Download data from the Internet and parse it.

Added textviewes that showed information about source.

ListenRadio/ListenRadio.csproj

@@ -43,6 +43,10 @@
   <ItemGroup>
     <Reference Include="Mono.Android" />
     <Reference Include="mscorlib" />
+    <Reference Include="Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\packages\Newtonsoft.Json.8.0.3\lib\portable-net40+sl5+wp80+win8+wpa81\Newtonsoft.Json.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Xml.Linq" />
@@ -52,10 +56,12 @@
     <Compile Include="MainActivity.cs" />
     <Compile Include="Resources\Resource.Designer.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="StreamInfo.cs" />
     <Compile Include="StreamService.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="GettingStarted.Xamarin" />
+    <None Include="packages.config" />
     <None Include="Resources\AboutResources.txt" />
     <None Include="Assets\AboutAssets.txt" />
   </ItemGroup>

ListenRadio/MainActivity.cs

@@ -5,13 +5,24 @@
 using Android.Views;
 using Android.Widget;
 using Android.OS;
+using System.Net;
+using Android.Util;
+using System.Threading;
+using Newtonsoft.Json.Linq;
+using System.Threading.Tasks;
 
 namespace ListenRadio
 {
-    [Activity(Label = "ListenRadio", MainLauncher = true, Icon = "@drawable/icon")]
+    [Activity(Label = "ListenRadio", MainLauncher = true, Icon = "@drawable/icon", ConfigurationChanges = Android.Content.PM.ConfigChanges.KeyboardHidden | Android.Content.PM.ConfigChanges.Keyboard | Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
     public class MainActivity : Activity
     {
-        int count = 1;
+        /// <summary>
+        /// Used for get info from Source ancestor value, if with 0 will be null, then icrease them.
+        /// </summary>
+        private int _sourcepath = 0;
+
+        private TextView titleTextView;
+        private TextView infoTextView;
 
         protected override void OnCreate(Bundle bundle)
         {
@@ -20,22 +31,76 @@ protected override void OnCreate(Bundle bundle)
             // Set our view from the "main" layout resource
             SetContentView(Resource.Layout.Main);
 
-            // Get our button from the layout resource,
-            // and attach an event to it
             Button playButton = FindViewById<Button>(Resource.Id.PlayButton);
             Button stopButton = FindViewById<Button>(Resource.Id.StopButton);
             Button pauseButton = FindViewById<Button>(Resource.Id.StopButton);
 
             playButton.Click += delegate { SendAudioCommand(StreamService.ActionPlay); };
-            stopButton.Click += delegate { SendAudioCommand(StreamService.ActionStop);  };
+            stopButton.Click += delegate { SendAudioCommand(StreamService.ActionStop); };
+
+            titleTextView = FindViewById<TextView>(Resource.Id.TitleTextView);
+            infoTextView = FindViewById<TextView>(Resource.Id.InfoTextView);
+            MakeRequest();
+            //TODO: make service delete this!!
+            System.Timers.Timer t = new System.Timers.Timer();
+            t.Interval = 5000;
+            t.Elapsed += new System.Timers.ElapsedEventHandler(UpdateSourceData);
+            t.Start();
+
         }
 
         private void SendAudioCommand(string action)
         {
             var intent = new Intent(action);
+            intent.PutExtra("id", Resource.String.RadioUrl);
             StartService(intent);
         }
 
+        //Get request from server
+        protected void UpdateSourceData(object sender, System.Timers.ElapsedEventArgs e)
+        {
+            MakeRequest();
+            //To decrease threads. Should work.
+            Task.Delay(10000).Wait();
+        }
+
+        public void MakeRequest()
+        {
+            WebClient client = new WebClient();
+            string downloadedString = client.DownloadString(@"http://stream.sunlife-fm.org:8000/status-json.xsl");
+            var jsonObject = JObject.Parse(downloadedString);
+            var sourcedata = jsonObject.Root.SelectToken($"icestats.source[{_sourcepath}]");
+
+            //Check if first source data is empty, then its not work. Then mean it should get data from second source ancestor
+            if (sourcedata.SelectToken("title") == null && _sourcepath == 0)
+            {
+                _sourcepath = 1;
+                downloadedString = client.DownloadString(@"http://stream.sunlife-fm.org:8000/status-json.xsl");
+                jsonObject = JObject.Parse(downloadedString);
+                sourcedata = jsonObject.Root.SelectToken($"icestats.source[{_sourcepath}]");
+            }
+            RunOnUiThread(() => {
+                if (_sourcepath == 0)
+                    FillFirstTypeInfo(sourcedata.SelectToken("bitrate").ToString(), sourcedata.SelectToken("channels").ToString(), sourcedata.SelectToken("samplerate").ToString());
+                else
+                    FillSecondTypeInfo(sourcedata.SelectToken("audio_info").ToString());
+                titleTextView.SetText(sourcedata.SelectToken("title").ToString(), TextView.BufferType.Spannable);
+            });
+            Log.Debug("userdata", sourcedata.ToString());
+        }
+
+        public void FillFirstTypeInfo(string bitrate, string channels, string samplerate)
+        {
+            string info = $"bitrate={bitrate} channels={channels} samplerate={samplerate}";
+            infoTextView.SetText(info, TextView.BufferType.Spannable);
+        }
+
+        public void FillSecondTypeInfo(string audio_info)
+        {
+            string info = audio_info.ToString().Replace(';', ' ');
+            infoTextView.SetText(info, TextView.BufferType.Spannable);
+        } 
+
         protected override void OnDestroy()
         {
             var intent = new Intent(StreamService.ActionStop);

ListenRadio/Resources/layout/Main.axml

@@ -1,17 +1,39 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/linearLayout1">
+    <ImageView
+        android:src="@android:drawable/ic_menu_gallery"
+        android:layout_width="fill_parent"
+        android:layout_height="180dp"
+        android:scaleType="fitCenter"
+        android:id="@+id/LogoImageView" />
+    <TextView
+        android:text="Title"
+        android:textAppearance="?android:attr/textAppearanceLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/LogoImageView"
+        android:id="@+id/TitleTextView"
+        android:lines="1" />
+    <TextView
+        android:text="info"
+        android:textAppearance="?android:attr/textAppearanceSmall"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/TitleTextView"
+        android:id="@+id/InfoTextView" />
     <Button
         android:id="@+id/PlayButton"
+        android:layout_below="@id/InfoTextView"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="@string/Play" />
     <Button
         android:id="@+id/StopButton"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
-        android:text="@string/Stop" />
-</LinearLayout>
+        android:text="@string/Stop"
+        android:layout_below="@id/PlayButton" />
+</RelativeLayout>

ListenRadio/Resources/values/Strings.xml

@@ -4,4 +4,5 @@
   <string name="Stop">Stop radio</string>
   <string name="Pause">Pause radio</string>
   <string name="ApplicationName">ListenRadio</string>
+  <string name="RadioUrl">http://5.9.135.213:8000/play</string>
 </resources>

ListenRadio/StreamInfo.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using Android.App;
+using Android.Content;
+using Android.OS;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using System.Net;
+
+namespace ListenRadio
+{
+    class StreamInfo
+    {
+        /// <summary>
+        /// Used for get stream info
+        /// </summary>
+        private WebClient _client;
+
+        /// <summary>
+        /// Stream info if requset complete without errors
+        /// </summary>
+        private string _data;
+        public string GetData()
+        {
+            return _data;
+        }
+
+        /// <summary>
+        /// Used when server return error to user
+        /// </summary>
+        private string _errorString; 
+        public string GetError()
+        {
+            return _errorString;
+        }
+
+        public StreamInfo(string url)
+        {
+            _client = new WebClient();
+            _client.DownloadStringAsync(new Uri(url));
+            _client.DownloadStringCompleted += StreamDataGet;
+        }
+
+        private void StreamDataGet(object sender, DownloadStringCompletedEventArgs e)
+        {
+            if (e.Error == null)
+                _data = e.Result;
+            else
+            {
+                _data = null;
+                _errorString = e.Error.Message;
+            }
+        }
+    }
+}

ListenRadio/StreamService.cs

@@ -23,7 +23,7 @@ class StreamService : Service, AudioManager.IOnAudioFocusChangeListener
         public const string ActionPause = "com.action.PAUSE";
         public const string ActionStop = "com.action.STOP";
 
-        private const string _radio = @"http://5.9.135.213:8000/play";
+        private string _radio;
 
         private MediaPlayer player;
         private AudioManager audioManager;
@@ -38,6 +38,7 @@ public override void OnCreate()
             base.OnCreate();
             audioManager = (AudioManager)GetSystemService(AudioService);
             wifiManager = (WifiManager)GetSystemService(WifiService);
+            _radio = GetString(Resource.String.RadioUrl);
         }
 
         public override IBinder OnBind(Intent intent)
@@ -121,22 +122,28 @@ private async void Play()
 
         private void StartForeground()
         {
-
+            //Intent for showing notification
             var pendingIntent = PendingIntent.GetActivity(ApplicationContext, 0,
                             new Intent(ApplicationContext, typeof(MainActivity)),
                             PendingIntentFlags.UpdateCurrent);
 
-            var notification = new Notification
-            {
-                TickerText = new Java.Lang.String("Stream started!"),
-                Icon = Resource.Drawable.Icon
-            };
-            notification.Flags |= NotificationFlags.OngoingEvent;
-            notification.SetLatestEventInfo(ApplicationContext, "Listen Radio",
-                            "Music streaming", pendingIntent);
-            StartForeground(NotificationId, notification);
+            //Custom notification and build it
+            var builder = new Notification.Builder(this)
+            .SetContentText("Radio is playing")
+            .SetContentTitle("Listen Radio")
+            .SetContentIntent(pendingIntent)
+            .SetSmallIcon(Resource.Drawable.Icon)
+            .SetOngoing(true);
+            Notification notification = builder.Build();
+
+            //Init notification manager and show notification
+            NotificationManager notificationManager =
+                GetSystemService(Context.NotificationService) as NotificationManager;
+            notificationManager.Notify(NotificationId, notification);
+
         }
 
+        //Pause, can use it if you want
         private void Pause()
         {
             if (player == null)
@@ -149,6 +156,7 @@ private void Pause()
             paused = true;
         }
 
+        //Stop
         private void Stop()
         {
             if (player == null)
@@ -163,7 +171,7 @@ private void Stop()
             ReleaseWifiLock();
         }
 
-
+        //Wifi lockers, when device go to sleep still play streaming
         private void AquireWifiLock()
         {
             if (wifiLock == null)
@@ -193,6 +201,10 @@ public override void OnDestroy()
         }
 
 
+        /// <summary>
+        /// Focus change, when user change application
+        /// </summary>
+        /// <param name="focusChange">Check app audio focus</param>
         public void OnAudioFocusChange(AudioFocus focusChange)
         {
             switch (focusChange)

ListenRadio/packages.config

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Newtonsoft.Json" version="8.0.3" targetFramework="monoandroid60" />
+</packages>