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There is a newer version of this package available.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
<PackageReference Include="Xamarin.Forms" Version="2.3.1.110-pre1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
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]

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Version History

Version Downloads Last updated
4.3.0.819712-pre2 125 9/19/2019
4.3.0.778476-pre1 2,906 9/11/2019
4.2.0.815419 1,005 9/19/2019
4.2.0.778463 21,127 9/11/2019
4.2.0.709249 64,848 8/21/2019
4.2.0.673161-pre3 6,105 8/7/2019
4.2.0.618605-pre2 7,134 7/24/2019
4.2.0.608146-pre1 3,363 7/16/2019
4.1.0.778454 1,182 9/11/2019
4.1.0.709244 8,611 8/21/2019
4.1.0.673156 60,394 8/7/2019
4.1.0.618606 63,317 7/24/2019
4.1.0.581479 77,758 7/9/2019
4.1.0.555618 127,481 6/28/2019
4.1.0.496342-pre2 6,694 6/13/2019
4.1.0.483098-pre1 4,586 6/5/2019
4.0.0.709238 852 8/21/2019
4.0.0.618610 1,688 7/24/2019
4.0.0.540366 28,453 6/27/2019
4.0.0.497661 60,261 6/13/2019
4.0.0.482894 47,042 6/3/2019
4.0.0.425677 167,305 5/14/2019
4.0.0.394984-pre10 9,282 5/3/2019
4.0.0.346134-pre9 15,157 4/18/2019
4.0.0.304370-pre8 10,351 4/3/2019
4.0.0.250467-pre7 7,459 3/20/2019
4.0.0.232914-pre6 7,688 3/14/2019
4.0.0.169046-pre5 5,923 2/21/2019
4.0.0.135214-pre4 4,676 2/6/2019
4.0.0.94569-pre3 4,281 1/24/2019
4.0.0.62955-pre2 13,301 1/10/2019
4.0.0.8055-pre1 13,672 12/4/2018
3.6.0.709228 2,530 8/21/2019
3.6.0.539721 19,022 6/27/2019
3.6.0.344457 151,263 4/18/2019
3.6.0.293080 91,934 4/3/2019
3.6.0.264807 158,555 3/19/2019
3.6.0.220655 102,565 3/6/2019
3.6.0.169048-pre2 535 2/21/2019
3.6.0.135200-pre1 4,781 2/6/2019
3.5.0.274416 14,839 3/26/2019
3.5.0.169047 88,597 2/20/2019
3.5.0.129452 126,138 2/6/2019
3.5.0.94564-pre3 1,115 1/24/2019
3.5.0.62956-pre2 1,030 1/10/2019
3.4.0.1039999 11,568 3/26/2019
3.4.0.1029999 89,083 1/24/2019
3.4.0.1009999 104,837 1/4/2019
3.4.0.1008975 445,302 11/15/2018
3.4.0.987044-pre2 2,346 11/8/2018
3.4.0.925479-pre1 10,846 10/18/2018
3.3.0.967583 166,565 11/1/2018
3.3.0.912540 119,924 10/18/2018
3.3.0.893527-pre3 7,727 10/11/2018
3.3.0.871608-pre2 11,991 10/1/2018
3.3.0.840541-pre1 6,070 9/20/2018
3.2.0.871581 113,287 10/3/2018
3.2.0.839982 158,483 9/17/2018
3.2.0.809874-pre3 3,785 9/10/2018
3.2.0.729530-pre2 12,793 8/14/2018
3.2.0.637442-pre1 10,547 7/17/2018
3.1.0.697729 350,938 8/1/2018
3.1.0.637273 106,524 7/11/2018
3.1.0.583944 145,749 6/20/2018
3.1.0.561732-pre4 6,341 6/11/2018
3.1.0.550168-pre3 3,095 6/6/2018
3.1.0.530888-pre2 1,918 6/4/2018
3.1.0.469394-pre1 11,430 5/9/2018
3.0.0.561731 145,924 6/11/2018
3.0.0.550146 27,893 6/6/2018
3.0.0.530893 21,432 6/4/2018
3.0.0.482510 247,873 5/14/2018
3.0.0.446417 134,949 5/1/2018
3.0.0.427558-pre4 9,253 4/25/2018
3.0.0.354232-pre3 14,193 4/5/2018
3.0.0.296286-pre2 8,391 3/20/2018
2.5.1.527436 92,351 5/4/2018
2.5.1.444934 170,290 4/4/2018
2.5.1.392594-pre3 4,286 3/21/2018
2.5.1.340284-pre2 6,468 3/9/2018
2.5.1.317207-pre1 5,784 3/1/2018
2.5.0.280555 325,226 2/16/2018
2.5.0.122203 335,926 12/18/2017
2.5.0.121934 218,559 11/28/2017
2.5.0.91635 161,064 11/16/2017
2.5.0.77107 30,510 11/13/2017
2.5.0.75255-pre3 5,549 11/10/2017
2.5.0.19271-pre2 9,528 10/20/2017
2.4.0.91020 49,514 11/16/2017
2.4.0.74863 35,105 11/10/2017
2.4.0.38779 61,833 10/30/2017
2.4.0.18342 56,034 10/20/2017
2.4.0.282 163,962 9/29/2017
2.4.0.280 203,787 9/27/2017
2.4.0.275-pre3 8,228 9/19/2017
2.4.0.269-pre2 13,831 8/29/2017
2.4.0.266-pre1 19,847 8/16/2017
2.3.5.256-pre6 36,090 6/29/2017
2.3.5.255-pre5 5,035 6/26/2017
2.3.5.239-pre3 28,250 5/11/2017
2.3.5.235-pre2 11,419 4/26/2017
2.3.5.233-pre1 9,287 4/13/2017
2.3.4.270 148,699 8/29/2017
2.3.4.267 68,228 8/16/2017
2.3.4.247 421,899 5/16/2017
2.3.4.231 211,565 4/12/2017
2.3.4.224 251,009 3/29/2017
2.3.4.221-pre6 7,559 3/27/2017
2.3.4.214-pre5 10,450 3/14/2017
2.3.4.212-pre4 6,390 3/10/2017
2.3.4.211-pre3 4,212 3/9/2017
2.3.4.192-pre2 19,578 2/3/2017
2.3.4.184-pre1 13,110 1/13/2017
2.3.3.193 247,610 2/1/2017
2.3.3.180 211,524 1/5/2017
2.3.3.175 118,578 12/6/2016
2.3.3.168 67,013 11/23/2016
2.3.3.166-pre4 8,181 11/3/2016
2.3.3.163-pre3 6,523 10/17/2016
2.3.3.152-pre2 16,217 9/15/2016
2.3.2.127 287,458 9/14/2016
2.3.2.118-pre1 6,947 8/3/2016
2.3.1.114 156,623 8/3/2016
2.3.1.113-pre3 3,950 7/19/2016
2.3.1.111-pre2 4,886 7/4/2016
2.3.1.110-pre1 2,598 6/29/2016
2.3.0.107 207,539 6/29/2016
2.3.0.49 88,582 6/16/2016
2.3.0.46-pre3 16,275 5/30/2016
2.3.0.38-pre2 13,333 4/27/2016
2.3.0.34-pre1 8,916 4/27/2016
2.2.0.45 137,707 5/30/2016
2.2.0.31 128,320 4/27/2016
2.2.0.23-pre4 3,230 4/20/2016
2.2.0.18-pre3 2,442 4/20/2016
2.2.0.5-pre2 16,136 4/8/2016
2.2.0.4-pre1 18,646 4/5/2016
2.1.0.6529 98,884 3/13/2016
2.1.0.6526 17,723 3/9/2016
2.1.0.6524 36,762 3/2/2016
2.1.0.6521 12,261 3/1/2016
2.1.0.6517-pre5 2,318 2/18/2016
2.1.0.6513-pre4 2,299 2/9/2016
2.1.0.6508-pre3 2,614 1/28/2016
2.1.0.6503-pre2 7,204 1/22/2016
2.1.0.6501-pre1 1,759 1/21/2016
2.1.0.6500-pre1 1,584 1/20/2016
2.0.1.6505 93,642 1/28/2016
2.0.1.6495 75,357 1/20/2016
2.0.1.6492-pre1 4,041 12/3/2015
2.0.0.6490 98,132 12/1/2015
2.0.0.6484 17,998 11/21/2015
2.0.0.6482 241,748 11/17/2015
1.5.2.6478-pre3 1,462 11/17/2015
1.5.2.6477-pre2 4,098 11/10/2015
1.5.2.6469-pre1 2,383 10/20/2015
1.5.1.6471 77,140 10/20/2015
1.5.1.6468 4,105 10/20/2015
1.5.1.6460-pre2 1,852 10/13/2015
1.5.1.6455-pre1 3,211 10/2/2015
1.5.0.6447 55,813 9/25/2015
1.5.0.6446 21,925 9/16/2015
1.5.0.6404-pre3 3,502 8/25/2015
1.5.0.6401-pre2 1,704 8/21/2015
1.5.0.6396-pre1 2,145 8/5/2015
1.4.4.6449 2,946 9/25/2015
1.4.4.6443 1,845 9/16/2015
1.4.4.6392 77,524 7/29/2015
1.4.4.6391 2,199 7/28/2015
1.4.4.6387 3,137 7/27/2015
1.4.4.6379-pre3 1,725 7/20/2015
1.4.4.6378-pre2 1,549 7/16/2015
1.4.4.6377-pre1 1,551 7/14/2015
1.4.3.6376 42,905 7/9/2015
1.4.3.6374 16,842 7/1/2015
1.4.3.6372 2,276 6/30/2015
1.4.3.6364-pre3 2,526 6/16/2015
1.4.3.6358-pre2 5,965 4/24/2015
1.4.3.6356-pre1 1,635 4/21/2015
1.4.2.6359 63,119 4/30/2015
1.4.2.6355 14,629 4/21/2015
1.4.2.6353-pre2 2,687 3/31/2015
1.4.2.6350-pre1 1,744 3/30/2015
1.4.1.6349 44,776 3/30/2015
1.4.1.6347-pre2 3,425 3/19/2015
1.4.1.6342-pre1 1,879 3/10/2015
1.4.0.6341 29,205 3/9/2015
1.4.0.6340-pre2 2,725 3/6/2015
1.4.0.6336-pre1 1,711 3/3/2015
1.3.5.6337 5,308 3/5/2015
1.3.5.6335 25,493 3/2/2015
1.3.5.6333-pre1 2,288 2/17/2015
1.3.4.6332 19,459 2/17/2015
1.3.4.6331-pre4 1,743 2/13/2015
1.3.4.6329-pre3 1,468 2/12/2015
1.3.4.6328-pre2 1,476 2/11/2015
1.3.4.6325-pre1 1,443 2/9/2015
1.3.3.6323 53,409 2/9/2015
1.3.3.6322-pre3 1,437 2/6/2015
1.3.3.6321-pre2 1,600 2/4/2015
1.3.3.6318-pre1 1,600 2/2/2015
1.3.2.6316 7,947 2/3/2015
1.3.2.6313-pre3 1,584 1/30/2015
1.3.2.6309-pre2 1,629 1/28/2015
1.3.2.6299-pre1 2,343 1/20/2015
1.3.1.6296 57,210 1/4/2015
1.3.1.6294-pre1 4,664 12/24/2014
1.3.0.6292 9,816 12/24/2014
1.3.0.6286-pre4 2,345 12/19/2014
1.3.0.6284-pre3 1,846 12/12/2014
1.3.0.6280-pre2 1,794 12/9/2014
1.3.0.6275-pre1 8,073 11/12/2014
1.2.3.6257 39,406 10/2/2014
1.2.3.6256-pre4 2,481 9/26/2014
1.2.3.6255-pre3 2,891 9/20/2014
1.2.3.6249-pre2 2,068 9/9/2014
1.2.3.6246-pre1 4,636 8/15/2014
1.2.2.6243 28,980 7/30/2014
1.2.2.6241-pre3 2,995 7/28/2014
1.2.2.6240-pre2 4,835 7/22/2014
1.2.2.6238-pre1 3,996 7/17/2014
1.2.1.6229 8,797 7/14/2014
1.1.1.6206 14,451 6/19/2014
1.1.0.6201 13,845 6/12/2014
1.0.6197 4,421 6/4/2014
1.0.6188 12,003 5/28/2014
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