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_5.*;
  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         // Timer - we wake up every now and then to decide if the service should stop
  73         private Timer timer = new Timer();
  74
  75         ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  76         final Handler   mHandler   = new IncomingHandler(this);
  77         final Messenger mMessenger = new Messenger(mHandler); // Target we publish for clients to send messages to IncomingHandler.
  78
  79         // Name of the connected device
  80         String address;
  81         private AltosBluetooth  mAltosBluetooth  = null;
  82         private TelemetryReader mTelemetryReader = null;
  83         private TelemetryLogger mTelemetryLogger = null;
  84         // Local Bluetooth adapter
  85         private BluetoothAdapter mBluetoothAdapter = null;
  86
  87         private TelemetryState  telemetry_state;
  88
  89         // Last data seen; send to UI when it starts
  90
  91         // Handler of incoming messages from clients.
  92         static class IncomingHandler extends Handler {
  93                 private final WeakReference<TelemetryService> service;
  94                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
  95
  96                 @Override
  97                 public void handleMessage(Message msg) {
  98                         TelemetryService s = service.get();
  99                         if (s == null)
 100                                 return;
 101                         switch (msg.what) {
 102                         case MSG_REGISTER_CLIENT:
 103                                 s.mClients.add(msg.replyTo);
 104                                 try {
 105                                         // Now we try to send the freshly connected UI any relavant information about what
 106                                         // we're talking to
 107                                         msg.replyTo.send(s.message());
 108                                 } catch (RemoteException e) {
 109                                         s.mClients.remove(msg.replyTo);
 110                                 }
 111                                 if (D) Log.d(TAG, "Client bound to service");
 112                                 break;
 113                         case MSG_UNREGISTER_CLIENT:
 114                                 s.mClients.remove(msg.replyTo);
 115                                 if (D) Log.d(TAG, "Client unbound from service");
 116                                 break;
 117                         case MSG_CONNECT:
 118                                 if (D) Log.d(TAG, "Connect command received");
 119                                 String address = (String) msg.obj;
 120                                 AltosDroidPreferences.set_active_device(address);
 121                                 s.startAltosBluetooth(address);
 122                                 break;
 123                         case MSG_CONNECTED:
 124                                 if (D) Log.d(TAG, "Connected to device");
 125                                 try {
 126                                         s.connected();
 127                                 } catch (InterruptedException ie) {
 128                                 }
 129                                 break;
 130                         case MSG_CONNECT_FAILED:
 131                                 if (D) Log.d(TAG, "Connection failed... retrying");
 132                                 if (s.address != null)
 133                                         s.startAltosBluetooth(s.address);
 134                                 break;
 135                         case MSG_DISCONNECTED:
 136                                 Log.d(TAG, "MSG_DISCONNECTED");
 137                                 s.stopAltosBluetooth();
 138                                 break;
 139                         case MSG_TELEMETRY:
 140                                 // forward telemetry messages
 141                                 s.telemetry_state.state = (AltosState) msg.obj;
 142                                 if (D) Log.d(TAG, "MSG_TELEMETRY");
 143                                 s.sendMessageToClients();
 144                                 break;
 145                         case MSG_CRC_ERROR:
 146                                 // forward crc error messages
 147                                 s.telemetry_state.crc_errors = (Integer) msg.obj;
 148                                 if (D) Log.d(TAG, "MSG_CRC_ERROR");
 149                                 s.sendMessageToClients();
 150                                 break;
 151                         case MSG_SETFREQUENCY:
 152                                 if (D) Log.d(TAG, "MSG_SETFREQUENCY");
 153                                 s.telemetry_state.frequency = (Double) msg.obj;
 154                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 155                                         try {
 156                                                 s.mAltosBluetooth.set_radio_frequency(s.telemetry_state.frequency);
 157                                                 s.mAltosBluetooth.save_frequency();
 158                                         } catch (InterruptedException e) {
 159                                         } catch (TimeoutException e) {
 160                                         }
 161                                 }
 162                                 s.sendMessageToClients();
 163                                 break;
 164                         case MSG_SETBAUD:
 165                                 if (D) Log.d(TAG, "MSG_SETBAUD");
 166                                 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
 167                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 168                                         s.mAltosBluetooth.set_telemetry_rate(s.telemetry_state.telemetry_rate);
 169                                         s.mAltosBluetooth.save_telemetry_rate();
 170                                 }
 171                                 s.sendMessageToClients();
 172                                 break;
 173                         default:
 174                                 super.handleMessage(msg);
 175                         }
 176                 }
 177         }
 178
 179         private Message message() {
 180                 if (telemetry_state == null)
 181                         Log.d(TAG, "telemetry_state null!");
 182                 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
 183         }
 184
 185         private void sendMessageToClients() {
 186                 Message m = message();
 187                 if (D) Log.d(TAG, String.format("Send message to %d clients", mClients.size()));
 188                 for (int i=mClients.size()-1; i>=0; i--) {
 189                         try {
 190                                 if (D) Log.d(TAG, String.format("Send message to client %d", i));
 191                                 mClients.get(i).send(m);
 192                         } catch (RemoteException e) {
 193                                 mClients.remove(i);
 194                         }
 195                 }
 196         }
 197
 198         private void stopAltosBluetooth() {
 199                 if (D) Log.d(TAG, "stopAltosBluetooth(): begin");
 200                 telemetry_state.connect = TelemetryState.CONNECT_READY;
 201                 if (mTelemetryReader != null) {
 202                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryReader");
 203                         mTelemetryReader.interrupt();
 204                         try {
 205                                 mTelemetryReader.join();
 206                         } catch (InterruptedException e) {
 207                         }
 208                         mTelemetryReader = null;
 209                 }
 210                 if (mTelemetryLogger != null) {
 211                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryLogger");
 212                         mTelemetryLogger.stop();
 213                         mTelemetryLogger = null;
 214                 }
 215                 if (mAltosBluetooth != null) {
 216                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth");
 217                         mAltosBluetooth.close();
 218                         mAltosBluetooth = null;
 219                 }
 220                 telemetry_state.config = null;
 221                 if (D) Log.d(TAG, "stopAltosBluetooth(): send message to clients");
 222                 sendMessageToClients();
 223         }
 224
 225         private void startAltosBluetooth(String address) {
 226                 // Get the BLuetoothDevice object
 227                 BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
 228
 229                 this.address = address;
 230                 if (mAltosBluetooth == null) {
 231                         if (D) Log.d(TAG, String.format("startAltosBluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
 232                         mAltosBluetooth = new AltosBluetooth(device, mHandler);
 233                         telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
 234                         sendMessageToClients();
 235                 } else {
 236                         // This is a bit of a hack - if it appears we're still connected, we treat this as a restart.
 237                         // So, to give a suitable delay to teardown/bringup, we just schedule a resend of a message
 238                         // to ourselves in a few seconds time that will ultimately call this method again.
 239                         // ... then we tear down the existing connection.
 240                         // We do it this way around so that we don't lose a reference to the device when this method
 241                         // is called on reception of MSG_CONNECT_FAILED in the handler above.
 242                         mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, address), 3000);
 243                         stopAltosBluetooth();
 244                 }
 245         }
 246
 247         private void connected() throws InterruptedException {
 248                 if (D) Log.d(TAG, "connected top");
 249                 try {
 250                         if (mAltosBluetooth == null)
 251                                 throw new InterruptedException("no bluetooth");
 252                         telemetry_state.config = mAltosBluetooth.config_data();
 253                         mAltosBluetooth.set_radio_frequency(telemetry_state.frequency);
 254                         mAltosBluetooth.set_telemetry_rate(telemetry_state.telemetry_rate);
 255                 } catch (TimeoutException e) {
 256                         // If this timed out, then we really want to retry it, but
 257                         // probably safer to just retry the connection from scratch.
 258                         mHandler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 259                         return;
 260                 }
 261
 262                 if (D) Log.d(TAG, "connected bluetooth configured");
 263                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
 264
 265                 mTelemetryReader = new TelemetryReader(mAltosBluetooth, mHandler);
 266                 mTelemetryReader.start();
 267
 268                 if (D) Log.d(TAG, "connected TelemetryReader started");
 269
 270                 mTelemetryLogger = new TelemetryLogger(this, mAltosBluetooth);
 271
 272                 if (D) Log.d(TAG, "Notify UI of connection");
 273
 274                 sendMessageToClients();
 275         }
 276
 277         private void onTimerTick() {
 278                 if (D) Log.d(TAG, "Timer wakeup");
 279                 try {
 280                         if (mClients.size() <= 0 && telemetry_state.connect != TelemetryState.CONNECT_CONNECTED) {
 281                                 stopSelf();
 282                         }
 283                 } catch (Throwable t) {
 284                         Log.e(TAG, "Timer failed: ", t);
 285                 }
 286         }
 287
 288
 289         @Override
 290         public void onCreate() {
 291                 // Get local Bluetooth adapter
 292                 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
 293
 294                 // If the adapter is null, then Bluetooth is not supported
 295                 if (mBluetoothAdapter == null) {
 296                         Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
 297                 }
 298
 299                 // Initialise preferences
 300                 AltosDroidPreferences.init(this);
 301
 302                 telemetry_state = new TelemetryState();
 303
 304                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 305                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 306
 307                 telemetry_state.connect = TelemetryState.CONNECT_READY;
 308
 309                 // Start our timer - first event in 10 seconds, then every 10 seconds after that.
 310                 timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 10000L, 10000L);
 311
 312                 // Listen for GPS and Network position updates
 313                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 314
 315                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
 316
 317                 String address = AltosDroidPreferences.active_device();
 318                 if (address != null)
 319                         startAltosBluetooth(address);
 320         }
 321
 322         @Override
 323         public int onStartCommand(Intent intent, int flags, int startId) {
 324                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 325
 326                 CharSequence text = getText(R.string.telemetry_service_started);
 327
 328                 // Create notification to be displayed while the service runs
 329                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 330
 331                 // The PendingIntent to launch our activity if the user selects this notification
 332                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 333                                 new Intent(this, AltosDroid.class), 0);
 334
 335                 // Set the info for the views that show in the notification panel.
 336                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 337
 338                 // Set the notification to be in the "Ongoing" section.
 339                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 340
 341                 // Move us into the foreground.
 342                 startForeground(NOTIFICATION, notification);
 343
 344                 // We want this service to continue running until it is explicitly
 345                 // stopped, so return sticky.
 346                 return START_STICKY;
 347         }
 348
 349         @Override
 350         public void onDestroy() {
 351
 352                 // Stop listening for location updates
 353                 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
 354
 355                 // Stop the bluetooth Comms threads
 356                 stopAltosBluetooth();
 357
 358                 // Demote us from the foreground, and cancel the persistent notification.
 359                 stopForeground(true);
 360
 361                 // Stop our timer
 362                 if (timer != null) {timer.cancel();}
 363
 364                 // Tell the user we stopped.
 365                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 366         }
 367
 368         @Override
 369         public IBinder onBind(Intent intent) {
 370                 return mMessenger.getBinder();
 371         }
 372
 373
 374         public void onLocationChanged(Location location) {
 375                 telemetry_state.location = location;
 376                 if (D) Log.d(TAG, "location changed");
 377                 sendMessageToClients();
 378         }
 379
 380         public void onStatusChanged(String provider, int status, Bundle extras) {
 381         }
 382
 383         public void onProviderEnabled(String provider) {
 384         }
 385
 386         public void onProviderDisabled(String provider) {
 387         }
 388
 389 }