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.LinkedBlockingQueue;
  23
  24 import android.app.Notification;
  25 //import android.app.NotificationManager;
  26 import android.app.PendingIntent;
  27 import android.app.Service;
  28 import android.bluetooth.BluetoothDevice;
  29 import android.content.Intent;
  30 import android.os.IBinder;
  31 import android.os.Handler;
  32 import android.os.Message;
  33 import android.os.Messenger;
  34 import android.util.Log;
  35 import android.widget.Toast;
  36
  37 // Need the following import to get access to the app resources, since this
  38 // class is in a sub-package.
  39 //import org.altusmetrum.AltosDroid.R;
  40
  41 import org.altusmetrum.AltosLib.*;
  42
  43 public class TelemetryService extends Service {
  44
  45         private static final String TAG = "TelemetryService";
  46         private static final boolean D = true;
  47
  48         static final int MSG_REGISTER_CLIENT   = 1;
  49         static final int MSG_UNREGISTER_CLIENT = 2;
  50         static final int MSG_CONNECT           = 3;
  51         static final int MSG_CONNECTED         = 4;
  52
  53         public static final int STATE_NONE       = 0;
  54         public static final int STATE_READY      = 1;
  55         public static final int STATE_CONNECTING = 2;
  56         public static final int STATE_CONNECTED  = 3;
  57
  58         // Unique Identification Number for the Notification.
  59         // We use it on Notification start, and to cancel it.
  60         private int NOTIFICATION = R.string.telemetry_service_label;
  61         //private NotificationManager mNM;
  62
  63         ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  64         final Handler   mHandler   = new IncomingHandler(this);
  65         final Messenger mMessenger = new Messenger(mHandler); // Target we publish for clients to send messages to IncomingHandler.
  66
  67         // Name of the connected device
  68         private String mConnectedDeviceName = null;
  69         private AltosBluetooth mAltosBluetooth = null;
  70         private int state = STATE_NONE;
  71         LinkedBlockingQueue<AltosLine> telem;
  72
  73         // Handler of incoming messages from clients.
  74         static class IncomingHandler extends Handler {
  75                 private final WeakReference<TelemetryService> service;
  76                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
  77
  78                 @Override
  79                 public void handleMessage(Message msg) {
  80                         TelemetryService s = service.get();
  81                         switch (msg.what) {
  82                         case MSG_REGISTER_CLIENT:
  83                                 s.mClients.add(msg.replyTo);
  84                                 try {
  85                                         msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, s.state, -1));
  86                                 } catch (RemoteException e) {
  87                                         s.mClients.remove(msg.replyTo);
  88                                 }
  89                                 if (D) Log.d(TAG, "Client bound to service");
  90                                 break;
  91                         case MSG_UNREGISTER_CLIENT:
  92                                 s.mClients.remove(msg.replyTo);
  93                                 if (D) Log.d(TAG, "Client unbound from service");
  94                                 break;
  95                         case MSG_CONNECT:
  96                                 if (D) Log.d(TAG, "Connect command received");
  97                                 s.startAltosBluetooth((BluetoothDevice) msg.obj);
  98                                 break;
  99                         case MSG_CONNECTED:
 100                                 if (D) Log.d(TAG, "Connected to device");
 101                                 s.setState(STATE_CONNECTED);
 102                                 s.mAltosBluetooth.add_monitor(s.telem);
 103                                 break;
 104                         default:
 105                                 super.handleMessage(msg);
 106                         }
 107                 }
 108         }
 109
 110         private void sendMessageToClients(Message m) {
 111                 for (int i=mClients.size()-1; i>=0; i--) {
 112                         try {
 113                                 mClients.get(i).send(m);
 114                         } catch (RemoteException e) {
 115                                 mClients.remove(i);
 116                         }
 117                 }
 118         }
 119
 120         private void stopAltosBluetooth() {
 121                 if (D) Log.i(TAG, "Stopping BT");
 122                 setState(STATE_READY);
 123                 if (mAltosBluetooth != null) {
 124                         if (D) Log.i(TAG, "Closing AltosBluetooth");
 125                         mAltosBluetooth.close();
 126                         mAltosBluetooth = null;
 127                 }
 128                 telem.clear();
 129         }
 130
 131         private void startAltosBluetooth(BluetoothDevice d) {
 132                         if (D) Log.i(TAG, "Connecting to " + d.getName());
 133                         mAltosBluetooth = new AltosBluetooth(d, mHandler);
 134                         setState(STATE_CONNECTING);
 135         }
 136
 137         private synchronized void setState(int s) {
 138                 if (D) Log.d(TAG, "setState() " + state + " -> " + s);
 139                 state = s;
 140
 141                 sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1));
 142         }
 143
 144         @Override
 145         public void onCreate() {
 146                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 147                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 148
 149                 telem = new LinkedBlockingQueue<AltosLine>();
 150                 setState(STATE_READY);
 151         }
 152
 153         @Override
 154         public int onStartCommand(Intent intent, int flags, int startId) {
 155                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 156
 157                 CharSequence text = getText(R.string.telemetry_service_started);
 158
 159                 // Create notification to be displayed while the service runs
 160                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 161
 162                 // The PendingIntent to launch our activity if the user selects this notification
 163                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 164                                 new Intent(this, AltosDroid.class), 0);
 165
 166                 // Set the info for the views that show in the notification panel.
 167                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 168
 169                 // Set the notification to be in the "Ongoing" section.
 170                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 171
 172                 // Move us into the foreground.
 173                 startForeground(NOTIFICATION, notification);
 174
 175                 // We want this service to continue running until it is explicitly
 176                 // stopped, so return sticky.
 177                 return START_STICKY;
 178         }
 179
 180         @Override
 181         public void onDestroy() {
 182
 183                 // Stop the bluetooth Comms threads
 184                 stopAltosBluetooth();
 185
 186                 // Demote us from the foreground, and cancel the persistent notification.
 187                 stopForeground(true);
 188
 189                 // Tell the user we stopped.
 190                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 191         }
 192
 193         @Override
 194         public IBinder onBind(Intent intent) {
 195                 return mMessenger.getBinder();
 196         }
 197
 198
 199 }