Merge pull request #278 from cyb3rko/notification-channels

Separate Notification channels for each app

app/src/main/kotlin/com/github/gotify/NotificationSupport.kt

@@ -1,56 +1,93 @@
 package com.github.gotify
 
 import android.app.NotificationChannel
+import android.app.NotificationChannelGroup
 import android.app.NotificationManager
+import android.app.Service
+import android.content.Context
 import android.graphics.Color
 import android.os.Build
 import androidx.annotation.RequiresApi
+import androidx.preference.PreferenceManager
+import com.github.gotify.client.model.Application
 import com.github.gotify.log.Log
 
 internal object NotificationSupport {
     @RequiresApi(Build.VERSION_CODES.O)
-    fun createChannels(notificationManager: NotificationManager) {
+    fun createForegroundChannel(context: Context, notificationManager: NotificationManager) {
-        try {
+        // Low importance so that persistent notification can be sorted towards bottom of
-            // Low importance so that persistent notification can be sorted towards bottom of
+        // notification shade. Also prevents vibrations caused by persistent notification
-            // notification shade. Also prevents vibrations caused by persistent notification
+        val foreground = NotificationChannel(
-            val foreground = NotificationChannel(
+            Channel.FOREGROUND,
-                Channel.FOREGROUND,
+            context.getString(R.string.notification_channel_title_foreground),
-                "Gotify foreground notification",
+            NotificationManager.IMPORTANCE_LOW
-                NotificationManager.IMPORTANCE_LOW
+        ).apply {
-            )
+            setShowBadge(false)
-            foreground.setShowBadge(false)
+        }
+        notificationManager.createNotificationChannel(foreground)
+    }
 
+    @RequiresApi(Build.VERSION_CODES.O)
+    fun createChannels(
+        context: Context,
+        notificationManager: NotificationManager,
+        applications: List<Application>
+    ) {
+        if (areAppChannelsRequested(context)) {
+            notificationManager.notificationChannels.forEach { channel ->
+                if (channel.id != Channel.FOREGROUND) {
+                    notificationManager.deleteNotificationChannel(channel.id)
+                }
+            }
+            applications.forEach { app ->
+                createAppChannels(context, notificationManager, app.id.toString(), app.name)
+            }
+        } else {
+            notificationManager.notificationChannelGroups.forEach { group ->
+                notificationManager.deleteNotificationChannelGroup(group.id)
+            }
+            createGeneralChannels(context, notificationManager)
+        }
+    }
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    private fun createGeneralChannels(
+        context: Context,
+        notificationManager: NotificationManager
+    ) {
+        try {
             val messagesImportanceMin = NotificationChannel(
                 Channel.MESSAGES_IMPORTANCE_MIN,
-                "Min priority messages (<1)",
+                context.getString(R.string.notification_channel_title_min),
                 NotificationManager.IMPORTANCE_MIN
             )
 
             val messagesImportanceLow = NotificationChannel(
                 Channel.MESSAGES_IMPORTANCE_LOW,
-                "Low priority messages (1-3)",
+                context.getString(R.string.notification_channel_title_low),
                 NotificationManager.IMPORTANCE_LOW
             )
 
             val messagesImportanceDefault = NotificationChannel(
                 Channel.MESSAGES_IMPORTANCE_DEFAULT,
-                "Normal priority messages (4-7)",
+                context.getString(R.string.notification_channel_title_normal),
                 NotificationManager.IMPORTANCE_DEFAULT
-            )
+            ).apply {
-            messagesImportanceDefault.enableLights(true)
+                enableLights(true)
-            messagesImportanceDefault.lightColor = Color.CYAN
+                lightColor = Color.CYAN
-            messagesImportanceDefault.enableVibration(true)
+                enableVibration(true)
+            }
 
             val messagesImportanceHigh = NotificationChannel(
                 Channel.MESSAGES_IMPORTANCE_HIGH,
-                "High priority messages (>7)",
+                context.getString(R.string.notification_channel_title_high),
                 NotificationManager.IMPORTANCE_HIGH
-            )
+            ).apply {
-            messagesImportanceHigh.enableLights(true)
+                enableLights(true)
-            messagesImportanceHigh.lightColor = Color.CYAN
+                lightColor = Color.CYAN
-            messagesImportanceHigh.enableVibration(true)
+                enableVibration(true)
+            }
 
-            notificationManager.createNotificationChannel(foreground)
             notificationManager.createNotificationChannel(messagesImportanceMin)
             notificationManager.createNotificationChannel(messagesImportanceLow)
             notificationManager.createNotificationChannel(messagesImportanceDefault)
@@ -60,6 +97,88 @@ internal object NotificationSupport {
         }
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    fun createChannelIfNonexistent(
+        context: Context,
+        groupId: String,
+        channelId: String
+    ) {
+        if (!doesNotificationChannelExist(context, channelId)) {
+            val notificationManager = (context as Service)
+                .getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+            createAppChannels(context, notificationManager, groupId, groupId)
+        }
+    }
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    private fun createAppChannels(
+        context: Context,
+        notificationManager: NotificationManager,
+        groupId: String,
+        groupName: String
+    ) {
+        try {
+            notificationManager.createNotificationChannelGroup(
+                NotificationChannelGroup(
+                    groupId,
+                    groupName
+                )
+            )
+
+            val messagesImportanceMin = NotificationChannel(
+                getChannelID(Channel.MESSAGES_IMPORTANCE_MIN, groupId),
+                context.getString(R.string.notification_channel_title_min),
+                NotificationManager.IMPORTANCE_MIN
+            ).apply {
+                group = groupId
+            }
+
+            val messagesImportanceLow = NotificationChannel(
+                getChannelID(Channel.MESSAGES_IMPORTANCE_LOW, groupId),
+                context.getString(R.string.notification_channel_title_low),
+                NotificationManager.IMPORTANCE_LOW
+            ).apply {
+                group = groupId
+            }
+
+            val messagesImportanceDefault = NotificationChannel(
+                getChannelID(Channel.MESSAGES_IMPORTANCE_DEFAULT, groupId),
+                context.getString(R.string.notification_channel_title_normal),
+                NotificationManager.IMPORTANCE_DEFAULT
+            ).apply {
+                enableLights(true)
+                lightColor = Color.CYAN
+                enableVibration(true)
+                group = groupId
+            }
+
+            val messagesImportanceHigh = NotificationChannel(
+                getChannelID(Channel.MESSAGES_IMPORTANCE_HIGH, groupId),
+                context.getString(R.string.notification_channel_title_high),
+                NotificationManager.IMPORTANCE_HIGH
+            ).apply {
+                enableLights(true)
+                lightColor = Color.CYAN
+                enableVibration(true)
+                group = groupId
+            }
+
+            notificationManager.createNotificationChannel(messagesImportanceMin)
+            notificationManager.createNotificationChannel(messagesImportanceLow)
+            notificationManager.createNotificationChannel(messagesImportanceDefault)
+            notificationManager.createNotificationChannel(messagesImportanceHigh)
+        } catch (e: Exception) {
+            Log.e("Could not create channel", e)
+        }
+    }
+
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    private fun doesNotificationChannelExist(context: Context, channelId: String): Boolean {
+        val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        val channel = manager.getNotificationChannel(channelId)
+        return channel != null
+    }
+
     /**
      * Map {@link com.github.gotify.client.model.Message#getPriority() Gotify message priorities to
      * Android channels.
@@ -87,6 +206,21 @@ internal object NotificationSupport {
         }
     }
 
+    private fun getChannelID(importance: String, groupId: String): String {
+        return "$groupId::$importance"
+    }
+
+    fun getChannelID(priority: Long, groupId: String): String {
+        return getChannelID(convertPriorityToChannel(priority), groupId)
+    }
+
+    fun areAppChannelsRequested(context: Context): Boolean {
+        return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
+            context.getString(R.string.setting_key_notification_channels),
+            context.resources.getBoolean(R.bool.notification_channels)
+        )
+    }
+
     object Group {
         const val MESSAGES = "GOTIFY_GROUP_MESSAGES"
     }

app/src/main/kotlin/com/github/gotify/init/InitializationActivity.kt

@@ -2,6 +2,7 @@ package com.github.gotify.init
 
 import android.Manifest
 import android.app.NotificationManager
+import android.content.Context
 import android.content.Intent
 import android.os.Build
 import android.os.Bundle
@@ -41,8 +42,9 @@ internal class InitializationActivity : AppCompatActivity() {
         ThemeHelper.setTheme(this, theme)
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            NotificationSupport.createChannels(
+            NotificationSupport.createForegroundChannel(
-                this.getSystemService(NOTIFICATION_SERVICE) as NotificationManager
+                this,
+                (this.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager)
             )
         }
         UncaughtExceptionHandler.registerCurrentThread()

app/src/main/kotlin/com/github/gotify/messages/provider/MessageImageCombiner.kt

@@ -9,7 +9,7 @@ internal object MessageImageCombiner {
         return messages.map { MessageWithImage(message = it, image = appIdToImage[it.appid]) }
     }
 
-    fun appIdToImage(applications: List<Application>): Map<Long, String> {
+    private fun appIdToImage(applications: List<Application>): Map<Long, String> {
         val map = mutableMapOf<Long, String>()
         applications.forEach {
             map[it.id] = it.image

app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt

@@ -6,19 +6,15 @@ import android.graphics.BitmapFactory
 import com.github.gotify.R
 import com.github.gotify.Settings
 import com.github.gotify.Utils
-import com.github.gotify.api.Callback
 import com.github.gotify.api.CertUtils
-import com.github.gotify.api.ClientFactory
+import com.github.gotify.client.model.Application
-import com.github.gotify.client.api.ApplicationApi
 import com.github.gotify.log.Log
-import com.github.gotify.messages.provider.MessageImageCombiner
 import com.squareup.picasso.OkHttp3Downloader
 import com.squareup.picasso.Picasso
 import okhttp3.Cache
 import okhttp3.OkHttpClient
 import java.io.File
 import java.io.IOException
-import java.util.concurrent.ConcurrentHashMap
 
 internal class PicassoHandler(private val context: Context, private val settings: Settings) {
     companion object {
@@ -32,7 +28,6 @@ internal class PicassoHandler(private val context: Context, private val settings
     )
 
     private val picasso = makePicasso()
-    private val appIdToAppImage = ConcurrentHashMap<Long, String>()
 
     private fun makePicasso(): Picasso {
         val builder = OkHttpClient.Builder()
@@ -48,13 +43,13 @@ internal class PicassoHandler(private val context: Context, private val settings
     @Throws(IOException::class)
     fun getImageFromUrl(url: String?): Bitmap = picasso.load(url).get()
 
-    fun getIcon(appId: Long): Bitmap {
+    fun getIcon(app: Application?): Bitmap {
-        if (appId == -1L) {
+        if (app == null) {
             return BitmapFactory.decodeResource(context.resources, R.drawable.gotify)
         }
         try {
             return getImageFromUrl(
-                Utils.resolveAbsoluteUrl("${settings.url}/", appIdToAppImage[appId])
+                Utils.resolveAbsoluteUrl("${settings.url}/", app.image)
             )
         } catch (e: IOException) {
             Log.e("Could not load image for notification", e)
@@ -62,21 +57,6 @@ internal class PicassoHandler(private val context: Context, private val settings
         return BitmapFactory.decodeResource(context.resources, R.drawable.gotify)
     }
 
-    fun updateAppIds() {
-        ClientFactory.clientToken(settings.url, settings.sslSettings(), settings.token)
-            .createService(ApplicationApi::class.java)
-            .apps
-            .enqueue(
-                Callback.call(
-                    onSuccess = Callback.SuccessBody { apps ->
-                        appIdToAppImage.clear()
-                        appIdToAppImage.putAll(MessageImageCombiner.appIdToImage(apps))
-                    },
-                    onError = { appIdToAppImage.clear() }
-                )
-            )
-    }
-
     fun get() = picasso
 
     @Throws(IOException::class)

app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt

@@ -6,7 +6,6 @@ import android.app.NotificationManager
 import android.app.PendingIntent
 import android.app.Service
 import android.content.Intent
-import android.content.IntentFilter
 import android.graphics.Color
 import android.net.ConnectivityManager
 import android.net.Uri
@@ -23,7 +22,9 @@ import com.github.gotify.Settings
 import com.github.gotify.Utils
 import com.github.gotify.api.Callback
 import com.github.gotify.api.ClientFactory
+import com.github.gotify.client.api.ApplicationApi
 import com.github.gotify.client.api.MessageApi
+import com.github.gotify.client.model.Application
 import com.github.gotify.client.model.Message
 import com.github.gotify.log.Log
 import com.github.gotify.log.UncaughtExceptionHandler
@@ -31,6 +32,7 @@ import com.github.gotify.messages.Extras
 import com.github.gotify.messages.MessagesActivity
 import com.github.gotify.picasso.PicassoHandler
 import io.noties.markwon.Markwon
+import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.atomic.AtomicLong
 
 internal class WebSocketService : Service() {
@@ -41,6 +43,7 @@ internal class WebSocketService : Service() {
 
     private lateinit var settings: Settings
     private var connection: WebSocketConnection? = null
+    private val appIdToApp = ConcurrentHashMap<Long, Application>()
 
     private val lastReceivedMessage = AtomicLong(NOT_LOADED)
     private lateinit var missingMessageUtil: MissedMessageUtil
@@ -108,10 +111,29 @@ internal class WebSocketService : Service() {
             .onReconnected { notifyMissedNotifications() }
             .start()
 
-        val intentFilter = IntentFilter()
+        fetchApps()
-        intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION)
+    }
 
-        picassoHandler.updateAppIds()
+    private fun fetchApps() {
+        ClientFactory.clientToken(settings.url, settings.sslSettings(), settings.token)
+            .createService(ApplicationApi::class.java)
+            .apps
+            .enqueue(
+                Callback.call(
+                    onSuccess = Callback.SuccessBody { apps ->
+                        appIdToApp.clear()
+                        appIdToApp.putAll(apps.associateBy { it.id })
+                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                            NotificationSupport.createChannels(
+                                this,
+                                (this.getSystemService(NOTIFICATION_SERVICE) as NotificationManager),
+                                apps
+                            )
+                        }
+                    },
+                    onError = { appIdToApp.clear() }
+                )
+            )
     }
 
     private fun onClose() {
@@ -312,20 +334,31 @@ internal class WebSocketService : Service() {
             PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
         )
 
-        val b = NotificationCompat.Builder(
+        val channelId: String
-            this,
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O &&
-            NotificationSupport.convertPriorityToChannel(priority)
+            NotificationSupport.areAppChannelsRequested(this)
-        )
+        ) {
+            channelId = NotificationSupport.getChannelID(priority, appId.toString())
+            NotificationSupport.createChannelIfNonexistent(
+                this,
+                appId.toString(),
+                channelId
+            )
+        } else {
+            channelId = NotificationSupport.convertPriorityToChannel(priority)
+        }
+
+        val b = NotificationCompat.Builder(this, channelId)
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-            showNotificationGroup(priority)
+            showNotificationGroup(channelId)
         }
 
         b.setAutoCancel(true)
             .setDefaults(Notification.DEFAULT_ALL)
             .setWhen(System.currentTimeMillis())
             .setSmallIcon(R.drawable.ic_gotify)
-            .setLargeIcon(picassoHandler.getIcon(appId))
+            .setLargeIcon(picassoHandler.getIcon(appIdToApp[appId]))
             .setTicker("${getString(R.string.app_name)} - $title")
             .setGroup(NotificationSupport.Group.MESSAGES)
             .setContentTitle(title)
@@ -365,7 +398,7 @@ internal class WebSocketService : Service() {
     }
 
     @RequiresApi(Build.VERSION_CODES.N)
-    fun showNotificationGroup(priority: Long) {
+    fun showNotificationGroup(channelId: String) {
         val intent = Intent(this, MessagesActivity::class.java)
         val contentIntent = PendingIntent.getActivity(
             this,
@@ -376,7 +409,7 @@ internal class WebSocketService : Service() {
 
         val builder = NotificationCompat.Builder(
             this,
-            NotificationSupport.convertPriorityToChannel(priority)
+            channelId
         )
 
         builder.setAutoCancel(true)

app/src/main/kotlin/com/github/gotify/settings/SettingsActivity.kt

@@ -5,6 +5,7 @@ import android.content.DialogInterface
 import android.content.Intent
 import android.content.SharedPreferences
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener
+import android.os.Build
 import android.os.Bundle
 import android.view.MenuItem
 import android.view.View
@@ -14,6 +15,7 @@ import androidx.preference.ListPreferenceDialogFragmentCompat
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.PreferenceManager
+import androidx.preference.SwitchPreferenceCompat
 import com.github.gotify.R
 import com.github.gotify.databinding.SettingsActivityBinding
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -48,38 +50,43 @@ internal class SettingsActivity : AppCompatActivity(), OnSharedPreferenceChangeL
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
-        if (getString(R.string.setting_key_theme) == key) {
+        when (key) {
-            ThemeHelper.setTheme(
+            getString(R.string.setting_key_theme) -> {
-                this,
+                ThemeHelper.setTheme(
-                sharedPreferences.getString(key, getString(R.string.theme_default))!!
+                    this,
-            )
+                    sharedPreferences.getString(key, getString(R.string.theme_default))!!
+                )
+            }
         }
     }
 
     class SettingsFragment : PreferenceFragmentCompat() {
         override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
             setPreferencesFromResource(R.xml.root_preferences, rootKey)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                findPreference<SwitchPreferenceCompat>(
+                    getString(R.string.setting_key_notification_channels)
+                )?.isEnabled = true
+            }
         }
 
         override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
             super.onViewCreated(view, savedInstanceState)
             val messageLayout: ListPreference? =
                 findPreference(getString(R.string.setting_key_message_layout))
+            val notificationChannels: SwitchPreferenceCompat? =
+                findPreference(getString(R.string.setting_key_notification_channels))
             messageLayout?.onPreferenceChangeListener =
                 Preference.OnPreferenceChangeListener { _, _ ->
-                    MaterialAlertDialogBuilder(requireContext())
+                    showRestartDialog()
-                        .setTitle(R.string.setting_message_layout_dialog_title)
+                    true
-                        .setMessage(R.string.setting_message_layout_dialog_message)
+                }
-                        .setPositiveButton(
+            notificationChannels?.onPreferenceChangeListener =
-                            getString(R.string.setting_message_layout_dialog_button1)
+                Preference.OnPreferenceChangeListener { _, _ ->
-                        ) { _, _ ->
+                    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
-                            restartApp()
+                        return@OnPreferenceChangeListener false
-                        }
+                    }
-                        .setNegativeButton(
+                    showRestartDialog()
-                            getString(R.string.setting_message_layout_dialog_button2),
-                            null
-                        )
-                        .show()
                     true
                 }
         }
@@ -102,6 +109,17 @@ internal class SettingsActivity : AppCompatActivity(), OnSharedPreferenceChangeL
             )
         }
 
+        private fun showRestartDialog() {
+            MaterialAlertDialogBuilder(requireContext())
+                .setTitle(R.string.setting_restart_dialog_title)
+                .setMessage(R.string.setting_restart_dialog_message)
+                .setPositiveButton(getString(R.string.setting_restart_dialog_button1)) { _, _ ->
+                    restartApp()
+                }
+                .setNegativeButton(getString(R.string.setting_restart_dialog_button2), null)
+                .show()
+        }
+
         private fun restartApp() {
             val packageManager = requireContext().packageManager
             val packageName = requireContext().packageName

app/src/main/res/layout/preference_switch.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.google.android.material.materialswitch.MaterialSwitch
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/switchWidget"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content" />

app/src/main/res/values/arrays.xml

@@ -34,4 +34,5 @@
     </string-array>
     <string name="time_format_value_absolute">time_format_absolute</string>
     <string name="time_format_value_relative">time_format_relative</string>
+    <bool name="notification_channels">false</bool>
 </resources>

app/src/main/res/values/strings.xml

@@ -74,12 +74,15 @@
     <string name="setting_key_theme">theme</string>
     <string name="setting_message_layout">Message layout</string>
     <string name="setting_key_message_layout">message_layout</string>
-    <string name="setting_message_layout_dialog_title">Restart App?</string>
+    <string name="setting_restart_dialog_title">Restart App?</string>
-    <string name="setting_message_layout_dialog_message">The change will be effective on next app start.\n\nDo you want to restart now?</string>
+    <string name="setting_restart_dialog_message">The change will be effective on next app start.\n\nDo you want to restart now?</string>
-    <string name="setting_message_layout_dialog_button1">Restart</string>
+    <string name="setting_restart_dialog_button1">Restart</string>
-    <string name="setting_message_layout_dialog_button2">Later</string>
+    <string name="setting_restart_dialog_button2">Later</string>
     <string name="setting_time_format">Time format</string>
     <string name="setting_key_time_format">time_format</string>
+    <string name="setting_notifications">Notifications</string>
+    <string name="setting_notification_channels">Separate app notification channels</string>
+    <string name="setting_key_notification_channels">notification_channels</string>
     <string name="push_message">Push message</string>
     <string name="appListDescription">App:</string>
     <string name="priorityDescription">Priority:</string>
@@ -97,4 +100,10 @@
         <item quantity="one">in %d minute</item>
         <item quantity="other">in %d minutes</item>
     </plurals>
+
+    <string name="notification_channel_title_foreground">Gotify foreground notification</string>
+    <string name="notification_channel_title_min">Min priority messages (&lt;1)</string>
+    <string name="notification_channel_title_low">Low priority messages (1–3)</string>
+    <string name="notification_channel_title_normal">Normal priority messages (4–7)</string>
+    <string name="notification_channel_title_high">High priority messages (>7)</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -1,4 +1,4 @@
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
 
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.Material3.DayNight">
@@ -25,4 +25,8 @@
 
     <style name="AppTheme.PopupOverlay" parent="AppTheme" />
 
+    <style name="Preference.SwitchPreferenceCompat" parent="@style/Preference.SwitchPreferenceCompat.Material" tools:ignore="ResourceCycle">
+        <item name="widgetLayout">@layout/preference_switch</item>
+    </style>
+
 </resources>

app/src/main/res/xml/root_preferences.xml

@@ -24,4 +24,13 @@
             android:title="@string/setting_time_format" />
     </PreferenceCategory>
 
+    <PreferenceCategory app:title="@string/setting_notifications" >
+        <SwitchPreferenceCompat
+            android:enabled="false"
+            android:defaultValue="@bool/notification_channels"
+            android:key="@string/setting_key_notification_channels"
+            android:title="@string/setting_notification_channels"
+            app:singleLineTitle="false" />
+    </PreferenceCategory>
+
 </PreferenceScreen>