altosdroid: Start adding an AltosLink subclass for android

Will talks over bluetooth while providing an AltosLink APi

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 191 insertions, 0 deletions

diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/AltosBluetooth.java b/altosdroid/src/org/altusmetrum/AltosDroid/AltosBluetooth.java
new file mode 100644
index 00000000..45438a6c
--- /dev/null
+++ b/altosdroid/src/org/altusmetrum/AltosDroid/AltosBluetooth.java
@@ -0,0 +1,191 @@
+/*
+ * Copyright © 2011 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.AltosDroid;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.Method;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothSocket;
+import android.content.Context;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.util.Log;
+
+import org.altusmetrum.AltosLib.*;
+
+public class AltosBluetooth extends AltosLink {
+
+	// Debugging
+	private static final String TAG = "AltosBluetooth";
+	private static final boolean D = true;
+
+	/**
+	 * This thread runs while attempting to make an outgoing connection
+	 * with a device. It runs straight through; the connection either
+	 * succeeds or fails.
+	 */
+
+	private BluetoothAdapter	adapter;
+	private ConnectThread		connect_thread;
+	private BluetoothSocket		socket;
+	private InputStream		input;
+	private OutputStream		output;
+
+	private class ConnectThread extends Thread {
+		private final BluetoothDevice mmDevice;
+		private String mSocketType;
+		BluetoothSocket tmp_socket;
+
+		public ConnectThread(BluetoothDevice device, boolean secure) {
+			mmDevice = device;
+			mSocketType = secure ? "Secure" : "Insecure";
+
+			// Get a BluetoothSocket for a connection with the
+			// given BluetoothDevice
+			try {
+				if (secure) {
+					Method m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
+					tmp_socket = (BluetoothSocket) m.invoke(device, 2);
+					// tmp = device.createRfcommSocket(2);
+				} else {
+					Method m = device.getClass().getMethod("createInsecureRfcommSocket", new Class[] {int.class});
+					tmp_socket = (BluetoothSocket) m.invoke(device, 2);
+					// tmp = device.createInsecureRfcommSocket(2);
+				}
+			} catch (Exception e) {
+				Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e);
+				e.printStackTrace();
+			}
+		}
+
+		public void run() {
+			Log.i(TAG, "BEGIN connect_thread SocketType:" + mSocketType);
+			setName("ConnectThread" + mSocketType);
+
+			// Always cancel discovery because it will slow down a connection
+			adapter.cancelDiscovery();
+
+			// Make a connection to the BluetoothSocket
+			try {
+				// This is a blocking call and will only return on a
+				// successful connection or an exception
+				tmp_socket.connect();
+			} catch (IOException e) {
+				// Close the socket
+				try {
+					tmp_socket.close();
+				} catch (IOException e2) {
+					Log.e(TAG, "unable to close() " + mSocketType +
+					      " socket during connection failure", e2);
+				}
+				connection_failed();
+				return;
+			}
+
+			try {
+				synchronized (AltosBluetooth.this) {
+					input = tmp_socket.getInputStream();
+					output = tmp_socket.getOutputStream();
+					socket = tmp_socket;
+					// Reset the ConnectThread because we're done
+					AltosBluetooth.this.notify();
+					connect_thread = null;
+				}
+			} catch (Exception e) {
+				Log.e(TAG, "Failed to finish connection", e);
+				e.printStackTrace();
+			}
+		}
+
+		public void cancel() {
+			try {
+				if (tmp_socket != null)
+					tmp_socket.close();
+			} catch (IOException e) {
+				Log.e(TAG, "close() of connect " + mSocketType + " socket failed", e);
+			}
+		}
+	}
+
+	private synchronized void wait_connected() throws InterruptedException {
+		if (input == null) {
+			wait();
+		}
+	}
+
+	private void connection_failed() {
+	}
+	
+	public void print(String data) {
+		byte[] bytes = data.getBytes();
+		try {
+			wait_connected();
+			output.write(bytes);
+		} catch (IOException e) {
+			connection_failed();
+		} catch (InterruptedException e) {
+			connection_failed();
+		}
+	}
+
+	public int getchar() {
+		try {
+			wait_connected();
+			return input.read();
+		} catch (IOException e) {
+			connection_failed();
+		} catch (java.lang.InterruptedException e) {
+			connection_failed();
+		}
+		return AltosLink.ERROR;
+	}
+			
+	public void close() {
+		synchronized(this) {
+			if (connect_thread != null) {
+				connect_thread.cancel();
+				connect_thread = null;
+			}
+		}
+	}
+
+	public void flush_output() {
+		super.flush_output();
+		/* any local work needed to flush bluetooth? */
+	}
+
+	public boolean can_cancel_reply() {
+		return false;
+	}
+	public boolean show_reply_timeout() {
+		return true;
+	}
+		
+	public void hide_reply_timeout() {
+	}
+
+	public AltosBluetooth(BluetoothDevice device) {
+		adapter = BluetoothAdapter.getDefaultAdapter();
+		connect_thread = new ConnectThread(device, true);
+		connect_thread.start();
+	}
+}
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