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                         if (s == null)
  98                                 return;
  99                         switch (msg.what) {
 100
 101                                 /* Messages from application */
 102                         case MSG_REGISTER_CLIENT:
 103                                 s.add_client(msg.replyTo);
 104                                 break;
 105                         case MSG_UNREGISTER_CLIENT:
 106                                 s.remove_client(msg.replyTo);
 107                                 break;
 108                         case MSG_CONNECT:
 109                                 if (D) Log.d(TAG, "Connect command received");
 110                                 DeviceAddress address = (DeviceAddress) msg.obj;
 111                                 AltosDroidPreferences.set_active_device(address);
 112                                 s.start_altos_bluetooth(address);
 113                                 break;
 114                         case MSG_DISCONNECT:
 115                                 if (D) Log.d(TAG, "Disconnect command received");
 116                                 s.address = null;
 117                                 s.stop_altos_bluetooth(true);
 118                                 break;
 119                         case MSG_SETFREQUENCY:
 120                                 if (D) Log.d(TAG, "MSG_SETFREQUENCY");
 121                                 s.telemetry_state.frequency = (Double) msg.obj;
 122                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 123                                         try {
 124                                                 s.altos_bluetooth.set_radio_frequency(s.telemetry_state.frequency);
 125                                                 s.altos_bluetooth.save_frequency();
 126                                         } catch (InterruptedException e) {
 127                                         } catch (TimeoutException e) {
 128                                         }
 129                                 }
 130                                 s.send_to_clients();
 131                                 break;
 132                         case MSG_SETBAUD:
 133                                 if (D) Log.d(TAG, "MSG_SETBAUD");
 134                                 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
 135                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 136                                         s.altos_bluetooth.set_telemetry_rate(s.telemetry_state.telemetry_rate);
 137                                         s.altos_bluetooth.save_telemetry_rate();
 138                                 }
 139                                 s.send_to_clients();
 140                                 break;
 141
 142                                 /*
 143                                  *Messages from AltosBluetooth
 144                                  */
 145                         case MSG_CONNECTED:
 146                                 if (D) Log.d(TAG, "Connected to device");
 147                                 try {
 148                                         s.connected();
 149                                 } catch (InterruptedException ie) {
 150                                 }
 151                                 break;
 152                         case MSG_CONNECT_FAILED:
 153                                 if (s.address != null) {
 154                                         if (D) Log.d(TAG, "Connection failed... retrying");
 155                                         s.start_altos_bluetooth(s.address);
 156                                 } else {
 157                                         s.stop_altos_bluetooth(true);
 158                                 }
 159                                 break;
 160                         case MSG_DISCONNECTED:
 161                                 Log.d(TAG, "MSG_DISCONNECTED");
 162                                 if (s.address != null) {
 163                                         if (D) Log.d(TAG, "Connection lost... retrying");
 164                                         s.start_altos_bluetooth(s.address);
 165                                 } else {
 166                                         s.stop_altos_bluetooth(true);
 167                                 }
 168                                 break;
 169
 170                                 /*
 171                                  * Messages from TelemetryReader
 172                                  */
 173                         case MSG_TELEMETRY:
 174                                 s.telemetry_state.state = (AltosState) msg.obj;
 175                                 if (s.telemetry_state.state != null) {
 176                                         if (D) Log.d(TAG, "Save state");
 177                                         AltosPreferences.set_state(0, s.telemetry_state.state, null);
 178                                 }
 179                                 if (D) Log.d(TAG, "MSG_TELEMETRY");
 180                                 s.send_to_clients();
 181                                 break;
 182                         case MSG_CRC_ERROR:
 183                                 // forward crc error messages
 184                                 s.telemetry_state.crc_errors = (Integer) msg.obj;
 185                                 if (D) Log.d(TAG, "MSG_CRC_ERROR");
 186                                 s.send_to_clients();
 187                                 break;
 188                         default:
 189                                 super.handleMessage(msg);
 190                         }
 191                 }
 192         }
 193
 194         /* Construct the message to deliver to clients
 195          */
 196         private Message message() {
 197                 if (telemetry_state == null)
 198                         Log.d(TAG, "telemetry_state null!");
 199                 if (telemetry_state.state == null)
 200                         Log.d(TAG, "telemetry_state.state null!");
 201                 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
 202         }
 203
 204         /* A new friend has connected
 205          */
 206         private void add_client(Messenger client) {
 207
 208                 clients.add(client);
 209                 if (D) Log.d(TAG, "Client bound to service");
 210
 211                 /* On connect, send the current state to the new client
 212                  */
 213                 send_to_client(client, message());
 214
 215                 /* If we've got an address from a previous session, then
 216                  * go ahead and try to reconnect to the device
 217                  */
 218                 if (address != null && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 219                         if (D) Log.d(TAG, "Reconnecting now...");
 220                         start_altos_bluetooth(address);
 221                 }
 222         }
 223
 224         /* A client has disconnected, clean up
 225          */
 226         private void remove_client(Messenger client) {
 227                 clients.remove(client);
 228                 if (D) Log.d(TAG, "Client unbound from service");
 229
 230                 /* When the list of clients is empty, stop the service if
 231                  * we have no current telemetry source
 232                  */
 233
 234                  if (clients.isEmpty() && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 235                          if (!D) Log.d(TAG, "No clients, no connection. Stopping\n");
 236                          stopSelf();
 237                  }
 238         }
 239
 240         private void send_to_client(Messenger client, Message m) {
 241                 try {
 242                         if (D) Log.d(TAG, String.format("Send message to client %s", client.toString()));
 243                         client.send(m);
 244                 } catch (RemoteException e) {
 245                         if (D) Log.e(TAG, String.format("Client %s disappeared", client.toString()));
 246                         remove_client(client);
 247                 }
 248         }
 249
 250         private void send_to_clients() {
 251                 Message m = message();
 252                 if (D) Log.d(TAG, String.format("Send message to %d clients", clients.size()));
 253                 for (Messenger client : clients)
 254                         send_to_client(client, m);
 255         }
 256
 257         private void stop_altos_bluetooth(boolean notify) {
 258                 if (D) Log.d(TAG, "stop_altos_bluetooth(): begin");
 259                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 260                 telemetry_state.address = null;
 261
 262                 if (altos_bluetooth != null)
 263                         altos_bluetooth.closing();
 264
 265                 if (telemetry_reader != null) {
 266                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping TelemetryReader");
 267                         telemetry_reader.interrupt();
 268                         try {
 269                                 telemetry_reader.join();
 270                         } catch (InterruptedException e) {
 271                         }
 272                         telemetry_reader = null;
 273                 }
 274                 if (telemetry_logger != null) {
 275                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping TelemetryLogger");
 276                         telemetry_logger.stop();
 277                         telemetry_logger = null;
 278                 }
 279                 if (altos_bluetooth != null) {
 280                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping AltosBluetooth");
 281                         altos_bluetooth.close();
 282                         altos_bluetooth = null;
 283                 }
 284                 telemetry_state.config = null;
 285                 if (notify) {
 286                         if (D) Log.d(TAG, "stop_altos_bluetooth(): send message to clients");
 287                         send_to_clients();
 288                         if (clients.isEmpty()) {
 289                                 if (D) Log.d(TAG, "stop_altos_bluetooth(): no clients, terminating");
 290                                 stopSelf();
 291                         }
 292                 }
 293         }
 294
 295         private void start_altos_bluetooth(DeviceAddress address) {
 296                 // Get the BLuetoothDevice object
 297                 BluetoothDevice device = bluetooth_adapter.getRemoteDevice(address.address);
 298
 299                 stop_altos_bluetooth(false);
 300                 this.address = address;
 301                 if (D) Log.d(TAG, String.format("start_altos_bluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
 302                 altos_bluetooth = new AltosBluetooth(device, handler);
 303                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
 304                 telemetry_state.address = address;
 305                 send_to_clients();
 306         }
 307
 308         private void connected() throws InterruptedException {
 309                 if (D) Log.d(TAG, "connected top");
 310                 try {
 311                         if (altos_bluetooth == null)
 312                                 throw new InterruptedException("no bluetooth");
 313                         telemetry_state.config = altos_bluetooth.config_data();
 314                         altos_bluetooth.set_radio_frequency(telemetry_state.frequency);
 315                         altos_bluetooth.set_telemetry_rate(telemetry_state.telemetry_rate);
 316                 } catch (TimeoutException e) {
 317                         // If this timed out, then we really want to retry it, but
 318                         // probably safer to just retry the connection from scratch.
 319                         handler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 320                         return;
 321                 }
 322
 323                 if (D) Log.d(TAG, "connected bluetooth configured");
 324                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
 325                 telemetry_state.address = address;
 326
 327                 telemetry_reader = new TelemetryReader(altos_bluetooth, handler, telemetry_state.state);
 328                 telemetry_reader.start();
 329
 330                 if (D) Log.d(TAG, "connected TelemetryReader started");
 331
 332                 telemetry_logger = new TelemetryLogger(this, altos_bluetooth);
 333
 334                 if (D) Log.d(TAG, "Notify UI of connection");
 335
 336                 send_to_clients();
 337         }
 338
 339
 340         @Override
 341         public void onCreate() {
 342                 // Get local Bluetooth adapter
 343                 bluetooth_adapter = BluetoothAdapter.getDefaultAdapter();
 344
 345                 // If the adapter is null, then Bluetooth is not supported
 346                 if (bluetooth_adapter == null) {
 347                         Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
 348                 }
 349
 350                 // Initialise preferences
 351                 AltosDroidPreferences.init(this);
 352
 353                 telemetry_state = new TelemetryState();
 354
 355                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 356                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 357
 358                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 359                 telemetry_state.address = null;
 360
 361                 AltosSavedState saved_state = AltosPreferences.state(0);
 362
 363                 if (saved_state != null) {
 364                         if (D) Log.d(TAG, String.format("recovered old state flight %d\n", saved_state.state.flight));
 365                         telemetry_state.state = saved_state.state;
 366                 }
 367
 368                 // Listen for GPS and Network position updates
 369                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 370
 371                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
 372
 373                 DeviceAddress address = AltosDroidPreferences.active_device();
 374                 if (address != null)
 375                         start_altos_bluetooth(address);
 376         }
 377
 378         @Override
 379         public int onStartCommand(Intent intent, int flags, int startId) {
 380                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 381
 382                 CharSequence text = getText(R.string.telemetry_service_started);
 383
 384                 // Create notification to be displayed while the service runs
 385                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 386
 387                 // The PendingIntent to launch our activity if the user selects this notification
 388                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 389                                 new Intent(this, AltosDroid.class), 0);
 390
 391                 // Set the info for the views that show in the notification panel.
 392                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 393
 394                 // Set the notification to be in the "Ongoing" section.
 395                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 396
 397                 // Move us into the foreground.
 398                 startForeground(NOTIFICATION, notification);
 399
 400                 // We want this service to continue running until it is explicitly
 401                 // stopped, so return sticky.
 402                 return START_STICKY;
 403         }
 404
 405         @Override
 406         public void onDestroy() {
 407
 408                 // Stop listening for location updates
 409                 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
 410
 411                 // Stop the bluetooth Comms threads
 412                 stop_altos_bluetooth(true);
 413
 414                 // Demote us from the foreground, and cancel the persistent notification.
 415                 stopForeground(true);
 416
 417                 // Tell the user we stopped.
 418                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 419         }
 420
 421         @Override
 422         public IBinder onBind(Intent intent) {
 423                 return messenger.getBinder();
 424         }
 425
 426
 427         public void onLocationChanged(Location location) {
 428                 telemetry_state.location = location;
 429                 if (D) Log.d(TAG, "location changed");
 430                 send_to_clients();
 431         }
 432
 433         public void onStatusChanged(String provider, int status, Bundle extras) {
 434         }
 435
 436         public void onProviderEnabled(String provider) {
 437         }
 438
 439         public void onProviderDisabled(String provider) {
 440         }
 441
 442 }