git.gag.com Git - fw/altos/blob - altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java

   1 /*
   2  * Copyright © 2012 Mike Beattie <mike@ethernal.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.AltosDroid;
  19
  20 import java.lang.ref.WeakReference;
  21 import java.util.ArrayList;
  22 import java.util.concurrent.TimeoutException;
  23 import java.util.Timer;
  24 import java.util.TimerTask;
  25
  26 import android.app.Notification;
  27 //import android.app.NotificationManager;
  28 import android.app.PendingIntent;
  29 import android.app.Service;
  30 import android.bluetooth.BluetoothDevice;
  31 import android.bluetooth.BluetoothAdapter;
  32 import android.content.Intent;
  33 import android.content.Context;
  34 import android.os.Bundle;
  35 import android.os.IBinder;
  36 import android.os.Handler;
  37 import android.os.Message;
  38 import android.os.Messenger;
  39 import android.os.RemoteException;
  40 import android.os.Looper;
  41 import android.util.Log;
  42 import android.widget.Toast;
  43 import android.location.Location;
  44 import android.location.LocationManager;
  45 import android.location.LocationListener;
  46 import android.location.Criteria;
  47
  48 import org.altusmetrum.altoslib_6.*;
  49
  50
  51 public class TelemetryService extends Service implements LocationListener {
  52
  53         private static final String TAG = "TelemetryService";
  54         private static final boolean D = true;
  55
  56         static final int MSG_REGISTER_CLIENT   = 1;
  57         static final int MSG_UNREGISTER_CLIENT = 2;
  58         static final int MSG_CONNECT           = 3;
  59         static final int MSG_CONNECTED         = 4;
  60         static final int MSG_CONNECT_FAILED    = 5;
  61         static final int MSG_DISCONNECTED      = 6;
  62         static final int MSG_TELEMETRY         = 7;
  63         static final int MSG_SETFREQUENCY      = 8;
  64         static final int MSG_CRC_ERROR         = 9;
  65         static final int MSG_SETBAUD           = 10;
  66         static final int MSG_DISCONNECT        = 11;
  67
  68         // Unique Identification Number for the Notification.
  69         // We use it on Notification start, and to cancel it.
  70         private int NOTIFICATION = R.string.telemetry_service_label;
  71         //private NotificationManager mNM;
  72
  73         ArrayList<Messenger> clients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  74         final Handler   handler   = new IncomingHandler(this);
  75         final Messenger messenger = new Messenger(handler); // Target we publish for clients to send messages to IncomingHandler.
  76
  77         // Name of the connected device
  78         DeviceAddress address;
  79         private AltosBluetooth  altos_bluetooth  = null;
  80         private TelemetryReader telemetry_reader = null;
  81         private TelemetryLogger telemetry_logger = null;
  82
  83         // Local Bluetooth adapter
  84         private BluetoothAdapter bluetooth_adapter = null;
  85
  86         // Last data seen; send to UI when it starts
  87         private TelemetryState  telemetry_state;
  88
  89         // Handler of incoming messages from clients.
  90         static class IncomingHandler extends Handler {
  91                 private final WeakReference<TelemetryService> service;
  92                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
  93
  94                 @Override
  95                 public void handleMessage(Message msg) {
  96                         TelemetryService s = service.get();
  97                         AltosBluetooth bt = null;
  98                         if (s == null)
  99                                 return;
 100                         switch (msg.what) {
 101
 102                                 /* Messages from application */
 103                         case MSG_REGISTER_CLIENT:
 104                                 s.add_client(msg.replyTo);
 105                                 break;
 106                         case MSG_UNREGISTER_CLIENT:
 107                                 s.remove_client(msg.replyTo);
 108                                 break;
 109                         case MSG_CONNECT:
 110                                 if (D) Log.d(TAG, "Connect command received");
 111                                 DeviceAddress address = (DeviceAddress) msg.obj;
 112                                 AltosDroidPreferences.set_active_device(address);
 113                                 s.start_altos_bluetooth(address, false);
 114                                 break;
 115                         case MSG_DISCONNECT:
 116                                 if (D) Log.d(TAG, "Disconnect command received");
 117                                 s.address = null;
 118                                 s.stop_altos_bluetooth(true);
 119                                 break;
 120                         case MSG_SETFREQUENCY:
 121                                 if (D) Log.d(TAG, "MSG_SETFREQUENCY");
 122                                 s.telemetry_state.frequency = (Double) msg.obj;
 123                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 124                                         try {
 125                                                 s.altos_bluetooth.set_radio_frequency(s.telemetry_state.frequency);
 126                                                 s.altos_bluetooth.save_frequency();
 127                                         } catch (InterruptedException e) {
 128                                         } catch (TimeoutException e) {
 129                                         }
 130                                 }
 131                                 s.send_to_clients();
 132                                 break;
 133                         case MSG_SETBAUD:
 134                                 if (D) Log.d(TAG, "MSG_SETBAUD");
 135                                 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
 136                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 137                                         s.altos_bluetooth.set_telemetry_rate(s.telemetry_state.telemetry_rate);
 138                                         s.altos_bluetooth.save_telemetry_rate();
 139                                 }
 140                                 s.send_to_clients();
 141                                 break;
 142
 143                                 /*
 144                                  *Messages from AltosBluetooth
 145                                  */
 146                         case MSG_CONNECTED:
 147                                 Log.d(TAG, "MSG_CONNECTED");
 148                                 bt = (AltosBluetooth) msg.obj;
 149
 150                                 if (bt != s.altos_bluetooth) {
 151                                         if (D) Log.d(TAG, "Stale message");
 152                                         break;
 153                                 }
 154                                 if (D) Log.d(TAG, "Connected to device");
 155                                 try {
 156                                         s.connected();
 157                                 } catch (InterruptedException ie) {
 158                                 }
 159                                 break;
 160                         case MSG_CONNECT_FAILED:
 161                                 Log.d(TAG, "MSG_CONNECT_FAILED");
 162                                 bt = (AltosBluetooth) msg.obj;
 163
 164                                 if (bt != s.altos_bluetooth) {
 165                                         if (D) Log.d(TAG, "Stale message");
 166                                         break;
 167                                 }
 168                                 if (s.address != null) {
 169                                         if (D) Log.d(TAG, "Connection failed... retrying");
 170                                         s.start_altos_bluetooth(s.address, true);
 171                                 } else {
 172                                         s.stop_altos_bluetooth(true);
 173                                 }
 174                                 break;
 175                         case MSG_DISCONNECTED:
 176                                 Log.d(TAG, "MSG_DISCONNECTED");
 177                                 bt = (AltosBluetooth) msg.obj;
 178
 179                                 if (bt != s.altos_bluetooth) {
 180                                         if (D) Log.d(TAG, "Stale message");
 181                                         break;
 182                                 }
 183                                 if (s.address != null) {
 184                                         if (D) Log.d(TAG, "Connection lost... retrying");
 185                                         s.start_altos_bluetooth(s.address, true);
 186                                 } else {
 187                                         s.stop_altos_bluetooth(true);
 188                                 }
 189                                 break;
 190
 191                                 /*
 192                                  * Messages from TelemetryReader
 193                                  */
 194                         case MSG_TELEMETRY:
 195                                 s.telemetry_state.state = (AltosState) msg.obj;
 196                                 if (s.telemetry_state.state != null) {
 197                                         if (D) Log.d(TAG, "Save state");
 198                                         AltosPreferences.set_state(0, s.telemetry_state.state, null);
 199                                 }
 200                                 if (D) Log.d(TAG, "MSG_TELEMETRY");
 201                                 s.send_to_clients();
 202                                 break;
 203                         case MSG_CRC_ERROR:
 204                                 // forward crc error messages
 205                                 s.telemetry_state.crc_errors = (Integer) msg.obj;
 206                                 if (D) Log.d(TAG, "MSG_CRC_ERROR");
 207                                 s.send_to_clients();
 208                                 break;
 209                         default:
 210                                 super.handleMessage(msg);
 211                         }
 212                 }
 213         }
 214
 215         /* Construct the message to deliver to clients
 216          */
 217         private Message message() {
 218                 if (telemetry_state == null)
 219                         Log.d(TAG, "telemetry_state null!");
 220                 if (telemetry_state.state == null)
 221                         Log.d(TAG, "telemetry_state.state null!");
 222                 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
 223         }
 224
 225         /* A new friend has connected
 226          */
 227         private void add_client(Messenger client) {
 228
 229                 clients.add(client);
 230                 if (D) Log.d(TAG, "Client bound to service");
 231
 232                 /* On connect, send the current state to the new client
 233                  */
 234                 send_to_client(client, message());
 235
 236                 /* If we've got an address from a previous session, then
 237                  * go ahead and try to reconnect to the device
 238                  */
 239                 if (address != null && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 240                         if (D) Log.d(TAG, "Reconnecting now...");
 241                         start_altos_bluetooth(address, false);
 242                 }
 243         }
 244
 245         /* A client has disconnected, clean up
 246          */
 247         private void remove_client(Messenger client) {
 248                 clients.remove(client);
 249                 if (D) Log.d(TAG, "Client unbound from service");
 250
 251                 /* When the list of clients is empty, stop the service if
 252                  * we have no current telemetry source
 253                  */
 254
 255                  if (clients.isEmpty() && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 256                          if (!D) Log.d(TAG, "No clients, no connection. Stopping\n");
 257                          stopSelf();
 258                  }
 259         }
 260
 261         private void send_to_client(Messenger client, Message m) {
 262                 try {
 263                         if (D) Log.d(TAG, String.format("Send message to client %s", client.toString()));
 264                         client.send(m);
 265                 } catch (RemoteException e) {
 266                         if (D) Log.e(TAG, String.format("Client %s disappeared", client.toString()));
 267                         remove_client(client);
 268                 }
 269         }
 270
 271         private void send_to_clients() {
 272                 Message m = message();
 273                 if (D) Log.d(TAG, String.format("Send message to %d clients", clients.size()));
 274                 for (Messenger client : clients)
 275                         send_to_client(client, m);
 276         }
 277
 278         private void stop_altos_bluetooth(boolean notify) {
 279                 if (D) Log.d(TAG, "stop_altos_bluetooth(): begin");
 280                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 281                 telemetry_state.address = null;
 282
 283                 if (altos_bluetooth != null)
 284                         altos_bluetooth.closing();
 285
 286                 if (telemetry_reader != null) {
 287                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping TelemetryReader");
 288                         telemetry_reader.interrupt();
 289                         try {
 290                                 telemetry_reader.join();
 291                         } catch (InterruptedException e) {
 292                         }
 293                         telemetry_reader = null;
 294                 }
 295                 if (telemetry_logger != null) {
 296                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping TelemetryLogger");
 297                         telemetry_logger.stop();
 298                         telemetry_logger = null;
 299                 }
 300                 if (altos_bluetooth != null) {
 301                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping AltosBluetooth");
 302                         altos_bluetooth.close();
 303                         altos_bluetooth = null;
 304                 }
 305                 telemetry_state.config = null;
 306                 if (notify) {
 307                         if (D) Log.d(TAG, "stop_altos_bluetooth(): send message to clients");
 308                         send_to_clients();
 309                         if (clients.isEmpty()) {
 310                                 if (D) Log.d(TAG, "stop_altos_bluetooth(): no clients, terminating");
 311                                 stopSelf();
 312                         }
 313                 }
 314         }
 315
 316         private void start_altos_bluetooth(DeviceAddress address, boolean pause) {
 317                 // Get the BLuetoothDevice object
 318                 BluetoothDevice device = bluetooth_adapter.getRemoteDevice(address.address);
 319
 320                 stop_altos_bluetooth(false);
 321                 if (pause) {
 322                         try {
 323                                 Thread.sleep(4000);
 324                         } catch (InterruptedException e) {
 325                         }
 326                 }
 327                 this.address = address;
 328                 if (D) Log.d(TAG, String.format("start_altos_bluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
 329                 altos_bluetooth = new AltosBluetooth(device, handler);
 330                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
 331                 telemetry_state.address = address;
 332                 send_to_clients();
 333         }
 334
 335         private void connected() throws InterruptedException {
 336                 if (D) Log.d(TAG, "connected top");
 337                 try {
 338                         if (altos_bluetooth == null)
 339                                 throw new InterruptedException("no bluetooth");
 340                         telemetry_state.config = altos_bluetooth.config_data();
 341                         altos_bluetooth.set_radio_frequency(telemetry_state.frequency);
 342                         altos_bluetooth.set_telemetry_rate(telemetry_state.telemetry_rate);
 343                 } catch (TimeoutException e) {
 344                         // If this timed out, then we really want to retry it, but
 345                         // probably safer to just retry the connection from scratch.
 346                         if (D) Log.d(TAG, "connected timeout");
 347                         if (address != null) {
 348                                 if (D) Log.d(TAG, "connected timeout, retrying");
 349                                 start_altos_bluetooth(address, true);
 350                         } else {
 351                                 handler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 352                                 stop_altos_bluetooth(true);
 353                         }
 354                         return;
 355                 }
 356
 357                 if (D) Log.d(TAG, "connected bluetooth configured");
 358                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
 359                 telemetry_state.address = address;
 360
 361                 telemetry_reader = new TelemetryReader(altos_bluetooth, handler, telemetry_state.state);
 362                 telemetry_reader.start();
 363
 364                 if (D) Log.d(TAG, "connected TelemetryReader started");
 365
 366                 telemetry_logger = new TelemetryLogger(this, altos_bluetooth);
 367
 368                 if (D) Log.d(TAG, "Notify UI of connection");
 369
 370                 send_to_clients();
 371         }
 372
 373
 374         @Override
 375         public void onCreate() {
 376                 // Get local Bluetooth adapter
 377                 bluetooth_adapter = BluetoothAdapter.getDefaultAdapter();
 378
 379                 // If the adapter is null, then Bluetooth is not supported
 380                 if (bluetooth_adapter == null) {
 381                         Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
 382                 }
 383
 384                 // Initialise preferences
 385                 AltosDroidPreferences.init(this);
 386
 387                 telemetry_state = new TelemetryState();
 388
 389                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 390                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 391
 392                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 393                 telemetry_state.address = null;
 394
 395                 AltosSavedState saved_state = AltosPreferences.state(0);
 396
 397                 if (saved_state != null) {
 398                         if (D) Log.d(TAG, String.format("recovered old state flight %d\n", saved_state.state.flight));
 399                         telemetry_state.state = saved_state.state;
 400                 }
 401
 402                 // Listen for GPS and Network position updates
 403                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 404
 405                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
 406
 407                 DeviceAddress address = AltosDroidPreferences.active_device();
 408                 if (address != null)
 409                         start_altos_bluetooth(address, false);
 410         }
 411
 412         @Override
 413         public int onStartCommand(Intent intent, int flags, int startId) {
 414                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 415
 416                 CharSequence text = getText(R.string.telemetry_service_started);
 417
 418                 // Create notification to be displayed while the service runs
 419                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 420
 421                 // The PendingIntent to launch our activity if the user selects this notification
 422                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 423                                 new Intent(this, AltosDroid.class), 0);
 424
 425                 // Set the info for the views that show in the notification panel.
 426                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 427
 428                 // Set the notification to be in the "Ongoing" section.
 429                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 430
 431                 // Move us into the foreground.
 432                 startForeground(NOTIFICATION, notification);
 433
 434                 // We want this service to continue running until it is explicitly
 435                 // stopped, so return sticky.
 436                 return START_STICKY;
 437         }
 438
 439         @Override
 440         public void onDestroy() {
 441
 442                 // Stop listening for location updates
 443                 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
 444
 445                 // Stop the bluetooth Comms threads
 446                 stop_altos_bluetooth(true);
 447
 448                 // Demote us from the foreground, and cancel the persistent notification.
 449                 stopForeground(true);
 450
 451                 // Tell the user we stopped.
 452                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 453         }
 454
 455         @Override
 456         public IBinder onBind(Intent intent) {
 457                 return messenger.getBinder();
 458         }
 459
 460
 461         public void onLocationChanged(Location location) {
 462                 telemetry_state.location = location;
 463                 if (D) Log.d(TAG, "location changed");
 464                 send_to_clients();
 465         }
 466
 467         public void onStatusChanged(String provider, int status, Bundle extras) {
 468         }
 469
 470         public void onProviderEnabled(String provider) {
 471         }
 472
 473         public void onProviderDisabled(String provider) {
 474         }
 475
 476 }