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.Bundle;
  31 import android.os.IBinder;
  32 import android.os.Handler;
  33 import android.os.Message;
  34 import android.os.Messenger;
  35 import android.os.RemoteException;
  36 import android.util.Log;
  37 import android.widget.Toast;
  38
  39 import org.altusmetrum.AltosLib.*;
  40
  41 public class TelemetryService extends Service {
  42
  43         private static final String TAG = "TelemetryService";
  44         private static final boolean D = true;
  45
  46         static final int MSG_REGISTER_CLIENT   = 1;
  47         static final int MSG_UNREGISTER_CLIENT = 2;
  48         static final int MSG_CONNECT           = 3;
  49         static final int MSG_CONNECTED         = 4;
  50         static final int MSG_CONNECT_FAILED    = 5;
  51         static final int MSG_DISCONNECTED      = 6;
  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 BluetoothDevice device = 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_DEVNAME, s.device.getName()));
  86                                         msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, s.state, -1));
  87                                 } catch (RemoteException e) {
  88                                         s.mClients.remove(msg.replyTo);
  89                                 }
  90                                 if (D) Log.d(TAG, "Client bound to service");
  91                                 break;
  92                         case MSG_UNREGISTER_CLIENT:
  93                                 s.mClients.remove(msg.replyTo);
  94                                 if (D) Log.d(TAG, "Client unbound from service");
  95                                 break;
  96                         case MSG_CONNECT:
  97                                 if (D) Log.d(TAG, "Connect command received");
  98                                 s.device = (BluetoothDevice) msg.obj;
  99                                 s.startAltosBluetooth();
 100                                 break;
 101                         case MSG_CONNECTED:
 102                                 if (D) Log.d(TAG, "Connected to device");
 103                                 s.sendMessageToClients(Message.obtain(null, AltosDroid.MSG_DEVNAME, s.device.getName()));
 104                                 s.setState(STATE_CONNECTED);
 105                                 s.mAltosBluetooth.add_monitor(s.telem);
 106                                 break;
 107                         case MSG_CONNECT_FAILED:
 108                                 if (D) Log.d(TAG, "Connection failed... retrying");
 109                                 s.startAltosBluetooth();
 110                                 break;
 111                         case MSG_DISCONNECTED:
 112                                 if (D) Log.d(TAG, "Disconnected from " + s.device.getName());
 113                                 s.stopAltosBluetooth();
 114                                 break;
 115                         default:
 116                                 super.handleMessage(msg);
 117                         }
 118                 }
 119         }
 120
 121         private void sendMessageToClients(Message m) {
 122                 for (int i=mClients.size()-1; i>=0; i--) {
 123                         try {
 124                                 mClients.get(i).send(m);
 125                         } catch (RemoteException e) {
 126                                 mClients.remove(i);
 127                         }
 128                 }
 129         }
 130
 131         private void stopAltosBluetooth() {
 132                 if (D) Log.i(TAG, "Stopping BT");
 133                 setState(STATE_READY);
 134                 if (mAltosBluetooth != null) {
 135                         if (D) Log.i(TAG, "Closing AltosBluetooth");
 136                         mAltosBluetooth.close();
 137                         mAltosBluetooth = null;
 138                 }
 139                 device = null;
 140                 telem.clear();
 141         }
 142
 143         private void startAltosBluetooth() {
 144                 if (mAltosBluetooth == null) {
 145                         if (D) Log.i(TAG, "Connecting to " + device.getName());
 146                         mAltosBluetooth = new AltosBluetooth(device, mHandler);
 147                         setState(STATE_CONNECTING);
 148                 } else {
 149                         stopAltosBluetooth();
 150                         mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, device), 1000);
 151                 }
 152         }
 153
 154         private synchronized void setState(int s) {
 155                 if (D) Log.d(TAG, "setState() " + state + " -> " + s);
 156                 state = s;
 157
 158                 sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1));
 159         }
 160
 161         @Override
 162         public void onCreate() {
 163                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 164                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 165
 166                 telem = new LinkedBlockingQueue<AltosLine>();
 167                 setState(STATE_READY);
 168         }
 169
 170         @Override
 171         public int onStartCommand(Intent intent, int flags, int startId) {
 172                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 173
 174                 CharSequence text = getText(R.string.telemetry_service_started);
 175
 176                 // Create notification to be displayed while the service runs
 177                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 178
 179                 // The PendingIntent to launch our activity if the user selects this notification
 180                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 181                                 new Intent(this, AltosDroid.class), 0);
 182
 183                 // Set the info for the views that show in the notification panel.
 184                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 185
 186                 // Set the notification to be in the "Ongoing" section.
 187                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 188
 189                 // Move us into the foreground.
 190                 startForeground(NOTIFICATION, notification);
 191
 192                 // We want this service to continue running until it is explicitly
 193                 // stopped, so return sticky.
 194                 return START_STICKY;
 195         }
 196
 197         @Override
 198         public void onDestroy() {
 199
 200                 // Stop the bluetooth Comms threads
 201                 stopAltosBluetooth();
 202
 203                 // Demote us from the foreground, and cancel the persistent notification.
 204                 stopForeground(true);
 205
 206                 // Tell the user we stopped.
 207                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 208         }
 209
 210         @Override
 211         public IBinder onBind(Intent intent) {
 212                 return mMessenger.getBinder();
 213         }
 214
 215
 216 }