Added Android Bluetooth Device

src/NmeaParser/BluetoothDevice.Android.cs

@@ -0,0 +1,101 @@
+//
+// Copyright (c) 2014 Morten Nielsen
+//
+// Licensed under the Microsoft Public License (Ms-PL) (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://opensource.org/licenses/Ms-PL.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#if __ANDROID__
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.IO;
+using System.Threading.Tasks;
+using Android.Bluetooth;
+
+namespace NmeaParser
+{
+	/// <summary>
+	/// A Bluetooth NMEA device
+	/// </summary>
+	public class BluetoothDevice : NmeaDevice
+	{
+        private static Java.Util.UUID SERIAL_UUID = Java.Util.UUID.FromString("00001101-0000-1000-8000-00805F9B34FB");
+        private Android.Bluetooth.BluetoothDevice m_device;
+        private BluetoothSocket m_socket;
+
+        /// <summary>
+        /// Gets a list of bluetooth devices that supports serial communication
+        /// </summary>
+        /// <returns></returns>
+        public static IEnumerable<Android.Bluetooth.BluetoothDevice> GetBluetoothSerialDevices()
+        {
+            var adapter = Android.Bluetooth.BluetoothAdapter.DefaultAdapter;
+            if (adapter != null && adapter.IsEnabled)
+            {
+                foreach (var b in adapter.BondedDevices.Where(d => d.GetUuids().Where(t => t.Uuid.ToString().Equals("00001101-0000-1000-8000-00805F9B34FB", StringComparison.InvariantCultureIgnoreCase)).Any()))
+                    yield return b;
+            }
+        }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="BluetoothDevice"/> class.
+		/// </summary>
+		/// <param name="device">The Android Bluetooth Device.</param>
+		public BluetoothDevice(Android.Bluetooth.BluetoothDevice device)
+		{
+            m_device = device;
+		}
+        
+        /// <summary>
+        /// Creates the stream the NmeaDevice is working on top off.
+        /// </summary>
+        /// <returns></returns>
+        protected override Task<System.IO.Stream> OpenStreamAsync()
+        {
+            var adapter = Android.Bluetooth.BluetoothAdapter.DefaultAdapter;
+            if (adapter?.IsEnabled != true)
+                throw new InvalidOperationException("Bluetooth Adapter not enabled");
+            var d = adapter.GetRemoteDevice(m_device.Address);
+            var socket = d.CreateRfcommSocketToServiceRecord(SERIAL_UUID);
+            socket.Connect();
+			m_socket = socket;
+            return Task.FromResult<Stream>(socket.InputStream);
+		}
+
+		/// <summary>
+		/// Closes the stream the NmeaDevice is working on top off.
+		/// </summary>
+		/// <param name="stream">The stream.</param>
+		/// <returns></returns>
+		protected override Task CloseStreamAsync(System.IO.Stream stream)
+		{
+			if (stream == null)
+				throw new ArgumentNullException("stream");
+			stream.Dispose();
+			m_socket.Dispose();
+			m_socket = null;
+			return Task.FromResult(true);
+		}
+
+        /// <inheritdoc />
+        public override bool CanWrite => true;
+
+        /// <inheritdoc />
+        public override Task WriteAsync(byte[] buffer, int offset, int length)
+        {
+            if (m_socket == null)
+                throw new InvalidOperationException("Device not open");
+            return m_socket.OutputStream.WriteAsync(buffer, offset, length);
+        }
+	}
+}
+#endif