Add Quick Settings tile support

src/keepass2android-app/Manifests/AndroidManifest_debug.xml

@@ -59,7 +59,7 @@
   </queries>
 
 
-  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="35" />
+  <uses-sdk android:minSdkVersion="24" android:targetSdkVersion="35" />
   <permission android:description="@string/permission_desc2" android:icon="@drawable/ic_notify_locked" android:label="KP2A entry search" android:name="keepass2android.keepass2android_debug.permission.KP2aInternalSearch" android:protectionLevel="signature" />
   <permission android:description="@string/permission_desc3" android:icon="@drawable/ic_launcher" android:label="KP2A choose autofill dataset" android:name="keepass2android.keepass2android_debug.permission.Kp2aChooseAutofill" android:protectionLevel="signature" />
   <application
@@ -281,6 +281,16 @@ The scheme=file is still there for old OS devices. It's also queried by apps lik
     <meta-data android:name="com.sec.android.multiwindow.DEFAULT_SIZE_H" android:value="598.0dip" />
     <meta-data android:name="com.sec.android.multiwindow.MINIMUM_SIZE_W" android:value="426.0dip" />
     <meta-data android:name="com.sec.android.multiwindow.MINIMUM_SIZE_H" android:value="360.0dip" />
+    <service
+      android:name="keepass2android.QuickSettingsTileService"
+      android:icon="@drawable/ic_quick_settings_tile"
+      android:label="@string/app_name"
+      android:permission="android.permission.BIND_QUICK_SETTINGS_TILE"
+      android:exported="true">
+      <intent-filter>
+          <action android:name="android.service.quicksettings.action.QS_TILE" />
+      </intent-filter>
+    </service>	  
   </application>
   <uses-permission android:name="android.permission.VIBRATE" />
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

src/keepass2android-app/Manifests/AndroidManifest_net.xml

@@ -58,7 +58,7 @@
       <action android:name="android.intent.action.VIEW" />
     </intent>
   </queries>
-  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="35" />
+   <uses-sdk android:minSdkVersion="24" android:targetSdkVersion="35" />
 
   <permission android:description="@string/permission_desc2" android:icon="@drawable/ic_launcher" android:label="KP2A entry search" android:name="keepass2android.keepass2android.permission.KP2aInternalSearch" android:protectionLevel="signature" />
   <permission android:description="@string/permission_desc3" android:icon="@drawable/ic_launcher" android:label="KP2A choose autofill dataset" android:name="keepass2android.keepass2android.permission.Kp2aChooseAutofill" android:protectionLevel="signature" />
@@ -290,6 +290,16 @@ The scheme=file is still there for old OS devices. It's also queried by apps lik
     <meta-data android:name="com.sec.android.multiwindow.DEFAULT_SIZE_H" android:value="598.0dip" />
     <meta-data android:name="com.sec.android.multiwindow.MINIMUM_SIZE_W" android:value="426.0dip" />
     <meta-data android:name="com.sec.android.multiwindow.MINIMUM_SIZE_H" android:value="360.0dip" />
+    <service
+      android:name="keepass2android.QuickSettingsTileService"
+      android:icon="@drawable/ic_quick_settings_tile"
+      android:label="@string/app_name"
+      android:permission="android.permission.BIND_QUICK_SETTINGS_TILE"
+      android:exported="true">
+      <intent-filter>
+          <action android:name="android.service.quicksettings.action.QS_TILE" />
+      </intent-filter>
+    </service>
   </application>
   <uses-permission android:name="android.permission.VIBRATE" />
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

src/keepass2android-app/Manifests/AndroidManifest_nonet.xml

@@ -58,7 +58,7 @@
       <action android:name="android.intent.action.VIEW" />
     </intent>
   </queries>
-  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="35" />
+  <uses-sdk android:minSdkVersion="24" android:targetSdkVersion="35" />
 
   <permission android:description="@string/permission_desc2" android:icon="@drawable/ic_launcher_offline" android:label="KP2A entry search" android:name="keepass2android.keepass2android_nonet.permission.KP2aInternalSearch" android:protectionLevel="signature" />
   <permission android:description="@string/permission_desc3" android:icon="@drawable/ic_launcher_offline" android:label="KP2A choose autofill dataset" android:name="keepass2android.keepass2android_nonet.permission.Kp2aChooseAutofill" android:protectionLevel="signature" />
@@ -266,6 +266,16 @@ The scheme=file is still there for old OS devices. It's also queried by apps lik
     <meta-data android:name="com.sec.android.multiwindow.DEFAULT_SIZE_H" android:value="598.0dip" />
     <meta-data android:name="com.sec.android.multiwindow.MINIMUM_SIZE_W" android:value="426.0dip" />
     <meta-data android:name="com.sec.android.multiwindow.MINIMUM_SIZE_H" android:value="360.0dip" />
+    <service
+      android:name="keepass2android.QuickSettingsTileService"
+      android:icon="@drawable/ic_quick_settings_tile"
+      android:label="@string/app_name"
+      android:permission="android.permission.BIND_QUICK_SETTINGS_TILE"
+      android:exported="true">
+      <intent-filter>
+          <action android:name="android.service.quicksettings.action.QS_TILE" />
+      </intent-filter>
+    </service>
   </application>
   <uses-permission android:name="android.permission.VIBRATE" />
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

src/keepass2android-app/QuickSettingsTileService.cs

@@ -0,0 +1,69 @@
+/*
+ * Keepass2Android - Password Manager for Android
+ * Copyright (C) 2026 Philipp Crocoll
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * ---
+ * Module: QuickSettingsTileService
+ * Description: Provides a system-wide Quick Settings Tile to launch the application.
+ * This service allows users to quickly access their password database from the 
+ * Android notification shade.
+ */
+
+using System;
+using Android.App;
+using Android.Content;
+using Android.Service.QuickSettings;
+
+namespace keepass2android
+{
+    /// <summary>
+    /// Service to provide a Quick Settings Tile for the Android notification shade.
+    /// </summary>
+    [Service(Name = "keepass2android.QuickSettingsTileService",
+             Permission = Android.Manifest.Permission.BindQuickSettingsTile,
+             Label = "@string/app_name", 
+             Icon = "@drawable/ic_quick_settings_tile", 
+             Exported = true)]
+    [IntentFilter(new[] { TileService.ActionQsTile })]
+    public class QuickSettingsTileService : TileService
+    {
+        public override void OnClick()
+        {
+            base.OnClick();
+
+            if (IsLocked)
+            {
+                // Ensures the device is unlocked before attempting to show the UI.
+                UnlockAndRun(new Java.Lang.Runnable(StartKp2a));
+            }
+            else
+            {
+                StartKp2a();
+            }
+        }
+
+        private void StartKp2a()
+        {
+            // Use the verified entry point: SelectCurrentDbActivity.
+            Intent intent = new Intent(this, typeof(SelectCurrentDbActivity));
+
+            // MANDATORY: Services must launch activities in a New Task to avoid crashes.
+            intent.AddFlags(ActivityFlags.NewTask);
+
+            // Closes the notification shade and executes the intent.
+            StartActivityAndCollapse(intent);
+        }
+    }
+}

src/keepass2android-app/Resources/drawable/ic_quick_settings_tile.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?android:attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M18,8H17V6A5,5 0 0,0 12,1A5,5 0 0,0 7,6V8H6A2,2 0 0,0 4,10V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V10A2,2 0 0,0 18,8M9,6A3,3 0 0,1 12,3A3,3 0 0,1 15,6V8H9V6M18,20H6V10H18V20M12,13A2,2 0 0,0 10,15A2,2 0 0,0 12,17A2,2 0 0,0 14,15A2,2 0 0,0 12,13Z" />
+</vector>