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>

diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/AltosBluetooth.java b/altosdroid/src/org/altusmetrum/AltosDroid/AltosBluetooth.java
new file mode 100644 (file)
index 0000000..45438a6
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+++ 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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