarginTop
-        }
+        scrollInterpolation.end = expandedTitleHeight + expandedTitleMarginTop
+    }
 
-    private val titleLayoutListener: LayoutListener =
-        LayoutListener() { title ->
-            val (x, y) = calculateViewCoordinates(title)
+    private val titleLayoutListener: LayoutListener = LayoutListener { title ->
+        val (x, y) = calculateViewCoordinates(title)
 
-            titleWidth = title.width.toFloat()
-            titleHeight = title.height.toFloat()
+        titleWidth = title.width.toFloat()
+        titleHeight = title.height.toFloat()
 
-            scaleInterpolation.start = expandedTitleHeight / maxOf(1.0f, titleHeight)
-            scaleInterpolation.end = collapsedTitleHeight / maxOf(1.0f, titleHeight)
-            xOffsetInterpolation.reference = x
-            yOffsetInterpolation.reference = y
-        }
+        scaleInterpolation.start = expandedTitleHeight / maxOf(1.0f, titleHeight)
+        scaleInterpolation.end = collapsedTitleHeight / maxOf(1.0f, titleHeight)
+        xOffsetInterpolation.reference = x
+        yOffsetInterpolation.reference = y
+    }
 
     private val titleView =
         parentView.findViewById<View>(R.id.title).apply {
@@ -104,8 +101,9 @@ class CollapsibleTitleController(val parentView: View, scrollAreaId: Int = R.id.
             pivotY = 0.0f
         }
 
-    private val scrollAreaLayoutListener: LayoutListener =
-        LayoutListener() { scrollOffset = scrollArea.verticalScrollOffset.toFloat() }
+    private val scrollAreaLayoutListener: LayoutListener = LayoutListener {
+        scrollOffset = scrollArea.verticalScrollOffset.toFloat()
+    }
 
     private val scrollArea =
         parentView.findViewById<View>(scrollAreaId).let { view ->
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CustomTransformationMethod.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CustomTransformationMethod.kt
index 083258c62d..451c51fa3f 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CustomTransformationMethod.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/CustomTransformationMethod.kt
@@ -10,7 +10,7 @@ private const val DOT_CHAR = '\u2022'
 private const val EMPTY_STRING = ""
 private const val SPACE_CHAR = ' '
 
-class GroupedTransformationMethod() : TransformationMethod {
+class GroupedTransformationMethod : TransformationMethod {
     override fun getTransformation(source: CharSequence?, view: View?): CharSequence {
         return source?.groupWithSpaces() ?: EMPTY_STRING
     }
@@ -26,7 +26,7 @@ class GroupedTransformationMethod() : TransformationMethod {
     }
 }
 
-class GroupedPasswordTransformationMethod() : PasswordTransformationMethod() {
+class GroupedPasswordTransformationMethod : PasswordTransformationMethod() {
     override fun getTransformation(source: CharSequence?, view: View?): CharSequence {
         return if (source != null && view != null) {
             super.getTransformation(source, view)
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/ListItemListener.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/ListItemListener.kt
deleted file mode 100644
index 07c5520d34..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/ListItemListener.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package net.mullvad.mullvadvpn.ui
-
-import net.mullvad.mullvadvpn.applist.ListItemData
-
-interface ListItemListener {
-    fun onItemAction(item: ListItemData)
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/LoginFragment.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/LoginFragment.kt
index c02ed0b652..7e298e3f73 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/LoginFragment.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/LoginFragment.kt
@@ -272,7 +272,7 @@ class LoginFragment : BaseFragment(), NavigationBarPainter {
 
     private fun loginFailure(description: String? = "") {
         title.setText(R.string.login_fail_title)
-        subtitle.setText(description)
+        subtitle.text = description
 
         loggingInStatus.visibility = View.GONE
         loginFailStatus.visibility = View.VISIBLE
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/OutOfTimeFragment.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/OutOfTimeFragment.kt
index 9b5eb395ad..1a59f19ff7 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/OutOfTimeFragment.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/OutOfTimeFragment.kt
@@ -96,11 +96,11 @@ class OutOfTimeFragment : BaseFragment() {
                 newAccount = false
 
                 setOnClickAction("openAccountPageInBrowser", jobTracker) {
-                    setEnabled(false)
+                    isEnabled = false
                     serviceConnectionManager.authTokenCache()?.fetchAuthToken()?.let { token ->
                         context.openAccountPageInBrowser(token)
                     }
-                    setEnabled(true)
+                    isEnabled = true
                 }
 
                 isEnabled = true
@@ -170,10 +170,10 @@ class OutOfTimeFragment : BaseFragment() {
 
         disconnectButton.apply {
             if (showButton) {
-                setEnabled(true)
+                isEnabled = true
                 visibility = View.VISIBLE
             } else {
-                setEnabled(false)
+                isEnabled = false
                 visibility = View.GONE
             }
         }
@@ -182,17 +182,17 @@ class OutOfTimeFragment : BaseFragment() {
     private fun updateBuyButtons() {
         val currentState = tunnelState
         val hasConnectivity = currentState is TunnelState.Disconnected
-        sitePaymentButton.setEnabled(hasConnectivity)
+        sitePaymentButton.isEnabled = hasConnectivity
 
         val isOffline =
             currentState is TunnelState.Error &&
                 currentState.errorState.cause is ErrorStateCause.IsOffline
-        redeemButton.setEnabled(!isOffline)
+        redeemButton.isEnabled = !isOffline
     }
 
     private fun checkExpiry(maybeExpiry: DateTime?) {
         maybeExpiry?.let { expiry ->
-            if (expiry.isAfterNow()) {
+            if (expiry.isAfterNow) {
                 jobTracker.newUiJob("advanceToConnectScreen") { advanceToConnectScreen() }
             }
         }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/ProblemReportFragment.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/ProblemReportFragment.kt
index 4d5ca3c9b5..b30b5713fb 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/ProblemReportFragment.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/ProblemReportFragment.kt
@@ -280,7 +280,7 @@ class ProblemReportFragment : BaseFragment() {
     }
 
     private fun setSendButtonEnabled(enabled: Boolean) {
-        sendButton.setEnabled(enabled)
+        sendButton.isEnabled = enabled
         sendButton.alpha = if (enabled) 1.0F else 0.5F
     }
 
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/RedeemVoucherDialogFragment.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/RedeemVoucherDialogFragment.kt
index 59318a8268..46472ea6cc 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/RedeemVoucherDialogFragment.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/fragment/RedeemVoucherDialogFragment.kt
@@ -88,7 +88,7 @@ class RedeemVoucherDialogFragment : DialogFragment() {
 
         redeemButton =
             view.findViewById<Button>(R.id.redeem).apply {
-                setEnabled(false)
+                isEnabled = false
 
                 setOnClickAction("action", jobTracker) { submitVoucher() }
             }
@@ -130,7 +130,7 @@ class RedeemVoucherDialogFragment : DialogFragment() {
     }
 
     private fun updateRedeemButton() {
-        redeemButton?.setEnabled(voucherInputIsValid && voucherRedeemer != null)
+        redeemButton?.isEnabled = voucherInputIsValid && voucherRedeemer != null
     }
 
     private suspend fun submitVoucher() {
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/CustomDns.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/CustomDns.kt
index b24cda9213..bfad798e08 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/CustomDns.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/CustomDns.kt
@@ -1,83 +1,13 @@
 package net.mullvad.mullvadvpn.ui.serviceconnection
 
 import android.os.Messenger
-import java.net.InetAddress
 import net.mullvad.mullvadvpn.lib.ipc.Request
 import net.mullvad.mullvadvpn.lib.ipc.extensions.trySendRequest
 import net.mullvad.mullvadvpn.model.DnsOptions
-import net.mullvad.mullvadvpn.model.DnsState
-import net.mullvad.talpid.util.EventNotifier
 
-class CustomDns(private val connection: Messenger, private val settingsListener: SettingsListener) {
-    @Deprecated(
-        message = "Will soon be removed in favor of onDnsOptionsChanged.",
-        replaceWith = ReplaceWith("onDnsOptionsChanged")
-    )
-    val onEnabledChanged = EventNotifier(false)
-    @Deprecated(
-        message = "Will soon be removed in favor of onDnsOptionsChanged.",
-        replaceWith = ReplaceWith("onDnsOptionsChanged")
-    )
-    val onDnsServersChanged = EventNotifier<List<InetAddress>>(emptyList())
-    val onDnsOptionsChanged = EventNotifier<DnsOptions?>(null)
-
-    init {
-        settingsListener.dnsOptionsNotifier.subscribe(this) { maybeDnsOptions ->
-            maybeDnsOptions?.let { dnsOptions ->
-                synchronized(this) {
-                    onEnabledChanged.notifyIfChanged(dnsOptions.state == DnsState.Custom)
-                    onDnsServersChanged.notifyIfChanged(dnsOptions.customOptions.addresses)
-                    onDnsOptionsChanged.notifyIfChanged(dnsOptions)
-                }
-            }
-        }
-    }
-
-    fun enable() {
-        connection.send(Request.SetEnableCustomDns(true).message)
-    }
-
-    fun disable() {
-        connection.send(Request.SetEnableCustomDns(false).message)
-    }
-
-    fun isCustomDnsEnabled(): Boolean {
-        return onEnabledChanged.latestEvent ?: false
-    }
-
-    fun addDnsServer(server: InetAddress): Boolean {
-        val didntAlreadyHaveServer = !onDnsServersChanged.latestEvent.contains(server)
-
-        connection.send(Request.AddCustomDnsServer(server).message)
-
-        return didntAlreadyHaveServer
-    }
-
-    fun replaceDnsServer(oldServer: InetAddress, newServer: InetAddress): Boolean {
-        synchronized(this) {
-            val dnsServers = onDnsServersChanged.latestEvent
-            val containsOldServer = dnsServers.contains(oldServer)
-            val replacementIsValid = oldServer == newServer || !dnsServers.contains(newServer)
-
-            connection.send(Request.ReplaceCustomDnsServer(oldServer, newServer).message)
-
-            return containsOldServer && replacementIsValid
-        }
-    }
-
-    fun removeDnsServer(server: InetAddress) {
-        connection.send(Request.RemoveCustomDnsServer(server).message)
-    }
+class CustomDns(private val connection: Messenger) {
 
     fun setDnsOptions(dnsOptions: DnsOptions) {
         connection.trySendRequest(Request.SetDnsOptions(dnsOptions), false)
     }
-
-    fun onDestroy() {
-        onEnabledChanged.unsubscribeAll()
-        onDnsServersChanged.unsubscribeAll()
-        onDnsOptionsChanged.unsubscribeAll()
-
-        settingsListener.dnsOptionsNotifier.unsubscribe(this)
-    }
 }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/ServiceConnectionContainer.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/ServiceConnectionContainer.kt
index 1ca0d6642c..6dbea7a517 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/ServiceConnectionContainer.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/ServiceConnectionContainer.kt
@@ -8,7 +8,6 @@ import net.mullvad.mullvadvpn.lib.ipc.DispatchingHandler
 import net.mullvad.mullvadvpn.lib.ipc.Event
 import net.mullvad.mullvadvpn.lib.ipc.Request
 import org.koin.core.component.KoinComponent
-import org.koin.core.component.get
 
 // Container of classes that communicate with the service through an active connection
 //
@@ -34,7 +33,7 @@ class ServiceConnectionContainer(
     val vpnPermission = VpnPermission(connection, dispatcher)
 
     val appVersionInfoCache = AppVersionInfoCache(dispatcher, settingsListener)
-    val customDns = CustomDns(connection, settingsListener)
+    val customDns = CustomDns(connection)
     var relayListListener = RelayListListener(connection, dispatcher, settingsListener)
 
     private var listenerId: Int? = null
@@ -62,7 +61,6 @@ class ServiceConnectionContainer(
         voucherRedeemer.onDestroy()
 
         appVersionInfoCache.onDestroy()
-        customDns.onDestroy()
         relayListListener.onDestroy()
     }
 
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/SettingsListener.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/SettingsListener.kt
index 039b293d69..d996c432ad 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/SettingsListener.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/serviceconnection/SettingsListener.kt
@@ -4,7 +4,6 @@ import android.os.Messenger
 import net.mullvad.mullvadvpn.lib.ipc.Event
 import net.mullvad.mullvadvpn.lib.ipc.EventDispatcher
 import net.mullvad.mullvadvpn.lib.ipc.Request
-import net.mullvad.mullvadvpn.model.DnsOptions
 import net.mullvad.mullvadvpn.model.ObfuscationSettings
 import net.mullvad.mullvadvpn.model.QuantumResistantState
 import net.mullvad.mullvadvpn.model.RelaySettings
@@ -12,7 +11,6 @@ import net.mullvad.mullvadvpn.model.Settings
 import net.mullvad.talpid.util.EventNotifier
 
 class SettingsListener(private val connection: Messenger, eventDispatcher: EventDispatcher) {
-    val dnsOptionsNotifier = EventNotifier<DnsOptions?>(null)
     val relaySettingsNotifier = EventNotifier<RelaySettings?>(null)
     val settingsNotifier = EventNotifier<Settings?>(null)
 
@@ -55,7 +53,6 @@ class SettingsListener(private val connection: Messenger, eventDispatcher: Event
     }
 
     fun onDestroy() {
-        dnsOptionsNotifier.unsubscribeAll()
         relaySettingsNotifier.unsubscribeAll()
         settingsNotifier.unsubscribeAll()
     }
@@ -65,10 +62,6 @@ class SettingsListener(private val connection: Messenger, eventDispatcher: Event
     }
 
     private fun handleNewSettings(newSettings: Settings) {
-        if (settings?.tunnelOptions?.dnsOptions != newSettings.tunnelOptions.dnsOptions) {
-            dnsOptionsNotifier.notify(newSettings.tunnelOptions.dnsOptions)
-        }
-
         if (settings?.relaySettings != newSettings.relaySettings) {
             relaySettingsNotifier.notify(newSettings.relaySettings)
         }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/AccountInput.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/AccountInput.kt
index 32e81a25e4..11759d469e 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/AccountInput.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/AccountInput.kt
@@ -120,8 +120,8 @@ class AccountInput : LinearLayout {
     private fun initialState() {
         input.apply {
             setTextColor(enabledTextColor)
-            setEnabled(true)
-            setFocusableInTouchMode(true)
+            isEnabled = true
+            isFocusableInTouchMode = true
             visibility = View.VISIBLE
         }
 
@@ -132,8 +132,8 @@ class AccountInput : LinearLayout {
     private fun loggingInState() {
         input.apply {
             setTextColor(disabledTextColor)
-            setEnabled(false)
-            setFocusable(false)
+            isEnabled = false
+            isFocusable = false
             visibility = View.VISIBLE
         }
 
@@ -144,8 +144,8 @@ class AccountInput : LinearLayout {
     private fun successState() {
         input.apply {
             setTextColor(disabledTextColor)
-            setEnabled(false)
-            setFocusable(false)
+            isEnabled = false
+            isFocusable = false
             visibility = View.VISIBLE
         }
 
@@ -159,8 +159,8 @@ class AccountInput : LinearLayout {
 
         input.apply {
             setTextColor(errorTextColor)
-            setEnabled(true)
-            setFocusableInTouchMode(true)
+            isEnabled = true
+            isFocusableInTouchMode = true
             visibility = View.VISIBLE
             requestFocus()
         }
@@ -168,10 +168,10 @@ class AccountInput : LinearLayout {
 
     private fun setButtonEnabled(enabled: Boolean) {
         button.apply {
-            if (enabled != isEnabled()) {
-                setEnabled(enabled)
-                setClickable(enabled)
-                setFocusable(enabled)
+            if (enabled != isEnabled) {
+                isEnabled = enabled
+                isClickable = enabled
+                isFocusable = enabled
             }
         }
     }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt
index 7cb3626084..efa2d6f5a6 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt
@@ -19,7 +19,7 @@ class BackButton : LinearLayout {
 
     private val label = container.findViewById<TextView>(R.id.label)
 
-    constructor(context: Context) : super(context) {}
+    constructor(context: Context) : super(context)
 
     constructor(context: Context, attributes: AttributeSet) : super(context, attributes) {
         loadAttributes(attributes)
@@ -43,7 +43,7 @@ class BackButton : LinearLayout {
     }
 
     init {
-        setFocusable(true)
+        isFocusable = true
         isClickable = true
         gravity = Gravity.CENTER_VERTICAL or Gravity.START
         orientation = HORIZONTAL
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/Button.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/Button.kt
index c2a5f3510b..e6c266683b 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/Button.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/Button.kt
@@ -80,7 +80,7 @@ open class Button : FrameLayout {
 
     var showSpinner = false
 
-    constructor(context: Context) : super(context) {}
+    constructor(context: Context) : super(context)
 
     constructor(context: Context, attributes: AttributeSet) : super(context, attributes) {
         loadAttributes(attributes)
@@ -105,7 +105,7 @@ open class Button : FrameLayout {
 
     override fun setEnabled(enabled: Boolean) {
         super.setEnabled(enabled)
-        button.setEnabled(enabled)
+        button.isEnabled = enabled
 
         if (enabled) {
             alpha = 1.0f
@@ -117,7 +117,7 @@ open class Button : FrameLayout {
     init {
         button.setOnClickListener {
             jobTracker?.newUiJob(clickJobName!!) {
-                setEnabled(false)
+                isEnabled = false
 
                 if (showSpinner) {
                     image.visibility = GONE
@@ -132,7 +132,7 @@ open class Button : FrameLayout {
                     image.visibility = VISIBLE
                 }
 
-                setEnabled(true)
+                isEnabled = true
             }
         }
     }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/WidgetState.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/WidgetState.kt
deleted file mode 100644
index e92265b2df..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/WidgetState.kt
+++ /dev/null
@@ -1,9 +0,0 @@
-package net.mullvad.mullvadvpn.ui.widget
-
-import androidx.annotation.DrawableRes
-
-sealed class WidgetState {
-    data class ImageState(@DrawableRes val imageRes: Int) : WidgetState()
-
-    data class SwitchState(val isChecked: Boolean) : WidgetState()
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/AdapterWithHeader.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/AdapterWithHeader.kt
deleted file mode 100644
index 89b0057f63..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/AdapterWithHeader.kt
+++ /dev/null
@@ -1,125 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
-import androidx.recyclerview.widget.RecyclerView.ViewHolder
-import kotlin.properties.Delegates.observable
-
-class AdapterWithHeader<H : ViewHolder>(
-    val adapter: RecyclerView.Adapter<H>,
-    val headerLayoutId: Int
-) : RecyclerView.Adapter<HeaderOrHolder<H>>() {
-    private val observer =
-        object : RecyclerView.AdapterDataObserver() {
-            override fun onChanged() {
-                notifyDataSetChanged()
-            }
-
-            override fun onItemRangeChanged(start: Int, count: Int) {
-                notifyItemRangeChanged(start + 1, count)
-            }
-
-            override fun onItemRangeChanged(start: Int, count: Int, payload: Any?) {
-                notifyItemRangeChanged(start + 1, count, payload)
-            }
-
-            override fun onItemRangeInserted(start: Int, count: Int) {
-                notifyItemRangeInserted(start + 1, count)
-            }
-
-            override fun onItemRangeMoved(from: Int, to: Int, count: Int) {
-                if (from == to) {
-                    notifyItemRangeChanged(from + 1, count)
-                } else {
-                    val sourceStart = from + 1
-                    val sourceEnd = sourceStart + count
-                    val destinationStart = to + 1
-                    val destinationEnd = destinationStart + count
-
-                    val ascendingIndices =
-                        (sourceStart..sourceEnd).zip(destinationStart..destinationEnd)
-
-                    val indices =
-                        if (from < to) {
-                            ascendingIndices.asReversed()
-                        } else {
-                            ascendingIndices
-                        }
-
-                    for ((source, destination) in indices) {
-                        notifyItemMoved(source, destination)
-                    }
-                }
-            }
-
-            override fun onItemRangeRemoved(start: Int, count: Int) {
-                notifyItemRangeRemoved(start + 1, count)
-            }
-        }
-
-    private var headerView: View? by
-        observable<View?>(null) { _, _, newView ->
-            newView?.let { view -> onHeaderAvailable?.invoke(view) }
-        }
-
-    var onHeaderAvailable by
-        observable<((View) -> Unit)?>(null) { _, _, listener ->
-            headerView?.let { header -> listener?.invoke(header) }
-        }
-
-    init {
-        adapter.registerAdapterDataObserver(observer)
-    }
-
-    override fun getItemCount() = adapter.itemCount + 1
-
-    override fun getItemId(position: Int): Long {
-        if (position == 0) {
-            return 0L
-        } else {
-            return adapter.getItemId(position - 1) + 1
-        }
-    }
-
-    override fun getItemViewType(position: Int): Int {
-        if (position == 0) {
-            return 0
-        } else {
-            return adapter.getItemViewType(position - 1) + 1
-        }
-    }
-
-    override fun onBindViewHolder(holder: HeaderOrHolder<H>, position: Int) {
-        when (holder) {
-            is HeaderOrHolder.Header -> {
-                if (position != 0) {
-                    throw IllegalArgumentException("Adapter position is not for the header")
-                }
-            }
-            is HeaderOrHolder.Holder -> {
-                if (position > 0) {
-                    adapter.onBindViewHolder(holder.holder, position - 1)
-                } else {
-                    throw IllegalArgumentException("Adapter position is for the header")
-                }
-            }
-        }
-    }
-
-    override fun onCreateViewHolder(parentView: ViewGroup, viewType: Int): HeaderOrHolder<H> {
-        if (viewType == 0) {
-            val inflater = LayoutInflater.from(parentView.context)
-            val view = inflater.inflate(headerLayoutId, parentView, false)
-
-            headerView = view
-
-            return HeaderOrHolder.Header(view)
-        } else {
-            val holder = adapter.onCreateViewHolder(parentView, viewType - 1)
-
-            return HeaderOrHolder.Holder(holder)
-        }
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangeMonitor.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangeMonitor.kt
deleted file mode 100644
index c8361a36c4..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangeMonitor.kt
+++ /dev/null
@@ -1,19 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-import kotlin.properties.Delegates.observable
-
-class ChangeMonitor {
-    var changed = false
-        private set
-
-    fun <T> monitor(initialValue: T) =
-        observable(initialValue) { _, oldValue, newValue ->
-            if (oldValue != newValue) {
-                changed = true
-            }
-        }
-
-    fun reset() {
-        changed = false
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangelogDataProvider.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangelogDataProvider.kt
index 8ce36fd717..c1dc72ebfe 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangelogDataProvider.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangelogDataProvider.kt
@@ -7,7 +7,7 @@ import java.io.IOException
 private const val CHANGELOG_FILE = "en-US/default.txt"
 private const val EMPTY_DEFAULT_STRING_WHEN_UNABLE_TO_READ_CHANGELOG = ""
 
-class ChangelogDataProvider(var assets: AssetManager) : IChangelogDataProvider {
+class ChangelogDataProvider(private var assets: AssetManager) : IChangelogDataProvider {
     override fun getChangelog(): String {
         return try {
             assets.open(CHANGELOG_FILE).bufferedReader().use { it.readText() }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ExponentialBackoff.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ExponentialBackoff.kt
deleted file mode 100644
index 1117b0b749..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ExponentialBackoff.kt
+++ /dev/null
@@ -1,52 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-// Calculates a series of delays that increase exponentially.
-//
-// The delays follow the formula:
-//
-// (base ^ retryAttempt) * scale
-//
-// but it is never larger than the specified cap value.
-class ExponentialBackoff : Iterator<Long> {
-    private var unscaledValue = 1L
-    private var current = 1L
-
-    var iteration = 1
-        private set
-
-    var base = 2L
-    var scale = 1000L
-    var cap = Long.MAX_VALUE
-    var count: Int? = null
-
-    override fun hasNext(): Boolean {
-        val maxIterations = count
-
-        if (maxIterations != null) {
-            return iteration < maxIterations
-        } else {
-            return true
-        }
-    }
-
-    override fun next(): Long {
-        iteration += 1
-
-        if (current >= cap) {
-            return cap
-        } else {
-            val value = current
-
-            unscaledValue *= base
-            current = Math.min(cap, scale * unscaledValue)
-
-            return value
-        }
-    }
-
-    fun reset() {
-        unscaledValue = 1L
-        current = 1L
-        iteration = 1
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/FlowUtils.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/FlowUtils.kt
index 77caddec85..d18e4f8fc9 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/FlowUtils.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/FlowUtils.kt
@@ -13,7 +13,7 @@ import net.mullvad.mullvadvpn.ui.serviceconnection.ServiceConnectionState
 import net.mullvad.talpid.util.EventNotifier
 
 fun Animation.transitionFinished(): Flow<Unit> =
-    callbackFlow<Unit> {
+    callbackFlow {
             val transitionAnimationListener =
                 object : Animation.AnimationListener {
                     override fun onAnimationStart(animation: Animation?) {}
@@ -44,12 +44,11 @@ fun <R> Flow<ServiceConnectionState>.flatMapReadyConnectionOrDefault(
     }
 }
 
-fun <T> callbackFlowFromNotifier(notifier: EventNotifier<T>) =
-    callbackFlow<T> {
-        val handler: (T) -> Unit = { value -> trySend(value) }
-        notifier.subscribe(this, handler)
-        awaitClose { notifier.unsubscribe(this) }
-    }
+fun <T> callbackFlowFromNotifier(notifier: EventNotifier<T>) = callbackFlow {
+    val handler: (T) -> Unit = { value -> trySend(value) }
+    notifier.subscribe(this, handler)
+    awaitClose { notifier.unsubscribe(this) }
+}
 
 inline fun <T1, T2, T3, T4, T5, T6, R> combine(
     flow: Flow<T1>,
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/GenericExtensions.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/GenericExtensions.kt
deleted file mode 100644
index 0ab0485c79..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/GenericExtensions.kt
+++ /dev/null
@@ -1,5 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-inline fun <T1 : Any, T2 : Any, R : Any> safeLet(p1: T1?, p2: T2?, block: (T1, T2) -> R?): R? {
-    return if (p1 != null && p2 != null) block(p1, p2) else null
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/HeaderOrHolder.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/HeaderOrHolder.kt
deleted file mode 100644
index a1b50c6efb..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/HeaderOrHolder.kt
+++ /dev/null
@@ -1,10 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-import android.view.View
-import androidx.recyclerview.widget.RecyclerView.ViewHolder
-
-sealed class HeaderOrHolder<H : ViewHolder>(itemView: View) : ViewHolder(itemView) {
-    class Header<H : ViewHolder>(headerView: View) : HeaderOrHolder<H>(headerView)
-
-    class Holder<H : ViewHolder>(val holder: H) : HeaderOrHolder<H>(holder.itemView)
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/LinearInterpolation.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/LinearInterpolation.kt
index 750780aa6a..ff03844e91 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/LinearInterpolation.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/LinearInterpolation.kt
@@ -22,11 +22,11 @@ class LinearInterpolation {
 
     var updated = true
         get() {
-            if (field == true) {
+            return if (field) {
                 field = false
-                return true
+                true
             } else {
-                return false
+                false
             }
         }
 
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SegmentedInputFormatter.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SegmentedInputFormatter.kt
index 4dd6b7bc1b..6d3a3e5cc8 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SegmentedInputFormatter.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SegmentedInputFormatter.kt
@@ -3,6 +3,7 @@ package net.mullvad.mullvadvpn.util
 import android.text.Editable
 import android.text.TextWatcher
 import android.widget.EditText
+import java.util.Locale
 
 class SegmentedInputFormatter(val input: EditText, var separator: Char) : TextWatcher {
     private var editing = false
@@ -114,7 +115,11 @@ class SegmentedInputFormatter(val input: EditText, var separator: Char) : TextWa
                 val character = input[index]
 
                 if (allCaps && character >= 'a' && character <= 'z') {
-                    input.replace(index, index + 1, character.toString().toUpperCase())
+                    input.replace(
+                        index,
+                        index + 1,
+                        character.toString().uppercase(Locale.getDefault())
+                    )
                 } else if (!isValidInputCharacter(character)) {
                     input.delete(index, index + 1)
                 } else {
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SmartDeferred.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SmartDeferred.kt
deleted file mode 100644
index 45ee4a2a17..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/SmartDeferred.kt
+++ /dev/null
@@ -1,32 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-import kotlinx.coroutines.Deferred
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
-import net.mullvad.mullvadvpn.lib.common.util.JobTracker
-
-class SmartDeferred<T>(private val deferred: Deferred<T>) {
-    private val jobTracker = JobTracker()
-
-    private var active = true
-
-    fun awaitThen(action: T.() -> Unit): Long? {
-        if (active) {
-            return jobTracker.newJob(
-                GlobalScope.launch(Dispatchers.Default) { deferred.await().action() }
-            )
-        } else {
-            return null
-        }
-    }
-
-    fun cancelJob(jobId: Long) {
-        jobTracker.cancelJob(jobId)
-    }
-
-    fun cancel() {
-        active = false
-        jobTracker.cancelAllJobs()
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/TimeAgoFormatter.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/TimeAgoFormatter.kt
deleted file mode 100644
index 3ae5f499cd..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/TimeAgoFormatter.kt
+++ /dev/null
@@ -1,34 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-import android.content.res.Resources
-import net.mullvad.mullvadvpn.R
-import org.joda.time.DateTime
-import org.joda.time.Duration
-import org.joda.time.PeriodType
-
-class TimeAgoFormatter(val resources: Resources) {
-    private val periodType = PeriodType.standard().withMillisRemoved().withSecondsRemoved()
-
-    fun format(instant: DateTime): String {
-        val elapsedTime = Duration(instant, DateTime.now())
-        val elapsedTimeInfo = elapsedTime.toPeriodTo(instant, periodType)
-
-        if (elapsedTimeInfo.years > 0) {
-            return getRemainingText(R.plurals.years_ago, elapsedTimeInfo.years)
-        } else if (elapsedTimeInfo.months > 0) {
-            return getRemainingText(R.plurals.months_ago, elapsedTimeInfo.months)
-        } else if (elapsedTimeInfo.days > 0) {
-            return getRemainingText(R.plurals.days_ago, elapsedTimeInfo.days)
-        } else if (elapsedTimeInfo.hours > 0) {
-            return getRemainingText(R.plurals.hours_ago, elapsedTimeInfo.hours)
-        } else if (elapsedTimeInfo.minutes > 0) {
-            return getRemainingText(R.plurals.minutes_ago, elapsedTimeInfo.minutes)
-        } else {
-            return resources.getString(R.string.less_than_a_minute_ago)
-        }
-    }
-
-    private fun getRemainingText(pluralId: Int, quantity: Int): String {
-        return resources.getQuantityString(pluralId, quantity, quantity)
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ViewKtx.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ViewKtx.kt
deleted file mode 100644
index fb4a4c65b6..0000000000
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/util/ViewKtx.kt
+++ /dev/null
@@ -1,15 +0,0 @@
-package net.mullvad.mullvadvpn.util
-
-import android.util.Log
-import android.view.View
-import android.view.ViewGroup.MarginLayoutParams
-
-fun View.setMargins(l: Int? = null, t: Int? = null, r: Int? = null, b: Int? = null) {
-    if (this.layoutParams is MarginLayoutParams) {
-        val p = this.layoutParams as MarginLayoutParams
-        p.setMargins(l ?: p.leftMargin, t ?: p.topMargin, r ?: p.rightMargin, b ?: p.bottomMargin)
-        this.requestLayout()
-    } else {
-        Log.w("mullvad", "setMargins is not supported")
-    }
-}
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/ChangelogViewModel.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/ChangelogViewModel.kt
index bbfac3e024..1c541944d2 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/ChangelogViewModel.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/ChangelogViewModel.kt
@@ -40,5 +40,5 @@ class ChangelogViewModel(
 sealed class ChangelogDialogUiState {
     data class Show(val changes: List<String>) : ChangelogDialogUiState()
 
-    object Hide : ChangelogDialogUiState()
+    data object Hide : ChangelogDialogUiState()
 }
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModel.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModel.kt
index 6fb00b1922..07e8f48705 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModel.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModel.kt
@@ -26,23 +26,23 @@ class LoginViewModel(
     val accountHistory = accountRepository.accountHistoryEvents
 
     sealed class LoginUiState {
-        object Default : LoginUiState()
+        data object Default : LoginUiState()
 
-        object Loading : LoginUiState()
+        data object Loading : LoginUiState()
 
         data class Success(val isOutOfTime: Boolean) : LoginUiState()
 
-        object CreatingAccount : LoginUiState()
+        data object CreatingAccount : LoginUiState()
 
-        object AccountCreated : LoginUiState()
+        data object AccountCreated : LoginUiState()
 
-        object UnableToCreateAccountError : LoginUiState()
+        data object UnableToCreateAccountError : LoginUiState()
 
-        object InvalidAccountError : LoginUiState()
+        data object InvalidAccountError : LoginUiState()
 
         data class TooManyDevicesError(val accountToken: String) : LoginUiState()
 
-        object TooManyDevicesMissingListError : LoginUiState()
+        data object TooManyDevicesMissingListError : LoginUiState()
 
         data class OtherError(val errorMessage: String) : LoginUiState()
 
diff --git a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/VpnSettingsViewModelState.kt b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/VpnSettingsViewModelState.kt
index fbcc60258a..aba6dd7e36 100644
--- a/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/VpnSettingsViewModelState.kt
+++ b/android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/VpnSettingsViewModelState.kt
@@ -199,27 +199,27 @@ data class VpnSettingsViewModelState(
 }
 
 sealed class VpnSettingsDialogState {
-    object NoDialog : VpnSettingsDialogState()
+    data object NoDialog : VpnSettingsDialogState()
 
     data class MtuDialog(val mtuEditValue: String) : VpnSettingsDialogState()
 
     data class DnsDialog(val stagedDns: StagedDns) : VpnSettingsDialogState()
 
-    object LocalNetworkSharingInfoDialog : VpnSettingsDialogState()
+    data object LocalNetworkSharingInfoDialog : VpnSettingsDialogState()
 
-    object ContentBlockersInfoDialog : VpnSettingsDialogState()
+    data object ContentBlockersInfoDialog : VpnSettingsDialogState()
 
-    object CustomDnsInfoDialog : VpnSettingsDialogState()
+    data object CustomDnsInfoDialog : VpnSettingsDialogState()
 
-    object MalwareInfoDialog : VpnSettingsDialogState()
+    data object MalwareInfoDialog : VpnSettingsDialogState()
 
-    object ObfuscationInfoDialog : VpnSettingsDialogState()
+    data object ObfuscationInfoDialog : VpnSettingsDialogState()
 
-    object QuantumResistanceInfoDialog : VpnSettingsDialogState()
+    data object QuantumResistanceInfoDialog : VpnSettingsDialogState()
 
-    object WireguardPortInfoDialog : VpnSettingsDialogState()
+    data object WireguardPortInfoDialog : VpnSettingsDialogState()
 
-    object CustomPortDialog : VpnSettingsDialogState()
+    data object CustomPortDialog : VpnSettingsDialogState()
 }
 
 sealed interface StagedDns {
@@ -238,11 +238,11 @@ sealed interface StagedDns {
     ) : StagedDns
 
     sealed class ValidationResult {
-        object Success : ValidationResult()
+        data object Success : ValidationResult()
 
-        object InvalidAddress : ValidationResult()
+        data object InvalidAddress : ValidationResult()
 
-        object DuplicateAddress : ValidationResult()
+        data object DuplicateAddress : ValidationResult()
     }
 
     fun isValid() = (validationResult is ValidationResult.Success)