2 * Copyright © 2012 Mike Beattie <mike@ethernal.org>
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.
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.
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.
18 package org.altusmetrum.AltosDroid;
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;
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;
48 import org.altusmetrum.altoslib_5.*;
51 public class TelemetryService extends Service implements LocationListener {
53 private static final String TAG = "TelemetryService";
54 private static final boolean D = true;
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;
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;
72 // Timer - we wake up every now and then to decide if the service should stop
73 private Timer timer = new Timer();
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.
79 // Name of the connected device
81 private AltosBluetooth mAltosBluetooth = null;
82 private TelemetryReader mTelemetryReader = null;
83 private TelemetryLogger mTelemetryLogger = null;
84 // Local Bluetooth adapter
85 private BluetoothAdapter mBluetoothAdapter = null;
87 private TelemetryState telemetry_state;
89 // Last data seen; send to UI when it starts
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); }
97 public void handleMessage(Message msg) {
98 TelemetryService s = service.get();
100 case MSG_REGISTER_CLIENT:
101 s.mClients.add(msg.replyTo);
103 // Now we try to send the freshly connected UI any relavant information about what
105 msg.replyTo.send(s.message());
106 } catch (RemoteException e) {
107 s.mClients.remove(msg.replyTo);
109 if (D) Log.d(TAG, "Client bound to service");
111 case MSG_UNREGISTER_CLIENT:
112 s.mClients.remove(msg.replyTo);
113 if (D) Log.d(TAG, "Client unbound from service");
116 if (D) Log.d(TAG, "Connect command received");
117 String address = (String) msg.obj;
118 AltosDroidPreferences.set_active_device(address);
119 s.startAltosBluetooth(address);
122 if (D) Log.d(TAG, "Connected to device");
125 } catch (InterruptedException ie) {
128 case MSG_CONNECT_FAILED:
129 if (D) Log.d(TAG, "Connection failed... retrying");
130 if (s.address != null)
131 s.startAltosBluetooth(s.address);
133 case MSG_DISCONNECTED:
134 Log.d(TAG, "MSG_DISCONNECTED");
135 s.stopAltosBluetooth();
138 // forward telemetry messages
139 s.telemetry_state.state = (AltosState) msg.obj;
140 if (D) Log.d(TAG, "MSG_TELEMETRY");
141 s.sendMessageToClients();
144 // forward crc error messages
145 s.telemetry_state.crc_errors = (Integer) msg.obj;
146 if (D) Log.d(TAG, "MSG_CRC_ERROR");
147 s.sendMessageToClients();
149 case MSG_SETFREQUENCY:
150 if (D) Log.d(TAG, "MSG_SETFREQUENCY");
151 s.telemetry_state.frequency = (Double) msg.obj;
152 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
154 s.mAltosBluetooth.set_radio_frequency(s.telemetry_state.frequency);
155 s.mAltosBluetooth.save_frequency();
156 } catch (InterruptedException e) {
157 } catch (TimeoutException e) {
160 s.sendMessageToClients();
163 if (D) Log.d(TAG, "MSG_SETBAUD");
164 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
165 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
166 s.mAltosBluetooth.set_telemetry_rate(s.telemetry_state.telemetry_rate);
167 s.mAltosBluetooth.save_telemetry_rate();
169 s.sendMessageToClients();
172 super.handleMessage(msg);
177 private Message message() {
178 if (telemetry_state == null)
179 Log.d(TAG, "telemetry_state null!");
180 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
183 private void sendMessageToClients() {
184 Message m = message();
185 if (D) Log.d(TAG, String.format("Send message to %d clients", mClients.size()));
186 for (int i=mClients.size()-1; i>=0; i--) {
188 if (D) Log.d(TAG, String.format("Send message to client %d", i));
189 mClients.get(i).send(m);
190 } catch (RemoteException e) {
196 private void stopAltosBluetooth() {
197 if (D) Log.d(TAG, "stopAltosBluetooth(): begin");
198 telemetry_state.connect = TelemetryState.CONNECT_READY;
199 if (mTelemetryReader != null) {
200 if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryReader");
201 mTelemetryReader.interrupt();
203 mTelemetryReader.join();
204 } catch (InterruptedException e) {
206 mTelemetryReader = null;
208 if (mTelemetryLogger != null) {
209 if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryLogger");
210 mTelemetryLogger.stop();
211 mTelemetryLogger = null;
213 if (mAltosBluetooth != null) {
214 if (D) Log.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth");
215 mAltosBluetooth.close();
216 mAltosBluetooth = null;
218 telemetry_state.config = null;
219 if (D) Log.d(TAG, "stopAltosBluetooth(): send message to clients");
220 sendMessageToClients();
223 private void startAltosBluetooth(String address) {
224 // Get the BLuetoothDevice object
225 BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
227 this.address = address;
228 if (mAltosBluetooth == null) {
229 if (D) Log.d(TAG, String.format("startAltosBluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
230 mAltosBluetooth = new AltosBluetooth(device, mHandler);
231 telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
232 sendMessageToClients();
234 // This is a bit of a hack - if it appears we're still connected, we treat this as a restart.
235 // So, to give a suitable delay to teardown/bringup, we just schedule a resend of a message
236 // to ourselves in a few seconds time that will ultimately call this method again.
237 // ... then we tear down the existing connection.
238 // We do it this way around so that we don't lose a reference to the device when this method
239 // is called on reception of MSG_CONNECT_FAILED in the handler above.
240 mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, address), 3000);
241 stopAltosBluetooth();
245 private void connected() throws InterruptedException {
246 if (D) Log.d(TAG, "connected top");
248 if (mAltosBluetooth == null)
249 throw new InterruptedException("no bluetooth");
250 telemetry_state.config = mAltosBluetooth.config_data();
251 mAltosBluetooth.set_radio_frequency(telemetry_state.frequency);
252 mAltosBluetooth.set_telemetry_rate(telemetry_state.telemetry_rate);
253 } catch (TimeoutException e) {
254 // If this timed out, then we really want to retry it, but
255 // probably safer to just retry the connection from scratch.
256 mHandler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
260 if (D) Log.d(TAG, "connected bluetooth configured");
261 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
263 mTelemetryReader = new TelemetryReader(mAltosBluetooth, mHandler);
264 mTelemetryReader.start();
266 if (D) Log.d(TAG, "connected TelemetryReader started");
268 mTelemetryLogger = new TelemetryLogger(this, mAltosBluetooth);
270 if (D) Log.d(TAG, "Notify UI of connection");
272 sendMessageToClients();
275 private void onTimerTick() {
276 if (D) Log.d(TAG, "Timer wakeup");
278 if (mClients.size() <= 0 && telemetry_state.connect != TelemetryState.CONNECT_CONNECTED) {
281 } catch (Throwable t) {
282 Log.e(TAG, "Timer failed: ", t);
288 public void onCreate() {
289 // Get local Bluetooth adapter
290 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
292 // If the adapter is null, then Bluetooth is not supported
293 if (mBluetoothAdapter == null) {
294 Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
297 // Initialise preferences
298 AltosDroidPreferences.init(this);
300 telemetry_state = new TelemetryState();
302 // Create a reference to the NotificationManager so that we can update our notifcation text later
303 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
305 telemetry_state.connect = TelemetryState.CONNECT_READY;
307 // Start our timer - first event in 10 seconds, then every 10 seconds after that.
308 timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 10000L, 10000L);
310 // Listen for GPS and Network position updates
311 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
313 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
315 String address = AltosDroidPreferences.active_device();
317 startAltosBluetooth(address);
321 public int onStartCommand(Intent intent, int flags, int startId) {
322 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
324 CharSequence text = getText(R.string.telemetry_service_started);
326 // Create notification to be displayed while the service runs
327 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
329 // The PendingIntent to launch our activity if the user selects this notification
330 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
331 new Intent(this, AltosDroid.class), 0);
333 // Set the info for the views that show in the notification panel.
334 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
336 // Set the notification to be in the "Ongoing" section.
337 notification.flags |= Notification.FLAG_ONGOING_EVENT;
339 // Move us into the foreground.
340 startForeground(NOTIFICATION, notification);
342 // We want this service to continue running until it is explicitly
343 // stopped, so return sticky.
348 public void onDestroy() {
350 // Stop listening for location updates
351 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
353 // Stop the bluetooth Comms threads
354 stopAltosBluetooth();
356 // Demote us from the foreground, and cancel the persistent notification.
357 stopForeground(true);
360 if (timer != null) {timer.cancel();}
362 // Tell the user we stopped.
363 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
367 public IBinder onBind(Intent intent) {
368 return mMessenger.getBinder();
372 public void onLocationChanged(Location location) {
373 telemetry_state.location = location;
374 if (D) Log.d(TAG, "location changed");
375 sendMessageToClients();
378 public void onStatusChanged(String provider, int status, Bundle extras) {
381 public void onProviderEnabled(String provider) {
384 public void onProviderDisabled(String provider) {