diff --git a/app/src/main/kotlin/com/github/gotify/CoilInstance.kt b/app/src/main/kotlin/com/github/gotify/CoilInstance.kt
index ca50977..53e2c1c 100644
--- a/app/src/main/kotlin/com/github/gotify/CoilInstance.kt
+++ b/app/src/main/kotlin/com/github/gotify/CoilInstance.kt
@@ -3,12 +3,12 @@ package com.github.gotify
 import android.content.Context
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
-import android.graphics.drawable.BitmapDrawable
 import android.net.Uri
 import android.util.Base64
 import androidx.annotation.DrawableRes
 import androidx.appcompat.content.res.AppCompatResources
 import androidx.core.graphics.drawable.toBitmap
+import androidx.core.graphics.drawable.toDrawable
 import coil.ImageLoader
 import coil.annotation.ExperimentalCoilApi
 import coil.decode.DataSource
@@ -148,7 +148,7 @@ class DataDecoderFactory : Fetcher.Factory<Uri> {
 
         return Fetcher {
             DrawableResult(
-                drawable = BitmapDrawable(options.context.resources, bitmap),
+                drawable = bitmap.toDrawable(options.context.resources),
                 isSampled = false,
                 dataSource = DataSource.MEMORY
             )
diff --git a/app/src/main/kotlin/com/github/gotify/MissedMessageUtil.kt b/app/src/main/kotlin/com/github/gotify/MissedMessageUtil.kt
index 52e1a0f..5597ec9 100644
--- a/app/src/main/kotlin/com/github/gotify/MissedMessageUtil.kt
+++ b/app/src/main/kotlin/com/github/gotify/MissedMessageUtil.kt
@@ -33,7 +33,7 @@ internal class MissedMessageUtil(private val api: MessageApi) {
                 val filtered = filter(messages, till)
                 result.addAll(filtered)
                 if (messages.size != filtered.size ||
-                    messages.size == 0 ||
+                    messages.isEmpty() ||
                     pagedMessages.paging.next == null
                 ) {
                     break
diff --git a/app/src/main/kotlin/com/github/gotify/Settings.kt b/app/src/main/kotlin/com/github/gotify/Settings.kt
index 0592a3c..243c6c7 100644
--- a/app/src/main/kotlin/com/github/gotify/Settings.kt
+++ b/app/src/main/kotlin/com/github/gotify/Settings.kt
@@ -2,6 +2,7 @@ package com.github.gotify
 
 import android.content.Context
 import android.content.SharedPreferences
+import androidx.core.content.edit
 import com.github.gotify.client.model.User
 
 internal class Settings(context: Context) {
@@ -9,10 +10,10 @@ internal class Settings(context: Context) {
     val filesDir: String
     var url: String
         get() = sharedPreferences.getString("url", "")!!
-        set(value) = sharedPreferences.edit().putString("url", value).apply()
+        set(value) = sharedPreferences.edit { putString("url", value) }
     var token: String?
         get() = sharedPreferences.getString("token", null)
-        set(value) = sharedPreferences.edit().putString("token", value).apply()
+        set(value) = sharedPreferences.edit { putString("token", value) }
     var user: User? = null
         get() {
             val username = sharedPreferences.getString("username", null)
@@ -26,22 +27,24 @@ internal class Settings(context: Context) {
         private set
     var serverVersion: String
         get() = sharedPreferences.getString("version", "UNKNOWN")!!
-        set(value) = sharedPreferences.edit().putString("version", value).apply()
+        set(value) = sharedPreferences.edit { putString("version", value) }
     var legacyCert: String?
         get() = sharedPreferences.getString("cert", null)
-        set(value) = sharedPreferences.edit().putString("cert", value).commit().toUnit()
+        set(value) = sharedPreferences.edit(commit = true) { putString("cert", value) }.toUnit()
     var caCertPath: String?
         get() = sharedPreferences.getString("caCertPath", null)
-        set(value) = sharedPreferences.edit().putString("caCertPath", value).commit().toUnit()
+        set(value) = sharedPreferences
+            .edit(commit = true) { putString("caCertPath", value) }
+            .toUnit()
     var validateSSL: Boolean
         get() = sharedPreferences.getBoolean("validateSSL", true)
-        set(value) = sharedPreferences.edit().putBoolean("validateSSL", value).apply()
+        set(value) = sharedPreferences.edit { putBoolean("validateSSL", value) }
     var clientCertPath: String?
         get() = sharedPreferences.getString("clientCertPath", null)
-        set(value) = sharedPreferences.edit().putString("clientCertPath", value).apply()
+        set(value) = sharedPreferences.edit { putString("clientCertPath", value) }
     var clientCertPassword: String?
         get() = sharedPreferences.getString("clientCertPass", null)
-        set(value) = sharedPreferences.edit().putString("clientCertPass", value).apply()
+        set(value) = sharedPreferences.edit { putString("clientCertPass", value) }
 
     init {
         sharedPreferences = context.getSharedPreferences("gotify", Context.MODE_PRIVATE)
@@ -61,7 +64,7 @@ internal class Settings(context: Context) {
     }
 
     fun setUser(name: String?, admin: Boolean) {
-        sharedPreferences.edit().putString("username", name).putBoolean("admin", admin).apply()
+        sharedPreferences.edit { putString("username", name).putBoolean("admin", admin) }
     }
 
     fun sslSettings(): SSLSettings {
diff --git a/app/src/main/kotlin/com/github/gotify/api/Callback.kt b/app/src/main/kotlin/com/github/gotify/api/Callback.kt
index 5b0d0f1..15c2b7b 100644
--- a/app/src/main/kotlin/com/github/gotify/api/Callback.kt
+++ b/app/src/main/kotlin/com/github/gotify/api/Callback.kt
@@ -1,8 +1,6 @@
 package com.github.gotify.api
 
 import android.app.Activity
-import com.github.gotify.api.Callback.ErrorCallback
-import com.github.gotify.api.Callback.SuccessCallback
 import org.tinylog.kotlin.Logger
 import retrofit2.Call
 import retrofit2.Response
diff --git a/app/src/main/kotlin/com/github/gotify/init/InitializationActivity.kt b/app/src/main/kotlin/com/github/gotify/init/InitializationActivity.kt
index ea42ef7..534d477 100644
--- a/app/src/main/kotlin/com/github/gotify/init/InitializationActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/init/InitializationActivity.kt
@@ -3,13 +3,13 @@ package com.github.gotify.init
 import android.Manifest
 import android.app.AlarmManager
 import android.content.Intent
-import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult
 import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
+import androidx.core.net.toUri
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import com.github.gotify.R
 import com.github.gotify.Settings
@@ -126,7 +126,7 @@ internal class InitializationActivity : AppCompatActivity() {
             .setPositiveButton(getString(R.string.permissions_dialog_grant)) { _, _ ->
                 Intent(
                     android.provider.Settings.ACTION_REQUEST_SCHEDULE_EXACT_ALARM,
-                    Uri.parse("package:$packageName")
+                    "package:$packageName".toUri()
                 ).apply {
                     activityResultLauncher.launch(this)
                 }
diff --git a/app/src/main/kotlin/com/github/gotify/log/LogsActivity.kt b/app/src/main/kotlin/com/github/gotify/log/LogsActivity.kt
index 4fc0610..90198dc 100644
--- a/app/src/main/kotlin/com/github/gotify/log/LogsActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/log/LogsActivity.kt
@@ -2,7 +2,6 @@ package com.github.gotify.log
 
 import android.content.ClipData
 import android.content.ClipboardManager
-import android.content.Context
 import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
@@ -73,7 +72,7 @@ internal class LogsActivity : AppCompatActivity() {
             R.id.action_copy_logs -> {
                 val content = binding.logContent
                 val clipboardManager =
-                    getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+                    getSystemService(CLIPBOARD_SERVICE) as ClipboardManager
                 val clipData = ClipData.newPlainText("GotifyLog", content.text.toString())
                 clipboardManager.setPrimaryClip(clipData)
                 Utils.showSnackBar(this, getString(R.string.logs_copied))
diff --git a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
index e874c49..df31e7c 100644
--- a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
@@ -215,7 +215,7 @@ internal class LoginActivity : AppCompatActivity() {
 
         try {
             resultLauncher.launch(Intent.createChooser(intent, getString(descriptionId)))
-        } catch (e: ActivityNotFoundException) {
+        } catch (_: ActivityNotFoundException) {
             // case for user not having a file browser installed
             Utils.showSnackBar(this, getString(R.string.please_install_file_browser))
         }
diff --git a/app/src/main/kotlin/com/github/gotify/messages/IntentUrlDialogActivity.kt b/app/src/main/kotlin/com/github/gotify/messages/IntentUrlDialogActivity.kt
index a2bebcc..1dc5e68 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/IntentUrlDialogActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/IntentUrlDialogActivity.kt
@@ -1,9 +1,9 @@
 package com.github.gotify.messages
 
 import android.content.Intent
-import android.net.Uri
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.net.toUri
 import com.github.gotify.databinding.ActivityDialogIntentUrlBinding
 
 internal class IntentUrlDialogActivity : AppCompatActivity() {
@@ -18,7 +18,7 @@ internal class IntentUrlDialogActivity : AppCompatActivity() {
         binding.openButton.setOnClickListener {
             finish()
             Intent(Intent.ACTION_VIEW).apply {
-                data = Uri.parse(intentUrl)
+                data = intentUrl?.toUri()
                 flags = Intent.FLAG_ACTIVITY_NEW_TASK
                 startActivity(this)
             }
diff --git a/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt b/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
index 1e211cc..145928d 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
@@ -1,5 +1,6 @@
 package com.github.gotify.messages
 
+import android.annotation.SuppressLint
 import android.app.NotificationManager
 import android.content.BroadcastReceiver
 import android.content.Context
@@ -8,7 +9,6 @@ import android.content.IntentFilter
 import android.graphics.Canvas
 import android.graphics.drawable.ColorDrawable
 import android.graphics.drawable.Drawable
-import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.view.Menu
@@ -21,6 +21,8 @@ import androidx.appcompat.app.ActionBarDrawerToggle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.DrawableCompat
+import androidx.core.graphics.drawable.toDrawable
+import androidx.core.net.toUri
 import androidx.core.view.GravityCompat
 import androidx.drawerlayout.widget.DrawerLayout.SimpleDrawerListener
 import androidx.lifecycle.ViewModelProvider
@@ -188,7 +190,7 @@ internal class MessagesActivity :
     }
 
     private fun openDocumentation() {
-        val browserIntent = Intent(Intent.ACTION_VIEW, Uri.parse("https://gotify.net/docs/pushmsg"))
+        val browserIntent = Intent(Intent.ACTION_VIEW, "https://gotify.net/docs/pushmsg".toUri())
         startActivity(browserIntent)
     }
 
@@ -317,6 +319,7 @@ internal class MessagesActivity :
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
             registerReceiver(receiver, filter, RECEIVER_EXPORTED)
         } else {
+            @SuppressLint("UnspecifiedRegisterReceiverFlag")
             registerReceiver(receiver, filter)
         }
         launchCoroutine {
@@ -409,7 +412,7 @@ internal class MessagesActivity :
                 icon = DrawableCompat.wrap(drawable.mutate())
                 DrawableCompat.setTint(icon!!, iconColorId)
             }
-            background = ColorDrawable(backgroundColorId)
+            background = backgroundColorId.toDrawable()
         }
 
         override fun onMove(
diff --git a/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt b/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
index 60a37dd..719d7c9 100644
--- a/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
+++ b/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
@@ -10,12 +10,12 @@ import android.content.pm.ServiceInfo
 import android.graphics.Color
 import android.net.ConnectivityManager
 import android.net.Network
-import android.net.Uri
 import android.os.Build
 import android.os.IBinder
 import androidx.annotation.RequiresApi
 import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
+import androidx.core.net.toUri
 import com.github.gotify.BuildConfig
 import com.github.gotify.CoilInstance
 import com.github.gotify.MarkwonFactory
@@ -331,7 +331,7 @@ internal class WebSocketService : Service() {
 
         if (url != null) {
             intent = Intent(Intent.ACTION_VIEW)
-            intent.data = Uri.parse(url)
+            intent.data = url.toUri()
         } else {
             intent = Intent(this, MessagesActivity::class.java)
         }
diff --git a/app/src/main/kotlin/com/github/gotify/settings/SettingsActivity.kt b/app/src/main/kotlin/com/github/gotify/settings/SettingsActivity.kt
index a4d32ce..f341270 100644
--- a/app/src/main/kotlin/com/github/gotify/settings/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/settings/SettingsActivity.kt
@@ -5,13 +5,13 @@ import android.content.DialogInterface
 import android.content.Intent
 import android.content.SharedPreferences
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener
-import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.provider.Settings
 import android.view.MenuItem
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.net.toUri
 import androidx.preference.ListPreference
 import androidx.preference.ListPreferenceDialogFragmentCompat
 import androidx.preference.Preference
@@ -128,7 +128,7 @@ internal class SettingsActivity :
         private fun openSystemAlertWindowPermissionPage(): Boolean {
             Intent(
                 Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
-                Uri.parse("package:${requireContext().packageName}")
+                "package:${requireContext().packageName}".toUri()
             ).apply {
                 startActivity(this)
             }