ReactiveProperty.XamarinAndroid 8.0.0-pre202110240626

This is a prerelease version of ReactiveProperty.XamarinAndroid.
There is a newer version of this package available.
See the version list below for details.
dotnet add package ReactiveProperty.XamarinAndroid --version 8.0.0-pre202110240626
NuGet\Install-Package ReactiveProperty.XamarinAndroid -Version 8.0.0-pre202110240626
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="ReactiveProperty.XamarinAndroid" Version="8.0.0-pre202110240626" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ReactiveProperty.XamarinAndroid --version 8.0.0-pre202110240626
#r "nuget: ReactiveProperty.XamarinAndroid, 8.0.0-pre202110240626"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install ReactiveProperty.XamarinAndroid as a Cake Addin
#addin nuget:?package=ReactiveProperty.XamarinAndroid&version=8.0.0-pre202110240626&prerelease

// Install ReactiveProperty.XamarinAndroid as a Cake Tool
#tool nuget:?package=ReactiveProperty.XamarinAndroid&version=8.0.0-pre202110240626&prerelease

Japanese

ReactiveProperty

ReactiveProperty provides MVVM and asynchronous support features under Reactive Extensions. Target framework is .NET 6.0(on v8.0.0-pre), .NET Core 3.1, .NET Framework 4.6.1 and .NET Standard 2.0.

alternate text is missing from this package README image alternate text is missing from this package README image Build and Release

ReactiveProperty overview

ReactiveProperty is a very powerful and simple library.

Delay and Select

This sample app's ViewModel code is as below:

public class MainPageViewModel
{
    public ReactiveProperty<string> Input { get; }
    public ReadOnlyReactiveProperty<string> Output { get; }
    public MainPageViewModel()
    {
        Input = new ReactiveProperty<string>("");
        Output = Input
            .Delay(TimeSpan.FromSeconds(1))
            .Select(x => x.ToUpper())
            .ToReadOnlyReactiveProperty();
    }
}

It's LINQ and Rx magic.

All steps are written in the "Getting Started" section in the ReactiveProperty documentation.

This library's concept is "Fun programing". ViewModel code using ReactiveProperties is very simple.

ViewModel's popular implementation:

public class AViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private string _name;
    public string Name
    {
        get => _name;
        set
        {
            _name = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Name)));

            // Update a command status
            DoSomethingCommand.RaiseCanExecuteChanged();
        }
    }

    private string _memo;
    public string Memo
    {
        get => _memo;
        set
        {
            _memo = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Memo)));

            // Update a command status
            DoSomethingCommand.RaiseCanExecuteChanged();
        }
    }

    // DelegateCommand is plane ICommand implementation.
    public DelegateCommand DoSomethingCommand { get; }

    public AViewModel()
    {
        DoSomethingCommand = new DelegateCommand(
            () => { ... },
            () => !string.IsNullOrEmpty(Name) && !string.IsNullOrEmpty(Memo)
        );
    }
}

Binding code:

<TextBlock Text="{Binding Name}">
<TextBlock Text="{Binding Memo}">

ViewModel's implementation using ReactiveProperty:

public class AViewModel
{
    public ReactiveProperty<string> Name { get; }
    public ReactiveProperty<string> Memo { get; }
    public ReactiveCommand DoSomethingCommand { get; }

    public AViewModel()
    {
        Name = new ReactiveProperty<string>()
            .SetValidateNotifyError(x => string.IsNullOrEmpty(x) ? "Invalid value" : null);
        Memo = new ReactiveProperty<string>()
            .SetValidateNotifyError(x => string.IsNullOrEmpty(x) ? "Invalid value" : null);
        DoSomethingCommand = new[]
            {
                Name.ObserveHasErrors,
                Memo.ObserveHasErrors,
            }
            .CombineLatestValuesAreAllFalse()
            .ToReactiveCommand()
            .WithSubscribe(() => { ... });
    }
}

Binding code:

<TextBlock Text="{Binding Name.Value}">
<TextBlock Text="{Binding Memo.Value}">

It's very simple.

ReactiveProperty doesn't provide base class by ViewModel, which means that ReactiveProperty can be used together with another MVVM library like Prism, MVVMLight, etc...

Documentation

ReactiveProperty documentation

NuGet packages

Package Id Version and downloads Description
ReactiveProperty alternate text is missing from this package README imagealternate text is missing from this package README image The package includes all core features, and the target platform is .NET Standard 2.0. It fits almost all situations.
ReactiveProperty.Core alternate text is missing from this package README imagealternate text is missing from this package README image The package includes minimum classes such as ReactivePropertySlim<T> and ReadOnlyReactivePropertySlim<T>. And this doesn't have any dependency even System.Reactive. If you don't need Rx features, then it fits.
ReactiveProperty.WPF alternate text is missing from this package README imagealternate text is missing from this package README image The package includes EventToReactiveProperty and EventToReactiveCommand for WPF. This is for .NET Core 3.0 or later and .NET Framework 4.6.1 or later.
ReactiveProperty.UWP alternate text is missing from this package README imagealternate text is missing from this package README image The package includes EventToReactiveProperty and EventToReactiveCommand for UWP.
ReactiveProperty.XamarinAndroid alternate text is missing from this package README imagealternate text is missing from this package README image The package includes many extension methods to create IObservable from events for Xamarin.Android native.
ReactiveProperty.XamariniOS alternate text is missing from this package README imagealternate text is missing from this package README image The package includes many extension methods to bind ReactiveProperty and ReactiveCommand to Xamarin.iOS native controls.

Support

I'm not watching StackOverflow and other forums to support ReactiveProperty, so please feel free to post questions at Github issues. I'm available Japanese(1st language) and English(2nd language).

If too many questions are posted, then I plan to separate posting place about feature requests, issues, questions.

Author info

Yoshifumi Kawai a.k.a. @neuecc is Founder/CEO/CTO of Cysharp, Inc in Tokyo, Japan. Awarded Microsoft MVP for Developer Technologies since April, 2011. He is an original owner of ReactiveProperty.

Takaaki Suzuki a.k.a. @xin9le software developer in Fukui, Japan. Awarded Microsoft MVP for Developer Technologies since July, 2012.

Kazuki Ota a.k.a. @okazuki software developer in Tokyo, Japan. Awarded Microsoft MVP for Windows Development since July 2011 to Feb 2017. Now, working at Microsoft Japan.

Product Compatible and additional computed target framework versions.
.NET net6.0-android31.0 is compatible.  net7.0-android was computed.  net8.0-android was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
9.5.0 75 2/28/2024
9.4.1 77 2/12/2024
9.4.0 97 2/11/2024
9.4.0-pre8 122 12/21/2023
9.4.0-pre7 78 12/21/2023
9.4.0-pre6 65 12/21/2023
9.4.0-pre5 71 12/21/2023
9.4.0-pre4 78 12/21/2023
9.3.4 226 10/30/2023
9.3.4-pre202310290551 106 10/29/2023
9.3.3 131 10/10/2023
9.3.2 128 9/25/2023
9.3.2-pre202309140728 108 9/14/2023
9.3.1 161 8/11/2023
9.3.0 155 7/31/2023
9.3.0-pre202307291429 140 7/29/2023
9.2.0 167 6/19/2023
9.2.0-pre202305241301 95 5/25/2023
9.1.2 246 3/12/2023
9.0.0 281 2/12/2023
9.0.0-pre202302040959 136 2/4/2023
9.0.0-pre202301080724 134 1/8/2023
9.0.0-pre202301050852 116 1/5/2023
8.2.0 374 11/10/2022
8.1.2 598 6/6/2022
8.1.2-pre202206051057 164 6/5/2022
8.1.1 463 5/27/2022
8.1.0 464 4/30/2022
8.1.0-pre202204290912 165 4/29/2022
8.1.0-pre202204290644 151 4/29/2022
8.0.5 488 3/24/2022
8.0.5-pre202203191529 171 3/19/2022
8.0.5-pre202203191312 155 3/19/2022
8.0.4 472 3/5/2022
8.0.4-pre202203040658 161 3/4/2022
8.0.3 385 12/5/2021
8.0.3-pre202112031043 866 12/3/2021
8.0.3-pre202112030833 836 12/3/2021
8.0.2 933 11/21/2021
8.0.1 536 11/20/2021
8.0.1-pre202111200140 561 11/20/2021
8.0.0 386 11/9/2021
8.0.0-pre202111090825 216 11/9/2021
8.0.0-pre202110240626 250 10/24/2021
8.0.0-pre202110161410 285 10/16/2021
8.0.0-pre202110160852 210 10/16/2021
8.0.0-pre202110160831 214 10/16/2021
8.0.0-pre202110131323 221 10/13/2021
8.0.0-pre202110071401 247 10/7/2021
8.0.0-pre202110060758 268 10/6/2021
8.0.0-pre202110060735 212 10/6/2021
8.0.0-pre202109190434 307 9/19/2021
8.0.0-pre202109160117 248 9/16/2021
8.0.0-pre202108141424 266 8/14/2021
8.0.0-pre202107040319 253 7/4/2021
7.12.0 1,902 8/6/2021
7.11.0 499 5/31/2021
7.10.0 442 4/29/2021
7.9.0 455 4/20/2021
7.8.3 496 3/24/2021
7.8.2 437 3/23/2021
7.8.1 477 3/11/2021
7.8.1-pre202103031133 273 3/3/2021
7.8.0 461 2/21/2021
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7.8.0-pre202102201703 250 2/20/2021
7.7.1 424 2/19/2021
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7.7.0 450 1/26/2021
7.6.1 466 1/15/2021
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7.5.1 613 10/19/2020
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7.5.0-pre202010141113 332 10/14/2020
7.4.1 557 9/23/2020
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7.3.0 537 9/17/2020
7.2.1 511 9/11/2020
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7.1.0 606 5/26/2020
7.1.0-pre202005251107 387 5/25/2020
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7.0.0 594 5/5/2020
7.0.0-ci20200503102823 404 5/3/2020
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