Category Archives: Xamarin.Forms

Pre-release: Xamarin.Forms 2.3.5.256-pre6

Xamarin.Forms 2.3.5.256-pre6 is now on NuGet. To install the pre-release, check the pre-release option in your NuGet package manager and install this version.

If you have a bug to report, drop us a detailed report here so we can troubleshoot.

Important notes

  • Xamarin.Forms is now compatible with .NET Standard projects! Not all build features may work.
  • Behavior change: Device.RuntimePlatform now returns WinRT on WinRT and UWP on UWP.
  • Behavior change: Using the new AutomationProperties may impact UI Test execution on Android. AutomationId, Name, and HelpText will all set the native ContentDescription property, with Name and/or HelpText taking precedence over AutomationId (Name and HelpText will be concatenated). This means that any tests looking for AutomationId will now fail if Name and/or HelpText are also set on that element. To work around this issue, please alter your UI Tests to look for the value of Name/HelpText in this scenario.
  • Behavior change: Calling Focus on a Picker on WinRT/UWP will now open the drop down.
  • Deprecation: Android IVisualElementRenderer.ViewGroup is now obsolete. Please use View instead.

2.3.5.256-pre6

  • 56795 – “DataTriggers do not work on UWP in RELEASE mode”

2.3.5.255-pre5

  • [Android] Dispose check before setting properties on Button (PR)
  • 36031 – “Button border not drawn on Android without a BorderRadius” (PR)
  • 57717 – “Setting background color on Button in Android FormsApplicationActivity causes NRE” (PR)
  • 57749 – “[UWP] After enabling a disabled button it is not clickable” (PR)
  • [Android] Dispose check on FastButtonRenderer to prevent crash (PR)
  • [Android] Set the Id field for Android Views created by Forms (PR)
  • 55588 – “Cannot open more than one ContextAction in different ListViews on IOS” (PR)
  • 56444 – “A small ”dot“ shows up as value in Android labels when the value is null/empty.” (PR)
  • 56895 – “VS2017 stable – previewer exception crash- no method found Button_click on type” (PR)
  • 56896 – “ListViews for lists with many elements regressed in performance on iOS” (PR)
  • 57108 – “Fix possible crash on API 21+ at launch when using Holo theme and FormsApplicationActivity” (PR)

2.3.5.239-pre3

Nuget package here.

  • [All] Rename Accessibility -> AutomationProperties (PR)
  • [Core] fix BP declaring Types for A11y (PR)
  • [Android] Add disposed check on FastRenderers.FrameRenderer (PR)
  • [Android] Add disposed check on FastRenderers.LabelRenderer (PR)
  • [Android] Add disposed check on FastRenderers.VisualElementRenderer (PR)
  • 45602 – “NullPointerException when applying style” (PR)
  • 54717 – “System.NullReferenceException Xamarin.Forms.Platform.Android.PlatformConfigurationExtensions.OnThisPlatform[T] (T element)” (PR)
  • 55542 – “View in Master Content Page stops loading ListView in Detail” (PR)
  • 55559 – “Exception when set the backgroundcolor of the frame on a property change event” (PR)
  • 55636 – “OnPlatform doesn’t work on UWP when compiling with .NET Native” (PR)
  • 55745 – “[iOS] NRE in ListView with HasUnevenRows=true after changing content and rebinding” (PR)
  • 55912 – “Tap event not always propagated to containing Grid/StackLayout” (PR)
  • 56079 – “Accessibility Support doesn’t work in XAML” (PR)

2.3.5.235-pre2

Nuget package here.

  • [Evolution] – “[Xaml] OnPlatform.Default value” (PR)
  • [Android] Make OnElementPropertyChanged virtual on fast renderers (PR)
  • [Android] Verify FragmentContainer created when queueing fragment transaction (Android) (PR)
  • [iOS] Prevent NRE in ListView OnItemSelected (PR)
  • 51173 – “ImageRenderer, async void SetImage – Cannot catch exceptions” (PR)
  • 55027 – “Xaml compilation can’t handle folders in namespaces” (PR)
  • 55096 – “Binding with nested class does not working on XAML.” (PR)
  • 55230 – “setStateListAnimator TargetInvocationException Crash in 2.3.5.233-pre1” (PR)
  • 55347 – “Exception when using static resource Thickness in 2.3.5-pre1 with XamlC” (PR)
  • [Internal] README: add macOS to list of supported platforms (PR)
  • [Internal] Add netstandard group to nuspec (PR)

2.3.5.233-pre1

Nuget package here.

Enhancements & Other Changes

  • [Evolution] – MacOS (PR)
  • [Evolution] – Basic Accessibility Support (PR)
  • [Evolution] – “[Enhancement] Map renderer extensibility” (PR)
  • [All] Add pressed and released events to Button (PR)
  • [All] Move XF.ConcurrentDictionary to WP8 project (PR)
  • [All] Reduce overhead of pushing existing navigation stack (PR)
  • [Android] Added Section indexes when FastScrolled is enabled (PR)
  • [Android] Fast Renderers (PR)
  • [Android] Fix NRE when RecycleElement is on and list is scrolled quickly on Android (PR)
  • [Android] Fixed issue where Android Hints were causing a “.” to be placed on al… (PR)
  • [Android] Small performance fixes to ListViewRenderer, PlatformSpecific IsFastScrollEnabled (PR)
  • [Android] UI tests for InputTransparent and fixes for Android/Windows (PR)
  • [Core] Add default parameter value of zero to INavigationPageController.Peek() (PR)
  • [Core] Add TV to TargetIdiom (PR)
  • [Core] Added RootPage to NavigationPage (PR)
  • [Core] Align iOS, Android, Windows handling of tap gesture event bubbling (PR)
  • [Core] Fix internal children clear logic (PR)
  • [Core] fix NIE in Span (PR)
  • [Core] ITextElement and TextElement (PR)
  • [Core] move the Font proxying into FontElement (PR)
  • [Core] Share BP across IFontElement implementors (PR)
  • [Core] Split Windows RuntimePlatform into UWP and WinRT (PR)
  • [Core] support more color format in ColorTypeConverter (PR)
  • [Core] Update RelativeLayout to make it respond to constraint changes (PR)
  • [Internal] Fix accessibility gallery (PR)
  • [iOS, Android] Throw InvalidOperationException when ViewCell View is null (PR)
  • [iOS] Dispose Entry and Editor properly and automate GC checks (PR)
  • [iOS] Dispose pickers properly and automate GC checks (PR)
  • [iOS] Expose row animation properties in ListViewRenderer (PR)
  • [iOS] Fix for nullreferenceexception in TabbedRenderer on iOS when it has are no children (yet) (PR)
  • [iOS] Fix obsolete constructor in ContextActionCell (PR)
  • [iOS] Inherit Transitioning Delegate from Child (ModalWrapper) (PR)
  • [iOS] TabbedRenderer / load icons from custom sources (from embedded svg for example) (PR)
  • [macOS] Adds Scrollbars to ListViews and ScrollViews (PR)
  • [macOS] Fixed Tab NSImage crash in TabbedPageRenderer (PR)
  • [Xaml] decorate markup and value providers to speed up inflating (PR)
  • [Xaml] empty service provider (PR)
  • [Xaml] no longer require a ServiceProvider for Trigger and PropertyCo… (PR)
  • [Xaml] Null compiled markup (PR)
  • [Xaml] Resource loading (PR)
  • [XamlC] compile ListStringTypeConverter (PR)
  • [XamlC] compiled TypeExtension (PR)
  • [XamlC] complete the Setter/Trigger fix (PR)
  • [XamlC] debug (PR)
  • [XamlC] Fix debugging tests (PR)
  • [XamlC] supports ‘using:’ xmlns declarations (PR)

Bug Fixes

  • 27194 – “Possible Memory Leak with ContextAction” (PR)
  • 27731 – “[Android] Action Bar can not be controlled reliably on MasterDetailPage” (PR)
  • 29247 – “iOS Device.OpenUri breaks with encoded params” (PR)
  • 30166 – “Problem with NavigationBar.BarBackgroundColor on Lollipop” (PR)
  • 31415 – “ListView Does Not Update After GC When Collection Uses Weak References” (PR)
  • 32206 – “ContextActions cause memory leak: Page is never destroyed” (PR)
  • 32847 – “Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker” (PR)
  • 32865 – “On MasterDetailPage trying to change Icon of Master page doesn’t work if another view is pushed and Image is renderer in blue” (PR)
  • 32956 – “Setting ListView.SelectedItem to null does not remove list item highlight when list item is tapped multiple times quickly” (PR)
  • 39407 – “Picker wrong SelectedIndex value” (PR)
  • 40139 – “Changing the Windows 10 System Theme Color causes ListView text to disappear.” (PR)
  • 40251 – “Cannot style Buttons natively using UIButton.Appearance” (PR)
  • 40906 – “CDATA ignored in XAML layout” (PR)
  • 41600 – “ListView.ScrollTo does not behave as per documentation on UWP” (PR)
  • 41619 – “After updating to lastest Xamarin for VS 2015, the UWP Slider Value binding no longer works” (PR)
  • 41778 – “Slider Inside ScrollView Will Open MasterDetailPage.Master” (PR)
  • 41900 – “UWP Map on navigated Page can’t change size.” (PR)
  • 41919 – “SearchBar crash because set FontFamily in UWP global FontFamily style” (PR)
  • 42000 – “Unable to use comma (”,") as decimal point" (PR)
  • 42084 – “Entry Bound to a Double Does Not Accept ‘,’ As Decimal Separator” (PR)
  • 42151 – “UWP Map VisibleRegion is calculated incorrectly” (PR)
  • 42678 – “[Android] System.ObjectDisposedException when tapping a toolbar button after switching tabs.” (PR)
  • 43007 – “Controls nested in StackLayout need to inherit IsEnabled property” (PR)
  • 43519 – “[UWP] MasterDetail page ArguementException when nested in a TabbedPage and returning from modal page” (PR)
  • 43527 – “Page title does not change when Title property is set in code or via binding to a ViewModel” (PR)
  • 43694 – “StaticResource does not work for x:String and OnPlatform” (PR)
  • 43783 – “Most Device Styles do not render correctly in Windows Phone 8.1 (RT) applications” (PR)
  • 43867 – “Numeric keyboard shows text / default keyboard when back button is hit” (PR)
  • 43941 – “Memory leak with ListView’s RecycleElement on iOS” (PR)
  • 44047 – “Memory leak when using SetBackButtonTitle on iOS” (PR)
  • 44096 – “Grid, StackLayout, and ContentView do not pass IsEnabled changes to their children on Android” (PR)
  • 44176 – “InputTransparent fails if BackgroundColor not explicitly set on Android” (PR)
  • 44213 – “Can’t bind to specific properties through OnPlatform” (PR)
  • 44216 – “No property, bindable property, or event found Wen using xamlc” (PR)
  • 44525 – “Xamarin.Forms Listview Row Height Does Not Adapt In iOS” (PR)
  • 44940 – “ScrollToAsync memory leak on UWP” (PR)
  • 44955 – “UWP: Setting Entry BackgroundColor via Behavior results in sticky unfocused background color” (PR)
  • 44980 – “ActivityIndicator disappears when scrolling” (PR)
  • 45027 – “App crashes when double tapping on ToolbarItem or MenuItem very quickly” (PR)
  • 45067 – “No way of cleanly dismissing soft keyboard in UWP” (PR)
  • 45284 – “Extra tab icons display in iOS when binding Title on TabbedPage” (PR)
  • 45179 – “Views in DataTemplate’s are being created without the template ever loading.” (PR)
  • 45277 – “On UWP, Entry with IsPassword = true does not allow selection of characters” (PR)
  • 45299 – “Using a custom TypeConverter causes a “Sequence contains more than one matching element” compile error” (PR)
  • 45678 – “Improperly adding two cells to a DataTemplate results in cryptic XamlC error” (PR)
  • 45874 – “Effect not attaching to ScrollView” (PR)
  • 45891 – “XamlParseException Cannot use OnIdiom with an inherited type.” (PR)
  • 45924 – “On UWP, SearchBar getting focus results in page scrolling unnecessarily” (PR)
  • 46458 – “Grid.IsEnabled property is not working” (PR)
  • 46601 – “MessagingCenter is static” (PR)
  • 46972 – “[Win] ListViews not respecting binding when a GRID is used in the data template”
  • 47701 – “Label inside ViewCell from ListView will clear if updated after await Task.Delay(anyNumber)” (PR)
  • 47923 – “Vectors don’t work in Images, and work badly in Buttons” (PR)
  • 48378 – “For builds on Mac, XamlC or Cecil incorrectly updates .mdb files for iOS apps, maybe only when the Xamarin.Build.Download package is also used” (PR)
  • 49384 – “NavigationPage.BarTextColorProperty not working with FormsApplicationActivity in API 21” (PR)
  • 50540 – “PullToRefresh causes crash when context action option is open” (PR)
  • 50584 – “[UWP] Setting ActivityIndicator.IsRunning=“false” shows the ActivityIndicator” (PR)
  • 50706 – “A picker in a grid in a viewcell in a tableview does not display the selected item (Windows only)”
  • 51236 – “[WinRT] Setting a MasterDetailPage’s IsPresented to false will not immediately update the layout to hide the Master on desktop” (PR)
  • 51652 – “Toggling the Header/Footer on a ListView Throws an NRE” (PR)
  • 51778 – “XamlC needs Portable .pdb support” (PR)
  • 51941 – “Add Highlighted/IsHighlighted property to Button of XF” (PR)
  • 52893 – “FileImageSource is improperly used” (PR)
  • 52266 – "Picker.Focus() does not work on Windows 8.1 and UWP (Windows Desktop) Breaking Behavior Change; see PR" (PR)
  • 52318 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 52466 – “[UWP Desktop Mode] MasterBehavior Default value doesn’t work for MasterDetailPage” (PR)
  • 52507 – “UI Rendering routine is too slow, here is a fix to make it instant.” (PR)
  • 52962 – “iOS ListView PullToRefresh not showing activity indicator” (PR)
  • 53113 – “Xamarin.Forms.Map crash on UWP” (PR)
  • 53215 – “Master Details Hamburger Menu Icon not displayed on UWP since V2.3.2.127” (PR)
  • 53224 – “CanExecute not used in ViewCells in UWP” (PR)
  • 53275 – “IProvideValueTarget TargetProperty always null” (PR)
  • 53417 – “Clearing Effects collection results in NullReferenceException” (PR)
  • 53427 – “UWP EntryCell Label Not Correct Color” (PR)
  • 53503 – “Inconsitent behaviour of xaml x:TypeArguments when using nested generic arguments” (PR)
  • 53515 – “F#: Loading images from files causes a null reference exception” (PR)
  • 53803 – “Issue where using FormsApplicationActivity crashes on latest nightlies after PR631.” (PR)
  • 54146 – “List view memory leak when using Recycle Element Caching Strategy” (PR)
  • 54153 – “Displaying UIImagePickerController fails to show camera feed” (PR)

Internal

  • [Internal] Normalize Obsolete attributes (PR)
  • [Internal] VSTS support (PR)
  • [Internal] Implicit impl of controller ifaces (PR)
  • [Internal] Add internal XF.Registrar.RegisterAll b/c previewer needs it (PR)
  • [Internal] Remove InternalsVisibleTo from Core to XF.Platforms.**** (PR)
  • [Internal] Add EditorBrowsableAttribute to public classes/interfaces in XF.Internals (PR)
  • [Internal] Robust doc change detection (PR)
  • [Internal] IEditorController (PR)
  • [Internal] [Win] Make WinRT/UWP platform classes more maintainable (PR)
  • [Internal] Checkout docs using unix line endings (PR)
  • [Internal] Force git to checkout docs using unix line endings (PR)
  • [Internal] Update ListProxyTest.WeakToWeak so it works in Release mode (PR)
  • [UITests] Add Xamarin.Forms.Core.UITests.Shared (PR)

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Pre-release: Xamarin.Forms 2.3.5.255-pre5

Xamarin.Forms 2.3.5.255-pre5 is now on NuGet. To install the pre-release, check the pre-release option in your NuGet package manager and install this version.

If you have a bug to report, drop us a detailed report here so we can troubleshoot.

Important notes

  • Xamarin.Forms is now compatible with .NET Standard projects! Not all build features may work.
  • Behavior change: Device.RuntimePlatform now returns WinRT on WinRT and UWP on UWP.
  • Behavior change: Using the new AutomationProperties may impact UI Test execution on Android. AutomationId, Name, and HelpText will all set the native ContentDescription property, with Name and/or HelpText taking precedence over AutomationId (Name and HelpText will be concatenated). This means that any tests looking for AutomationId will now fail if Name and/or HelpText are also set on that element. To work around this issue, please alter your UI Tests to look for the value of Name/HelpText in this scenario.
  • Behavior change: Calling Focus on a Picker on WinRT/UWP will now open the drop down.
  • Deprecation: Android IVisualElementRenderer.ViewGroup is now obsolete. Please use View instead.

Known Issues

  • 56795 – “DataTriggers do not work on UWP in RELEASE mode”

2.3.5.255-pre5

  • [Android] Dispose check before setting properties on Button (PR)
  • 36031 – “Button border not drawn on Android without a BorderRadius” (PR)
  • 57717 – “Setting background color on Button in Android FormsApplicationActivity causes NRE” (PR)
  • 57749 – “[UWP] After enabling a disabled button it is not clickable” (PR)
  • [Android] Dispose check on FastButtonRenderer to prevent crash (PR)
  • [Android] Set the Id field for Android Views created by Forms (PR)
  • 55588 – “Cannot open more than one ContextAction in different ListViews on IOS” (PR)
  • 56444 – “A small ”dot“ shows up as value in Android labels when the value is null/empty.” (PR)
  • 56895 – “VS2017 stable – previewer exception crash- no method found Button_click on type” (PR)
  • 56896 – “ListViews for lists with many elements regressed in performance on iOS” (PR)
  • 57108 – “Fix possible crash on API 21+ at launch when using Holo theme and FormsApplicationActivity” (PR)

2.3.5.239-pre3

Nuget package here.

  • [All] Rename Accessibility -> AutomationProperties (PR)
  • [Core] fix BP declaring Types for A11y (PR)
  • [Android] Add disposed check on FastRenderers.FrameRenderer (PR)
  • [Android] Add disposed check on FastRenderers.LabelRenderer (PR)
  • [Android] Add disposed check on FastRenderers.VisualElementRenderer (PR)
  • 45602 – “NullPointerException when applying style” (PR)
  • 54717 – “System.NullReferenceException Xamarin.Forms.Platform.Android.PlatformConfigurationExtensions.OnThisPlatform[T] (T element)” (PR)
  • 55542 – “View in Master Content Page stops loading ListView in Detail” (PR)
  • 55559 – “Exception when set the backgroundcolor of the frame on a property change event” (PR)
  • 55636 – “OnPlatform doesn’t work on UWP when compiling with .NET Native” (PR)
  • 55745 – “[iOS] NRE in ListView with HasUnevenRows=true after changing content and rebinding” (PR)
  • 55912 – “Tap event not always propagated to containing Grid/StackLayout” (PR)
  • 56079 – “Accessibility Support doesn’t work in XAML” (PR)

2.3.5.235-pre2

Nuget package here.

  • [Evolution] – “[Xaml] OnPlatform.Default value” (PR)
  • [Android] Make OnElementPropertyChanged virtual on fast renderers (PR)
  • [Android] Verify FragmentContainer created when queueing fragment transaction (Android) (PR)
  • [iOS] Prevent NRE in ListView OnItemSelected (PR)
  • 51173 – “ImageRenderer, async void SetImage – Cannot catch exceptions” (PR)
  • 55027 – “Xaml compilation can’t handle folders in namespaces” (PR)
  • 55096 – “Binding with nested class does not working on XAML.” (PR)
  • 55230 – “setStateListAnimator TargetInvocationException Crash in 2.3.5.233-pre1” (PR)
  • 55347 – “Exception when using static resource Thickness in 2.3.5-pre1 with XamlC” (PR)
  • [Internal] README: add macOS to list of supported platforms (PR)
  • [Internal] Add netstandard group to nuspec (PR)

2.3.5.233-pre1

Nuget package here.

Enhancements & Other Changes

  • [Evolution] – MacOS (PR)
  • [Evolution] – Basic Accessibility Support (PR)
  • [Evolution] – “[Enhancement] Map renderer extensibility” (PR)
  • [All] Add pressed and released events to Button (PR)
  • [All] Move XF.ConcurrentDictionary to WP8 project (PR)
  • [All] Reduce overhead of pushing existing navigation stack (PR)
  • [Android] Added Section indexes when FastScrolled is enabled (PR)
  • [Android] Fast Renderers (PR)
  • [Android] Fix NRE when RecycleElement is on and list is scrolled quickly on Android (PR)
  • [Android] Fixed issue where Android Hints were causing a “.” to be placed on al… (PR)
  • [Android] Small performance fixes to ListViewRenderer, PlatformSpecific IsFastScrollEnabled (PR)
  • [Android] UI tests for InputTransparent and fixes for Android/Windows (PR)
  • [Core] Add default parameter value of zero to INavigationPageController.Peek() (PR)
  • [Core] Add TV to TargetIdiom (PR)
  • [Core] Added RootPage to NavigationPage (PR)
  • [Core] Align iOS, Android, Windows handling of tap gesture event bubbling (PR)
  • [Core] Fix internal children clear logic (PR)
  • [Core] fix NIE in Span (PR)
  • [Core] ITextElement and TextElement (PR)
  • [Core] move the Font proxying into FontElement (PR)
  • [Core] Share BP across IFontElement implementors (PR)
  • [Core] Split Windows RuntimePlatform into UWP and WinRT (PR)
  • [Core] support more color format in ColorTypeConverter (PR)
  • [Core] Update RelativeLayout to make it respond to constraint changes (PR)
  • [Internal] Fix accessibility gallery (PR)
  • [iOS, Android] Throw InvalidOperationException when ViewCell View is null (PR)
  • [iOS] Dispose Entry and Editor properly and automate GC checks (PR)
  • [iOS] Dispose pickers properly and automate GC checks (PR)
  • [iOS] Expose row animation properties in ListViewRenderer (PR)
  • [iOS] Fix for nullreferenceexception in TabbedRenderer on iOS when it has are no children (yet) (PR)
  • [iOS] Fix obsolete constructor in ContextActionCell (PR)
  • [iOS] Inherit Transitioning Delegate from Child (ModalWrapper) (PR)
  • [iOS] TabbedRenderer / load icons from custom sources (from embedded svg for example) (PR)
  • [macOS] Adds Scrollbars to ListViews and ScrollViews (PR)
  • [macOS] Fixed Tab NSImage crash in TabbedPageRenderer (PR)
  • [Xaml] decorate markup and value providers to speed up inflating (PR)
  • [Xaml] empty service provider (PR)
  • [Xaml] no longer require a ServiceProvider for Trigger and PropertyCo… (PR)
  • [Xaml] Null compiled markup (PR)
  • [Xaml] Resource loading (PR)
  • [XamlC] compile ListStringTypeConverter (PR)
  • [XamlC] compiled TypeExtension (PR)
  • [XamlC] complete the Setter/Trigger fix (PR)
  • [XamlC] debug (PR)
  • [XamlC] Fix debugging tests (PR)
  • [XamlC] supports ‘using:’ xmlns declarations (PR)

Bug Fixes

  • 27194 – “Possible Memory Leak with ContextAction” (PR)
  • 27731 – “[Android] Action Bar can not be controlled reliably on MasterDetailPage” (PR)
  • 29247 – “iOS Device.OpenUri breaks with encoded params” (PR)
  • 30166 – “Problem with NavigationBar.BarBackgroundColor on Lollipop” (PR)
  • 31415 – “ListView Does Not Update After GC When Collection Uses Weak References” (PR)
  • 32206 – “ContextActions cause memory leak: Page is never destroyed” (PR)
  • 32847 – “Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker” (PR)
  • 32865 – “On MasterDetailPage trying to change Icon of Master page doesn’t work if another view is pushed and Image is renderer in blue” (PR)
  • 32956 – “Setting ListView.SelectedItem to null does not remove list item highlight when list item is tapped multiple times quickly” (PR)
  • 39407 – “Picker wrong SelectedIndex value” (PR)
  • 40139 – “Changing the Windows 10 System Theme Color causes ListView text to disappear.” (PR)
  • 40251 – “Cannot style Buttons natively using UIButton.Appearance” (PR)
  • 40906 – “CDATA ignored in XAML layout” (PR)
  • 41600 – “ListView.ScrollTo does not behave as per documentation on UWP” (PR)
  • 41619 – “After updating to lastest Xamarin for VS 2015, the UWP Slider Value binding no longer works” (PR)
  • 41778 – “Slider Inside ScrollView Will Open MasterDetailPage.Master” (PR)
  • 41900 – “UWP Map on navigated Page can’t change size.” (PR)
  • 41919 – “SearchBar crash because set FontFamily in UWP global FontFamily style” (PR)
  • 42000 – “Unable to use comma (”,") as decimal point" (PR)
  • 42084 – “Entry Bound to a Double Does Not Accept ‘,’ As Decimal Separator” (PR)
  • 42151 – “UWP Map VisibleRegion is calculated incorrectly” (PR)
  • 42678 – “[Android] System.ObjectDisposedException when tapping a toolbar button after switching tabs.” (PR)
  • 43007 – “Controls nested in StackLayout need to inherit IsEnabled property” (PR)
  • 43519 – “[UWP] MasterDetail page ArguementException when nested in a TabbedPage and returning from modal page” (PR)
  • 43527 – “Page title does not change when Title property is set in code or via binding to a ViewModel” (PR)
  • 43694 – “StaticResource does not work for x:String and OnPlatform” (PR)
  • 43783 – “Most Device Styles do not render correctly in Windows Phone 8.1 (RT) applications” (PR)
  • 43867 – “Numeric keyboard shows text / default keyboard when back button is hit” (PR)
  • 43941 – “Memory leak with ListView’s RecycleElement on iOS” (PR)
  • 44047 – “Memory leak when using SetBackButtonTitle on iOS” (PR)
  • 44096 – “Grid, StackLayout, and ContentView do not pass IsEnabled changes to their children on Android” (PR)
  • 44176 – “InputTransparent fails if BackgroundColor not explicitly set on Android” (PR)
  • 44213 – “Can’t bind to specific properties through OnPlatform” (PR)
  • 44216 – “No property, bindable property, or event found Wen using xamlc” (PR)
  • 44525 – “Xamarin.Forms Listview Row Height Does Not Adapt In iOS” (PR)
  • 44940 – “ScrollToAsync memory leak on UWP” (PR)
  • 44955 – “UWP: Setting Entry BackgroundColor via Behavior results in sticky unfocused background color” (PR)
  • 44980 – “ActivityIndicator disappears when scrolling” (PR)
  • 45027 – “App crashes when double tapping on ToolbarItem or MenuItem very quickly” (PR)
  • 45067 – “No way of cleanly dismissing soft keyboard in UWP” (PR)
  • 45284 – “Extra tab icons display in iOS when binding Title on TabbedPage” (PR)
  • 45179 – “Views in DataTemplate’s are being created without the template ever loading.” (PR)
  • 45277 – “On UWP, Entry with IsPassword = true does not allow selection of characters” (PR)
  • 45299 – “Using a custom TypeConverter causes a “Sequence contains more than one matching element” compile error” (PR)
  • 45678 – “Improperly adding two cells to a DataTemplate results in cryptic XamlC error” (PR)
  • 45874 – “Effect not attaching to ScrollView” (PR)
  • 45891 – “XamlParseException Cannot use OnIdiom with an inherited type.” (PR)
  • 45924 – “On UWP, SearchBar getting focus results in page scrolling unnecessarily” (PR)
  • 46458 – “Grid.IsEnabled property is not working” (PR)
  • 46601 – “MessagingCenter is static” (PR)
  • 46972 – “[Win] ListViews not respecting binding when a GRID is used in the data template”
  • 47701 – “Label inside ViewCell from ListView will clear if updated after await Task.Delay(anyNumber)” (PR)
  • 47923 – “Vectors don’t work in Images, and work badly in Buttons” (PR)
  • 48378 – “For builds on Mac, XamlC or Cecil incorrectly updates .mdb files for iOS apps, maybe only when the Xamarin.Build.Download package is also used” (PR)
  • 49384 – “NavigationPage.BarTextColorProperty not working with FormsApplicationActivity in API 21” (PR)
  • 50540 – “PullToRefresh causes crash when context action option is open” (PR)
  • 50584 – “[UWP] Setting ActivityIndicator.IsRunning=“false” shows the ActivityIndicator” (PR)
  • 50706 – “A picker in a grid in a viewcell in a tableview does not display the selected item (Windows only)”
  • 51236 – “[WinRT] Setting a MasterDetailPage’s IsPresented to false will not immediately update the layout to hide the Master on desktop” (PR)
  • 51652 – “Toggling the Header/Footer on a ListView Throws an NRE” (PR)
  • 51778 – “XamlC needs Portable .pdb support” (PR)
  • 51941 – “Add Highlighted/IsHighlighted property to Button of XF” (PR)
  • 52893 – “FileImageSource is improperly used” (PR)
  • 52266 – "Picker.Focus() does not work on Windows 8.1 and UWP (Windows Desktop) Breaking Behavior Change; see PR" (PR)
  • 52318 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 52466 – “[UWP Desktop Mode] MasterBehavior Default value doesn’t work for MasterDetailPage” (PR)
  • 52507 – “UI Rendering routine is too slow, here is a fix to make it instant.” (PR)
  • 52962 – “iOS ListView PullToRefresh not showing activity indicator” (PR)
  • 53113 – “Xamarin.Forms.Map crash on UWP” (PR)
  • 53215 – “Master Details Hamburger Menu Icon not displayed on UWP since V2.3.2.127” (PR)
  • 53224 – “CanExecute not used in ViewCells in UWP” (PR)
  • 53275 – “IProvideValueTarget TargetProperty always null” (PR)
  • 53417 – “Clearing Effects collection results in NullReferenceException” (PR)
  • 53427 – “UWP EntryCell Label Not Correct Color” (PR)
  • 53503 – “Inconsitent behaviour of xaml x:TypeArguments when using nested generic arguments” (PR)
  • 53515 – “F#: Loading images from files causes a null reference exception” (PR)
  • 53803 – “Issue where using FormsApplicationActivity crashes on latest nightlies after PR631.” (PR)
  • 54146 – “List view memory leak when using Recycle Element Caching Strategy” (PR)
  • 54153 – “Displaying UIImagePickerController fails to show camera feed” (PR)

Internal

  • [Internal] Normalize Obsolete attributes (PR)
  • [Internal] VSTS support (PR)
  • [Internal] Implicit impl of controller ifaces (PR)
  • [Internal] Add internal XF.Registrar.RegisterAll b/c previewer needs it (PR)
  • [Internal] Remove InternalsVisibleTo from Core to XF.Platforms.**** (PR)
  • [Internal] Add EditorBrowsableAttribute to public classes/interfaces in XF.Internals (PR)
  • [Internal] Robust doc change detection (PR)
  • [Internal] IEditorController (PR)
  • [Internal] [Win] Make WinRT/UWP platform classes more maintainable (PR)
  • [Internal] Checkout docs using unix line endings (PR)
  • [Internal] Force git to checkout docs using unix line endings (PR)
  • [Internal] Update ListProxyTest.WeakToWeak so it works in Release mode (PR)
  • [UITests] Add Xamarin.Forms.Core.UITests.Shared (PR)

Discuss this post on the Xamarin Forums

Common issues from the Xamarin 15.2 release being tracked by the Xamarin team

In case it might be useful for reference, here is an in-progress list of some commonly seen issues being tracked by the Xamarin team for the Xamarin 15.2 release. The list is sorted approximately by the number of users subscribed to each bug report, and in some cases also by additional hand-tallying. The list focuses on issues where the pattern of reports suggests a change in behavior compared to the Xamarin 15.1 release. This list is not exhaustive: It does not include every issue user-submitted issue reported since the time of the Xamarin 15.2 release.

  • Bug 56275 and developercommunity 54945 [Xamarin.VisualStudio] Significant increase in the chances of hitting “Unable to copy file “obj\Debug\App1.dll” to “bin\Debug\App1.dll”. The process cannot access the file ‘bin\Debug\App1.dll’ because it is being used by another process.” and “Exceeded retry count of 10. Failed”. Under investigation.
    • A few possible temporary workarounds are discussed on the bug report.
    • One comment on the report also indicates that installing and using the Visual Studio 2017 Preview version 15.3 might resolve the issue.
  • Bug 56246 [Mono, Xamarin.Android, Xamarin.iOS, Xamarin.Mac] Tracking bug for upstream Roslyn issue 17934: “error MSB6006: “csc.exe” exited with code 1″ due to KeyNotFoundException when compiling projects that include async partial methods. Integration of the upstream Roslyn fix is in-progress.
    • Partial temporary workaround: Switch back to mcs and xbuild (see additional details below).
  • Bug 56213 [Xamarin.VisualStudio] “Can not resolve reference: C:/Windows/Microsoft.NET/Framework/v4.0.30319/de/mscorlib.resources.dll” when building or breakpoints fail to hit on iOS devices when debugging. Now RESOLVED in the source code, and will be included in an upcoming release.
  • Bug 55087 [Xamarin.Android] “System.NotSupportedException: Stack walks are not supported on this platform – System.Reflection.MethodBase.GetCurrentMethod” when attempting to debug on x86_64 Android emulators. Now RESOLVED in the source code, and will be included in an upcoming release.
    • Partial temporary workaround: Use an x86 Android emulator rather than an x86_64 Android emulator.
  • Bug 56296 [Xamarin.Forms] “MTOUCH: error MT2001: Could not link assemblies.” when attempting to link Xamarin.Forms projects that use XamlC on iOS because XamlC does not update the new default portable .pdb debug symbol files. Now RESOLVED in the source code, and will be included in an upcoming release of Xamarin.Forms.
    • Possible temporary workaround: Disable XamlC.
    • Alternate possible temporary workaround: Switch back to mcs and xbuild (see additional details below).
  • Bug 56240 [Xamarin.Android] Performance degradation when using System.Linq.Expressions in Xamarin.Android 7.3. A candidate change has been added and will be included in an upcoming release of Xamarin.Android.
  • Bug 56238 and developercommunity 49033 [Xamarin.Android] App exits on launch or fails to hit breakpoints when debugging due to change in default build behavior when the Optimize MSBuild property is not explicitly set. Now RESOLVED in the source code, and will be included in an upcoming release.
    • Workaround: Explicitly set the Optimize property to False in the .csproj file. See the answer on the developercommunity item for a few additional details.
  • Compatibility change: [Xamarin Studio] Breakpoints no longer work for certain Xamarin project types and scenarios in Xamarin Studio 6.3 due incomplete support for the new default portable .pdb format generated by Mono 5.0.
    • Recommended solution: Install and use Visual Studio for Mac now that it is generally available and the recommended environment for Xamarin development on Mac.
    • Alternate possible temporary workaround: Switch back to mcs and xbuild (see additional details below).
  • Bug 56192 [Xamarin.VisualStudio] MultiDex is disabled after saving changes to Xamarin.Android project due to incorrect MSBuild property name <AndroidEnableMultipleDex>. Now RESOLVED in the source code, and will be included in an upcoming release.
    • Workaround: In the .csproj file, replace all occurrences of AndroidEnableMultipleDex with the correct property name AndroidEnableMultiDex using a text editor.
  • Bug 56220 [Xamarin.iOS, Xamarin.VisualStudio] “The item “C:….nuget\packages\Autofac\4.5.0\lib\netstandard1.1\Autofac.dll” in item list “ReferenceCopyLocalPaths” does not define a value for metadata “ResolvedFrom””. Under investigation. A few possible temporary workarounds are discussed on the bug report.
    • A possible temporary workaround is mentioned on the bug report.

Temporarily switching back to mcs and xbuild

The Xamarin 15.2 release includes Mono 5.0, which enables the Roslyn csc C# compiler by default and deprecates the use of xbuild in favor of msbuild. For the Xamarin toolchain, this adds C# 7 support and changes the default debugging symbol format from .mdb files to portable .pdb files. And Visual Studio for Mac uses msbuild by default when building projects.

The change from mcs to csc and xbuild to msbuild is related to several of the issues listed above. One potential workaround in those cases is to switch back to the earlier combination of mcs and xbuild without downgrading Mono or the Xamarin toolchain. As a caution, this is not a tested scenario, so although this approach has been reported to work well so far, it does still have a chance of hitting other secondary errors.

  1. Add the following PropertyGroup element to the bottom of the .csproj file for your app project just before the closing </Project> tag:
    <PropertyGroup Condition=" '$(OS)' == 'Unix' ">
        <CscToolExe>mcs.exe</CscToolExe>
    </PropertyGroup>
    
  2. Disable Visual Studio > Preferences > Build > Build with MSBuild instead of xbuild.(This setting is also available in Xamarin Studio 6.3. It is disabled by default in Xamarin Studio, but some users might have enabled it by hand in the past.)
  3. Close and reopen the solution to ensure the new setting is used.
  4. Clean and rebuild the project.

Pre-release: Xamarin.Forms 2.3.5.239-pre3

We’ve pushed Xamarin.Forms 2.3.5.239-pre3 to NuGet. To install the pre-release, check the pre-release option in your NuGet package manager and install this version.

If you have a bug to report, drop us a detailed report here so we can troubleshoot.

Important notes

  • Xamarin.Forms is now compatible with .NET Standard projects! Not all build features may work.
  • Behavior change: Device.RuntimePlatform now returns WinRT on WinRT and UWP on UWP.
  • Behavior change: Using the new AutomationProperties may impact UI Test execution on Android. AutomationId, Name, and HelpText will all set the native ContentDescription property, with Name and/or HelpText taking precedence over AutomationId (Name and HelpText will be concatenated). This means that any tests looking for AutomationId will now fail if Name and/or HelpText are also set on that element. To work around this issue, please alter your UI Tests to look for the value of Name/HelpText in this scenario.
  • Behavior change: Calling Focus on a Picker on WinRT/UWP will now open the drop down.
  • Deprecation: Android IVisualElementRenderer.ViewGroup is now obsolete. Please use View instead.

2.3.5.239-pre3

  • [All] Rename Accessibility -> AutomationProperties (PR)
  • [Core] fix BP declaring Types for A11y (PR)
  • [Android] Add disposed check on FastRenderers.FrameRenderer (PR)
  • [Android] Add disposed check on FastRenderers.LabelRenderer (PR)
  • [Android] Add disposed check on FastRenderers.VisualElementRenderer (PR)
  • 45602 – “NullPointerException when applying style” (PR)
  • 54717 – “System.NullReferenceException Xamarin.Forms.Platform.Android.PlatformConfigurationExtensions.OnThisPlatform[T] (T element)” (PR)
  • 55542 – “View in Master Content Page stops loading ListView in Detail” (PR)
  • 55559 – “Exception when set the backgroundcolor of the frame on a property change event” (PR)
  • 55588 – “Cannot open more than one ContextAction in different ListViews on IOS” (PR)
  • 55636 – “OnPlatform doesn’t work on UWP when compiling with .NET Native” (PR)
  • 55745 – “[iOS] NRE in ListView with HasUnevenRows=true after changing content and rebinding” (PR)
  • 55912 – “Tap event not always propagated to containing Grid/StackLayout” (PR)
  • 56079 – “Accessibility Support doesn’t work in XAML” (PR)

2.3.5.235-pre2

Nuget package here.

  • [Evolution] – “[Xaml] OnPlatform.Default value” (PR)
  • [Android] Make OnElementPropertyChanged virtual on fast renderers (PR)
  • [Android] Verify FragmentContainer created when queueing fragment transaction (Android) (PR)
  • [iOS] Prevent NRE in ListView OnItemSelected (PR)
  • 51173 – “ImageRenderer, async void SetImage – Cannot catch exceptions” (PR)
  • 55027 – “Xaml compilation can’t handle folders in namespaces” (PR)
  • 55096 – “Binding with nested class does not working on XAML.” (PR)
  • 55230 – “setStateListAnimator TargetInvocationException Crash in 2.3.5.233-pre1” (PR)
  • 55347 – “Exception when using static resource Thickness in 2.3.5-pre1 with XamlC” (PR)
  • [Internal] README: add macOS to list of supported platforms (PR)
  • [Internal] Add netstandard group to nuspec (PR)

2.3.5.233-pre1

Nuget package here.

Enhancements & Other Changes

  • [Evolution] – MacOS (PR)
  • [Evolution] – Basic Accessibility Support (PR)
  • [Evolution] – “[Enhancement] Map renderer extensibility” (PR)
  • [All] Add pressed and released events to Button (PR)
  • [All] Move XF.ConcurrentDictionary to WP8 project (PR)
  • [All] Reduce overhead of pushing existing navigation stack (PR)
  • [Android] Added Section indexes when FastScrolled is enabled (PR)
  • [Android] Fast Renderers (PR)
  • [Android] Fix NRE when RecycleElement is on and list is scrolled quickly on Android (PR)
  • [Android] Fixed issue where Android Hints were causing a “.” to be placed on al… (PR)
  • [Android] Small performance fixes to ListViewRenderer, PlatformSpecific IsFastScrollEnabled (PR)
  • [Android] UI tests for InputTransparent and fixes for Android/Windows (PR)
  • [Core] Add default parameter value of zero to INavigationPageController.Peek() (PR)
  • [Core] Add TV to TargetIdiom (PR)
  • [Core] Added RootPage to NavigationPage (PR)
  • [Core] Align iOS, Android, Windows handling of tap gesture event bubbling (PR)
  • [Core] Fix internal children clear logic (PR)
  • [Core] fix NIE in Span (PR)
  • [Core] ITextElement and TextElement (PR)
  • [Core] move the Font proxying into FontElement (PR)
  • [Core] Share BP across IFontElement implementors (PR)
  • [Core] Split Windows RuntimePlatform into UWP and WinRT (PR)
  • [Core] support more color format in ColorTypeConverter (PR)
  • [Core] Update RelativeLayout to make it respond to constraint changes (PR)
  • [Internal] Fix accessibility gallery (PR)
  • [iOS, Android] Throw InvalidOperationException when ViewCell View is null (PR)
  • [iOS] Dispose Entry and Editor properly and automate GC checks (PR)
  • [iOS] Dispose pickers properly and automate GC checks (PR)
  • [iOS] Expose row animation properties in ListViewRenderer (PR)
  • [iOS] Fix for nullreferenceexception in TabbedRenderer on iOS when it has are no children (yet) (PR)
  • [iOS] Fix obsolete constructor in ContextActionCell (PR)
  • [iOS] Inherit Transitioning Delegate from Child (ModalWrapper) (PR)
  • [iOS] TabbedRenderer / load icons from custom sources (from embedded svg for example) (PR)
  • [macOS] Adds Scrollbars to ListViews and ScrollViews (PR)
  • [macOS] Fixed Tab NSImage crash in TabbedPageRenderer (PR)
  • [Xaml] decorate markup and value providers to speed up inflating (PR)
  • [Xaml] empty service provider (PR)
  • [Xaml] no longer require a ServiceProvider for Trigger and PropertyCo… (PR)
  • [Xaml] Null compiled markup (PR)
  • [Xaml] Resource loading (PR)
  • [XamlC] compile ListStringTypeConverter (PR)
  • [XamlC] compiled TypeExtension (PR)
  • [XamlC] complete the Setter/Trigger fix (PR)
  • [XamlC] debug (PR)
  • [XamlC] Fix debugging tests (PR)
  • [XamlC] supports ‘using:’ xmlns declarations (PR)

Bug Fixes

  • 27194 – “Possible Memory Leak with ContextAction” (PR)
  • 27731 – “[Android] Action Bar can not be controlled reliably on MasterDetailPage” (PR)
  • 29247 – “iOS Device.OpenUri breaks with encoded params” (PR)
  • 30166 – “Problem with NavigationBar.BarBackgroundColor on Lollipop” (PR)
  • 31415 – “ListView Does Not Update After GC When Collection Uses Weak References” (PR)
  • 32206 – “ContextActions cause memory leak: Page is never destroyed” (PR)
  • 32847 – “Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker” (PR)
  • 32865 – “On MasterDetailPage trying to change Icon of Master page doesn’t work if another view is pushed and Image is renderer in blue” (PR)
  • 32956 – “Setting ListView.SelectedItem to null does not remove list item highlight when list item is tapped multiple times quickly” (PR)
  • 39407 – “Picker wrong SelectedIndex value” (PR)
  • 40139 – “Changing the Windows 10 System Theme Color causes ListView text to disappear.” (PR)
  • 40251 – “Cannot style Buttons natively using UIButton.Appearance” (PR)
  • 40906 – “CDATA ignored in XAML layout” (PR)
  • 41600 – “ListView.ScrollTo does not behave as per documentation on UWP” (PR)
  • 41619 – “After updating to lastest Xamarin for VS 2015, the UWP Slider Value binding no longer works” (PR)
  • 41778 – “Slider Inside ScrollView Will Open MasterDetailPage.Master” (PR)
  • 41900 – “UWP Map on navigated Page can’t change size.” (PR)
  • 41919 – “SearchBar crash because set FontFamily in UWP global FontFamily style” (PR)
  • 42000 – “Unable to use comma (”,") as decimal point" (PR)
  • 42084 – “Entry Bound to a Double Does Not Accept ‘,’ As Decimal Separator” (PR)
  • 42151 – “UWP Map VisibleRegion is calculated incorrectly” (PR)
  • 42678 – “[Android] System.ObjectDisposedException when tapping a toolbar button after switching tabs.” (PR)
  • 43007 – “Controls nested in StackLayout need to inherit IsEnabled property” (PR)
  • 43519 – “[UWP] MasterDetail page ArguementException when nested in a TabbedPage and returning from modal page” (PR)
  • 43527 – “Page title does not change when Title property is set in code or via binding to a ViewModel” (PR)
  • 43694 – “StaticResource does not work for x:String and OnPlatform” (PR)
  • 43783 – “Most Device Styles do not render correctly in Windows Phone 8.1 (RT) applications” (PR)
  • 43867 – “Numeric keyboard shows text / default keyboard when back button is hit” (PR)
  • 43941 – “Memory leak with ListView’s RecycleElement on iOS” (PR)
  • 44047 – “Memory leak when using SetBackButtonTitle on iOS” (PR)
  • 44096 – “Grid, StackLayout, and ContentView do not pass IsEnabled changes to their children on Android” (PR)
  • 44176 – “InputTransparent fails if BackgroundColor not explicitly set on Android” (PR)
  • 44213 – “Can’t bind to specific properties through OnPlatform” (PR)
  • 44216 – “No property, bindable property, or event found Wen using xamlc” (PR)
  • 44525 – “Xamarin.Forms Listview Row Height Does Not Adapt In iOS” (PR)
  • 44940 – “ScrollToAsync memory leak on UWP” (PR)
  • 44955 – “UWP: Setting Entry BackgroundColor via Behavior results in sticky unfocused background color” (PR)
  • 44980 – “ActivityIndicator disappears when scrolling” (PR)
  • 45027 – “App crashes when double tapping on ToolbarItem or MenuItem very quickly” (PR)
  • 45067 – “No way of cleanly dismissing soft keyboard in UWP” (PR)
  • 45284 – “Extra tab icons display in iOS when binding Title on TabbedPage” (PR)
  • 45179 – “Views in DataTemplate’s are being created without the template ever loading.” (PR)
  • 45277 – “On UWP, Entry with IsPassword = true does not allow selection of characters” (PR)
  • 45299 – “Using a custom TypeConverter causes a “Sequence contains more than one matching element” compile error” (PR)
  • 45678 – “Improperly adding two cells to a DataTemplate results in cryptic XamlC error” (PR)
  • 45874 – “Effect not attaching to ScrollView” (PR)
  • 45891 – “XamlParseException Cannot use OnIdiom with an inherited type.” (PR)
  • 45924 – “On UWP, SearchBar getting focus results in page scrolling unnecessarily” (PR)
  • 46458 – “Grid.IsEnabled property is not working” (PR)
  • 46601 – “MessagingCenter is static” (PR)
  • 46972 – “[Win] ListViews not respecting binding when a GRID is used in the data template”
  • 47701 – “Label inside ViewCell from ListView will clear if updated after await Task.Delay(anyNumber)” (PR)
  • 47923 – “Vectors don’t work in Images, and work badly in Buttons” (PR)
  • 48378 – “For builds on Mac, XamlC or Cecil incorrectly updates .mdb files for iOS apps, maybe only when the Xamarin.Build.Download package is also used” (PR)
  • 49384 – “NavigationPage.BarTextColorProperty not working with FormsApplicationActivity in API 21” (PR)
  • 50540 – “PullToRefresh causes crash when context action option is open” (PR)
  • 50584 – “[UWP] Setting ActivityIndicator.IsRunning=“false” shows the ActivityIndicator” (PR)
  • 50706 – “A picker in a grid in a viewcell in a tableview does not display the selected item (Windows only)”
  • 51236 – “[WinRT] Setting a MasterDetailPage’s IsPresented to false will not immediately update the layout to hide the Master on desktop” (PR)
  • 51652 – “Toggling the Header/Footer on a ListView Throws an NRE” (PR)
  • 51778 – “XamlC needs Portable .pdb support” (PR)
  • 51941 – “Add Highlighted/IsHighlighted property to Button of XF” (PR)
  • 52893 – “FileImageSource is improperly used” (PR)
  • 52266 – "Picker.Focus() does not work on Windows 8.1 and UWP (Windows Desktop) Breaking Behavior Change; see PR" (PR)
  • 52318 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 52507 – “UI Rendering routine is too slow, here is a fix to make it instant.” (PR)
  • 52962 – “iOS ListView PullToRefresh not showing activity indicator” (PR)
  • 53113 – “Xamarin.Forms.Map crash on UWP” (PR)
  • 53215 – “Master Details Hamburger Menu Icon not displayed on UWP since V2.3.2.127” (PR)
  • 53224 – “CanExecute not used in ViewCells in UWP” (PR)
  • 53275 – “IProvideValueTarget TargetProperty always null” (PR)
  • 53417 – “Clearing Effects collection results in NullReferenceException” (PR)
  • 53427 – “UWP EntryCell Label Not Correct Color” (PR)
  • 53503 – “Inconsitent behaviour of xaml x:TypeArguments when using nested generic arguments” (PR)
  • 53515 – “F#: Loading images from files causes a null reference exception” (PR)
  • 53803 – “Issue where using FormsApplicationActivity crashes on latest nightlies after PR631.” (PR)
  • 54146 – “List view memory leak when using Recycle Element Caching Strategy” (PR)
  • 54153 – “Displaying UIImagePickerController fails to show camera feed” (PR)

Internal

  • [Internal] Normalize Obsolete attributes (PR)
  • [Internal] VSTS support (PR)
  • [Internal] Implicit impl of controller ifaces (PR)
  • [Internal] Add internal XF.Registrar.RegisterAll b/c previewer needs it (PR)
  • [Internal] Remove InternalsVisibleTo from Core to XF.Platforms.**** (PR)
  • [Internal] Add EditorBrowsableAttribute to public classes/interfaces in XF.Internals (PR)
  • [Internal] Robust doc change detection (PR)
  • [Internal] IEditorController (PR)
  • [Internal] [Win] Make WinRT/UWP platform classes more maintainable (PR)
  • [Internal] Checkout docs using unix line endings (PR)
  • [Internal] Force git to checkout docs using unix line endings (PR)
  • [Internal] Update ListProxyTest.WeakToWeak so it works in Release mode (PR)
  • [UITests] Add Xamarin.Forms.Core.UITests.Shared (PR)

Discuss this post on the Xamarin Forums

Pre-release: Xamarin.Forms 2.3.5.235-pre2

We’ve pushed Xamarin.Forms 2.3.5.235-pre2 to NuGet. To install the pre-release, check the pre-release option in your NuGet package manager and install this version.

If you have a bug to report, drop us a detailed report here so we can troubleshoot.

Important notes

  • .NET Standard: Xamarin.Forms is now compatible with .NET Standard projects! Not all build features may work. We recommend a minimum target version of 1.1. Additional background on Xamarin and .NET Standard is covered on our blog here. Use msbuild when building from the command line.
  • Behavior change: Calling Focus on a Picker on WinRT/UWP will now open the drop down.
  • Deprecation: Android IVisualElementRenderer.ViewGroup is now obsolete. Please use View instead.

Known Issues

2.3.5.235-pre2

  • [Evolution] – “[Xaml] OnPlatform.Default value” (PR)
  • [Android] Make OnElementPropertyChanged virtual on fast renderers (PR)
  • [Android] Verify FragmentContainer created when queueing fragment transaction (Android) (PR)
  • [iOS] Prevent NRE in ListView OnItemSelected (PR)
  • 51173 – “ImageRenderer, async void SetImage – Cannot catch exceptions” (PR)
  • 55027 – “Xaml compilation can’t handle folders in namespaces” (PR)
  • 55096 – “Binding with nested class does not working on XAML.” (PR)
  • 55230 – “setStateListAnimator TargetInvocationException Crash in 2.3.5.233-pre1” (PR)
  • 55347 – “Exception when using static resource Thickness in 2.3.5-pre1 with XamlC” (PR)
  • [Internal] README: add macOS to list of supported platforms (PR)
  • [Internal] Add netstandard group to nuspec (PR)

2.3.5.233-pre1

Enhancements & Other Changes

  • [Evolution] – MacOS (PR)
  • [Evolution] – Basic Accessibility Support (PR)
  • [Evolution] – “[Enhancement] Map renderer extensibility” (PR)
  • [All] Add pressed and released events to Button (PR)
  • [All] Move XF.ConcurrentDictionary to WP8 project (PR)
  • [All] Reduce overhead of pushing existing navigation stack (PR)
  • [Android] Added Section indexes when FastScrolled is enabled (PR)
  • [Android] Fast Renderers (PR)
  • [Android] Fix NRE when RecycleElement is on and list is scrolled quickly on Android (PR)
  • [Android] Fixed issue where Android Hints were causing a “.” to be placed on al… (PR)
  • [Android] Small performance fixes to ListViewRenderer, PlatformSpecific IsFastScrollEnabled (PR)
  • [Android] UI tests for InputTransparent and fixes for Android/Windows (PR)
  • [Core] Add default parameter value of zero to INavigationPageController.Peek() (PR)
  • [Core] Add TV to TargetIdiom (PR)
  • [Core] Added RootPage to NavigationPage (PR)
  • [Core] Align iOS, Android, Windows handling of tap gesture event bubbling (PR)
  • [Core] Fix internal children clear logic (PR)
  • [Core] fix NIE in Span (PR)
  • [Core] ITextElement and TextElement (PR)
  • [Core] move the Font proxying into FontElement (PR)
  • [Core] Share BP across IFontElement implementors (PR)
  • [Core] Split Windows RuntimePlatform into UWP and WinRT (PR)
  • [Core] support more color format in ColorTypeConverter (PR)
  • [Core] Update RelativeLayout to make it respond to constraint changes (PR)
  • [Internal] Fix accessibility gallery (PR)
  • [iOS, Android] Throw InvalidOperationException when ViewCell View is null (PR)
  • [iOS] Dispose Entry and Editor properly and automate GC checks (PR)
  • [iOS] Dispose pickers properly and automate GC checks (PR)
  • [iOS] Expose row animation properties in ListViewRenderer (PR)
  • [iOS] Fix for nullreferenceexception in TabbedRenderer on iOS when it has are no children (yet) (PR)
  • [iOS] Fix obsolete constructor in ContextActionCell (PR)
  • [iOS] Inherit Transitioning Delegate from Child (ModalWrapper) (PR)
  • [iOS] TabbedRenderer / load icons from custom sources (from embedded svg for example) (PR)
  • [macOS] Adds Scrollbars to ListViews and ScrollViews (PR)
  • [macOS] Fixed Tab NSImage crash in TabbedPageRenderer (PR)
  • [Xaml] decorate markup and value providers to speed up inflating (PR)
  • [Xaml] empty service provider (PR)
  • [Xaml] no longer require a ServiceProvider for Trigger and PropertyCo… (PR)
  • [Xaml] Null compiled markup (PR)
  • [Xaml] Resource loading (PR)
  • [XamlC] compile ListStringTypeConverter (PR)
  • [XamlC] compiled TypeExtension (PR)
  • [XamlC] complete the Setter/Trigger fix (PR)
  • [XamlC] debug (PR)
  • [XamlC] Fix debugging tests (PR)
  • [XamlC] supports ‘using:’ xmlns declarations (PR)

Bug Fixes

  • 27194 – “Possible Memory Leak with ContextAction” (PR)
  • 27731 – “[Android] Action Bar can not be controlled reliably on MasterDetailPage” (PR)
  • 29247 – “iOS Device.OpenUri breaks with encoded params” (PR)
  • 30166 – “Problem with NavigationBar.BarBackgroundColor on Lollipop” (PR)
  • 31415 – “ListView Does Not Update After GC When Collection Uses Weak References” (PR)
  • 32206 – “ContextActions cause memory leak: Page is never destroyed” (PR)
  • 32847 – “Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker” (PR)
  • 32865 – “On MasterDetailPage trying to change Icon of Master page doesn’t work if another view is pushed and Image is renderer in blue” (PR)
  • 32956 – “Setting ListView.SelectedItem to null does not remove list item highlight when list item is tapped multiple times quickly” (PR)
  • 39407 – “Picker wrong SelectedIndex value” (PR)
  • 40139 – “Changing the Windows 10 System Theme Color causes ListView text to disappear.” (PR)
  • 40251 – “Cannot style Buttons natively using UIButton.Appearance” (PR)
  • 40906 – “CDATA ignored in XAML layout” (PR)
  • 41600 – “ListView.ScrollTo does not behave as per documentation on UWP” (PR)
  • 41619 – “After updating to lastest Xamarin for VS 2015, the UWP Slider Value binding no longer works” (PR)
  • 41778 – “Slider Inside ScrollView Will Open MasterDetailPage.Master” (PR)
  • 41900 – “UWP Map on navigated Page can’t change size.” (PR)
  • 41919 – “SearchBar crash because set FontFamily in UWP global FontFamily style” (PR)
  • 42000 – “Unable to use comma (”,“) as decimal point” (PR)
  • 42084 – “Entry Bound to a Double Does Not Accept ‘,’ As Decimal Separator” (PR)
  • 42151 – “UWP Map VisibleRegion is calculated incorrectly” (PR)
  • 42678 – “[Android] System.ObjectDisposedException when tapping a toolbar button after switching tabs.” (PR)
  • 43007 – “Controls nested in StackLayout need to inherit IsEnabled property” (PR)
  • 43519 – “[UWP] MasterDetail page ArguementException when nested in a TabbedPage and returning from modal page” (PR)
  • 43527 – “Page title does not change when Title property is set in code or via binding to a ViewModel” (PR)
  • 43694 – “StaticResource does not work for x:String and OnPlatform” (PR)
  • 43783 – “Most Device Styles do not render correctly in Windows Phone 8.1 (RT) applications” (PR)
  • 43867 – “Numeric keyboard shows text / default keyboard when back button is hit” (PR)
  • 43941 – “Memory leak with ListView’s RecycleElement on iOS” (PR)
  • 44047 – “Memory leak when using SetBackButtonTitle on iOS” (PR)
  • 44096 – “Grid, StackLayout, and ContentView do not pass IsEnabled changes to their children on Android” (PR)
  • 44176 – “InputTransparent fails if BackgroundColor not explicitly set on Android” (PR)
  • 44213 – “Can’t bind to specific properties through OnPlatform” (PR)
  • 44216 – “No property, bindable property, or event found Wen using xamlc” (PR)
  • 44525 – “Xamarin.Forms Listview Row Height Does Not Adapt In iOS” (PR)
  • 44940 – “ScrollToAsync memory leak on UWP” (PR)
  • 44955 – “UWP: Setting Entry BackgroundColor via Behavior results in sticky unfocused background color” (PR)
  • 44980 – “ActivityIndicator disappears when scrolling” (PR)
  • 45027 – “App crashes when double tapping on ToolbarItem or MenuItem very quickly” (PR)
  • 45067 – “No way of cleanly dismissing soft keyboard in UWP” (PR)
  • 45284 – “Extra tab icons display in iOS when binding Title on TabbedPage” (PR)
  • 45179 – “Views in DataTemplate’s are being created without the template ever loading.” (PR)
  • 45277 – “On UWP, Entry with IsPassword = true does not allow selection of characters” (PR)
  • 45299 – “Using a custom TypeConverter causes a ”Sequence contains more than one matching element“ compile error” (PR)
  • 45678 – “Improperly adding two cells to a DataTemplate results in cryptic XamlC error” (PR)
  • 45874 – “Effect not attaching to ScrollView” (PR)
  • 45891 – “XamlParseException Cannot use OnIdiom with an inherited type.” (PR)
  • 45924 – “On UWP, SearchBar getting focus results in page scrolling unnecessarily” (PR)
  • 46458 – “Grid.IsEnabled property is not working” (PR)
  • 46601 – “MessagingCenter is static” (PR)
  • 46972 – “[Win] ListViews not respecting binding when a GRID is used in the data template”
  • 47701 – “Label inside ViewCell from ListView will clear if updated after await Task.Delay(anyNumber)” (PR)
  • 47923 – “Vectors don’t work in Images, and work badly in Buttons” (PR)
  • 48378 – “For builds on Mac, XamlC or Cecil incorrectly updates .mdb files for iOS apps, maybe only when the Xamarin.Build.Download package is also used” (PR)
  • 49384 – “NavigationPage.BarTextColorProperty not working with FormsApplicationActivity in API 21” (PR)
  • 50540 – “PullToRefresh causes crash when context action option is open” (PR)
  • 50584 – “[UWP] Setting ActivityIndicator.IsRunning=”false“ shows the ActivityIndicator” (PR)
  • 50706 – “A picker in a grid in a viewcell in a tableview does not display the selected item (Windows only)”
  • 51236 – “[WinRT] Setting a MasterDetailPage’s IsPresented to false will not immediately update the layout to hide the Master on desktop” (PR)
  • 51652 – “Toggling the Header/Footer on a ListView Throws an NRE” (PR)
  • 51778 – “XamlC needs Portable .pdb support” (PR)
  • 51941 – “Add Highlighted/IsHighlighted property to Button of XF” (PR)
  • 52893 – “FileImageSource is improperly used” (PR)
  • 52266 – “Picker.Focus() does not work on Windows 8.1 and UWP (Windows Desktop) Breaking Behavior Change; see PR” (PR)
  • 52318 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 52507 – “UI Rendering routine is too slow, here is a fix to make it instant.” (PR)
  • 52962 – “iOS ListView PullToRefresh not showing activity indicator” (PR)
  • 53113 – “Xamarin.Forms.Map crash on UWP” (PR)
  • 53215 – “Master Details Hamburger Menu Icon not displayed on UWP since V2.3.2.127” (PR)
  • 53224 – “CanExecute not used in ViewCells in UWP” (PR)
  • 53275 – “IProvideValueTarget TargetProperty always null” (PR)
  • 53417 – “Clearing Effects collection results in NullReferenceException” (PR)
  • 53427 – “UWP EntryCell Label Not Correct Color” (PR)
  • 53503 – “Inconsitent behaviour of xaml x:TypeArguments when using nested generic arguments” (PR)
  • 53515 – “F#: Loading images from files causes a null reference exception” (PR)
  • 53803 – “Issue where using FormsApplicationActivity crashes on latest nightlies after PR631.” (PR)
  • 54146 – “List view memory leak when using Recycle Element Caching Strategy” (PR)
  • 54153 – “Displaying UIImagePickerController fails to show camera feed” (PR)

Internal

  • [Internal] Normalize Obsolete attributes (PR)
  • [Internal] VSTS support (PR)
  • [Internal] Implicit impl of controller ifaces (PR)
  • [Internal] Add internal XF.Registrar.RegisterAll b/c previewer needs it (PR)
  • [Internal] Remove InternalsVisibleTo from Core to XF.Platforms.* (PR)
  • [Internal] Add EditorBrowsableAttribute to public classes/interfaces in XF.Internals (PR)
  • [Internal] Robust doc change detection (PR)
  • [Internal] IEditorController (PR)
  • [Internal][Win] Make WinRT/UWP platform classes more maintainable (PR)
  • [Internal] Checkout docs using unix line endings (PR)
  • [Internal] Force git to checkout docs using unix line endings (PR)
  • [Internal] Update ListProxyTest.WeakToWeak so it works in Release mode (PR)
  • [UITests] Add Xamarin.Forms.Core.UITests.Shared (PR)

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Pre-release: Xamarin.Forms 2.3.5.233

We’ve pushed Xamarin.Forms 2.3.5.233-pre1 to NuGet. To install the pre-release, check the pre-release option in your NuGet package manager and install this version.

If you have a bug to report, drop us a detailed report here so we can troubleshoot.

Important notes

  • Behavior change: Calling Focus on a Picker on WinRT/UWP will now open the drop down.
  • Deprecation: Android IVisualElementRenderer.ViewGroup is now obsolete. Please use View instead.

2.3.5.233-pre1

Enhancements & Other Changes

  • [Evolution] – MacOS (PR)
  • [Evolution] – Basic Accessibility Support (PR)
  • [Evolution] – “[Enhancement] Map renderer extensibility” (PR)
  • [All] Add pressed and released events to Button (PR)
  • [All] Move XF.ConcurrentDictionary to WP8 project (PR)
  • [All] Reduce overhead of pushing existing navigation stack (PR)
  • [Android] Added Section indexes when FastScrolled is enabled (PR)
  • [Android] Fast Renderers (PR)
  • [Android] Fix NRE when RecycleElement is on and list is scrolled quickly on Android (PR)
  • [Android] Fixed issue where Android Hints were causing a “.” to be placed on al… (PR)
  • [Android] Small performance fixes to ListViewRenderer, PlatformSpecific IsFastScrollEnabled (PR)
  • [Android] UI tests for InputTransparent and fixes for Android/Windows (PR)
  • [Core] Add default parameter value of zero to INavigationPageController.Peek() (PR)
  • [Core] Add TV to TargetIdiom (PR)
  • [Core] Added RootPage to NavigationPage (PR)
  • [Core] Align iOS, Android, Windows handling of tap gesture event bubbling (PR)
  • [Core] Fix internal children clear logic (PR)
  • [Core] fix NIE in Span (PR)
  • [Core] ITextElement and TextElement (PR)
  • [Core] move the Font proxying into FontElement (PR)
  • [Core] Share BP across IFontElement implementors (PR)
  • [Core] Split Windows RuntimePlatform into UWP and WinRT (PR)
  • [Core] support more color format in ColorTypeConverter (PR)
  • [Core] Update RelativeLayout to make it respond to constraint changes (PR)
  • [Internal] Fix accessibility gallery (PR)
  • [iOS, Android] Throw InvalidOperationException when ViewCell View is null (PR)
  • [iOS] Dispose Entry and Editor properly and automate GC checks (PR)
  • [iOS] Dispose pickers properly and automate GC checks (PR)
  • [iOS] Expose row animation properties in ListViewRenderer (PR)
  • [iOS] Fix for nullreferenceexception in TabbedRenderer on iOS when it has are no children (yet) (PR)
  • [iOS] Fix obsolete constructor in ContextActionCell (PR)
  • [iOS] Inherit Transitioning Delegate from Child (ModalWrapper) (PR)
  • [iOS] TabbedRenderer / load icons from custom sources (from embedded svg for example) (PR)
  • [macOS] Adds Scrollbars to ListViews and ScrollViews (PR)
  • [macOS] Fixed Tab NSImage crash in TabbedPageRenderer (PR)
  • [Xaml] decorate markup and value providers to speed up inflating (PR)
  • [Xaml] empty service provider (PR)
  • [Xaml] no longer require a ServiceProvider for Trigger and PropertyCo… (PR)
  • [Xaml] Null compiled markup (PR)
  • [Xaml] Resource loading (PR)
  • [XamlC] compile ListStringTypeConverter (PR)
  • [XamlC] compiled TypeExtension (PR)
  • [XamlC] complete the Setter/Trigger fix (PR)
  • [XamlC] debug (PR)
  • [XamlC] Fix debugging tests (PR)
  • [XamlC] supports ‘using:’ xmlns declarations (PR)

Bug Fixes

  • 27194 – “Possible Memory Leak with ContextAction” (PR)
  • 27731 – “[Android] Action Bar can not be controlled reliably on MasterDetailPage” (PR)
  • 29247 – “iOS Device.OpenUri breaks with encoded params” (PR)
  • 30166 – “Problem with NavigationBar.BarBackgroundColor on Lollipop” (PR)
  • 31415 – “ListView Does Not Update After GC When Collection Uses Weak References” (PR)
  • 32206 – “ContextActions cause memory leak: Page is never destroyed” (PR)
  • 32847 – “Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker” (PR)
  • 32865 – “On MasterDetailPage trying to change Icon of Master page doesn’t work if another view is pushed and Image is renderer in blue” (PR)
  • 32956 – “Setting ListView.SelectedItem to null does not remove list item highlight when list item is tapped multiple times quickly” (PR)
  • 39407 – “Picker wrong SelectedIndex value” (PR)
  • 40139 – “Changing the Windows 10 System Theme Color causes ListView text to disappear.” (PR)
  • 40251 – “Cannot style Buttons natively using UIButton.Appearance” (PR)
  • 40906 – “CDATA ignored in XAML layout” (PR)
  • 41600 – “ListView.ScrollTo does not behave as per documentation on UWP” (PR)
  • 41619 – “After updating to lastest Xamarin for VS 2015, the UWP Slider Value binding no longer works” (PR)
  • 41778 – “Slider Inside ScrollView Will Open MasterDetailPage.Master” (PR)
  • 41900 – “UWP Map on navigated Page can’t change size.” (PR)
  • 41919 – “SearchBar crash because set FontFamily in UWP global FontFamily style” (PR)
  • 42000 – “Unable to use comma (”,“) as decimal point” (PR)
  • 42084 – “Entry Bound to a Double Does Not Accept ‘,’ As Decimal Separator” (PR)
  • 42151 – “UWP Map VisibleRegion is calculated incorrectly” (PR)
  • 42678 – “[Android] System.ObjectDisposedException when tapping a toolbar button after switching tabs.” (PR)
  • 43007 – “Controls nested in StackLayout need to inherit IsEnabled property” (PR)
  • 43519 – “[UWP] MasterDetail page ArguementException when nested in a TabbedPage and returning from modal page” (PR)
  • 43527 – “Page title does not change when Title property is set in code or via binding to a ViewModel” (PR)
  • 43694 – “StaticResource does not work for x:String and OnPlatform” (PR)
  • 43783 – “Most Device Styles do not render correctly in Windows Phone 8.1 (RT) applications” (PR)
  • 43867 – “Numeric keyboard shows text / default keyboard when back button is hit” (PR)
  • 43941 – “Memory leak with ListView’s RecycleElement on iOS” (PR)
  • 44047 – “Memory leak when using SetBackButtonTitle on iOS” (PR)
  • 44096 – “Grid, StackLayout, and ContentView do not pass IsEnabled changes to their children on Android” (PR)
  • 44176 – “InputTransparent fails if BackgroundColor not explicitly set on Android” (PR)
  • 44213 – “Can’t bind to specific properties through OnPlatform” (PR)
  • 44216 – “No property, bindable property, or event found Wen using xamlc” (PR)
  • 44525 – “Xamarin.Forms Listview Row Height Does Not Adapt In iOS” (PR)
  • 44940 – “ScrollToAsync memory leak on UWP” (PR)
  • 44955 – “UWP: Setting Entry BackgroundColor via Behavior results in sticky unfocused background color” (PR)
  • 44980 – “ActivityIndicator disappears when scrolling” (PR)
  • 45027 – “App crashes when double tapping on ToolbarItem or MenuItem very quickly” (PR)
  • 45067 – “No way of cleanly dismissing soft keyboard in UWP” (PR)
  • 45284 – “Extra tab icons display in iOS when binding Title on TabbedPage” (PR)
  • 45179 – “Views in DataTemplate’s are being created without the template ever loading.” (PR)
  • 45277 – “On UWP, Entry with IsPassword = true does not allow selection of characters” (PR)
  • 45299 – “Using a custom TypeConverter causes a ”Sequence contains more than one matching element“ compile error” (PR)
  • 45678 – “Improperly adding two cells to a DataTemplate results in cryptic XamlC error” (PR)
  • 45874 – “Effect not attaching to ScrollView” (PR)
  • 45891 – “XamlParseException Cannot use OnIdiom with an inherited type.” (PR)
  • 45924 – “On UWP, SearchBar getting focus results in page scrolling unnecessarily” (PR)
  • 46458 – “Grid.IsEnabled property is not working” (PR)
  • 46601 – “MessagingCenter is static” (PR)
  • 46972 – “[Win] ListViews not respecting binding when a GRID is used in the data template”
  • 47701 – “Label inside ViewCell from ListView will clear if updated after await Task.Delay(anyNumber)” (PR)
  • 47923 – “Vectors don’t work in Images, and work badly in Buttons” (PR)
  • 48378 – “For builds on Mac, XamlC or Cecil incorrectly updates .mdb files for iOS apps, maybe only when the Xamarin.Build.Download package is also used” (PR)
  • 49384 – “NavigationPage.BarTextColorProperty not working with FormsApplicationActivity in API 21” (PR)
  • 50540 – “PullToRefresh causes crash when context action option is open” (PR)
  • 50584 – “[UWP] Setting ActivityIndicator.IsRunning=”false“ shows the ActivityIndicator” (PR)
  • 50706 – “A picker in a grid in a viewcell in a tableview does not display the selected item (Windows only)”
  • 51236 – “[WinRT] Setting a MasterDetailPage’s IsPresented to false will not immediately update the layout to hide the Master on desktop” (PR)
  • 51652 – “Toggling the Header/Footer on a ListView Throws an NRE” (PR)
  • 51778 – “XamlC needs Portable .pdb support” (PR)
  • 51941 – “Add Highlighted/IsHighlighted property to Button of XF” (PR)
  • 52893 – “FileImageSource is improperly used” (PR)
  • 52266 – “Picker.Focus() does not work on Windows 8.1 and UWP (Windows Desktop) Breaking Behavior Change; see PR” (PR)
  • 52318 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 52507 – “UI Rendering routine is too slow, here is a fix to make it instant.” (PR)
  • 52962 – “iOS ListView PullToRefresh not showing activity indicator” (PR)
  • 53113 – “Xamarin.Forms.Map crash on UWP” (PR)
  • 53215 – “Master Details Hamburger Menu Icon not displayed on UWP since V2.3.2.127” (PR)
  • 53224 – “CanExecute not used in ViewCells in UWP” (PR)
  • 53275 – “IProvideValueTarget TargetProperty always null” (PR)
  • 53417 – “Clearing Effects collection results in NullReferenceException” (PR)
  • 53427 – “UWP EntryCell Label Not Correct Color” (PR)
  • 53503 – “Inconsitent behaviour of xaml x:TypeArguments when using nested generic arguments” (PR)
  • 53515 – “F#: Loading images from files causes a null reference exception” (PR)
  • 53803 – “Issue where using FormsApplicationActivity crashes on latest nightlies after PR631.” (PR)
  • 54146 – “List view memory leak when using Recycle Element Caching Strategy” (PR)
  • 54153 – “Displaying UIImagePickerController fails to show camera feed” (PR)

Internal

  • [Internal] Normalize Obsolete attributes (PR)
  • [Internal] VSTS support (PR)
  • [Internal] Implicit impl of controller ifaces (PR)
  • [Internal] Add internal XF.Registrar.RegisterAll b/c previewer needs it (PR)
  • [Internal] Remove InternalsVisibleTo from Core to XF.Platforms.* (PR)
  • [Internal] Add EditorBrowsableAttribute to public classes/interfaces in XF.Internals (PR)
  • [Internal] Robust doc change detection (PR)
  • [Internal] IEditorController (PR)
  • [Internal][Win] Make WinRT/UWP platform classes more maintainable (PR)
  • [Internal] Checkout docs using unix line endings (PR)
  • [Internal] Force git to checkout docs using unix line endings (PR)
  • [UITests] Add Xamarin.Forms.Core.UITests.Shared (PR)

Discuss this post on the Xamarin Forums

Service Release: Xamarin.Forms 2.3.4.231

We’ve pushed Xamarin.Forms 2.3.4.231 to NuGet.

Important notes

  • Behavior Change (iOS): ViewDidDisappear may not be reliably called in custom renderers. Please be sure to override Dispose to do any object cleanup that you may be doing in ViewDidDisappear to prevent any possible memory leaks in your custom renderers. (53351)
  • Behavior Change (UWP): Desktop is now a supported Idiom, so your UWP apps will return this value on desktop contexts. Please be aware that Phone will still be returned in continuum scenarios.
  • Behavior Change: Merged ResourceDictionaries will now return a Count that is consistent with the content in the enumeration instead of the total Count of Resources.
  • Breaking Change: Attached Properties are now compiled when XamlC is enabled! If you have XamlC enabled, you must implement a public getter/setter for all attached properties to prevent a compile time error.

2.3.4.231-sr1

  • [2.3.4][Android] OnResume assumed that _application had been set (PR)
  • [Xaml][2.3.4] Do not emit implict_op if from/to are same type (PR)
  • [C][2.3.4] Lookup in RD also lookup in merged RDs (PR)
  • 54334 – “Styles will override properties on UI-Elements when changing resource dictionaries” (PR)

For additional details see the release notes for 2.3.4.224.

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Stable Release: Xamarin.Forms 2.3.4.224

We’ve pushed Xamarin.Forms 2.3.4.224 to NuGet.

Important notes

  • Behavior Change (iOS): ViewDidDisappear may not be reliably called in custom renderers. Please be sure to override Dispose to do any object cleanup that you may be doing in ViewDidDisappear to prevent any possible memory leaks in your custom renderers. (53351)
  • Behavior Change (UWP): Desktop is now a supported Idiom, so your UWP apps will return this value on desktop contexts. Please be aware that Phone will still be returned in continuum scenarios.
  • Behavior Change: Merged ResourceDictionaries will now return a Count that is consistent with the content in the enumeration instead of the total Count of Resources.
  • Breaking Change: Attached Properties are now compiled when XamlC is enabled! If you have XamlC enabled, you must implement a public getter/setter for all attached properties to prevent a compile time error.

2.3.4.221-pre6

  • [iOS] Prevent NRE when page is switched on Appearing (PR)
  • [A]Fix potential crash when calling ClearFocus in SearchBarRenderer (PR)
  • [Android] Convert Android maps to GetMapAsync call (PR)
  • 38723 – “Update Content in Picker’s SelectedIndexChanged event causes NullReferenceException” (PR)
  • 42559 – “LineBreakMode does not work on UWP” (PR)
  • 45330 – “System.ObjectDisposedException: Cannot access a disposed object. Object name: ‘Android.Views.GestureDetector’.” (PR)
  • 52620 – “[iOS] Header in MasterDetailPage overwrites status bar” (PR)
  • 53203 – “XAMLC: AttachedProperty not found” (PR)
  • 53362 – “Layout regression in Grid on iOS: HorizontalOption = Center does not center” (PR)
  • 53381 – “Templated views no longer rendering (as of pre3)” (PR)
  • 53834 – “incorrect row heights on ios when using groupheadertemplate in Xamarin.Forms 2.3.4.214-pre5” (PR)
  • 53909 – “XML drawables cannot be used as ToolbarItem.Icon” (PR)

2.3.4.214-pre5

  • 51536 – “[iOS] Height of ViewCell and Height of ContextAction incorrectly measured” (PR)

2.3.4.212-pre4

  • 51642 – “[UWP] Picker doesnt show items in 2.3.4.184-pre1 – works in 2.3.3.180” (PR)
  • 51553 – “[UWP] Toolbar not shown for initial Detail page in MasterDetailPage” (PR)
  • 51802 – “[UWP] Detail Page Has Navigation Bar Even When Not Inside a NavigationPage” (PR)
  • 52533 – “Xamarin.Forms v2.3.4.192-pre2 Regression: System.ArgumentException: NaN is not a valid value for width” (PR)

2.3.4.211-pre3

  • [AppLinks][Nuget] Remove fix dependency on MonoDroid70 (PR)
  • 47756 – “[2.3.4–171-pre1] TabbedPage doesn’t working fine with forms version 2.3.4.171-pre1” (PR)
  • 51238 – “Transparent Grid causes Java.Lang.IllegalStateException: Unable to create layer for Platform_DefaultRenderer” (PR)
  • 51505 – “ObjectDisposedException On Effect detachment.” (PR)
  • 52622 – “”Missing Value for Setter“ error when using property element syntax in Style” (PR)
  • 52885 – “ActivityIndicatorView does not null check the IndeterminateDrawable” (PR)

2.3.4.192-pre2

  • [iOS] Remove “Enabled” usage on AdjustsFontSizeToFitWidth (PR)
  • [iOS] redraw Frame on CornerRadius changed (PR)
  • [Android] Add MonoAndroid70 to Forms/Map .nuspec (PR)
  • [Android] Add MonoAndroid70 to Forms/Map .nuspec (PR)
  • 49228 – “XAMLC NRE when x:Static is used on a const defined in seperate assembly” (PR)
  • 51503 – “NullReferenceException and crash on VisualElement finalization.” (PR)
  • 51567 – “XamlC: ”The given key was not present in the dictionary.“ in some xaml files” (PR)
  • 51703 – “MessagingCenter.Unsubscribe unsubbs ALL instances that has subscribed to the message” (PR)

2.3.4.184-pre1

Enhancements

  • [Enhancement][Core] new OnPlatform mechanism (PR)
  • [Enhancement] OnIdiom support for Desktop (UWP) [Breaking change] (PR)
  • [Enhancement] Added CornerRadius property To Frame control (PR)
  • [Enhancement][Android] Show keyboard on app resume if control has focus (PR)
  • [Enhancement] Add extensibility point to load tab icons from another source (PR)
  • [Enhancement] Full feature compatibility with WPF’s Colors class (PR)
  • [Enhancement][iOS] Add Platform Specific feature for setting AdjustsFontSizeToFitWidth on Entry (PR)
  • [Enhancement] Bindable picker (PR)
  • [Enhancement][Core] Add Tizen to TargetPlatform (PR)
  • [Enhancement][Android] Enable 24-hr formatting for Android TimePicker (PR)

Other Changes

  • [Core] Avoid duplicating code in OnPlatform (PR)
  • [Core] Defer initialization of Application.Properties until first use (PR)
  • [Core] Improve registry startup and lookup performance (PR)
  • [Core] Remove unnecessary string replace in Color.FromHex (PR)
  • [Core] Platform specifics naming adjustments (PR)
  • [Android] Fix NRE in packager dispose (PR)
  • [Android] Don’t create FontExtensions Regex unless/until necessary (PR)
  • [Android] NavigationPageRenderer should not create a Fragment unnecessarily (PR)
  • [Android] Internal keyboard hide/show should handle null views (PR)
  • [Android] Prevent crash in event when renderer is null in Layout call. (PR)
  • [Android] Always set a non-null Device.Info (PR)
  • [Android] Make CommitAllowingStateLoss the default for FragmentTransactions (PR)
  • [Android] Set AndroidCodeGenTarget to XAJavaInterop1 (PR)
  • [iOS] Deprecate versions of iOS older than 8 (PR)
  • [iOS] Dispose tap gesture properly in phone master detail renderer (PR)
  • [iOS] Restore old Alert/ActionSheet method for iOS 8 (PR)
  • [iOS] Have PresentAlert hide new window when alert is dismissed (PR)
  • [iOS] Add Platform Specific features for PrefersStatusBarHidden/UIStatusBarAnimation (PR)
  • [iOS] Put the child view underneath the Navigation Bar when translucent (PR)
  • [Windows] Fix Device Style inheritance (PR)
  • [Windows] Modified type cast to appropriate type (PR)
  • [UWP]Track user location when IsShowingUser enabled (PR)
  • [Xaml] use op_implicit defined on Target (PR)
  • [Xaml] change namespace for [XmlnsDef] and make it internal (PR)
  • [Xaml] support arrays as x:Arguments (PR)
  • [Xaml] support short Properties for PropertyCondition (PR)
  • [XamlC] import members on x:Static and factories (PR)
  • [Xamlc] compile data triggers (PR)
  • [Xamlc] remove unused locals (PR)
  • [XamlC] detect duplicate x:Name at compile time (PR)
  • [XamlC] Compile TypeTypeConverter (PR)
  • [XamlC] compiled trigger (PR)
  • [XamlC] Allow compilation of IValueProviders (PR)
  • [XamlC] Optimize stlod ldloc (PR)
  • [XamlC] compile ThicknessTypeConverter (PR)
  • [XamlC] fix loading ulongs, optimize bytecode for longs (PR)
  • [XamlC] Optimize data template IL (PR)
  • [XamlC] support custom markups on ABPs (PR)
  • [XamlC] Type ref tests, and fixes (PR)
  • [XamlC] Compile ContraintTypeConverters (PR)
  • [XamlC] drop ICSharpCode.Decompiler (PR)
  • [XamlC] use correct filePath for XamlC error reporting (PR)
  • [XamlC] TypedBindings, some tests, a compiler, … (PR)
  • [Xaml] more primitive types (PR)
  • [Xaml] cleanup xmlns usage, add XmlnsDefinition (PR)
  • [UITest] Update to UITest 2.0.5 (PR)
  • [Internal] Add sample HanselForms and TwitterDemo to ControlGallery (PR)

Bug Fixes

  • 26104 – “In Android cannot remove the divider line between header and listitems.” (PR)
  • 28650 – “In a Listview on iOS, ”andExpand“ does not expand when text is two lines long” (PR)
  • 28953 – “Device.StartTimer (still) behaves differently on different platforms” (PR)
  • 29110 – “VerticalOptions = LayoutOptions.Center or CenterAndExpand, of Sliders on Windows Phone does not result in centered display” (PR)
  • 31141 – “Change Entry keyboard type while typing” (PR)
  • 33248 – “Entry.Completed calling Editor.Focus() inserts new line to the focused Editor in iOS” (PR)
  • 36846 – “ActionBar does not dismiss when content which called it is removed” (PR)
  • 36907 – “[Android] PopToRootAsync() Not Working From OnResume()”
  • 38204 – “[iOS] Picker Fires SelectedIndexChanged Early” (PR)
  • 38284 – “when creating a map in iOS, if the map is not visible when the page is created the zoom level is off” (PR)
  • 38989 – “[Android] NullReferenceException when using a custom ViewCellRenderer” (PR)
  • 39312 – “[UWP] OnIdiom.Desktop property does not exist.” (PR)
  • 39359 – “Image View does cache failed HTTP responses” (PR)
  • 39489 – “[iOS] Memory leak when using NavigationPage with Maps” (PR)
  • 40073 – “Toolbar items are not not functioning properly on UWP” (PR)
  • 41054 – “Cannot update Entry.Text from attached Behavior on UWP” (PR)
  • 41415 – “ScrollX and ScrollY values are not consistent with iOS” (PR)
  • 42055 – “[UWP][WinRT] ScrollView/ListView Bottom Cut Off in a Modal Page” (PR)
  • 42264 – “MergedWith doesn’t work at application level” (PR)
  • 42651 – “Pushing a page on the navigation stack while device is rotating crashes the app” (PR)
  • 42926 – “[Android] TableSection without Title is rendered as empty TextCell” (PR)
  • 43313 – “Adding an item to ListView ItemSource has unexpected animation with different height rows and HasUnevenRows is true” (PR)
  • 43429 – “Slider with minimum greater than 0 gets incorrect bound value on Android” (PR)
  • 43469 – “execute await App.Current.MainPage.DisplayAlert() twice will crash on UWP real phone” (PR)
  • 43639 – “Maps control does not keep its center when resized” (PR)
  • 43735 – “Multiple Swipe on ContextActions” (PR)
  • 44074 – “OnDetachingFrom for Behavior is never called, therefore memory can leak due to event handlers not being unbound” (PR)
  • 44453 – “[UWP] ToolbarItem Text hard to see when BarTextColor is light” (PR)
  • 44830 – “ListView not consistently focusing at the end of the list.” (PR)
  • 45092 – “Group property of ItemTappedEventArgs can’t be cast to original type, TemplatedItemList, since it is internal. [Breaking change]” (PR)
  • 45593 – “UWP: NavigationPage leaks memory” (PR)
  • 45702 – “Disabling back press on modal page causes app to crash” (PR)
  • 45926 – “MessagingCenter prevents subscriber from being collected” (PR)
  • 46921 – “XAML compiler produces invalid IL for resources using property element syntax, or even attributes” (PR)
  • 47203 – “Remove WeakReference IsAlive true references in XF source code” (PR)
  • 47938 – “BarBackgroundColor not set on UWP”
  • 48236 – “BackgroundColor for Stepper behaves differently on iOS to Android and UWP” (PR)
  • 49104 – “Platform-specific IsNavigationBarTranslucent does not work on iOS” (PR)
  • 49307 – “XAML compilation throw exception: System.InvalidProgramException” (PR)
  • 49648 – “Xamarin Forms iOS Effect not called on WebView” (PR)
  • 51142 – “Toolbar not showing when using PushAsync on UWP” (PR)
  • 25677 – “Null reference crash on Amazon Fire TV” (PR)
  • 31422 – “Xamarin Forms Entry control and iOS Keyboard Shortcuts Problem” (PR)
  • 34553 – “Stackoverflow when reordering tabs in a TabbedPage” (PR)
  • 35736 – “Editor text value not updated when focus is lost” (PR)
  • 36802 – “[iOS] UITableViewCellAccessory Partially Hidden When Using RecycleElement” (PR)
  • 37431 – “NavigationRenderer sets Status Bar Style arbitrarily” (PR)
  • 38019 – “Can’t remove title bar in Material design” (PR)
  • 38265 – “Keyboard suggestions on Forms iOS do not function correctly on last word in Entry” (PR)
  • 38777 – “Inserting 10000 items into ListView causes UWP app to exit” (PR)
  • 38948 – “[UWP] ListViewCachingStrategy.RecycleElement Not Working” (PR)
  • 39489 – “[Android] Memory leak when using NavigationPage with Maps” (PR)
  • 40263 – “3-finger tap causes crash” (PR)
  • 40408 – “[Windows RT] On Appearing not run for Tabbed Page and Master Detail Page” (PR)
  • 40722 – “Using FormsAppCompatActivity calls OnDisappearing on device sleep” (PR)
  • 40911 – “NRE with Facebook Login” (PR)
  • 40943 – “On Windows Store 8.1 and Windows UWP, BorderWidth on Button is ignored” (PR)
  • 41219 – “AutomationId is not set to the native controls of a TabbedPages tab items” (PR)
  • 41271 – “[UWP] Memory Leak from ListView in TabbedPage” (PR)
  • 41322 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 41418 – “Margin inside ScrollView not working properly” (PR)
  • 41535 – “UIViewControllerBasedStatusBarAppearance is set to false.” (PR)
  • 42096 – “[iOS] Entry Text Binding fails when iOS Auto-corrects text when the Entry loses focus (clicking outside of Entry)” (PR)
  • 42100 – “[UWP] Default Button Color is set to Transparent” (PR)
  • 42214 – “Project crashes with NRE in Main.cs – Xamarin Studio” (PR)
  • 42530 – “Entry.Text not updated when modified by iOS Autocorrect, word suggestions, or spellchecker” (PR)
  • 42621 – “iOS: DateTimeOffset doesn’t get correct TimeZone offset when you change the Date TimeZone in System settings” (PR)
  • 42832 – “Scrolling in ListView with active ContextActions causes System.NullReferenceException” (PR)
  • 42883 – “ScrollViewRenderer.OnTouchEvent not being called in when scrollView.Orientation = Horizontal on Android” (PR)
  • 43108 – “android:visibility=”gone“ in Tabbar.axml does not reclaim space” (PR)
  • 43301 – “Error in generated part of xaml page” (PR)
  • 43569 – “ToolbarItem Icon from local file” (PR)
  • 43663 – “PodalPushed and ModalPopped not working on UWP” (PR)
  • 43734 – “[Android AppCompat] TabbedPage tab title cannot be updated” (PR)
  • 43815 – “[Android] App.MainPage incorrect behaviour for view appearing and disappearing” (PR)
  • 44044 – “TabbedPage stealing gestures” (PR)
  • 44160 – “Android/Forms OnDisappearing firing minimized” (PR)
  • 44175 – “NavigationPageRenderer.ctor(IntPtr,JniHandleOwnership) constructor is missing error” (PR)
  • 44461 – “ScrollToPosition.Center works differently on Android and iOS” (PR)
  • 44476 – “[Android] Unwanted margin at top of details page when nested in a NavigationPage” (PR)
  • 44584 – “UWP – Editor: changing the background color will only take effect after the entry gained focus [Breaking change: Editor is now derived from FormsTextBox instead of TextBox]” (PR)
  • 44609 – “Easing.SpringOut not working with TranslateTo” (PR)
  • 44679 – “Error when toggling entry view’s IsPassword property (only on uwp)” (PR)
  • 44777 – “BarTextColor changes color for more than just the Navigation page” (PR)
  • 44803 – “iOS: Device orientation change incorrectly resizes NavigationPage” (PR)
  • 44954 – “[Windows] Toggling IsPassword on Multiple Entries Causes Crash” (PR)
  • 45178 – “ProgressBarRenderer can crash in native.” (PR)
  • 45255 – “[WinRT] Back Button Not Visible If Current Page Does Not Have a Title” (PR)
  • 45725 – “ActivityIndicator color property not working in windows 8.1” (PR)
  • 45743 – “Threading problem with PushAsync() after DisplayAlert() on iOS” (PR)
  • 45835 – “There is a blank space on the screen top on UWP 14393(Windows 10 1607 Mobile)” (PR)
  • 46494 – “Hardware/Software back button from MainPage of type MasterDetail causes ‘java.lang.IllegalStateException: Activity has been destroyed’” (PR)
  • 46630 – “[Xamarin.Forms, Android] Context menu of the Editor control is not working in the ListView” (PR)
  • 46938 – “Toolbar Subtitle Reset When Screen Rotated” (PR)
  • 47637 – “ipad PopToRootAsync crashes with NullPointerException” (PR)
  • 47367 – “java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState” (PR)
  • 51773 – “XAMLC: Member ‘X’ is declared in another module and needs to be imported” (PR)

Discuss this post on the Xamarin Forums

Pre-release: Xamarin.Forms 2.3.4.221-pre6

We’ve pushed Xamarin.Forms 2.3.4.221-pre6 to NuGet. To install the pre-release, check the pre-release option in your NuGet package manager and install this version.

If you’ve got a bug to report, drop us a detailed report here so we can troubleshoot.

Important notes

  • Behavior Change (iOS): ViewDidDisappear may not be reliably called in custom renderers. Please be sure to override Dispose to do any object cleanup that you may be doing in ViewDidDisappear to prevent any possible memory leaks in your custom renderers. (53351)
  • Behavior Change (UWP): Desktop is now a supported Idiom, so your UWP apps will return this value on desktop contexts. Please be aware that Phone will still be returned in continuum scenarios.

2.3.4.221-pre6

  • [iOS] Prevent NRE when page is switched on Appearing (PR)
  • [A]Fix potential crash when calling ClearFocus in SearchBarRenderer (PR)
  • [Android] Convert Android maps to GetMapAsync call (PR)
  • 38723 – “Update Content in Picker’s SelectedIndexChanged event causes NullReferenceException” (PR)
  • 42559 – “LineBreakMode does not work on UWP” (PR)
  • 45330 – “System.ObjectDisposedException: Cannot access a disposed object. Object name: ‘Android.Views.GestureDetector’.” (PR)
  • 52620 – “[iOS] Header in MasterDetailPage overwrites status bar” (PR)
  • 53203 – “XAMLC: AttachedProperty not found” (PR)
  • 53362 – “Layout regression in Grid on iOS: HorizontalOption = Center does not center” (PR)
  • 53381 – “Templated views no longer rendering (as of pre3)” (PR)
  • 53834 – “incorrect row heights on ios when using groupheadertemplate in Xamarin.Forms 2.3.4.214-pre5” (PR)
  • 53909 – “XML drawables cannot be used as ToolbarItem.Icon” (PR)

2.3.4.214-pre5

  • 51536 – “[iOS] Height of ViewCell and Height of ContextAction incorrectly measured” (PR)

2.3.4.212-pre4

  • 51642 – “[UWP] Picker doesnt show items in 2.3.4.184-pre1 – works in 2.3.3.180” (PR)
  • 51553 – “[UWP] Toolbar not shown for initial Detail page in MasterDetailPage” (PR)
  • 51802 – “[UWP] Detail Page Has Navigation Bar Even When Not Inside a NavigationPage” (PR)
  • 52533 – “Xamarin.Forms v2.3.4.192-pre2 Regression: System.ArgumentException: NaN is not a valid value for width” (PR)

2.3.4.211-pre3

  • [AppLinks][Nuget] Remove fix dependency on MonoDroid70 (PR)
  • 47756 – “[2.3.4–171-pre1] TabbedPage doesn’t working fine with forms version 2.3.4.171-pre1” (PR)
  • 51238 – “Transparent Grid causes Java.Lang.IllegalStateException: Unable to create layer for Platform_DefaultRenderer” (PR)
  • 51505 – “ObjectDisposedException On Effect detachment.” (PR)
  • 52622 – “”Missing Value for Setter“ error when using property element syntax in Style” (PR)
  • 52885 – “ActivityIndicatorView does not null check the IndeterminateDrawable” (PR)

2.3.4.192-pre2

  • [iOS] Remove “Enabled” usage on AdjustsFontSizeToFitWidth (PR)
  • [iOS] redraw Frame on CornerRadius changed (PR)
  • [Android] Add MonoAndroid70 to Forms/Map .nuspec (PR)
  • [Android] Add MonoAndroid70 to Forms/Map .nuspec (PR)
  • 49228 – “XAMLC NRE when x:Static is used on a const defined in seperate assembly” (PR)
  • 51503 – “NullReferenceException and crash on VisualElement finalization.” (PR)
  • 51567 – “XamlC: ”The given key was not present in the dictionary.“ in some xaml files” (PR)
  • 51703 – “MessagingCenter.Unsubscribe unsubbs ALL instances that has subscribed to the message” (PR)

2.3.4.184-pre1

Enhancements

  • [Enhancement][Core] new OnPlatform mechanism (PR)
  • [Enhancement] OnIdiom support for Desktop (UWP) [Breaking change] (PR)
  • [Enhancement] Added CornerRadius property To Frame control (PR)
  • [Enhancement][Android] Show keyboard on app resume if control has focus (PR)
  • [Enhancement] Add extensibility point to load tab icons from another source (PR)
  • [Enhancement] Full feature compatibility with WPF’s Colors class (PR)
  • [Enhancement][iOS] Add Platform Specific feature for setting AdjustsFontSizeToFitWidth on Entry (PR)
  • [Enhancement] Bindable picker (PR)
  • [Enhancement][Core] Add Tizen to TargetPlatform (PR)
  • [Enhancement][Android] Enable 24-hr formatting for Android TimePicker (PR)

Other Changes

  • [Core] Avoid duplicating code in OnPlatform (PR)
  • [Core] Defer initialization of Application.Properties until first use (PR)
  • [Core] Improve registry startup and lookup performance (PR)
  • [Core] Remove unnecessary string replace in Color.FromHex (PR)
  • [Core] Platform specifics naming adjustments (PR)
  • [Android] Fix NRE in packager dispose (PR)
  • [Android] Don’t create FontExtensions Regex unless/until necessary (PR)
  • [Android] NavigationPageRenderer should not create a Fragment unnecessarily (PR)
  • [Android] Internal keyboard hide/show should handle null views (PR)
  • [Android] Prevent crash in event when renderer is null in Layout call. (PR)
  • [Android] Always set a non-null Device.Info (PR)
  • [Android] Make CommitAllowingStateLoss the default for FragmentTransactions (PR)
  • [Android] Set AndroidCodeGenTarget to XAJavaInterop1 (PR)
  • [iOS] Deprecate versions of iOS older than 8 (PR)
  • [iOS] Dispose tap gesture properly in phone master detail renderer (PR)
  • [iOS] Restore old Alert/ActionSheet method for iOS 8 (PR)
  • [iOS] Have PresentAlert hide new window when alert is dismissed (PR)
  • [iOS] Add Platform Specific features for PrefersStatusBarHidden/UIStatusBarAnimation (PR)
  • [iOS] Put the child view underneath the Navigation Bar when translucent (PR)
  • [Windows] Fix Device Style inheritance (PR)
  • [Windows] Modified type cast to appropriate type (PR)
  • [UWP]Track user location when IsShowingUser enabled (PR)
  • [Xaml] use op_implicit defined on Target (PR)
  • [Xaml] change namespace for [XmlnsDef] and make it internal (PR)
  • [Xaml] support arrays as x:Arguments (PR)
  • [Xaml] support short Properties for PropertyCondition (PR)
  • [XamlC] import members on x:Static and factories (PR)
  • [Xamlc] compile data triggers (PR)
  • [Xamlc] remove unused locals (PR)
  • [XamlC] detect duplicate x:Name at compile time (PR)
  • [XamlC] Compile TypeTypeConverter (PR)
  • [XamlC] compiled trigger (PR)
  • [XamlC] Allow compilation of IValueProviders (PR)
  • [XamlC] Optimize stlod ldloc (PR)
  • [XamlC] compile ThicknessTypeConverter (PR)
  • [XamlC] fix loading ulongs, optimize bytecode for longs (PR)
  • [XamlC] Optimize data template IL (PR)
  • [XamlC] support custom markups on ABPs (PR)
  • [XamlC] Type ref tests, and fixes (PR)
  • [XamlC] Compile ContraintTypeConverters (PR)
  • [XamlC] drop ICSharpCode.Decompiler (PR)
  • [XamlC] use correct filePath for XamlC error reporting (PR)
  • [XamlC] TypedBindings, some tests, a compiler, … (PR)
  • [Xaml] more primitive types (PR)
  • [Xaml] cleanup xmlns usage, add XmlnsDefinition (PR)
  • [UITest] Update to UITest 2.0.5 (PR)
  • [Internal] Add sample HanselForms and TwitterDemo to ControlGallery (PR)

Bug Fixes

  • 26104 – “In Android cannot remove the divider line between header and listitems.” (PR)
  • 28650 – “In a Listview on iOS, ”andExpand“ does not expand when text is two lines long” (PR)
  • 28953 – “Device.StartTimer (still) behaves differently on different platforms” (PR)
  • 29110 – “VerticalOptions = LayoutOptions.Center or CenterAndExpand, of Sliders on Windows Phone does not result in centered display” (PR)
  • 31141 – “Change Entry keyboard type while typing” (PR)
  • 33248 – “Entry.Completed calling Editor.Focus() inserts new line to the focused Editor in iOS” (PR)
  • 36846 – “ActionBar does not dismiss when content which called it is removed” (PR)
  • 38204 – “[iOS] Picker Fires SelectedIndexChanged Early” (PR)
  • 38284 – “when creating a map in iOS, if the map is not visible when the page is created the zoom level is off” (PR)
  • 38989 – “[Android] NullReferenceException when using a custom ViewCellRenderer” (PR)
  • 39312 – “[UWP] OnIdiom.Desktop property does not exist.” (PR)
  • 39359 – “Image View does cache failed HTTP responses” (PR)
  • 39489 – “[iOS] Memory leak when using NavigationPage with Maps” (PR)
  • 40073 – “Toolbar items are not not functioning properly on UWP” (PR)
  • 41054 – “Cannot update Entry.Text from attached Behavior on UWP” (PR)
  • 41415 – “ScrollX and ScrollY values are not consistent with iOS” (PR)
  • 42055 – “[UWP][WinRT] ScrollView/ListView Bottom Cut Off in a Modal Page” (PR)
  • 42264 – “MergedWith doesn’t work at application level” (PR)
  • 42651 – “Pushing a page on the navigation stack while device is rotating crashes the app” (PR)
  • 42926 – “[Android] TableSection without Title is rendered as empty TextCell” (PR)
  • 43313 – “Adding an item to ListView ItemSource has unexpected animation with different height rows and HasUnevenRows is true” (PR)
  • 43429 – “Slider with minimum greater than 0 gets incorrect bound value on Android” (PR)
  • 43469 – “execute await App.Current.MainPage.DisplayAlert() twice will crash on UWP real phone” (PR)
  • 43639 – “Maps control does not keep its center when resized” (PR)
  • 43735 – “Multiple Swipe on ContextActions” (PR)
  • 44074 – “OnDetachingFrom for Behavior is never called, therefore memory can leak due to event handlers not being unbound” (PR)
  • 44453 – “[UWP] ToolbarItem Text hard to see when BarTextColor is light” (PR)
  • 44830 – “ListView not consistently focusing at the end of the list.” (PR)
  • 45092 – “Group property of ItemTappedEventArgs can’t be cast to original type, TemplatedItemList, since it is internal. [Breaking change]” (PR)
  • 45593 – “UWP: NavigationPage leaks memory” (PR)
  • 45702 – “Disabling back press on modal page causes app to crash” (PR)
  • 45926 – “MessagingCenter prevents subscriber from being collected” (PR)
  • 46921 – “XAML compiler produces invalid IL for resources using property element syntax, or even attributes” (PR)
  • 47203 – “Remove WeakReference IsAlive true references in XF source code” (PR)
  • 47938 – “BarBackgroundColor not set on UWP”
  • 48236 – “BackgroundColor for Stepper behaves differently on iOS to Android and UWP” (PR)
  • 49104 – “Platform-specific IsNavigationBarTranslucent does not work on iOS” (PR)
  • 49307 – “XAML compilation throw exception: System.InvalidProgramException” (PR)
  • 49648 – “Xamarin Forms iOS Effect not called on WebView” (PR)
  • 51142 – “Toolbar not showing when using PushAsync on UWP” (PR)
  • 25677 – “Null reference crash on Amazon Fire TV” (PR)
  • 31422 – “Xamarin Forms Entry control and iOS Keyboard Shortcuts Problem” (PR)
  • 34553 – “Stackoverflow when reordering tabs in a TabbedPage” (PR)
  • 35736 – “Editor text value not updated when focus is lost” (PR)
  • 36802 – “[iOS] UITableViewCellAccessory Partially Hidden When Using RecycleElement” (PR)
  • 37431 – “NavigationRenderer sets Status Bar Style arbitrarily” (PR)
  • 38019 – “Can’t remove title bar in Material design” (PR)
  • 38265 – “Keyboard suggestions on Forms iOS do not function correctly on last word in Entry” (PR)
  • 38777 – “Inserting 10000 items into ListView causes UWP app to exit” (PR)
  • 38948 – “[UWP] ListViewCachingStrategy.RecycleElement Not Working” (PR)
  • 39489 – “[Android] Memory leak when using NavigationPage with Maps” (PR)
  • 40263 – “3-finger tap causes crash” (PR)
  • 40408 – “[Windows RT] On Appearing not run for Tabbed Page and Master Detail Page” (PR)
  • 40722 – “Using FormsAppCompatActivity calls OnDisappearing on device sleep” (PR)
  • 40911 – “NRE with Facebook Login” (PR)
  • 40943 – “On Windows Store 8.1 and Windows UWP, BorderWidth on Button is ignored” (PR)
  • 41219 – “AutomationId is not set to the native controls of a TabbedPages tab items” (PR)
  • 41271 – “[UWP] Memory Leak from ListView in TabbedPage” (PR)
  • 41322 – “OnAppearing/Disappearing triggers for all pages in navigationstack backgrounding/foregrounding app” (PR)
  • 41418 – “Margin inside ScrollView not working properly” (PR)
  • 41535 – “UIViewControllerBasedStatusBarAppearance is set to false.” (PR)
  • 42096 – “[iOS] Entry Text Binding fails when iOS Auto-corrects text when the Entry loses focus (clicking outside of Entry)” (PR)
  • 42100 – “[UWP] Default Button Color is set to Transparent” (PR)
  • 42214 – “Project crashes with NRE in Main.cs – Xamarin Studio” (PR)
  • 42530 – “Entry.Text not updated when modified by iOS Autocorrect, word suggestions, or spellchecker” (PR)
  • 42621 – “iOS: DateTimeOffset doesn’t get correct TimeZone offset when you change the Date TimeZone in System settings” (PR)
  • 42832 – “Scrolling in ListView with active ContextActions causes System.NullReferenceException” (PR)
  • 42883 – “ScrollViewRenderer.OnTouchEvent not being called in when scrollView.Orientation = Horizontal on Android” (PR)
  • 43108 – “android:visibility=”gone“ in Tabbar.axml does not reclaim space” (PR)
  • 43301 – “Error in generated part of xaml page” (PR)
  • 43569 – “ToolbarItem Icon from local file” (PR)
  • 43663 – “PodalPushed and ModalPopped not working on UWP” (PR)
  • 43734 – “[Android AppCompat] TabbedPage tab title cannot be updated” (PR)
  • 43815 – “[Android] App.MainPage incorrect behaviour for view appearing and disappearing” (PR)
  • 44044 – “TabbedPage stealing gestures” (PR)
  • 44160 – “Android/Forms OnDisappearing firing minimized” (PR)
  • 44175 – “NavigationPageRenderer.ctor(IntPtr,JniHandleOwnership) constructor is missing error” (PR)
  • 44461 – “ScrollToPosition.Center works differently on Android and iOS” (PR)
  • 44476 – “[Android] Unwanted margin at top of details page when nested in a NavigationPage” (PR)
  • 44584 – “UWP – Editor: changing the background color will only take effect after the entry gained focus [Breaking change: Editor is now derived from FormsTextBox instead of TextBox]” (PR)
  • 44609 – “Easing.SpringOut not working with TranslateTo” (PR)
  • 44679 – “Error when toggling entry view’s IsPassword property (only on uwp)” (PR)
  • 44777 – “BarTextColor changes color for more than just the Navigation page” (PR)
  • 44803 – “iOS: Device orientation change incorrectly resizes NavigationPage” (PR)
  • 44954 – “[Windows] Toggling IsPassword on Multiple Entries Causes Crash” (PR)
  • 45178 – “ProgressBarRenderer can crash in native.” (PR)
  • 45255 – “[WinRT] Back Button Not Visible If Current Page Does Not Have a Title” (PR)
  • 45725 – “ActivityIndicator color property not working in windows 8.1” (PR)
  • 45743 – “Threading problem with PushAsync() after DisplayAlert() on iOS” (PR)
  • 45835 – “There is a blank space on the screen top on UWP 14393(Windows 10 1607 Mobile)” (PR)
  • 46494 – “Hardware/Software back button from MainPage of type MasterDetail causes ‘java.lang.IllegalStateException: Activity has been destroyed’” (PR)
  • 46630 – “[Xamarin.Forms, Android] Context menu of the Editor control is not working in the ListView” (PR)
  • 46938 – “Toolbar Subtitle Reset When Screen Rotated” (PR)
  • 47637 – “ipad PopToRootAsync crashes with NullPointerException” (PR)
  • 47367 – “java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState” (PR)
  • 51773 – “XAMLC: Member ‘X’ is declared in another module and needs to be imported” (PR)

Discuss this post on the Xamarin Forums

Beta Release: 15.1 Beta Preview 1

We are releasing the first Beta preview of our next major release, called 15.1. This release uses a new naming convention “15.1” that more closely resembles the sub-version numbering of Visual Studio 2017. “15.1” in this new scheme matches up with what Xamarin would have called “Cycle 10” under the old scheme.

Note that this preview release is not yet available in Visual Studio 2017. It will be integrated into the Visual Studio Installer at a future date that follows the upstream VS 2017 release schedule. Xamarin coordination with the upstream schedule has been evolving across the VS 2017 releases, and plans are underway to synchronize more tightly as soon as possible. Watch for additional news on that topic over the next week.

As this is a Beta build, there are some known issues and the possibility of new issues being found during testing. Of course, additional bug reports are still welcome for these preview versions. If you see any suspicious behavior that you wish to report, please file a quick bug.

If you notice an error in this blog post or have trouble downloading one of the installer packages, please let us know in the corresponding forum thread.

Please check out the product release notes to see all the fixes and known issues for this release.


Products Released


Installing the Beta and switching back to Stable

You can install this new Beta version or switch back to the current Stable version by changing updater channels.


Upcoming Release Dates

Alpha 1 – March 1st 2017

Alpha 2 – March 7th 2017

Beta 1 – This Release!