Add exclude from recents

Co-authored-by: Jannis Mattheis <contact@jmattheis.de>

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

@@ -1,6 +1,8 @@
 package com.github.gotify
 
 import android.app.Activity
+import android.app.ActivityManager
+import android.content.Context
 import android.content.res.Resources
 import android.graphics.Bitmap
 import android.graphics.drawable.BitmapDrawable
@@ -115,4 +117,9 @@ internal object Utils {
     fun interface DrawableReceiver {
         fun loaded(drawable: Drawable?)
     }
+
+    fun setExcludeFromRecent(context: Context, excludeFromRecent: Boolean) {
+        context.getSystemService(ActivityManager::class.java).appTasks?.getOrNull(0)
+            ?.setExcludeFromRecents(excludeFromRecent)
+    }
 }

app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt

@@ -22,6 +22,7 @@ import androidx.core.graphics.drawable.DrawableCompat
 import androidx.core.view.GravityCompat
 import androidx.drawerlayout.widget.DrawerLayout.SimpleDrawerListener
 import androidx.lifecycle.ViewModelProvider
+import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -150,6 +151,9 @@ internal class MessagesActivity :
                 }
             }
 
+        val excludeFromRecent = PreferenceManager.getDefaultSharedPreferences(this)
+            .getBoolean(getString(R.string.setting_key_exclude_from_recent), false)
+        Utils.setExcludeFromRecent(this, excludeFromRecent)
         launchCoroutine {
             updateMessagesForApplication(true, viewModel.appId)
         }

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

@@ -17,6 +17,7 @@ import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.PreferenceManager
 import androidx.preference.SwitchPreferenceCompat
 import com.github.gotify.R
+import com.github.gotify.Utils
 import com.github.gotify.databinding.SettingsActivityBinding
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 
@@ -72,16 +73,16 @@ internal class SettingsActivity : AppCompatActivity(), OnSharedPreferenceChangeL
 
         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 =
+            findPreference<ListPreference>(
+                getString(R.string.setting_key_message_layout)
+            )?.onPreferenceChangeListener =
                 Preference.OnPreferenceChangeListener { _, _ ->
                     showRestartDialog()
                     true
                 }
-            notificationChannels?.onPreferenceChangeListener =
+            findPreference<SwitchPreferenceCompat>(
+                getString(R.string.setting_key_notification_channels)
+            )?.onPreferenceChangeListener =
                 Preference.OnPreferenceChangeListener { _, _ ->
                     if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
                         return@OnPreferenceChangeListener false
@@ -89,6 +90,13 @@ internal class SettingsActivity : AppCompatActivity(), OnSharedPreferenceChangeL
                     showRestartDialog()
                     true
                 }
+            findPreference<SwitchPreferenceCompat>(
+                getString(R.string.setting_key_exclude_from_recent)
+            )?.onPreferenceChangeListener =
+                Preference.OnPreferenceChangeListener { _, value ->
+                    Utils.setExcludeFromRecent(requireContext(), value as Boolean)
+                    return@OnPreferenceChangeListener true
+                }
         }
 
         override fun onDisplayPreferenceDialog(preference: Preference) {

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

@@ -35,4 +35,5 @@
     <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>
+    <bool name="exclude_from_recent">false</bool>
 </resources>

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

@@ -83,6 +83,8 @@
     <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="setting_key_exclude_from_recent">exclude_from_recent</string>
+    <string name="setting_exclude_from_recent">Exclude from recents</string>
     <string name="push_message">Push message</string>
     <string name="appListDescription">App:</string>
     <string name="priorityDescription">Priority:</string>

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

@@ -22,6 +22,12 @@
             android:entryValues="@array/time_format_values"
             android:key="@string/setting_key_time_format"
             android:title="@string/setting_time_format" />
+
+        <SwitchPreferenceCompat
+            android:defaultValue="@bool/exclude_from_recent"
+            android:key="@string/setting_key_exclude_from_recent"
+            android:title="@string/setting_exclude_from_recent"
+            app:singleLineTitle="false" />
     </PreferenceCategory>
 
     <PreferenceCategory app:title="@string/setting_notifications" >