From 9d6aaccc0c11ef6a7ffbbb483d024121c7f352d2 Mon Sep 17 00:00:00 2001
From: Maurice <maurice.golverdingen@infosupport.com>
Date: Wed, 19 Jun 2024 16:16:38 +0200
Subject: [PATCH] Wake on lan demo added

---
 DemoAndroid/Activities/WakeOnLanActivity.cs   | 53 +++++++++++++++++++
 DemoAndroid/DemoAndroid.csproj                |  6 ++-
 DemoAndroid/MainActivity.cs                   | 12 +++--
 .../Resources/layout/activity_main.xml        |  8 +++
 .../Resources/layout/activity_wakeonlan.xml   | 19 +++++++
 5 files changed, 94 insertions(+), 4 deletions(-)
 create mode 100644 DemoAndroid/Activities/WakeOnLanActivity.cs
 create mode 100644 DemoAndroid/Resources/layout/activity_wakeonlan.xml

diff --git a/DemoAndroid/Activities/WakeOnLanActivity.cs b/DemoAndroid/Activities/WakeOnLanActivity.cs
new file mode 100644
index 0000000..f80b8f0
--- /dev/null
+++ b/DemoAndroid/Activities/WakeOnLanActivity.cs
@@ -0,0 +1,53 @@
+using System.Net;
+using System.Net.Sockets;
+
+namespace DemoAndroid;
+
+[Activity(Label = "WakeOnLanActivity")]
+public class WakeOnLanActivity : Activity
+{
+    protected override void OnCreate(Bundle? savedInstanceState)
+    {
+        base.OnCreate(savedInstanceState);
+
+        // Create your application here
+        SetContentView(Resource.Layout.activity_wakeonlan);
+
+        var button = FindViewById<Button>(Resource.Id.btnWakeOnLan);
+        button.Click += (sender, args) =>
+        {
+            WakePc();
+        };
+    }
+
+    private void WakePc()
+    {
+        byte[] macAddress = { 0x2c, 0x4d, 0x54, 0x4d, 0x10, 0x0f };
+        byte[] magicPacket = new byte[102];
+
+        // Fill first 6 bytes with 0xFF
+        for (int i = 0; i < 6; i++)
+        {
+            magicPacket[i] = 0xFF;
+        }
+
+        // Repeat MAC address 16 times
+        for (int i = 1; i <= 16; i++)
+        {
+            for (int j = 0; j < 6; j++)
+            {
+                magicPacket[i * 6 + j] = macAddress[j];
+            }
+        }
+
+        using var client = new UdpClient();
+        client.EnableBroadcast = true;
+        var endpoint = new IPEndPoint(IPAddress.Broadcast, 9); // 255.255.255.255 port 9
+
+        for (int i = 0; i < 5; i++)
+        {
+            // Try 5 times
+            client.Send(magicPacket, magicPacket.Length, endpoint);
+        }
+    }
+}
\ No newline at end of file
diff --git a/DemoAndroid/DemoAndroid.csproj b/DemoAndroid/DemoAndroid.csproj
index 4402573..5d9c2ae 100644
--- a/DemoAndroid/DemoAndroid.csproj
+++ b/DemoAndroid/DemoAndroid.csproj
@@ -10,9 +10,13 @@
         <ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
         
         <!-- With AOT, our app is crashing in Release mode -->
-        <AotAssemblies>False</AotAssemblies>
+        <RunAOTCompilation>False</RunAOTCompilation>
+        <PublishAot>False</PublishAot>
     </PropertyGroup>
     <ItemGroup>
       <PackageReference Include="QRCoder-ImageSharp" Version="0.10.0" />
     </ItemGroup>
+    <ItemGroup>
+      <Folder Include="Activities\" />
+    </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/DemoAndroid/MainActivity.cs b/DemoAndroid/MainActivity.cs
index a5874a2..4ab0178 100644
--- a/DemoAndroid/MainActivity.cs
+++ b/DemoAndroid/MainActivity.cs
@@ -1,6 +1,6 @@
+using Android.Content;
 using Android.Graphics;
-using QRCoder;
-using Exception = Java.Lang.Exception; // QRCoder-ImageSharp else it crashes
+using QRCoder; // QRCoder-ImageSharp else it crashes
 
 namespace DemoAndroid;
 
@@ -18,7 +18,7 @@ public class MainActivity : Activity
         SetContentView(Resource.Layout.activity_main);
 
         var etInput = FindViewById<EditText>(Resource.Id.etInput) ?? throw new Exception("EditText #etInput not found");
-        _ivQr = FindViewById<ImageView>(Resource.Id.ivQR) ?? throw new Exception("ImageView #ivQR not found");;
+        _ivQr = FindViewById<ImageView>(Resource.Id.ivQR) ?? throw new Exception("ImageView #ivQR not found");
 
         etInput.TextChanged += (sender, args) =>
         {
@@ -29,6 +29,12 @@ public class MainActivity : Activity
                 CreateQr();
             }
         };
+
+        var btnWol = FindViewById<Button>(Resource.Id.btnWolPage) ?? throw new Exception("Button #btnWol not found");
+        btnWol.Click += (_, _) =>
+        {
+            StartActivity(new Intent(this, typeof(WakeOnLanActivity)));
+        };
     }
 
     private void CreateQr()
diff --git a/DemoAndroid/Resources/layout/activity_main.xml b/DemoAndroid/Resources/layout/activity_main.xml
index 74a0293..c750428 100644
--- a/DemoAndroid/Resources/layout/activity_main.xml
+++ b/DemoAndroid/Resources/layout/activity_main.xml
@@ -12,4 +12,12 @@
     <ImageView android:id="@+id/ivQR"
             android:layout_width="match_parent" 
                android:layout_height="wrap_content" />
+    
+    <Button android:id="@+id/btnWolPage"
+            android:layout_width="match_parent" 
+            android:layout_height="wrap_content"
+            android:text="Go to wake on lan page"
+            android:background="@color/blue"
+            android:textColor="@color/white"
+            android:height="15pt"/>
 </LinearLayout>
\ No newline at end of file
diff --git a/DemoAndroid/Resources/layout/activity_wakeonlan.xml b/DemoAndroid/Resources/layout/activity_wakeonlan.xml
new file mode 100644
index 0000000..f2636d6
--- /dev/null
+++ b/DemoAndroid/Resources/layout/activity_wakeonlan.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent">
+
+    <TextView android:layout_width="match_parent"
+              android:layout_height="wrap_content"
+              android:text="Start PC by tapping button below" />
+
+    <Button android:id="@+id/btnWakeOnLan"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Start PC"
+            android:textColor="@color/white"
+            android:background="@color/blue"
+            android:height="15pt"
+            android:layout_margin="10pt"/>
+</LinearLayout>
\ No newline at end of file