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 // Need the following import to get access to the app resources, since this
  40 // class is in a sub-package.
  41 //import org.altusmetrum.AltosDroid.R;
  42
  43 import org.altusmetrum.AltosLib.*;
  44
  45 public class TelemetryService extends Service {
  46
  47         private static final String TAG = "TelemetryService";
  48         private static final boolean D = true;
  49
  50         static final int MSG_REGISTER_CLIENT   = 1;
  51         static final int MSG_UNREGISTER_CLIENT = 2;
  52         static final int MSG_CONNECT           = 3;
  53         static final int MSG_CONNECTED         = 4;
  54
  55         public static final int STATE_NONE       = 0;
  56         public static final int STATE_READY      = 1;
  57         public static final int STATE_CONNECTING = 2;
  58         public static final int STATE_CONNECTED  = 3;
  59
  60         // Key names received from the TelemetryService Handler
  61         public static final String KEY_DEVNAME = "key_devname";
  62         public static final String KEY_TOAST   = "key_toast";
  63
  64         // Unique Identification Number for the Notification.
  65         // We use it on Notification start, and to cancel it.
  66         private int NOTIFICATION = R.string.telemetry_service_label;
  67         //private NotificationManager mNM;
  68
  69         ArrayList<Messenger> mClients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  70         final Handler   mHandler   = new IncomingHandler(this);
  71         final Messenger mMessenger = new Messenger(mHandler); // Target we publish for clients to send messages to IncomingHandler.
  72
  73         // Name of the connected device
  74         private String mConnectedDeviceName = null;
  75         private AltosBluetooth mAltosBluetooth = null;
  76         private int state = STATE_NONE;
  77         LinkedBlockingQueue<AltosLine> telem;
  78
  79         // Handler of incoming messages from clients.
  80         static class IncomingHandler extends Handler {
  81                 private final WeakReference<TelemetryService> service;
  82                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
  83
  84                 @Override
  85                 public void handleMessage(Message msg) {
  86                         TelemetryService s = service.get();
  87                         switch (msg.what) {
  88                         case MSG_REGISTER_CLIENT:
  89                                 s.mClients.add(msg.replyTo);
  90                                 try {
  91                                         msg.replyTo.send(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, s.state, -1));
  92                                 } catch (RemoteException e) {
  93                                         s.mClients.remove(msg.replyTo);
  94                                 }
  95                                 if (D) Log.d(TAG, "Client bound to service");
  96                                 break;
  97                         case MSG_UNREGISTER_CLIENT:
  98                                 s.mClients.remove(msg.replyTo);
  99                                 if (D) Log.d(TAG, "Client unbound from service");
 100                                 break;
 101                         case MSG_CONNECT:
 102                                 if (D) Log.d(TAG, "Connect command received");
 103                                 s.startAltosBluetooth((BluetoothDevice) msg.obj);
 104                                 break;
 105                         case MSG_CONNECTED:
 106                                 if (D) Log.d(TAG, "Connected to device");
 107                                 s.mConnectedDeviceName = msg.getData().getString(KEY_DEVNAME);
 108                                 Message m = Message.obtain(null, AltosDroid.MSG_DEVNAME);
 109                                 Bundle b = new Bundle();
 110                                 b.putString(AltosDroid.KEY_DEVNAME, s.mConnectedDeviceName);
 111                                 m.setData(b);
 112                                 s.sendMessageToClients(m);
 113                                 s.setState(STATE_CONNECTED);
 114                                 s.mAltosBluetooth.add_monitor(s.telem);
 115                                 break;
 116                         default:
 117                                 super.handleMessage(msg);
 118                         }
 119                 }
 120         }
 121
 122         private void sendMessageToClients(Message m) {
 123                 for (int i=mClients.size()-1; i>=0; i--) {
 124                         try {
 125                                 mClients.get(i).send(m);
 126                         } catch (RemoteException e) {
 127                                 mClients.remove(i);
 128                         }
 129                 }
 130         }
 131
 132         private void stopAltosBluetooth() {
 133                 if (D) Log.i(TAG, "Stopping BT");
 134                 setState(STATE_READY);
 135                 if (mAltosBluetooth != null) {
 136                         if (D) Log.i(TAG, "Closing AltosBluetooth");
 137                         mAltosBluetooth.close();
 138                         mAltosBluetooth = null;
 139                 }
 140                 telem.clear();
 141         }
 142
 143         private void startAltosBluetooth(BluetoothDevice d) {
 144                         if (D) Log.i(TAG, "Connecting to " + d.getName());
 145                         mAltosBluetooth = new AltosBluetooth(d, mHandler);
 146                         setState(STATE_CONNECTING);
 147         }
 148
 149         private synchronized void setState(int s) {
 150                 if (D) Log.d(TAG, "setState() " + state + " -> " + s);
 151                 state = s;
 152
 153                 sendMessageToClients(Message.obtain(null, AltosDroid.MSG_STATE_CHANGE, state, -1));
 154         }
 155
 156         @Override
 157         public void onCreate() {
 158                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 159                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 160
 161                 telem = new LinkedBlockingQueue<AltosLine>();
 162                 setState(STATE_READY);
 163         }
 164
 165         @Override
 166         public int onStartCommand(Intent intent, int flags, int startId) {
 167                 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
 168
 169                 CharSequence text = getText(R.string.telemetry_service_started);
 170
 171                 // Create notification to be displayed while the service runs
 172                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 173
 174                 // The PendingIntent to launch our activity if the user selects this notification
 175                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 176                                 new Intent(this, AltosDroid.class), 0);
 177
 178                 // Set the info for the views that show in the notification panel.
 179                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 180
 181                 // Set the notification to be in the "Ongoing" section.
 182                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 183
 184                 // Move us into the foreground.
 185                 startForeground(NOTIFICATION, notification);
 186
 187                 // We want this service to continue running until it is explicitly
 188                 // stopped, so return sticky.
 189                 return START_STICKY;
 190         }
 191
 192         @Override
 193         public void onDestroy() {
 194
 195                 // Stop the bluetooth Comms threads
 196                 stopAltosBluetooth();
 197
 198                 // Demote us from the foreground, and cancel the persistent notification.
 199                 stopForeground(true);
 200
 201                 // Tell the user we stopped.
 202                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 203         }
 204
 205         @Override
 206         public IBinder onBind(Intent intent) {
 207                 return mMessenger.getBinder();
 208         }
 209
 210
 211 }