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   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  * Copyright © 2012 Mike Beattie <mike@ethernal.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 package org.altusmetrum.AltosDroid;
  20
  21 import java.io.IOException;
  22 import java.io.InputStream;
  23 import java.io.OutputStream;
  24 import java.util.UUID;
  25
  26 import android.bluetooth.BluetoothAdapter;
  27 import android.bluetooth.BluetoothDevice;
  28 import android.bluetooth.BluetoothSocket;
  29 import android.util.Log;
  30
  31 import org.altusmetrum.AltosLib.*;
  32
  33 public class AltosBluetooth extends AltosLink {
  34
  35         // Debugging
  36         private static final String TAG = "AltosBluetooth";
  37         private static final boolean D = true;
  38
  39         private ConnectThread    connect_thread = null;
  40
  41         private BluetoothAdapter adapter;
  42         private BluetoothDevice  device;
  43         private BluetoothSocket  socket;
  44         private InputStream      input;
  45         private OutputStream     output;
  46
  47         private class ConnectThread extends Thread {
  48                 private final UUID SPP_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
  49
  50                 public ConnectThread(BluetoothDevice device) {
  51                         BluetoothSocket tmp_socket = null;
  52
  53                         try {
  54                                 tmp_socket = device.createInsecureRfcommSocketToServiceRecord(SPP_UUID);
  55                         } catch (IOException e) {
  56                                 e.printStackTrace();
  57                         }
  58                         socket = tmp_socket;
  59                 }
  60
  61                 public void run() {
  62                         if (D) Log.i(TAG, "BEGIN ConnectThread");
  63                         setName("ConnectThread");
  64
  65                         // Always cancel discovery because it will slow down a connection
  66                         adapter.cancelDiscovery();
  67
  68                         // Make a connection to the BluetoothSocket
  69                         try {
  70                                 // This is a blocking call and will only return on a
  71                                 // successful connection or an exception
  72                                 socket.connect();
  73                         } catch (IOException e) {
  74                                 // Close the socket
  75                                 try {
  76                                         socket.close();
  77                                 } catch (IOException e2) {
  78                                         if (D) Log.e(TAG, "unable to close() socket during connection failure", e2);
  79                                 }
  80                                 connection_failed();
  81                                 return;
  82                         }
  83
  84                         try {
  85                                 synchronized (AltosBluetooth.this) {
  86                                         input = socket.getInputStream();
  87                                         output = socket.getOutputStream();
  88
  89                                         // Reset the ConnectThread because we're done
  90                                         AltosBluetooth.this.notify();
  91                                         connect_thread = null;
  92                                         if (D) Log.i(TAG, "Completed connect");
  93                                 }
  94                         } catch (Exception e) {
  95                                 if (D) Log.e(TAG, "Failed to finish connection", e);
  96                                 e.printStackTrace();
  97                         }
  98                 }
  99
 100                 public void cancel() {
 101                         try {
 102                                 if (socket != null)
 103                                         socket.close();
 104                         } catch (IOException e) {
 105                                 if (D) Log.e(TAG, "close() of connect socket failed", e);
 106                         }
 107                 }
 108         }
 109
 110         private synchronized void wait_connected() throws InterruptedException {
 111                 if (input == null) {
 112                         wait();
 113                 }
 114         }
 115
 116         private void connection_failed() {
 117         }
 118
 119         public void print(String data) {
 120                 byte[] bytes = data.getBytes();
 121                 try {
 122                         wait_connected();
 123                         output.write(bytes);
 124                 } catch (IOException e) {
 125                         connection_failed();
 126                 } catch (InterruptedException e) {
 127                         connection_failed();
 128                 }
 129         }
 130
 131         public int getchar() {
 132                 try {
 133                         wait_connected();
 134                         return input.read();
 135                 } catch (IOException e) {
 136                         connection_failed();
 137                 } catch (java.lang.InterruptedException e) {
 138                         connection_failed();
 139                 }
 140                 return AltosLink.ERROR;
 141         }
 142
 143         public void close() {
 144                 synchronized(this) {
 145                         if (connect_thread != null) {
 146                                 connect_thread.cancel();
 147                                 connect_thread = null;
 148                         }
 149                 }
 150         }
 151
 152
 153         //public void flush_output() { super.flush_output(); }
 154
 155         public boolean can_cancel_reply()   { return false; }
 156         public boolean show_reply_timeout() { return true; }
 157         public void hide_reply_timeout()    { }
 158
 159         public AltosBluetooth(BluetoothDevice device) {
 160                 adapter = BluetoothAdapter.getDefaultAdapter();
 161                 connect_thread = new ConnectThread(device, true);
 162                 connect_thread.start();
 163         }
 164 }