Rewritten sample.

Weather/WeatherApp/WeatherApp.Android/Assets/AboutAssets.txt → Weather/Weather/WeatherApp.Android/Assets/AboutAssets.txt

@@ -6,12 +6,12 @@ AssetManager, like this:
 
 public class ReadAsset : Activity
 {
-	protected override void OnCreate (Bundle bundle)
-	{
-		base.OnCreate (bundle);
+    protected override void OnCreate (Bundle bundle)
+    {
+        base.OnCreate (bundle);
 
-		InputStream input = Assets.Open ("my_asset.txt");
-	}
+        InputStream input = Assets.Open ("my_asset.txt");
+    }
 }
 
 Additionally, some Android functions will automatically load asset files:

Weather/WeatherApp/WeatherApp.Android/MainActivity.cs → Weather/Weather/WeatherApp.Android/MainActivity.cs

@@ -9,19 +9,17 @@
 
 namespace WeatherApp.Droid
 {
-    [Activity(Label = "WeatherApp", Icon = "@drawable/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
+    [Activity(Label = "WeatherApp", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
     public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
     {
-        protected override void OnCreate(Bundle bundle)
+        protected override void OnCreate(Bundle savedInstanceState)
         {
             TabLayoutResource = Resource.Layout.Tabbar;
             ToolbarResource = Resource.Layout.Toolbar;
 
-            base.OnCreate(bundle);
-
-            global::Xamarin.Forms.Forms.Init(this, bundle);
+            base.OnCreate(savedInstanceState);
+            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
             LoadApplication(new App());
         }
     }
-}
-
+}

Weather/WeatherApp/WeatherApp.Android/Properties/AndroidManifest.xml → Weather/Weather/WeatherApp.Android/Properties/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <?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.WeatherApp">
-	<uses-sdk android:minSdkVersion="15" />
-	<application android:label="WeatherApp.Android"></application>
-</manifest>
+    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="27" />
+    <application android:label="WeatherApp.Android">
+    </application>
+</manifest>

Weather/Weather/WeatherApp.Android/Resources/layout/Tabbar.axml

@@ -0,0 +1,2 @@
+<?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" />

Weather/Weather/WeatherApp.Android/Resources/layout/Toolbar.axml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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" />

Weather/Weather/WeatherApp.Android/Resources/mipmap-anydpi-v26/icon.xml

@@ -0,0 +1,5 @@
+<?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>

Weather/Weather/WeatherApp.Android/Resources/mipmap-anydpi-v26/icon_round.xml

@@ -0,0 +1,5 @@
+<?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>

Weather/Weather/WeatherApp.Android/Resources/values/colors.xml

@@ -0,0 +1,7 @@
+<?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>

Weather/Weather/WeatherApp.Android/Resources/values/styles.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="MainTheme" parent="MainTheme.Base">
+    </style>
+    <!-- Base theme applied no matter what API -->
+    <style name="MainTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!--If you are using revision 22.1 please use just windowNoTitle. Without android:-->
+        <item name="windowNoTitle">true</item>
+        <!--We will be using the toolbar so no need to show ActionBar-->
+        <item name="windowActionBar">false</item>
+        <!-- Set theme colors from http://www.google.com/design/spec/style/color.html#color-color-palette -->
+        <!-- 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>
+        <!-- You can also set colorControlNormal, colorControlActivated
+         colorControlHighlight and colorSwitchThumbNormal. -->
+        <item name="windowActionModeOverlay">true</item>
+        <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
+    </style>
+    <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">
+        <item name="colorAccent">#FF4081</item>
+    </style>
+</resources>

Weather/WeatherApp/WeatherApp.Android/WeatherApp.Android.csproj → Weather/Weather/WeatherApp.Android/WeatherApp.Android.csproj

@@ -1,25 +1,29 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?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>{A236B0BB-8011-4645-B8A6-59B005B8AF50}</ProjectGuid>
+    <ProjectGuid>{8B869EF7-BE40-46D2-9413-F36344F063F4}</ProjectGuid>
     <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{c9e5eea5-ca05-42a1-839b-61506e0a37df}</TemplateGuid>
     <OutputType>Library</OutputType>
     <RootNamespace>WeatherApp.Droid</RootNamespace>
     <AssemblyName>WeatherApp.Android</AssemblyName>
-    <TargetFrameworkVersion>v8.1</TargetFrameworkVersion>
     <AndroidApplication>True</AndroidApplication>
     <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
     <AndroidResgenClass>Resource</AndroidResgenClass>
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
     <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
     <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
-    <NuGetPackageImportStamp></NuGetPackageImportStamp>
+    <AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
+    <TargetFrameworkVersion>v8.1</TargetFrameworkVersion>
+    <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
+    <DebugType>portable</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug</OutputPath>
     <DefineConstants>DEBUG;</DefineConstants>
@@ -60,28 +64,38 @@
   <ItemGroup>
     <None Include="Resources\AboutResources.txt" />
     <None Include="Assets\AboutAssets.txt" />
-  </ItemGroup>
-  <ItemGroup>
-    <AndroidResource Include="Resources\drawable\icon.png" />
-    <AndroidResource Include="Resources\drawable-hdpi\icon.png" />
-    <AndroidResource Include="Resources\drawable-xhdpi\icon.png" />
-    <AndroidResource Include="Resources\drawable-xxhdpi\icon.png" />
-  </ItemGroup>
-  <ItemGroup>
     <None Include="Properties\AndroidManifest.xml" />
   </ItemGroup>
   <ItemGroup>
     <AndroidResource Include="Resources\layout\Tabbar.axml" />
     <AndroidResource Include="Resources\layout\Toolbar.axml" />
-    <AndroidResource Include="Resources\values\styles.xml">
-      <SubType>Designer</SubType>
-    </AndroidResource>
+    <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" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Resources\drawable\" />
+    <Folder Include="Resources\drawable-hdpi\" />
+    <Folder Include="Resources\drawable-xhdpi\" />
+    <Folder Include="Resources\drawable-xxhdpi\" />
+    <Folder Include="Resources\drawable-xxxhdpi\" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\WeatherApp\WeatherApp.csproj">
-      <Project>{BFF15088-44BD-4A75-900A-D8C8FD968490}</Project>
+      <Project>{244E8B60-19FA-48DA-A3B4-3D9A4F611BDA}</Project>
       <Name>WeatherApp</Name>
     </ProjectReference>
   </ItemGroup>
-  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
-</Project>
+ <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+</Project>

Weather/Weather/WeatherApp.iOS/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,117 @@
+{
+  "images": [
+    {
+      "scale": "2x",
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "3x",
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon60.png"
+    },
+    {
+      "scale": "2x",
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon58.png"
+    },
+    {
+      "scale": "3x",
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon87.png"
+    },
+    {
+      "scale": "2x",
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon80.png"
+    },
+    {
+      "scale": "3x",
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon120.png"
+    },
+    {
+      "scale": "2x",
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon120.png"
+    },
+    {
+      "scale": "3x",
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon180.png"
+    },
+    {
+      "scale": "1x",
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon20.png"
+    },
+    {
+      "scale": "2x",
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "1x",
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon29.png"
+    },
+    {
+      "scale": "2x",
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon58.png"
+    },
+    {
+      "scale": "1x",
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "2x",
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon80.png"
+    },
+    {
+      "scale": "1x",
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon76.png"
+    },
+    {
+      "scale": "2x",
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon152.png"
+    },
+    {
+      "scale": "2x",
+      "size": "83.5x83.5",
+      "idiom": "ipad",
+      "filename": "Icon167.png"
+    },
+    {
+      "scale": "1x",
+      "size": "1024x1024",
+      "idiom": "ios-marketing",
+      "filename": "Icon1024.png"
+    }
+  ],
+  "properties": {},
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

Weather/Weather/WeatherApp.iOS/Info.plist

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>UIDeviceFamily</key>
+    <array>
+        <integer>1</integer>
+        <integer>2</integer>
+    </array>
+    <key>UISupportedInterfaceOrientations</key>
+    <array>
+        <string>UIInterfaceOrientationPortrait</string>
+        <string>UIInterfaceOrientationLandscapeLeft</string>
+        <string>UIInterfaceOrientationLandscapeRight</string>
+    </array>
+    <key>UISupportedInterfaceOrientations~ipad</key>
+    <array>
+        <string>UIInterfaceOrientationPortrait</string>
+        <string>UIInterfaceOrientationPortraitUpsideDown</string>
+        <string>UIInterfaceOrientationLandscapeLeft</string>
+        <string>UIInterfaceOrientationLandscapeRight</string>
+    </array>
+    <key>MinimumOSVersion</key>
+    <string>8.0</string>
+    <key>CFBundleDisplayName</key>
+    <string>WeatherApp</string>
+    <key>CFBundleIdentifier</key>
+    <string>com.companyname.WeatherApp</string>
+    <key>CFBundleVersion</key>
+    <string>1.0</string>
+    <key>UILaunchStoryboardName</key>
+    <string>LaunchScreen</string>
+    <key>CFBundleName</key>
+    <string>WeatherApp</string>
+    <key>XSAppIconAssets</key>
+    <string>Assets.xcassets/AppIcon.appiconset</string>
+</dict>
+</plist>