質問編集履歴
2
詳細の追加
test
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test
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FormsからDependencyServiceを使い、Android側でXamnarin.Androidライブラリを使うのであれば動くとは思うのですが、.NET Standard libraryから利用する、または、.NET Standard library内で完結するような作りというのは無理でしょうか。
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---
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## 追記 20190301
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* Xamarin.Fomrsプロジェクトを作成
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* Cross-Platform .NET Standard Plugin Templates を追加
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* Xamarin.Formsプロジェクトからライブラリプロジェクトを参照
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* Xamarin.Androidプロジェクトからライブラリプロジェクトを参照
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* Xamarin.iOSプロジェクトはアンロード
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* CrossTestPlugin.shared.csにてTestPluginImplementationをインスタンス化しようとした時にNotImplementedExceptionが吐かれる
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```
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CrossTestPlugin.shared.cs
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using System;
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using Plugin.TestPlugin;
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namespace Plugin.TestPlugin
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{
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/// <summary>
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/// Cross TestPlugin
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/// </summary>
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public static class CrossTestPlugin
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{
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static Lazy<ITestPlugin> implementation = new Lazy<ITestPlugin>(() => CreateTestPlugin(), System.Threading.LazyThreadSafetyMode.PublicationOnly);
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/// <summary>
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/// Gets if the plugin is supported on the current platform.
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/// </summary>
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public static bool IsSupported => implementation.Value == null ? false : true;
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/// <summary>
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/// Current plugin implementation to use
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/// </summary>
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public static ITestPlugin Current
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{
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get
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{
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ITestPlugin ret = implementation.Value;
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if (ret == null)
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{
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throw NotImplementedInReferenceAssembly();
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}
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return ret;
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}
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}
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static ITestPlugin CreateTestPlugin()
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{
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#if NETSTANDARD1_0 || NETSTANDARD2_0
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return null;
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#else
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#pragma warning disable IDE0022 // Use expression body for methods
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return new TestPluginImplementation(); // ここでNotImplementedException が出る
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#pragma warning restore IDE0022 // Use expression body for methods
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#endif
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}
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internal static Exception NotImplementedInReferenceAssembly() =>
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new NotImplementedException("This functionality is not implemented in the portable version of this assembly. You should reference the NuGet package from your main application project in order to reference the platform-specific implementation.");
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}
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}
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```
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```
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ITestPlugin.shared.cs
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Plugin.TestPlugin
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{
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public interface ITestPlugin
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{
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string GetVersionName();
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}
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}
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```
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```
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TestPlugin.android.cs
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using Android.Content;
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Plugin.TestPlugin
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{
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/// <summary>
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/// Interface for TestPlugin
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/// </summary>
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public class TestPluginImplementation : ITestPlugin
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{
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public string GetVersionName()
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{
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Context context = Android.App.Application.Context; //Android.App.Application.Context;
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var name = context.PackageManager.GetPackageInfo(context.PackageName, 0).VersionName;
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return name;
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}
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}
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}
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```
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```
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TestPlugin.apple.cs
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Plugin.TestPlugin
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{
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/// <summary>
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/// Interface for TestPlugin
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/// </summary>
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public class TestPluginImplementation : ITestPlugin
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{
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public string GetVersionName()
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{
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return "ios";
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}
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}
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}
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```
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@@ -52,4 +52,16 @@
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環境
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win10 VS2017
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Mac VS for Mac
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~~~~
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66
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|
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55
67
|
FormsからDependencyServiceを使い、Android側でXamnarin.Androidライブラリを使うのであれば動くとは思うのですが、.NET Standard libraryから利用する、または、.NET Standard library内で完結するような作りというのは無理でしょうか。
|