添加xamarinFormApp例子,安卓,iOS,WPF

Examples/xamarinFormApp/xamarinFormApp.Android/Assets/AboutAssets.txt

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+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with your package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+    protected override void OnCreate (Bundle bundle)
+    {
+        base.OnCreate (bundle);
+
+        InputStream input = Assets.Open ("my_asset.txt");
+    }
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");

Examples/xamarinFormApp/xamarinFormApp.Android/MainActivity.cs

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+using System;
+
+using Android.App;
+using Android.Content.PM;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using Android.OS;
+
+namespace xamarinFormApp.Droid
+{
+    [Activity(Label = "xamarinFormApp", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize )]
+    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
+    {
+        protected override void OnCreate(Bundle savedInstanceState)
+        {
+            TabLayoutResource = Resource.Layout.Tabbar;
+            ToolbarResource = Resource.Layout.Toolbar;
+
+            base.OnCreate(savedInstanceState);
+
+            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
+            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
+            LoadApplication(new App());
+        }
+        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
+        {
+            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+
+            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
+        }
+    }
+}

Examples/xamarinFormApp/xamarinFormApp.Android/Properties/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.xamarinformapp" android:installLocation="auto">
+	<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
+	<application android:label="xamarinFormApp.Android" android:theme="@style/MainTheme"></application>
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+</manifest>

Examples/xamarinFormApp/xamarinFormApp.Android/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("xamarinFormApp.Android")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("xamarinFormApp.Android")]
+[assembly: AssemblyCopyright("Copyright ©  2014")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+// Add some common permissions, these can be removed if not needed
+[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/AboutResources.txt

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+Images, layout descriptions, binary blobs and string dictionaries can be included 
+in your application as resource files.  Various Android APIs are designed to 
+operate on the resource IDs instead of dealing with images, strings or binary blobs 
+directly.
+
+For example, a sample Android app that contains a user interface layout (main.xml),
+an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png) 
+would keep its resources in the "Resources" directory of the application:
+
+Resources/
+    drawable-hdpi/
+        icon.png
+
+    drawable-ldpi/
+        icon.png
+
+    drawable-mdpi/
+        icon.png
+
+    layout/
+        main.xml
+
+    values/
+        strings.xml
+
+In order to get the build system to recognize Android resources, set the build action to
+"AndroidResource".  The native Android APIs do not operate directly with filenames, but 
+instead operate on resource IDs.  When you compile an Android application that uses resources, 
+the build system will package the resources for distribution and generate a class called
+"Resource" that contains the tokens for each one of the resources included. For example, 
+for the above Resources layout, this is what the Resource class would expose:
+
+public class Resource {
+    public class drawable {
+        public const int icon = 0x123;
+    }
+
+    public class layout {
+        public const int main = 0x456;
+    }
+
+    public class strings {
+        public const int first_string = 0xabc;
+        public const int second_string = 0xbcd;
+    }
+}
+
+You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main 
+to reference the layout/main.xml file, or Resource.strings.first_string to reference the first 
+string in the dictionary file values/strings.xml.

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/layout/Tabbar.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/sliding_tabs"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    app:tabIndicatorColor="@android:color/white"
+    app:tabGravity="fill"
+    app:tabMode="fixed" />

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/layout/Toolbar.xml

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+<android.support.v7.widget.Toolbar
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/toolbar"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/colorPrimary"
+    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+    android:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
+

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/mipmap-anydpi-v26/icon.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/launcher_background" />
+    <foreground android:drawable="@mipmap/launcher_foreground" />
+</adaptive-icon>

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/mipmap-anydpi-v26/icon_round.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/launcher_background" />
+    <foreground android:drawable="@mipmap/launcher_foreground" />
+</adaptive-icon>

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="launcher_background">#FFFFFF</color>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

Examples/xamarinFormApp/xamarinFormApp.Android/Resources/values/styles.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<resources>
+
+  <style name="MainTheme" parent="MainTheme.Base">
+    <!-- As of Xamarin.Forms 4.6 the theme has moved into the Forms binary -->
+    <!-- If you want to override anything you can do that here. -->
+    <!-- Underneath are a couple of entries to get you started. -->
+
+    <!-- Set theme colors from https://aka.ms/material-colors -->
+    <!-- colorPrimary is used for the default action bar background -->
+    <!--<item name="colorPrimary">#2196F3</item>-->
+    <!-- colorPrimaryDark is used for the status bar -->
+    <!--<item name="colorPrimaryDark">#1976D2</item>-->
+    <!-- colorAccent is used as the default value for colorControlActivated
+         which is used to tint widgets -->
+    <!--<item name="colorAccent">#FF4081</item>-->
+  </style>
+</resources>

Examples/xamarinFormApp/xamarinFormApp.Android/xamarinFormApp.Android.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{0BFC3652-7CD1-49E4-BA9A-70E5EC818FCE}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{6968b3a4-1835-46a3-ac5c-1ae33b475983}</TemplateGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>xamarinFormApp.Droid</RootNamespace>
+    <AssemblyName>xamarinFormApp.Android</AssemblyName>
+    <Deterministic>True</Deterministic>
+    <AndroidApplication>True</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
+    <AndroidResgenClass>Resource</AndroidResgenClass>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+    <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
+    <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
+    <AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
+    <TargetFrameworkVersion>v9.0</TargetFrameworkVersion>
+    <AndroidEnableSGenConcurrent>true</AndroidEnableSGenConcurrent>
+    <AndroidUseAapt2>true</AndroidUseAapt2>
+    <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidLinkMode>None</AndroidLinkMode>
+    <AotAssemblies>false</AotAssemblies>
+    <EnableLLVM>false</EnableLLVM>
+    <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
+    <BundleAssemblies>false</BundleAssemblies>
+    <MandroidI18n>CJK;West</MandroidI18n>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidManagedSymbols>true</AndroidManagedSymbols>
+    <AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
+    <AotAssemblies>false</AotAssemblies>
+    <EnableLLVM>false</EnableLLVM>
+    <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
+    <BundleAssemblies>false</BundleAssemblies>
+    <MandroidI18n>CJK;West</MandroidI18n>
+    <AndroidSupportedAbis>armeabi-v7a;x86;x86_64;arm64-v8a</AndroidSupportedAbis>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="4.8.0.1687" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.5.3.2" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainActivity.cs" />
+    <Compile Include="Resources\Resource.designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\AboutResources.txt" />
+    <None Include="Assets\AboutAssets.txt" />
+    <None Include="Properties\AndroidManifest.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\layout\Tabbar.xml" />
+    <AndroidResource Include="Resources\layout\Toolbar.xml" />
+    <AndroidResource Include="Resources\values\styles.xml" />
+    <AndroidResource Include="Resources\values\colors.xml" />
+    <AndroidResource Include="Resources\mipmap-anydpi-v26\icon.xml" />
+    <AndroidResource Include="Resources\mipmap-anydpi-v26\icon_round.xml" />
+    <AndroidResource Include="Resources\mipmap-hdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-hdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-mdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-mdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xxhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xxhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\mipmap-xxxhdpi\icon.png" />
+    <AndroidResource Include="Resources\mipmap-xxxhdpi\launcher_foreground.png" />
+    <AndroidResource Include="Resources\drawable\xamarin_logo.png" />
+    <AndroidResource Include="Resources\drawable\icon_about.png" />
+    <AndroidResource Include="Resources\drawable\icon_feed.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\xamarinFormApp\xamarinFormApp.csproj">
+      <Project>{19768622-95F4-4D1B-AAF4-090274F22EB5}</Project>
+      <Name>xamarinFormApp</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+  <ProjectExtensions>
+    <VisualStudio>
+      <UserProperties TriggeredFromHotReload="False" />
+    </VisualStudio>
+  </ProjectExtensions>
+</Project>