Xamarin.Forms 2.3.1.110-pre1

Build native UIs for iOS, Android, and Windows Phone from a single, shared C# codebase

This is a prerelease version of Xamarin.Forms.
There is a newer version of this package available.
See the version list below for details.
Install-Package Xamarin.Forms -Version 2.3.1.110-pre1
dotnet add package Xamarin.Forms --version 2.3.1.110-pre1
paket add Xamarin.Forms --version 2.3.1.110-pre1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

# 2.3.1-pre1

## Important notes
When upgrading Xamarin.Forms take care not to simply "update all" as that will update the Xamarin.Android.Support packages to an incompatible version. More info [here](https://developer.xamarin.com/guides/xamarin-forms/troubleshooting/).

## New Features

* Added `KeyboardFlags.None` enum value and added `Keyboard.Plain` which uses `KeyboardFlags.None` for its implementation.
* Added `GridLength.Star` as a convenience value to complement the existing `GridLength.Auto`

## Bugs Fixed

* [27417](https://bugzilla.xamarin.com/show_bug.cgi?id=27417) - "Button.Image behaviors differently on each platform and has extra padding even with no Text" Fix: When an image and no text is specified for an image, the image position should default to centered (vertically and horizontally). This fixes a bug in the Android logic which leaves images aligned near the top of the button when the button is sufficiently taller than the image.  
* [31809](https://bugzilla.xamarin.com/show_bug.cgi?id=31809) - "PopToRootAsync isn't working in my Windows Phone Runtime(8.1) project" Fix: When callingPopToRootAsync on 8.1/UWP, the navigation stack was being cleared, but the current page wasn't actually being set, so a crash would subsequently occur if attempting to call it again, for example. This was due to a missing event handler on the NavigationPageRenderer which sets the page to the expected root.  
* [33507](https://bugzilla.xamarin.com/show_bug.cgi?id=33507) - "Android: "System.ArgumentException: 'jobject' must not be IntPtr.Zero" when setting Focus for Picker = True" Fix: ViewRenderer failed to unsubscribe from FocusChangeRequested on disposed and so attempted to dispatch a focus change request to a disposed renderer.  
* [36447](https://bugzilla.xamarin.com/show_bug.cgi?id=36447) - "[Android] PinchGestureRecognizer Only Works on Android API Level 19+" Fix: Fix usage of a API18 only constructor on ScaleGestureDetector  
* [37862](https://bugzilla.xamarin.com/show_bug.cgi?id=37862) - "ListView with CachingStrategy=recycleElement Doesn't respect HasUnevenRows=True " Fix: Don't use the fixed LayoutConstraint when using uneven rows. We were using a fixed LayoutConstraint for the viewcell view, this caused Grid't using '*' (star) to skip computing the size of it's children and returning the cached value.  
* [38284](https://bugzilla.xamarin.com/show_bug.cgi?id=38284) - "when creating a map in iOS, if the map is not visible when the page is created the zoom level is off" Fix: Update the current region of the MKMapView when visible. If the iOS MKMapView is invisible it will update it's region because there's no Frame/Bounds for calculation. We need to make sure we update the current region when the map is visible again.  
* [39187](https://bugzilla.xamarin.com/show_bug.cgi?id=39187) - "UWP Navigation shows duplicate page when performing multiple nav operations"  
* [39486](https://bugzilla.xamarin.com/show_bug.cgi?id=39486) - "HasUnevenRows=true ignored in Forms iOS project in TableView with CustomCell; row heights are not auto-sized"  
* [39802](https://bugzilla.xamarin.com/show_bug.cgi?id=39802) - "Gap between ListView cells even if SeparatorVisablity is set to none"  
* [40005](https://bugzilla.xamarin.com/show_bug.cgi?id=40005) - "[Android] Navigation Bar back button does not show when using InsertPageBefore(insertedPage, page1) to add a page to the stack before the first page."  
* [40333](https://bugzilla.xamarin.com/show_bug.cgi?id=40333) - "[Android] IllegalStateException: Recursive entry to executePendingTransactions"  
* [40639](https://bugzilla.xamarin.com/show_bug.cgi?id=40639) - "Xamarin.Forms 2.1.0.6529 (Android only). Unhandled Exception: Java.Lang.IllegalStateException: Recursive entry to executePendingTransactions when switching MainPage or children of TabbedPage in FormsAppCompatActivity"  
* [40704](https://bugzilla.xamarin.com/show_bug.cgi?id=40704) - "Strange duplication of listview headers when collapsing/expanding sections"   
* [40740](https://bugzilla.xamarin.com/show_bug.cgi?id=40740) - "UWP Platform constructor throws TypeLoadException." Modified calls to ApiInformation.IsTypePresent() in WinRT Platform.cs to compile and run when theStatusBar type is not present.  
* [40830](https://bugzilla.xamarin.com/show_bug.cgi?id=40830) - "AppLinkEntry.KeyValues collection is always empty"  
* [40866](https://bugzilla.xamarin.com/show_bug.cgi?id=40866) - "RegisterLink throws an ArgumentException on Android"  
* [40998](https://bugzilla.xamarin.com/show_bug.cgi?id=40998) - "Hitting Esc when an action sheet displayed on UWP does not result in the await returning" Fix: On UWP, when DisplayActionSheet is being awaited, pressing escape while the ActionSheet is visible would cause it to disappear but not actually return any result. Checking for an escape keypress in the window and setting the result to ContentDialogResult.None (as no button was tapped) returns a result as expected.  
* [41038](https://bugzilla.xamarin.com/show_bug.cgi?id=41038) - "MasterDetailPage loses menu icon on iOS after reusing NavigationPage as Detail" Fix: When a page is being removed we need to make sure we update the left toolbar item to show the master icon or text. We need to pas a reference of the remove page, because the NavigationPage still has that page in the navigation stack, the event fires on the renderer before it's removed from the internal children.  
* [41076](https://bugzilla.xamarin.com/show_bug.cgi?id=41076) - "App Resume hangs on WP 8.1 (Silverlight)"  
* [41078](https://bugzilla.xamarin.com/show_bug.cgi?id=41078) - " [Win 8.1] ListView not visually setting the initially selected item upon creation" Fix: On Windows 8.1, when the SelectedItem property on a ListView was set prior to the page it was contained in displaying, there was no indication of that item being selected (although the value was set) when the page eventually displayed. This is normally indicated via a background color on the cell. Subsequent selections of other items would cause the visual indication to work as expected. Explicitly calling OnElementItemSelected in OnElementChanged if the SelectedItem value has been set resolves this.  
* [41241](https://bugzilla.xamarin.com/show_bug.cgi?id=41241) - "Custom Button Image Missized in Xamarin Forms Cross-platform in the WinPhone App" Fix: Previously, the Windows platforms hard-coded the size of button images to 30x30; this meant that larger images on buttons could not be displayed and smaller images were scaled up. This change removes the hard-coded size and uses the actual size of the image when laying out the button.  
* [41296](https://bugzilla.xamarin.com/show_bug.cgi?id=41296) - "MarkupExtension not found in default namespace"  
* [41404](https://bugzilla.xamarin.com/show_bug.cgi?id=41404) - "Xamarin Forms Master Page (of Master Detail Page) obscures Android status bar with Material Design"  
* [41424](https://bugzilla.xamarin.com/show_bug.cgi?id=41424) - "DatePicker doesn't lose focus on Cancel"   
* [41842](https://bugzilla.xamarin.com/show_bug.cgi?id=41842) - "Set MasterDetailPage.Detail = New Page() twice will crash the application when set MasterBehavior = MasterBehavior.Split" Fix: MasterDetailControl will no longer null out the TCS before it is used. Failure only occurs when the MainPage is swapped out and the Detail page is changed twice. UI test doesn't cover this scenario.  
* [41854](https://bugzilla.xamarin.com/show_bug.cgi?id=41854) - "[UWP] NavigationPage back button remains when resetting Application.Curent.MainPage to ContentPage"  


### Other fixes
* [Android] Isolate fragment management for children of MasterDetailPage
* [Android] Can't reset BarTextColor to default on TabbedPage. Fix: storing default color for TabbedPage bar text on Android so we can reset it if necessary.
* [Android] Fix android StartTimer race condition. This fixes the GREF issue reported by the Android team against Cycle 7
* [iOS] Set the frame of a cell NativeView using the calculated positions and size
* [iOS] Rotation and orientations methods now correctly forwarded in iOS. Allows programmatic rotation locking of screen.
* [UWP] Make wrapper of a ViewCell respect margins
* [WinRT/UWP] Center crop image on AspectFill to provide same experience that Android and iOS curently provide.
* [WinRT] Add base platform as inner proxy navigation to Application, Fix back button issue [see 39187, 41854]
* [XAML] fix Thickness.IsDefault. Bottom was ignored
* Isolate fragment management for children of MasterDetailPage. If an AppCompat MasterDetailPage hosts NavigationPages or TabbedPages in either the Master or Detail sections, those pages are now wrapped in their own Fragment (and use that Fragment's ChildFragmentManager) to isolate their Fragment management operations and avoid recursive entry into the executePendingTransactions() method. Also fixed a disposal bug in the custom MDP renderer in Control Gallery. [see 40333, 40639]
* Implemented the AppIndexProvider on non-AppCompact backend to fix bug on KeyValues on AppLinkEntry [see 40866, 40830]
* Backend renderers now implement the correct position and size of the View of a ViewCell
* Allow Registrar.RegisterAll to be invoked multiple times without causing exception
* Data Pages docs added
* Numerous small doc fixes
* Added Mailing List info to the README.md  

For full details on changes: [https://github.com/xamarin/Xamarin.Forms/compare/2.3.0...beta-2.3.1-pre1]

Version History

Version Downloads Last updated
4.0.0.8055-pre1 2,808 12/4/2018
3.4.0.1008975 75,240 11/15/2018
3.4.0.987044-pre2 1,780 11/8/2018
3.4.0.925479-pre1 5,918 10/18/2018
3.3.0.967583 73,656 11/1/2018
3.3.0.912540 66,014 10/18/2018
3.3.0.893527-pre3 3,539 10/11/2018
3.3.0.871608-pre2 6,055 10/1/2018
3.3.0.840541-pre1 2,952 9/20/2018
3.2.0.871581 60,359 10/3/2018
3.2.0.839982 72,362 9/17/2018
3.2.0.809874-pre3 2,737 9/10/2018
3.2.0.729530-pre2 7,521 8/14/2018
3.2.0.637442-pre1 6,738 7/17/2018
3.1.0.697729 247,223 8/1/2018
3.1.0.637273 74,702 7/11/2018
3.1.0.583944 110,908 6/20/2018
3.1.0.561732-pre4 5,147 6/11/2018
3.1.0.550168-pre3 2,369 6/6/2018
3.1.0.530888-pre2 1,332 6/4/2018
3.1.0.469394-pre1 10,154 5/9/2018
3.0.0.561731 122,922 6/11/2018
3.0.0.550146 22,949 6/6/2018
3.0.0.530893 17,036 6/4/2018
3.0.0.482510 178,618 5/14/2018
3.0.0.446417 98,864 5/1/2018
3.0.0.427558-pre4 7,738 4/25/2018
3.0.0.354232-pre3 12,332 4/5/2018
3.0.0.296286-pre2 7,481 3/20/2018
2.5.1.527436 58,482 5/4/2018
2.5.1.444934 131,205 4/4/2018
2.5.1.392594-pre3 3,708 3/21/2018
2.5.1.340284-pre2 5,372 3/9/2018
2.5.1.317207-pre1 5,159 3/1/2018
2.5.0.280555 276,032 2/16/2018
2.5.0.122203 278,967 12/18/2017
2.5.0.121934 177,150 11/28/2017
2.5.0.91635 118,776 11/16/2017
2.5.0.77107 25,921 11/13/2017
2.5.0.75255-pre3 4,915 11/10/2017
2.5.0.19271-pre2 8,373 10/20/2017
2.4.0.91020 39,269 11/16/2017
2.4.0.74863 32,420 11/10/2017
2.4.0.38779 56,237 10/30/2017
2.4.0.18342 51,638 10/20/2017
2.4.0.282 149,481 9/29/2017
2.4.0.280 163,268 9/27/2017
2.4.0.275-pre3 7,557 9/19/2017
2.4.0.269-pre2 12,876 8/29/2017
2.4.0.266-pre1 17,633 8/16/2017
2.3.5.256-pre6 32,473 6/29/2017
2.3.5.255-pre5 4,417 6/26/2017
2.3.5.239-pre3 26,714 5/11/2017
2.3.5.235-pre2 10,700 4/26/2017
2.3.5.233-pre1 8,525 4/13/2017
2.3.4.270 123,186 8/29/2017
2.3.4.267 60,916 8/16/2017
2.3.4.247 370,217 5/16/2017
2.3.4.231 196,644 4/12/2017
2.3.4.224 235,895 3/29/2017
2.3.4.221-pre6 6,877 3/27/2017
2.3.4.214-pre5 9,726 3/14/2017
2.3.4.212-pre4 5,771 3/10/2017
2.3.4.211-pre3 3,607 3/9/2017
2.3.4.192-pre2 18,589 2/3/2017
2.3.4.184-pre1 11,822 1/13/2017
2.3.3.193 226,626 2/1/2017
2.3.3.180 201,364 1/5/2017
2.3.3.175 114,960 12/6/2016
2.3.3.168 63,894 11/23/2016
2.3.3.166-pre4 7,234 11/3/2016
2.3.3.163-pre3 6,064 10/17/2016
2.3.3.152-pre2 15,027 9/15/2016
2.3.2.127 257,053 9/14/2016
2.3.2.118-pre1 6,512 8/3/2016
2.3.1.114 151,926 8/3/2016
2.3.1.113-pre3 3,526 7/19/2016
2.3.1.111-pre2 4,490 7/4/2016
2.3.1.110-pre1 2,164 6/29/2016
2.3.0.107 193,518 6/29/2016
2.3.0.49 81,689 6/16/2016
2.3.0.46-pre3 15,263 5/30/2016
2.3.0.38-pre2 12,526 4/27/2016
2.3.0.34-pre1 8,251 4/27/2016
2.2.0.45 114,678 5/30/2016
2.2.0.31 124,660 4/27/2016
2.2.0.23-pre4 2,821 4/20/2016
2.2.0.18-pre3 2,017 4/20/2016
2.2.0.5-pre2 15,670 4/8/2016
2.2.0.4-pre1 18,203 4/5/2016
2.1.0.6529 95,118 3/13/2016
2.1.0.6526 16,795 3/9/2016
2.1.0.6524 29,746 3/2/2016
2.1.0.6521 11,350 3/1/2016
2.1.0.6517-pre5 1,711 2/18/2016
2.1.0.6513-pre4 1,698 2/9/2016
2.1.0.6508-pre3 1,999 1/28/2016
2.1.0.6503-pre2 6,592 1/22/2016
2.1.0.6501-pre1 1,130 1/21/2016
2.1.0.6500-pre1 982 1/20/2016
2.0.1.6505 90,805 1/28/2016
2.0.1.6495 73,585 1/20/2016
2.0.1.6492-pre1 3,414 12/3/2015
2.0.0.6490 94,279 12/1/2015
2.0.0.6484 17,271 11/21/2015
2.0.0.6482 230,777 11/17/2015
1.5.2.6478-pre3 837 11/17/2015
1.5.2.6477-pre2 3,411 11/10/2015
1.5.2.6469-pre1 1,760 10/20/2015
1.5.1.6471 74,183 10/20/2015
1.5.1.6468 3,440 10/20/2015
1.5.1.6460-pre2 1,216 10/13/2015
1.5.1.6455-pre1 2,528 10/2/2015
1.5.0.6447 50,471 9/25/2015
1.5.0.6446 20,787 9/16/2015
1.5.0.6404-pre3 2,890 8/25/2015
1.5.0.6401-pre2 1,035 8/21/2015
1.5.0.6396-pre1 1,559 8/5/2015
1.4.4.6449 2,272 9/25/2015
1.4.4.6443 1,244 9/16/2015
1.4.4.6392 74,408 7/29/2015
1.4.4.6391 1,618 7/28/2015
1.4.4.6387 2,517 7/27/2015
1.4.4.6379-pre3 1,113 7/20/2015
1.4.4.6378-pre2 949 7/16/2015
1.4.4.6377-pre1 932 7/14/2015
1.4.3.6376 39,775 7/9/2015
1.4.3.6374 15,990 7/1/2015
1.4.3.6372 1,667 6/30/2015
1.4.3.6364-pre3 1,895 6/16/2015
1.4.3.6358-pre2 5,323 4/24/2015
1.4.3.6356-pre1 996 4/21/2015
1.4.2.6359 58,807 4/30/2015
1.4.2.6355 13,647 4/21/2015
1.4.2.6353-pre2 2,086 3/31/2015
1.4.2.6350-pre1 1,177 3/30/2015
1.4.1.6349 43,491 3/30/2015
1.4.1.6347-pre2 2,854 3/19/2015
1.4.1.6342-pre1 1,272 3/10/2015
1.4.0.6341 27,959 3/9/2015
1.4.0.6340-pre2 2,062 3/6/2015
1.4.0.6336-pre1 1,150 3/3/2015
1.3.5.6337 4,703 3/5/2015
1.3.5.6335 22,703 3/2/2015
1.3.5.6333-pre1 1,541 2/17/2015
1.3.4.6332 17,649 2/17/2015
1.3.4.6331-pre4 1,085 2/13/2015
1.3.4.6329-pre3 877 2/12/2015
1.3.4.6328-pre2 897 2/11/2015
1.3.4.6325-pre1 877 2/9/2015
1.3.3.6323 50,920 2/9/2015
1.3.3.6322-pre3 831 2/6/2015
1.3.3.6321-pre2 1,006 2/4/2015
1.3.3.6318-pre1 966 2/2/2015
1.3.2.6316 7,181 2/3/2015
1.3.2.6313-pre3 938 1/30/2015
1.3.2.6309-pre2 992 1/28/2015
1.3.2.6299-pre1 1,707 1/20/2015
1.3.1.6296 53,126 1/4/2015
1.3.1.6294-pre1 3,986 12/24/2014
1.3.0.6292 9,032 12/24/2014
1.3.0.6286-pre4 1,762 12/19/2014
1.3.0.6284-pre3 1,271 12/12/2014
1.3.0.6280-pre2 1,182 12/9/2014
1.3.0.6275-pre1 7,450 11/12/2014
1.2.3.6257 37,565 10/2/2014
1.2.3.6256-pre4 1,887 9/26/2014
1.2.3.6255-pre3 2,273 9/20/2014
1.2.3.6249-pre2 1,466 9/9/2014
1.2.3.6246-pre1 3,980 8/15/2014
1.2.2.6243 27,713 7/30/2014
1.2.2.6241-pre3 2,402 7/28/2014
1.2.2.6240-pre2 4,232 7/22/2014
1.2.2.6238-pre1 3,338 7/17/2014
1.2.1.6229 7,964 7/14/2014
1.1.1.6206 13,808 6/19/2014
1.1.0.6201 12,801 6/12/2014
1.0.6197 3,788 6/4/2014
1.0.6188 11,177 5/28/2014
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