add Andriod, fix BLE, UI to suit both

Batman2.Android/Assets/AboutAssets.txt

@@ -0,0 +1,19 @@
+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");

Batman2.Android/Assets/DemoInit.csv

@@ -0,0 +1,44 @@
+"Battery", "DT", "WH", "W", "A", "V"
+"DemoBatt1",09/08/2021 21:30:31,277.62055,-2.31933,-0.081,28.666
+"DemoBatt1",09/08/2021 23:38:27,274.96475,-2.30407,-0.079,28.626
+"DemoBatt1",10/08/2021 13:22:14,274.87302,-2.2583,-0.078,28.623
+"DemoBatt1",10/08/2021 13:27:18,274.93789,-0.33569,-0.012,28.648
+"DemoBatt1",10/08/2021 13:34:05,274.96603,39.18457,1.353,28.952
+"DemoBatt1",10/08/2021 16:35:52,274.86589,-0.33569,-0.01,28.648
+"DemoBatt1",10/08/2021 19:47:34,205.83984,-0.35095,-0.012,27.772
+"DemoBatt1",11/08/2021 22:40:13,205.79606,-0.35095,-0.012,28.678
+"DemoBatt1",12/08/2021 16:41:28,205.73993,-2.24304,-0.081,27.801
+"DemoBatt1",12/08/2021 20:15:56,140.37507,-0.32043,-0.012,26.709
+"DemoBatt1",13/08/2021 09:41:16,140.43003,54.55017,2.005,27.207
+"DemoBatt1",13/08/2021 09:48:21,146.92484,55.19103,2.014,27.393
+"DemoBatt1",13/08/2021 13:49:53,294.95215,-2.42614,-0.083,29.103
+"DemoBatt1",13/08/2021 14:51:48,294.3134,-2.27355,-0.078,29.043
+"DemoBatt1",13/08/2021 20:33:08,190.29992,-0.35095,-0.012,27.312
+"DemoBatt1",14/08/2021 21:01:42,142.93084,-2.16674,-0.081,26.602
+"DemoBatt1",14/08/2021 22:41:17,142.2737,-2.28881,-0.086,26.61
+"DemoBatt1",15/08/2021 13:54:25,140.86697,-79.8645,-2.581,26.042
+"DemoBatt1",15/08/2021 18:29:08,99,-2.182,-0.083,24.51
+"DemoBatt1",17/08/2021 13:11:37,5,0,0,0
+"DemoBatt1",17/08/2021 13:16:37,9.85768,52.24609,2.011,25.977
+"DemoBatt1",17/08/2021 15:20:32,123.79276,-0.35095,-0.012,27.811
+"DemoBatt1",17/08/2021 17:21:08,123.7742,-0.27465,-0.009,27.998
+"DemoBatt1",17/08/2021 17:26:08,128.50521,57.92236,2.023,28.618
+"DemoBatt1",17/08/2021 17:41:08,141.71135,-0.27465,-0.009,28.278
+"DemoBatt1",17/08/2021 19:08:33,141.69446,-0.39672,-0.015,28.222
+"DemoBatt1",17/08/2021 19:13:33,145.775,57.75451,2.006,28.791
+"DemoBatt1",17/08/2021 19:18:33,146.76955,-0.27465,-0.009,28.295
+"DemoBatt1",17/08/2021 20:20:02,146.75897,-0.28991,-0.009,28.263
+"DemoBatt1",17/08/2021 20:25:02,150.41582,52.01721,1.806,28.798
+"DemoBatt1",17/08/2021 22:33:32,204.09158,-0.30517,-0.009,29.128
+"DemoBatt1",17/08/2021 23:38:30,204.0691,-2.34985,-0.081,29.068
+"DemoBatt1",17/08/2021 23:48:35,199.64622,-2.24304,-0.077,29.047
+"DemoBatt1",18/08/2021 11:45:38,199.43106,-2.2583,-0.077,29.001
+"DemoBatt1",18/08/2021 21:24:31,123.41898,-2.19726,-0.078,27.871
+"DemoBatt1",19/08/2021 00:04:10,122.75263,-2.19726,-0.078,27.854
+"DemoBatt1",19/08/2021 19:37:36,61.58707,-2.09045,-0.078,26.777
+"DemoBatt1",19/08/2021 19:42:36,65.15132,54.82482,2.001,27.387
+"DemoBatt1",19/08/2021 23:56:52,208.60938,-2.22778,-0.076,29.083
+"DemoBatt1",19/08/2021 23:57:41,200,0,0,0
+"DemoBatt1",20/08/2021 00:02:42,199.8158,-2.21252,-0.076,29.069
+"DemoBatt1",20/08/2021 00:07:42,199.63146,-2.21252,-0.076,29.059
+"DemoBatt1",20/08/2021 00:12:42,199.47888,-0.30517,-0.009,29.067

Batman2.Android/Batman2.Android.csproj

@@ -0,0 +1,130 @@
+<?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>{E6ECEBEB-46B5-4816-9DC2-07FF64A58379}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{c9e5eea5-ca05-42a1-839b-61506e0a37df}</TemplateGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>Batman2.Droid</RootNamespace>
+    <AssemblyName>Batman2.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>v13.0</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>
+    <EmbedAssembliesIntoApk>false</EmbedAssembliesIntoApk>
+    <AotAssemblies>false</AotAssemblies>
+    <EnableLLVM>false</EnableLLVM>
+    <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
+    <BundleAssemblies>false</BundleAssemblies>
+    <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>
+    <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Essentials" Version="1.7.0" />
+    <PackageReference Include="Plugin.BLE">
+      <Version>2.1.2</Version>
+    </PackageReference>
+    <PackageReference Include="sqlite-net-pcl">
+      <Version>1.7.335</Version>
+    </PackageReference>
+    <PackageReference Include="Plugin.DeviceOrientation">
+      <Version>1.0.7</Version>
+    </PackageReference>
+    <PackageReference Include="Accord.Statistics">
+      <Version>3.8.0</Version>
+    </PackageReference>
+    <PackageReference Include="Microcharts.Forms-Fdab">
+      <Version>0.9.5.40</Version>
+    </PackageReference>
+    <PackageReference Include="SkiaSharp.Views.Forms">
+      <Version>2.80.3</Version>
+    </PackageReference>
+    <PackageReference Include="Xamarin.Forms">
+      <Version>5.0.0.2291</Version>
+    </PackageReference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainActivity.cs" />
+    <Compile Include="Permissions.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" />
+    <AndroidAsset Include="Assets\DemoInit.csv" />
+  </ItemGroup>
+  <ItemGroup>
+    <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 />
+  <ItemGroup>
+    <ProjectReference Include="..\Batman2\Batman2.csproj">
+      <Project>{f1a63a8a-8e4d-4e76-aba9-d5cd45b4bb21}</Project>
+      <Name>Batman2</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-hdpi\Logo.png" />
+    <AndroidResource Include="Resources\drawable-mdpi\Logo.png" />
+    <AndroidResource Include="Resources\drawable-xhdpi\Logo.png" />
+    <AndroidResource Include="Resources\drawable-xxhdpi\Logo.png" />
+    <AndroidResource Include="Resources\drawable-xxxhdpi\Logo.png" />
+    <AndroidResource Include="Resources\drawable\Logo.png" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+</Project>

Batman2.Android/MainActivity.cs

@@ -0,0 +1,34 @@
+using System;
+
+using Android.App;
+using Android.Content.PM;
+using Android.Runtime;
+using Android.OS;
+using static Android.Provider.SyncStateContract;
+using Xamarin.Forms;
+using Java.Security;
+
+namespace Batman2.Droid
+{
+    [Activity(Label = "Batman2", Icon = "@drawable/Logo", 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 async void OnCreate(Bundle savedInstanceState)
+        {
+            base.OnCreate(savedInstanceState);
+
+            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
+            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
+            AndroidPermissions permissions = new AndroidPermissions();
+            await permissions.CheckAndRequestBluetoothPermissions();
+
+            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);
+        }
+    }
+}

Batman2.Android/Permissions.cs

@@ -0,0 +1,48 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Xamarin.Essentials;
+using Xamarin.Forms;
+
+namespace Batman2.Droid {
+    public class AndroidPermissions
+    {
+        public async Task<PermissionStatus> CheckAndRequestBluetoothPermissions()
+        {
+            PermissionStatus status;
+            if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.S)
+            {
+                status = await Permissions.CheckStatusAsync<BluetoothSPermission>();
+
+                if (status == PermissionStatus.Granted)
+                    return status;
+
+                status = await Permissions.RequestAsync<BluetoothSPermission>();
+            }
+            else
+            {
+                status = await Permissions.CheckStatusAsync<Permissions.LocationWhenInUse>();
+
+                if (status == PermissionStatus.Granted)
+                    return status;
+
+
+                if (Permissions.ShouldShowRationale<Permissions.LocationWhenInUse>())
+                {
+                    await Application.Current.MainPage.DisplayAlert("Permission required", "Location permission is required for bluetooth scanning. We do not store or use your location at all.", "OK");
+                }
+
+                status = await Permissions.RequestAsync<Permissions.LocationWhenInUse>();
+            }
+            return status;
+        }
+    }
+
+    public class BluetoothSPermission : Xamarin.Essentials.Permissions.BasePlatformPermission
+    {
+        public override (string androidPermission, bool isRuntime)[] RequiredPermissions => new List<(string androidPermission, bool isRuntime)>
+        {
+            (Android.Manifest.Permission.BluetoothScan, true),
+            (Android.Manifest.Permission.BluetoothConnect, true)
+        }.ToArray();
+    }
+}

Batman2.Android/Properties/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<?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.kmleung.Batman3">
+    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="33" />
+    <application android:label="Batman2.Android" android:theme="@style/MainTheme"></application>
+	<uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" />
+	<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+	<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+</manifest>

Batman2.Android/Properties/AssemblyInfo.cs

@@ -0,0 +1,30 @@
+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("Batman2.Android")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Batman2.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)]

Batman2.Android/Resources/AboutResources.txt

@@ -0,0 +1,50 @@
+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.