switch to TargetSDK 26, implement notification channels allowing customization of notification importance on Android 8, see #178

src/keepass2android/Properties/AndroidManifest_debug.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="46" android:versionName="0.9.3-release-3" package="keepass2android.keepass2android_debug" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="23" />
+	<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="26" />
 <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_online" android:label="KP2A choose autofill dataset" android:name="keepass2android.keepass2android_debug.permission.Kp2aChooseAutofill" android:protectionLevel="signature" />
 	<application android:label="keepass2android" android:icon="@drawable/ic_launcher">

src/keepass2android/Properties/AndroidManifest_net.xml

@@ -4,7 +4,7 @@
 			android:versionName="1.04" 
 			package="keepass2android.keepass2android" 
 			android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="23" />
+	<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="26" />
   <permission android:description="@string/permission_desc2" android:icon="@drawable/ic_launcher_online" 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_online" android:label="KP2A choose autofill dataset" android:name="keepass2android.keepass2android.permission.Kp2aChooseAutofill" android:protectionLevel="signature" />
   

src/keepass2android/Resources/values/strings.xml

@@ -689,6 +689,15 @@
 
   </string>
 
+  <string name="DbUnlockedChannel_name">Database unlocked</string>
+  <string name="DbUnlockedChannel_desc">Notification about the database being unlocked</string>
+  
+  <string name="DbQuicklockedChannel_name">QuickUnlock</string>
+  <string name="DbQuicklockedChannel_desc">Notification about the database being locked with QuickUnlock</string>
+  
+  <string name="EntryChannel_name">Entry notifications</string>
+  <string name="EntryChannel_desc">Notification to simplify access to the currently selected entry.</string>
+
   <string name="ErrorReportTitle">Keepass2Android: An error occurred.</string>
   <string name="ErrorReportText">An unexpected error occurred while running Keepass2Android. Please help us fix this by allowing the app to send error reports.</string>
   <string name="ErrorReportPromise">Error reports will never contain any contents of your database or master password. You can disable them in the application settings.</string>

src/keepass2android/app/App.cs

@@ -21,6 +21,7 @@ using System.IO;
 using System.Net.Security;
 using Android.App;
 using Android.Content;
+using Android.Graphics;
 using Android.Graphics.Drawables;
 using Android.OS;
 using Android.Runtime;
@@ -845,7 +846,11 @@ namespace keepass2android
 #endif
 	public class App : Application {
 
-		public App (IntPtr javaReference, JniHandleOwnership transfer)
+	    public const string NotificationChannelIdUnlocked = "channel_db_unlocked_3";
+	    public const string NotificationChannelIdQuicklocked = "channel_db_quicklocked_3";
+	    public const string NotificationChannelIdEntry = "channel_db_entry_3";
+
+        public App (IntPtr javaReference, JniHandleOwnership transfer)
 			: base(javaReference, transfer)
 		{
 		}
@@ -857,14 +862,53 @@ namespace keepass2android
 
 			Kp2aLog.Log("Creating application "+PackageName+". Version=" + PackageManager.GetPackageInfo(PackageName, 0).VersionCode);
 
+		    CreateNotificationChannels();
+
             Kp2a.OnCreate(this);
 			AndroidEnvironment.UnhandledExceptionRaiser += MyApp_UnhandledExceptionHandler;
 		}
 
+	    private void CreateNotificationChannels()
+	    {
+	        NotificationManager mNotificationManager =
+	            (NotificationManager)GetSystemService(Context.NotificationService);
 
-		
+	        {
-		
+	            string name = GetString(Resource.String.DbUnlockedChannel_name);
-		public override void OnTerminate() {
+	            string desc = GetString(Resource.String.DbUnlockedChannel_desc);
+	            NotificationChannel mChannel =
+	                new NotificationChannel(NotificationChannelIdUnlocked, name, NotificationImportance.Low);
+	            mChannel.Description = desc;
+	            mChannel.EnableLights(false);
+	            mChannel.EnableVibration(false);
+	            mNotificationManager.CreateNotificationChannel(mChannel);
+	        }
+
+	        {
+	            string name = GetString(Resource.String.DbQuicklockedChannel_name);
+	            string desc = GetString(Resource.String.DbQuicklockedChannel_desc);
+	            NotificationChannel mChannel =
+	                new NotificationChannel(NotificationChannelIdQuicklocked, name, NotificationImportance.Min);
+	            mChannel.Description = desc;
+	            mChannel.EnableLights(false);
+	            mChannel.EnableVibration(false);
+	            mNotificationManager.CreateNotificationChannel(mChannel);
+	        }
+
+	        {
+	            string name = GetString(Resource.String.EntryChannel_name);
+	            string desc = GetString(Resource.String.EntryChannel_desc);
+	            NotificationChannel mChannel =
+	                new NotificationChannel(NotificationChannelIdEntry, name, NotificationImportance.None);
+	            mChannel.Description = desc;
+	            mChannel.EnableLights(false);
+	            mChannel.EnableVibration(false);
+	            mNotificationManager.CreateNotificationChannel(mChannel);
+	        }
+        }
+
+
+        public override void OnTerminate() {
 			base.OnTerminate();
 			Kp2aLog.Log("Terminating application");
             Kp2a.OnTerminate();

src/keepass2android/services/CopyToClipboardService.cs

@@ -198,7 +198,7 @@ namespace keepass2android
 					pending = GetPendingIntent(intentText, descResId);
 				}
 
-				var builder = new NotificationCompat.Builder(_ctx);
+				var builder = new NotificationCompat.Builder(_ctx, App.NotificationChannelIdEntry);
 				builder.SetSmallIcon(drawableResId)
 					   .SetContentText(desc)
 					   .SetContentTitle(entryName)

src/keepass2android/services/OngoingNotificationsService.cs

@@ -139,7 +139,7 @@ namespace keepass2android
 				grayIconResouceId = Resource.Drawable.transparent;
 			}
 			NotificationCompat.Builder builder = 
-				new NotificationCompat.Builder(this)
+				new NotificationCompat.Builder(this, App.NotificationChannelIdQuicklocked)
 					.SetSmallIcon(grayIconResouceId)
 					.SetLargeIcon(MakeLargeIcon(BitmapFactory.DecodeResource(Resources, AppNames.NotificationLockedIcon)))
 					.SetVisibility((int)Android.App.NotificationVisibility.Secret)
@@ -183,7 +183,7 @@ namespace keepass2android
 		private Notification GetUnlockedNotification()
 		{
 			NotificationCompat.Builder builder =
-				new NotificationCompat.Builder(this)
+				new NotificationCompat.Builder(this, App.NotificationChannelIdUnlocked)
 					.SetOngoing(true)
 					.SetSmallIcon(Resource.Drawable.ic_notify)
 					.SetLargeIcon(MakeLargeIcon(BitmapFactory.DecodeResource(Resources, AppNames.NotificationUnlockedIcon)))