improve app stability and refactor to get better logs

src/Kp2aAutofillParser/AutofillParser.cs

@@ -476,8 +476,16 @@ namespace Kp2aAutofillParser
 
             foreach (var field in autofillFields.HintMap.Values.Distinct())
             {
+                if (field == null || field.AutofillHints == null)
+                {
+                    continue;
+                }
                 foreach (var hint in field.AutofillHints)
                 {
+                    if (hint == null)
+                    {
+                        continue;
+                    }
                     if (GetPartitionIndex(hint) == partitionIndex)
                     {
                         filteredCollection.Add(field);

src/Kp2aBusinessLogic/Utils/ExceptionUtil.cs

@@ -15,7 +15,14 @@ namespace KeePass.Util
             string errorMessage = e.Message;
             if (e is Java.Lang.Exception javaException)
             {
-                errorMessage = javaException.LocalizedMessage ?? javaException.Message ?? errorMessage;
+                try
+                {
+                    errorMessage = javaException.LocalizedMessage ?? javaException.Message ?? errorMessage;
+                }
+                finally
+                {
+
+                }
             }
 
             return errorMessage;

src/keepass2android-app/AppKilledInfo.cs

@@ -14,7 +14,7 @@ using keepass2android;
 
 namespace keepass2android
 {
-	[Activity(Label = AppNames.AppName)]
+	[Activity(Label = AppNames.AppName, Theme = "@style/Kp2aTheme_BlueNoActionBar")]
 	public class AppKilledInfo : Activity, IDialogInterfaceOnDismissListener
 	{
 		protected override void OnCreate(Bundle bundle)

src/keepass2android-app/GroupBaseActivity.cs

@@ -894,9 +894,14 @@ namespace keepass2android
                     RegisterInfoTextDisplay(
                         "DbReadOnly"); //this ensures that we don't show the general info texts too soon
 
-                    FindViewById<TextView>(Resource.Id.dbreadonly_infotext_text).Text =
+                    var infotext_view = FindViewById<TextView>(Resource.Id.dbreadonly_infotext_text);
-                    (GetString(Resource.String.FileReadOnlyMessagePre) + " " +
+                    if (infotext_view != null)
-                     App.Kp2a.GetResourceString(reason.Result));
+                    {
+                        infotext_view.Text =
+                            (GetString(Resource.String.FileReadOnlyMessagePre) + " " +
+                             App.Kp2a.GetResourceString(reason.Result));
+                    }
+                    
                 }
             }
             UpdateBottomBarElementVisibility(Resource.Id.dbreadonly_infotext, canShow);

src/keepass2android-app/app/App.cs

@@ -1245,7 +1245,7 @@ namespace keepass2android
 	    {
 	        var db = TryFindDatabaseForElement(element);
             if (db == null)
-                throw new Exception("Database element not found!");
+                throw new Exception($"Database element {element.Uuid} not found in any of {OpenDatabases.Count()} databases!");
 	        return db;
 	    }
 

src/keepass2android-app/app/AppTask.cs

@@ -15,6 +15,7 @@ using Android.Content.Res;
 using Android.Preferences;
 using Google.Android.Material.Dialog;
 using keepass2android;
+using PluginTOTP;
 
 namespace keepass2android
 {
@@ -638,19 +639,7 @@ namespace keepass2android
 
             if (CopyTotpToClipboard && isTotpEntry)
             {
-                Dictionary<string, string> entryFields = pwEntryOutput.OutputStrings.ToDictionary(pair => StrUtil.SafeXmlString(pair.Key), pair => pair.Value.ReadString());
+                DoCopyTotpToClipboard(activity, pwEntryOutput, totpPluginAdapter);
-                var totpData= totpPluginAdapter.GetTotpData(entryFields, activity, true);
-                if (totpData.IsTotpEntry)
-                {
-                    TOTPProvider prov = new TOTPProvider(totpData);
-                    string totp = prov.GenerateByByte(totpData.TotpSecret);
-                    CopyToClipboardService.CopyValueToClipboardWithTimeout(activity, totp, true);
-
-                    App.Kp2a.ShowMessage(activity, activity.GetString(Resource.String.TotpCopiedToClipboard),
-                         MessageSeverity.Info);
-                }
-
-                
             }
 
             if (CloseAfterCreate)
@@ -661,7 +650,23 @@ namespace keepass2android
                 activity.CloseAfterTaskComplete();	
 			}
 		}
-	}
+
+        private static void DoCopyTotpToClipboard(EntryActivity activity, PwEntryOutput pwEntryOutput,
+            ITotpPluginAdapter? totpPluginAdapter)
+        {
+            Dictionary<string, string> entryFields = pwEntryOutput.OutputStrings.ToDictionary(pair => StrUtil.SafeXmlString(pair.Key), pair => pair.Value.ReadString());
+            var totpData = totpPluginAdapter.GetTotpData(entryFields, activity, true);
+            if (totpData.IsTotpEntry)
+            {
+                TOTPProvider prov = new TOTPProvider(totpData);
+                string totp = prov.GenerateByByte(totpData.TotpSecret);
+                CopyToClipboardService.CopyValueToClipboardWithTimeout(activity, totp, true);
+
+                App.Kp2a.ShowMessage(activity, activity.GetString(Resource.String.TotpCopiedToClipboard),
+                    MessageSeverity.Info);
+            }
+        }
+    }
 
 
 	/// <summary>

src/keepass2android-app/services/AutofillBase/ChooseForAutofillActivityBase.cs

@@ -189,7 +189,7 @@ namespace keepass2android.services.AutofillBase
         {
             var intent = Intent;
             AssistStructure structure = (AssistStructure)intent.GetParcelableExtra(AutofillManager.ExtraAssistStructure);
-            if (structure == null)
+            if (structure == null || clientFormDataMap == null)
             {
                 SetResult(Result.Canceled);
                 Finish();