Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
Developer Community or GitHub with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Created attachment 9704 [details]
source code for one ContentPage with one button, example of the bug
bool result = await DisplayAlert("Proceed?", "Would you like to proceed?", "Accept", "Cancel");
await DisplayAlert("", "Selected: Accept", "OK");
await DisplayAlert("", "Selected: Cancel", "OK");
If an user taps the "Cancel" button, it works as expected.
But if an user presses the physical BACK button,
the dialog itself disappears, but the code in 'if' statement does not execute
and the app has no idea that the dialog has been dismissed.
I made a suggestion how to fix it in the forum page: https://forums.xamarin.com/discussion/comment/94987/#Comment_94987
To briefly repeat: implementation in Xamarin.Forms.Platform.Android.AndroidActivity and Xamarin.Forms.Platform.Android.FormsApplicationActivity is missing the event handler for CancelEvent:
alertDialog.CancelEvent += (o, args) => arguments.SetResult(false);
MessagingCenter.Subscribe<Page, AlertArguments>((object) this, "Xamarin.SendAlert", (System.Action<Page, AlertArguments>) ((sender, arguments) =>
AlertDialog alertDialog = new AlertDialog.Builder((Context) this).Create();
if (arguments.Accept != null)
alertDialog.SetButton(-1, arguments.Accept, (EventHandler<DialogClickEventArgs>) ((o, args) => arguments.SetResult(true)));
alertDialog.SetButton(-2, arguments.Cancel, (EventHandler<DialogClickEventArgs>) ((o, args) => arguments.SetResult(false)));
}), (Page) null);
I have checked this issue and able to reproduce this issue.
When I open the alert box and press the back button I observed that the disappears from the screen.
IDE logs: https://gist.github.com/RamChBachkheti/626c2f8b16f500562e33
Device logs: https://gist.github.com/RamChBachkheti/b0d768b2a8166dbb8ed9
Microsoft Visual Studio Professional 2013
Version 12.0.30723.00 Update 3
Microsoft .NET Framework
Installed Version: Professional
LightSwitch for Visual Studio 2013 06177-004-0447006-02641
Microsoft LightSwitch for Visual Studio 2013
Team Explorer for Visual Studio 2013 06177-004-0447006-02641
Microsoft Team Explorer for Visual Studio 2013
Visual Basic 2013 06177-004-0447006-02641
Microsoft Visual Basic 2013
Visual C# 2013 06177-004-0447006-02641
Microsoft Visual C# 2013
Visual C++ 2013 06177-004-0447006-02641
Microsoft Visual C++ 2013
Visual F# 2013 06177-004-0447006-02641
Microsoft Visual F# 2013
Visual Studio 2013 Code Analysis Spell Checker 06177-004-0447006-02641
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker
Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.
The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.
Windows Phone SDK 8.0 - ENU 06177-004-0447006-02641
Windows Phone SDK 8.0 - ENU
Application Insights Tools for Visual Studio Package 1.0
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 12.3.50717.0
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Microsoft Azure Websites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Microsoft Azure
ASP.NET Web Frameworks and Tools 2012.2 4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563
ASP.NET Web Frameworks and Tools 2013 5.2.20703.0
For additional information, visit http://www.asp.net/
Common Azure Tools 1.2
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
Microsoft Advertising SDK for Windows Phone
Microsoft Advertising SDK for Windows Phone
Microsoft Azure Mobile Services Tools 1.2
Microsoft Azure Mobile Services Tools
NuGet Package Manager 2.8.50926.663
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
Office Developer Tools for Visual Studio 2013 ENU 12.0.30626
Microsoft Office Developer Tools for Visual Studio 2013 ENU
PowerShell Tools 1.2
Provides file classification services using PowerShell
PreEmptive Analytics Visualizer 1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.
SQL Server Data Tools 12.0.30919.1
Microsoft SQL Server Data Tools
Windows Phone 8.1 SDK Integration 1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.
Workflow Manager Tools 1.0 1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.
Xamarin 3.9.291.0 (9f3e552)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 126.96.36.199 (49a04b966feb40dfdba49d57ba16249b66d606a6)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 188.8.131.52 (3b3ef438017c7ecf486defa9e01567a5f2b3cb2a)
Visual Studio extension to enable development for Xamarin.iOS.
Xamarin.iOS Unified Migration 1.0
Automated migration for Xamarin iOS Classic projects to Unified
It should also not allow you to touch outside of it which currently makes it disappear.
Should be fixed in 1.3.4. Touch outside is how android alerts are meant to work, it is equal to the cancel action.
From alemarko comments on the thread:
"This also fixes the touches from the outside of the dialog => now they also behave as the cancel button press. Preventing outside touches altogether can be done, and personally I would like that (though maybe this could be done as a user settable global setting for Android apps based on Xamarin.Forms: developers could enable outside touches if required):
Any chance you could add this also. Most modal dialogs only allow you to use the buttons and input fields that are presented.