Fix Progress dialog crash on tombstoning (#1682)

* Changed ProgressDialog because deprecated and improved the dismissal of the dialog in order for it not to crash the app on certain situations

* Removed android version check given that our minimum is greater that the check

src/Android/Services/DeviceActionService.cs

@@ -13,6 +13,7 @@ using Android.OS;
 using Android.Provider;
 using Android.Text;
 using Android.Text.Method;
+using Android.Views;
 using Android.Views.Autofill;
 using Android.Views.InputMethods;
 using Android.Webkit;
@@ -27,6 +28,7 @@ using Bit.Core.Enums;
 using Bit.Core.Models.View;
 using Bit.Core.Utilities;
 using Bit.Droid.Autofill;
+using Bit.Droid.Utilities;
 using Plugin.CurrentActivity;
 
 namespace Bit.Droid.Services
@@ -37,7 +39,9 @@ namespace Bit.Droid.Services
         private readonly IMessagingService _messagingService;
         private readonly IBroadcasterService _broadcasterService;
         private readonly Func<IEventService> _eventServiceFunc;
-        private ProgressDialog _progressDialog;
+        private AlertDialog _progressDialog;
+        object _progressDialogLock = new object();
+
         private bool _cameraPermissionsDenied;
         private Toast _toast;
         private string _userAgent;
@@ -108,22 +112,101 @@ namespace Bit.Droid.Services
             {
                 await HideLoadingAsync();
             }
-            var activity = (MainActivity)CrossCurrentActivity.Current.Activity;
-            _progressDialog = new ProgressDialog(activity);
-            _progressDialog.SetMessage(text);
-            _progressDialog.SetCancelable(false);
+
+            var activity = CrossCurrentActivity.Current.Activity;
+            var inflater = (LayoutInflater)activity.GetSystemService(Context.LayoutInflaterService);
+            var dialogView = inflater.Inflate(Resource.Layout.progress_dialog_layout, null);
+            
+            var txtLoading = dialogView.FindViewById<TextView>(Resource.Id.txtLoading);
+            txtLoading.Text = text;
+            txtLoading.SetTextColor(ThemeHelpers.TextColor);
+
+            _progressDialog = new AlertDialog.Builder(activity)
+                .SetView(dialogView)
+                .SetCancelable(false)
+                .Create();
             _progressDialog.Show();
         }
 
         public Task HideLoadingAsync()
         {
-            if (_progressDialog != null)
+            // Based on https://github.com/redth-org/AndHUD/blob/master/AndHUD/AndHUD.cs
+            lock (_progressDialogLock)
             {
-                _progressDialog.Dismiss();
-                _progressDialog.Dispose();
-                _progressDialog = null;
+                if (_progressDialog is null)
+                {
+                    return Task.CompletedTask;
+                }
+
+                void actionDismiss()
+                {
+                    try
+                    {
+                        if (IsAlive(_progressDialog) && IsAlive(_progressDialog.Window))
+                        {
+                            _progressDialog.Hide();
+                            _progressDialog.Dismiss();
+                        }
+                    }
+                    catch
+                    {
+                        // ignore
+                    }
+
+                    _progressDialog = null;
+                }
+
+                // First try the SynchronizationContext
+                if (Application.SynchronizationContext != null)
+                {
+                    Application.SynchronizationContext.Send(state => actionDismiss(), null);
+                    return Task.CompletedTask;
+                }
+
+                // Otherwise try OwnerActivity on dialog
+                var ownerActivity = _progressDialog?.OwnerActivity;
+                if (IsAlive(ownerActivity))
+                {
+                    ownerActivity.RunOnUiThread(actionDismiss);
+                    return Task.CompletedTask;
+                }
+
+                // Otherwise try get it from the Window Context
+                if (_progressDialog?.Window?.Context is Activity windowActivity && IsAlive(windowActivity))
+                {
+                    windowActivity.RunOnUiThread(actionDismiss);
+                    return Task.CompletedTask;
+                }
+
+                // Finally if all else fails, let's see if current activity is MainActivity
+                if (CrossCurrentActivity.Current.Activity is MainActivity activity && IsAlive(activity))
+                {
+                    activity.RunOnUiThread(actionDismiss);
+                    return Task.CompletedTask;
+                }
+
+                return Task.CompletedTask;
             }
-            return Task.FromResult(0);
+        }
+
+        bool IsAlive(Java.Lang.Object @object)
+        {
+            if (@object == null)
+                return false;
+
+            if (@object.Handle == IntPtr.Zero)
+                return false;
+
+            if (@object is Activity activity)
+            {
+                if (activity.IsFinishing)
+                    return false;
+
+                if (activity.IsDestroyed)
+                    return false;
+            }
+
+            return true;
         }
 
         public bool OpenFile(byte[] fileData, string id, string fileName)