add Android version

Pixiview.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.

Pixiview.Android/Resources/layout/Tabbar.xml

@@ -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" />

Pixiview.Android/Resources/layout/Toolbar.xml

@@ -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" />

Pixiview.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/icon_background"/>
+    <foreground android:drawable="@mipmap/icon_foreground"/>
+</adaptive-icon>

Pixiview.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/icon_background"/>
+    <foreground android:drawable="@mipmap/icon_foreground"/>
+</adaptive-icon>

Pixiview.Android/Resources/values/colors.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="icon_background">#1999F7</color>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

Pixiview.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 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>
+        <!-- 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>