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.content.Intent;
  32 import android.content.Context;
  33 import android.os.Bundle;
  34 import android.os.IBinder;
  35 import android.os.Handler;
  36 import android.os.Message;
  37 import android.os.Messenger;
  38 import android.os.RemoteException;
  39 import android.util.Log;
  40 import android.widget.Toast;
  41 import android.location.Location;
  42 import android.location.LocationManager;
  43 import android.location.LocationListener;
  44
  45 import org.altusmetrum.altoslib_1.*;
  46
  47 class AltosLocationListener implements LocationListener {
  48         TelemetryService service;
  49         boolean fine;
  50
  51         public void onLocationChanged(Location location) {
  52                 service.sendLocation(location);
  53         }
  54
  55         public void onStatusChanged(String provider, int status, Bundle extras) {
  56         }
  57
  58         public void onProviderEnabled(String provider) {
  59         }
  60
  61         public void onProviderDisabled(String provider) {
  62         }
  63
  64         public AltosLocationListener(TelemetryService service, boolean fine) {
  65                 this.fine = fine;
  66                 this.service = service;
  67         }
  68 }
  69
  70 public class TelemetryService extends Service {
  71
  72         private static final String TAG = "TelemetryService";
  73         private static final boolean D = true;
  74
  75         static final int MSG_REGISTER_CLIENT   = 1;
  76         static final int MSG_UNREGISTER_CLIENT = 2;
  77         static final int MSG_CONNECT           = 3;
  78         static final int MSG_CONNECTED         = 4;
  79         static final int MSG_CONNECT_FAILED    = 5;
  80         static final int MSG_DISCONNECTED      = 6;
  81         static final int MSG_TELEMETRY         = 7;
  82         static final int MSG_SETFREQUENCY      = 8;
  83         static final int MSG_LOCATION          = 9;
  84         static final int MSG_CRC_ERROR         = 10;
  85
  86         public static final int STATE_NONE       = 0;
  87         public static final int STATE_READY      = 1;
  88         public static final int STATE_CONNECTING = 2;
  89         public static final int STATE_CONNECTED  = 3;
  90
  91         // Unique Identification Number for the Notification.
  92         // We use it on Notification start, and to cancel it.
  93         private int NOTIFICATION = R.string.telemetry_service_label;
  94         //private NotificationManager mNM;
  95
  96         // Timer - we wake up every now and then to decide if the service should stop
  97         private Timer timer = new Timer();
  98
  99         ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
 100         final Handler   mHandler   = new IncomingHandler(this);
 101         final Messenger mMessenger = new Messenger(mHandler); // Target we publish for clients to send messages to IncomingHandler.
 102
 103         // Name of the connected device
 104         private BluetoothDevice device           = null;
 105         private AltosBluetooth  mAltosBluetooth  = null;
 106         private AltosConfigData mConfigData      = null;
 107         private TelemetryReader mTelemetryReader = null;
 108         private TelemetryLogger mTelemetryLogger = null;
 109
 110         // internally track state of bluetooth connection
 111         private int state = STATE_NONE;
 112
 113         // location listeners
 114
 115         private AltosLocationListener gpsListener;
 116         private AltosLocationListener netListener;
 117
 118         // Last data seen; send to UI when it starts
 119
 120         private AltosState last_state;
 121         private Location last_location;
 122         private int last_crc_errors;
 123
 124         // Handler of incoming messages from clients.
 125         static class IncomingHandler extends Handler {
 126                 private final WeakReference<TelemetryService> service;
 127                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
 128
 129                 @Override
 130                 public void handleMessage(Message msg) {
 131                         TelemetryService s = service.get();
 132                         switch (msg.what) {
 133                         case MSG_REGISTER_CLIENT:
 134                                 s.mClients.add(msg.replyTo);
 135                                 try {
 136                                         // Now we try to send the freshly connected UI any relavant information about what
 137                                         // we're talking to - Basically state and Config Data.
 138                                         msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, s.state, -1, s.mConfigData));
 139                                 } catch (RemoteException e) {
 140                                         s.mClients.remove(msg.replyTo);
 141                                 }
 142                                 if (D) Log.d(TAG, "Client bound to service");
 143                                 if (s.last_state != null)
 144                                         s.sendTelemetry(s.last_state);
 145                                 if (s.last_location != null)
 146                                         s.sendLocation(s.last_location);
 147                                 if (s.last_crc_errors != 0)
 148                                         s.sendCrcErrors(s.last_crc_errors);
 149                                 break;
 150                         case MSG_UNREGISTER_CLIENT:
 151                                 s.mClients.remove(msg.replyTo);
 152                                 if (D) Log.d(TAG, "Client unbound from service");
 153                                 break;
 154                         case MSG_CONNECT:
 155                                 if (D) Log.d(TAG, "Connect command received");
 156                                 s.device = (BluetoothDevice) msg.obj;
 157                                 s.startAltosBluetooth();
 158                                 break;
 159                         case MSG_CONNECTED:
 160                                 if (D) Log.d(TAG, "Connected to device");
 161                                 s.connected();
 162                                 break;
 163                         case MSG_CONNECT_FAILED:
 164                                 if (D) Log.d(TAG, "Connection failed... retrying");
 165                                 s.startAltosBluetooth();
 166                                 break;
 167                         case MSG_DISCONNECTED:
 168                                 // Only do the following if we haven't been shutdown elsewhere..
 169                                 if (s.device != null) {
 170                                         if (D) Log.d(TAG, "Disconnected from " + s.device.getName());
 171                                         s.stopAltosBluetooth();
 172                                 }
 173                                 break;
 174                         case MSG_TELEMETRY:
 175                                 s.sendMessageToClients(Message.obtain(null, AltosDroid.MSG_TELEMETRY, msg.obj));
 176                                 break;
 177                         case MSG_SETFREQUENCY:
 178                                 if (s.state == STATE_CONNECTED) {
 179                                         try {
 180                                                 s.mAltosBluetooth.set_radio_frequency((Double) msg.obj);
 181                                         } catch (InterruptedException e) {
 182                                         } catch (TimeoutException e) {
 183                                         }
 184                                 }
 185                                 break;
 186                         default:
 187                                 super.handleMessage(msg);
 188                         }
 189                 }
 190         }
 191
 192         public void sendTelemetry(AltosState state) {
 193                 last_state = state;
 194                 mHandler.obtainMessage(MSG_TELEMETRY, state).sendToTarget();
 195         }
 196
 197         public void sendLocation(Location location) {
 198                 last_location = location;
 199                 mHandler.obtainMessage(MSG_LOCATION, location).sendToTarget();
 200         }
 201
 202         public void sendCrcErrors(int crc_errors) {
 203                 last_crc_errors = crc_errors;
 204                 mHandler.obtainMessage(MSG_CRC_ERROR, new Integer(crc_errors)).sendToTarget();
 205         }
 206
 207         private void sendMessageToClients(Message m) {
 208                 for (int i=mClients.size()-1; i>=0; i--) {
 209                         try {
 210                                 mClients.get(i).send(m);
 211                         } catch (RemoteException e) {
 212                                 mClients.remove(i);
 213                         }
 214                 }
 215         }
 216
 217         private void stopAltosBluetooth() {
 218                 if (D) Log.d(TAG, "stopAltosBluetooth(): begin");
 219                 setState(STATE_READY);
 220                 if (mTelemetryReader != null) {
 221                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryReader");
 222                         mTelemetryReader.interrupt();
 223                         try {
 224                                 mTelemetryReader.join();
 225                         } catch (InterruptedException e) {
 226                         }
 227                         mTelemetryReader = null;
 228                 }
 229                 if (mTelemetryLogger != null) {
 230                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryLogger");
 231                         mTelemetryLogger.stop();
 232                         mTelemetryLogger = null;
 233                 }
 234                 if (mAltosBluetooth != null) {
 235                         if (D) Log.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth");
 236                         mAltosBluetooth.close();
 237                         mAltosBluetooth = null;
 238                 }
 239                 device = null;
 240                 mConfigData = null;
 241         }
 242
 243         private void startAltosBluetooth() {
 244                 if (mAltosBluetooth == null) {
 245                         if (D) Log.d(TAG, String.format("startAltosBluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
 246                         mAltosBluetooth = new AltosBluetooth(device, mHandler);
 247                         setState(STATE_CONNECTING);
 248                 } else {
 249                         // This is a bit of a hack - if it appears we're still connected, we treat this as a restart.
 250                         // So, to give a suitable delay to teardown/bringup, we just schedule a resend of a message
 251                         // to ourselves in a few seconds time that will ultimately call this method again.
 252                         // ... then we tear down the existing connection.
 253                         // We do it this way around so that we don't lose a reference to the device when this method
 254                         // is called on reception of MSG_CONNECT_FAILED in the handler above.
 255                         mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, device), 3000);
 256                         stopAltosBluetooth();
 257                 }
 258         }
 259
 260         private synchronized void setState(int s) {
 261                 if (D) Log.d(TAG, "setState(): " + state + " -> " + s);
 262                 state = s;
 263
 264                 // This shouldn't be required - mConfigData should be null for any non-connected
 265                 // state, but to be safe and to reduce message size
 266                 AltosConfigData acd = (state == STATE_CONNECTED) ? mConfigData : null;
 267
 268                 sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1, acd));
 269         }
 270
 271         private void connected() {
 272                 try {
 273                         mConfigData = mAltosBluetooth.config_data();
 274                 } catch (InterruptedException e) {
 275                 } catch (TimeoutException e) {
 276                         // If this timed out, then we really want to retry it, but
 277                         // probably safer to just retry the connection from scratch.
 278                         mHandler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 279                         return;
 280                 }
 281
 282                 setState(STATE_CONNECTED);
 283
 284                 mTelemetryReader = new TelemetryReader(this, mAltosBluetooth, mHandler);
 285                 mTelemetryReader.start();
 286
 287                 mTelemetryLogger = new TelemetryLogger(this, mAltosBluetooth);
 288         }
 289
 290
 291         private void onTimerTick() {
 292                 if (D) Log.d(TAG, "Timer wakeup");
 293                 try {
 294                         if (mClients.size() <= 0 && state != STATE_CONNECTED) {
 295                                 stopSelf();
 296                         }
 297                 } catch (Throwable t) {
 298                         Log.e(TAG, "Timer failed: ", t);
 299                 }
 300         }
 301
 302
 303         @Override
 304         public void onCreate() {
 305                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 306                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 307
 308                 setState(STATE_READY);
 309
 310                 // Start our timer - first event in 10 seconds, then every 10 seconds after that.
 311                 timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 10000L, 10000L);
 312
 313                 // Listen for GPS and Network position updates
 314                 gpsListener = new AltosLocationListener(this, true);
 315                 netListener = new AltosLocationListener(this, false);
 316
 317                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 318
 319                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, gpsListener);
 320                 locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, netListener);
 321         }
 322
 323         @Override
 324         public int onStartCommand(Intent intent, int flags, int startId) {
 325                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 326
 327                 CharSequence text = getText(R.string.telemetry_service_started);
 328
 329                 // Create notification to be displayed while the service runs
 330                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 331
 332                 // The PendingIntent to launch our activity if the user selects this notification
 333                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 334                                 new Intent(this, AltosDroid.class), 0);
 335
 336                 // Set the info for the views that show in the notification panel.
 337                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 338
 339                 // Set the notification to be in the "Ongoing" section.
 340                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 341
 342                 // Move us into the foreground.
 343                 startForeground(NOTIFICATION, notification);
 344
 345                 // We want this service to continue running until it is explicitly
 346                 // stopped, so return sticky.
 347                 return START_STICKY;
 348         }
 349
 350         @Override
 351         public void onDestroy() {
 352
 353                 // Stop listening for location updates
 354                 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 355                 locationManager.removeUpdates(gpsListener);
 356                 locationManager.removeUpdates(netListener);
 357
 358                 // Stop the bluetooth Comms threads
 359                 stopAltosBluetooth();
 360
 361                 // Demote us from the foreground, and cancel the persistent notification.
 362                 stopForeground(true);
 363
 364                 // Stop our timer
 365                 if (timer != null) {timer.cancel();}
 366
 367                 // Tell the user we stopped.
 368                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 369         }
 370
 371         @Override
 372         public IBinder onBind(Intent intent) {
 373                 return mMessenger.getBinder();
 374         }
 375
 376
 377 }