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
  67         // Unique Identification Number for the Notification.
  68         // We use it on Notification start, and to cancel it.
  69         private int NOTIFICATION = R.string.telemetry_service_label;
  70         //private NotificationManager mNM;
  71
  72         ArrayList<Messenger> clients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  73         final Handler   handler   = new IncomingHandler(this);
  74         final Messenger messenger = new Messenger(handler); // Target we publish for clients to send messages to IncomingHandler.
  75
  76         // Name of the connected device
  77         DeviceAddress address;
  78         private AltosBluetooth  altos_bluetooth  = null;
  79         private TelemetryReader telemetry_reader = null;
  80         private TelemetryLogger telemetry_logger = null;
  81
  82         // Local Bluetooth adapter
  83         private BluetoothAdapter bluetooth_adapter = null;
  84
  85         // Last data seen; send to UI when it starts
  86         private TelemetryState  telemetry_state;
  87
  88         // Handler of incoming messages from clients.
  89         static class IncomingHandler extends Handler {
  90                 private final WeakReference<TelemetryService> service;
  91                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
  92
  93                 @Override
  94                 public void handleMessage(Message msg) {
  95                         TelemetryService s = service.get();
  96                         if (s == null)
  97                                 return;
  98                         switch (msg.what) {
  99
 100                                 /* Messages from application */
 101                         case MSG_REGISTER_CLIENT:
 102                                 s.add_client(msg.replyTo);
 103                                 break;
 104                         case MSG_UNREGISTER_CLIENT:
 105                                 s.remove_client(msg.replyTo);
 106                                 break;
 107                         case MSG_CONNECT:
 108                                 if (D) Log.d(TAG, "Connect command received");
 109                                 DeviceAddress address = (DeviceAddress) msg.obj;
 110                                 AltosDroidPreferences.set_active_device(address);
 111                                 s.start_altos_bluetooth(address);
 112                                 break;
 113                         case MSG_SETFREQUENCY:
 114                                 if (D) Log.d(TAG, "MSG_SETFREQUENCY");
 115                                 s.telemetry_state.frequency = (Double) msg.obj;
 116                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 117                                         try {
 118                                                 s.altos_bluetooth.set_radio_frequency(s.telemetry_state.frequency);
 119                                                 s.altos_bluetooth.save_frequency();
 120                                         } catch (InterruptedException e) {
 121                                         } catch (TimeoutException e) {
 122                                         }
 123                                 }
 124                                 s.send_to_clients();
 125                                 break;
 126                         case MSG_SETBAUD:
 127                                 if (D) Log.d(TAG, "MSG_SETBAUD");
 128                                 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
 129                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 130                                         s.altos_bluetooth.set_telemetry_rate(s.telemetry_state.telemetry_rate);
 131                                         s.altos_bluetooth.save_telemetry_rate();
 132                                 }
 133                                 s.send_to_clients();
 134                                 break;
 135
 136                                 /*
 137                                  *Messages from AltosBluetooth
 138                                  */
 139                         case MSG_CONNECTED:
 140                                 if (D) Log.d(TAG, "Connected to device");
 141                                 try {
 142                                         s.connected();
 143                                 } catch (InterruptedException ie) {
 144                                 }
 145                                 break;
 146                         case MSG_CONNECT_FAILED:
 147                                 if (s.address != null && !s.clients.isEmpty()) {
 148                                         if (D) Log.d(TAG, "Connection failed... retrying");
 149                                         s.start_altos_bluetooth(s.address);
 150                                 } else {
 151                                         s.stop_altos_bluetooth(true);
 152                                 }
 153                                 break;
 154                         case MSG_DISCONNECTED:
 155                                 Log.d(TAG, "MSG_DISCONNECTED");
 156                                 if (s.address != null && !s.clients.isEmpty()) {
 157                                         if (D) Log.d(TAG, "Connection lost... retrying");
 158                                         s.start_altos_bluetooth(s.address);
 159                                 } else {
 160                                         s.stop_altos_bluetooth(true);
 161                                 }
 162                                 break;
 163
 164                                 /*
 165                                  * Messages from TelemetryReader
 166                                  */
 167                         case MSG_TELEMETRY:
 168                                 s.telemetry_state.state = (AltosState) msg.obj;
 169                                 if (s.telemetry_state.state != null) {
 170                                         if (D) Log.d(TAG, "Save state");
 171                                         AltosPreferences.set_state(0, s.telemetry_state.state, null);
 172                                 }
 173                                 if (D) Log.d(TAG, "MSG_TELEMETRY");
 174                                 s.send_to_clients();
 175                                 break;
 176                         case MSG_CRC_ERROR:
 177                                 // forward crc error messages
 178                                 s.telemetry_state.crc_errors = (Integer) msg.obj;
 179                                 if (D) Log.d(TAG, "MSG_CRC_ERROR");
 180                                 s.send_to_clients();
 181                                 break;
 182                         default:
 183                                 super.handleMessage(msg);
 184                         }
 185                 }
 186         }
 187
 188         /* Construct the message to deliver to clients
 189          */
 190         private Message message() {
 191                 if (telemetry_state == null)
 192                         Log.d(TAG, "telemetry_state null!");
 193                 if (telemetry_state.state == null)
 194                         Log.d(TAG, "telemetry_state.state null!");
 195                 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
 196         }
 197
 198         /* A new friend has connected
 199          */
 200         private void add_client(Messenger client) {
 201
 202                 clients.add(client);
 203                 if (D) Log.d(TAG, "Client bound to service");
 204
 205                 /* On connect, send the current state to the new client
 206                  */
 207                 send_to_client(client, message());
 208
 209                 /* If we've got an address from a previous session, then
 210                  * go ahead and try to reconnect to the device
 211                  */
 212                 if (address != null && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 213                         if (D) Log.d(TAG, "Reconnecting now...");
 214                         start_altos_bluetooth(address);
 215                 }
 216         }
 217
 218         /* A client has disconnected, clean up
 219          */
 220         private void remove_client(Messenger client) {
 221                 clients.remove(client);
 222                 if (D) Log.d(TAG, "Client unbound from service");
 223
 224                 /* When the list of clients is empty, stop the service if
 225                  * we have no current telemetry source
 226                  */
 227
 228                  if (clients.isEmpty() && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 229                          if (!D) Log.d(TAG, "No clients, no connection. Stopping\n");
 230                          stopSelf();
 231                  }
 232         }
 233
 234         private void send_to_client(Messenger client, Message m) {
 235                 try {
 236                         if (D) Log.d(TAG, String.format("Send message to client %s", client.toString()));
 237                         client.send(m);
 238                 } catch (RemoteException e) {
 239                         if (D) Log.e(TAG, String.format("Client %s disappeared", client.toString()));
 240                         remove_client(client);
 241                 }
 242         }
 243
 244         private void send_to_clients() {
 245                 Message m = message();
 246                 if (D) Log.d(TAG, String.format("Send message to %d clients", clients.size()));
 247                 for (Messenger client : clients)
 248                         send_to_client(client, m);
 249         }
 250
 251         private void stop_altos_bluetooth(boolean notify) {
 252                 if (D) Log.d(TAG, "stop_altos_bluetooth(): begin");
 253                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 254                 telemetry_state.address = null;
 255
 256                 if (altos_bluetooth != null)
 257                         altos_bluetooth.closing();
 258
 259                 if (telemetry_reader != null) {
 260                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping TelemetryReader");
 261                         telemetry_reader.interrupt();
 262                         try {
 263                                 telemetry_reader.join();
 264                         } catch (InterruptedException e) {
 265                         }
 266                         telemetry_reader = null;
 267                 }
 268                 if (telemetry_logger != null) {
 269                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping TelemetryLogger");
 270                         telemetry_logger.stop();
 271                         telemetry_logger = null;
 272                 }
 273                 if (altos_bluetooth != null) {
 274                         if (D) Log.d(TAG, "stop_altos_bluetooth(): stopping AltosBluetooth");
 275                         altos_bluetooth.close();
 276                         altos_bluetooth = null;
 277                 }
 278                 telemetry_state.config = null;
 279                 if (notify) {
 280                         if (D) Log.d(TAG, "stop_altos_bluetooth(): send message to clients");
 281                         send_to_clients();
 282                         if (clients.isEmpty()) {
 283                                 if (D) Log.d(TAG, "stop_altos_bluetooth(): no clients, terminating");
 284                                 stopSelf();
 285                         }
 286                 }
 287         }
 288
 289         private void start_altos_bluetooth(DeviceAddress address) {
 290                 // Get the BLuetoothDevice object
 291                 BluetoothDevice device = bluetooth_adapter.getRemoteDevice(address.address);
 292
 293                 stop_altos_bluetooth(false);
 294                 this.address = address;
 295                 if (D) Log.d(TAG, String.format("start_altos_bluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
 296                 altos_bluetooth = new AltosBluetooth(device, handler);
 297                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
 298                 telemetry_state.address = address;
 299                 send_to_clients();
 300         }
 301
 302         private void connected() throws InterruptedException {
 303                 if (D) Log.d(TAG, "connected top");
 304                 try {
 305                         if (altos_bluetooth == null)
 306                                 throw new InterruptedException("no bluetooth");
 307                         telemetry_state.config = altos_bluetooth.config_data();
 308                         altos_bluetooth.set_radio_frequency(telemetry_state.frequency);
 309                         altos_bluetooth.set_telemetry_rate(telemetry_state.telemetry_rate);
 310                 } catch (TimeoutException e) {
 311                         // If this timed out, then we really want to retry it, but
 312                         // probably safer to just retry the connection from scratch.
 313                         handler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 314                         return;
 315                 }
 316
 317                 if (D) Log.d(TAG, "connected bluetooth configured");
 318                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
 319                 telemetry_state.address = address;
 320
 321                 telemetry_reader = new TelemetryReader(altos_bluetooth, handler, telemetry_state.state);
 322                 telemetry_reader.start();
 323
 324                 if (D) Log.d(TAG, "connected TelemetryReader started");
 325
 326                 telemetry_logger = new TelemetryLogger(this, altos_bluetooth);
 327
 328                 if (D) Log.d(TAG, "Notify UI of connection");
 329
 330                 send_to_clients();
 331         }
 332
 333
 334         @Override
 335         public void onCreate() {
 336                 // Get local Bluetooth adapter
 337                 bluetooth_adapter = BluetoothAdapter.getDefaultAdapter();
 338
 339                 // If the adapter is null, then Bluetooth is not supported
 340                 if (bluetooth_adapter == null) {
 341                         Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
 342                 }
 343
 344                 // Initialise preferences
 345                 AltosDroidPreferences.init(this);
 346
 347                 telemetry_state = new TelemetryState();
 348
 349                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 350                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 351
 352                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 353                 telemetry_state.address = null;
 354
 355                 AltosSavedState saved_state = AltosPreferences.state(0);
 356
 357                 if (saved_state != null) {
 358                         if (D) Log.d(TAG, String.format("recovered old state flight %d\n", saved_state.state.flight));
 359                         telemetry_state.state = saved_state.state;
 360                 }
 361
 362                 // Listen for GPS and Network position updates
 363                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 364
 365                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
 366
 367                 DeviceAddress address = AltosDroidPreferences.active_device();
 368                 if (address != null)
 369                         start_altos_bluetooth(address);
 370         }
 371
 372         @Override
 373         public int onStartCommand(Intent intent, int flags, int startId) {
 374                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 375
 376                 CharSequence text = getText(R.string.telemetry_service_started);
 377
 378                 // Create notification to be displayed while the service runs
 379                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 380
 381                 // The PendingIntent to launch our activity if the user selects this notification
 382                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 383                                 new Intent(this, AltosDroid.class), 0);
 384
 385                 // Set the info for the views that show in the notification panel.
 386                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 387
 388                 // Set the notification to be in the "Ongoing" section.
 389                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 390
 391                 // Move us into the foreground.
 392                 startForeground(NOTIFICATION, notification);
 393
 394                 // We want this service to continue running until it is explicitly
 395                 // stopped, so return sticky.
 396                 return START_STICKY;
 397         }
 398
 399         @Override
 400         public void onDestroy() {
 401
 402                 // Stop listening for location updates
 403                 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
 404
 405                 // Stop the bluetooth Comms threads
 406                 stop_altos_bluetooth(true);
 407
 408                 // Demote us from the foreground, and cancel the persistent notification.
 409                 stopForeground(true);
 410
 411                 // Tell the user we stopped.
 412                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 413         }
 414
 415         @Override
 416         public IBinder onBind(Intent intent) {
 417                 return messenger.getBinder();
 418         }
 419
 420
 421         public void onLocationChanged(Location location) {
 422                 telemetry_state.location = location;
 423                 if (D) Log.d(TAG, "location changed");
 424                 send_to_clients();
 425         }
 426
 427         public void onStatusChanged(String provider, int status, Bundle extras) {
 428         }
 429
 430         public void onProviderEnabled(String provider) {
 431         }
 432
 433         public void onProviderDisabled(String provider) {
 434         }
 435
 436 }