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();
102 case MSG_REGISTER_CLIENT:
103 s.mClients.add(msg.replyTo);
105 // Now we try to send the freshly connected UI any relavant information about what
107 msg.replyTo.send(s.message());
108 } catch (RemoteException e) {
109 s.mClients.remove(msg.replyTo);
111 if (D) Log.d(TAG, "Client bound to service");
113 case MSG_UNREGISTER_CLIENT:
114 s.mClients.remove(msg.replyTo);
115 if (D) Log.d(TAG, "Client unbound from service");
118 if (D) Log.d(TAG, "Connect command received");
119 String address = (String) msg.obj;
120 AltosDroidPreferences.set_active_device(address);
121 s.startAltosBluetooth(address);
124 if (D) Log.d(TAG, "Connected to device");
127 } catch (InterruptedException ie) {
130 case MSG_CONNECT_FAILED:
131 if (D) Log.d(TAG, "Connection failed... retrying");
132 if (s.address != null)
133 s.startAltosBluetooth(s.address);
135 case MSG_DISCONNECTED:
136 Log.d(TAG, "MSG_DISCONNECTED");
137 s.stopAltosBluetooth();
140 // forward telemetry messages
141 s.telemetry_state.state = (AltosState) msg.obj;
142 if (D) Log.d(TAG, "MSG_TELEMETRY");
143 s.sendMessageToClients();
146 // forward crc error messages
147 s.telemetry_state.crc_errors = (Integer) msg.obj;
148 if (D) Log.d(TAG, "MSG_CRC_ERROR");
149 s.sendMessageToClients();
151 case MSG_SETFREQUENCY:
152 if (D) Log.d(TAG, "MSG_SETFREQUENCY");
153 s.telemetry_state.frequency = (Double) msg.obj;
154 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
156 s.mAltosBluetooth.set_radio_frequency(s.telemetry_state.frequency);
157 s.mAltosBluetooth.save_frequency();
158 } catch (InterruptedException e) {
159 } catch (TimeoutException e) {
162 s.sendMessageToClients();
165 if (D) Log.d(TAG, "MSG_SETBAUD");
166 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
167 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
168 s.mAltosBluetooth.set_telemetry_rate(s.telemetry_state.telemetry_rate);
169 s.mAltosBluetooth.save_telemetry_rate();
171 s.sendMessageToClients();
174 super.handleMessage(msg);
179 private Message message() {
180 if (telemetry_state == null)
181 Log.d(TAG, "telemetry_state null!");
182 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
185 private void sendMessageToClients() {
186 Message m = message();
187 if (D) Log.d(TAG, String.format("Send message to %d clients", mClients.size()));
188 for (int i=mClients.size()-1; i>=0; i--) {
190 if (D) Log.d(TAG, String.format("Send message to client %d", i));
191 mClients.get(i).send(m);
192 } catch (RemoteException e) {
198 private void stopAltosBluetooth() {
199 if (D) Log.d(TAG, "stopAltosBluetooth(): begin");
200 telemetry_state.connect = TelemetryState.CONNECT_READY;
201 if (mTelemetryReader != null) {
202 if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryReader");
203 mTelemetryReader.interrupt();
205 mTelemetryReader.join();
206 } catch (InterruptedException e) {
208 mTelemetryReader = null;
210 if (mTelemetryLogger != null) {
211 if (D) Log.d(TAG, "stopAltosBluetooth(): stopping TelemetryLogger");
212 mTelemetryLogger.stop();
213 mTelemetryLogger = null;
215 if (mAltosBluetooth != null) {
216 if (D) Log.d(TAG, "stopAltosBluetooth(): stopping AltosBluetooth");
217 mAltosBluetooth.close();
218 mAltosBluetooth = null;
220 telemetry_state.config = null;
221 if (D) Log.d(TAG, "stopAltosBluetooth(): send message to clients");
222 sendMessageToClients();
225 private void startAltosBluetooth(String address) {
226 // Get the BLuetoothDevice object
227 BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
229 this.address = address;
230 if (mAltosBluetooth == null) {
231 if (D) Log.d(TAG, String.format("startAltosBluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress()));
232 mAltosBluetooth = new AltosBluetooth(device, mHandler);
233 telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
234 sendMessageToClients();
236 // This is a bit of a hack - if it appears we're still connected, we treat this as a restart.
237 // So, to give a suitable delay to teardown/bringup, we just schedule a resend of a message
238 // to ourselves in a few seconds time that will ultimately call this method again.
239 // ... then we tear down the existing connection.
240 // We do it this way around so that we don't lose a reference to the device when this method
241 // is called on reception of MSG_CONNECT_FAILED in the handler above.
242 mHandler.sendMessageDelayed(Message.obtain(null, MSG_CONNECT, address), 3000);
243 stopAltosBluetooth();
247 private void connected() throws InterruptedException {
248 if (D) Log.d(TAG, "connected top");
250 if (mAltosBluetooth == null)
251 throw new InterruptedException("no bluetooth");
252 telemetry_state.config = mAltosBluetooth.config_data();
253 mAltosBluetooth.set_radio_frequency(telemetry_state.frequency);
254 mAltosBluetooth.set_telemetry_rate(telemetry_state.telemetry_rate);
255 } catch (TimeoutException e) {
256 // If this timed out, then we really want to retry it, but
257 // probably safer to just retry the connection from scratch.
258 mHandler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
262 if (D) Log.d(TAG, "connected bluetooth configured");
263 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
265 mTelemetryReader = new TelemetryReader(mAltosBluetooth, mHandler);
266 mTelemetryReader.start();
268 if (D) Log.d(TAG, "connected TelemetryReader started");
270 mTelemetryLogger = new TelemetryLogger(this, mAltosBluetooth);
272 if (D) Log.d(TAG, "Notify UI of connection");
274 sendMessageToClients();
277 private void onTimerTick() {
278 if (D) Log.d(TAG, "Timer wakeup");
280 if (mClients.size() <= 0 && telemetry_state.connect != TelemetryState.CONNECT_CONNECTED) {
283 } catch (Throwable t) {
284 Log.e(TAG, "Timer failed: ", t);
290 public void onCreate() {
291 // Get local Bluetooth adapter
292 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
294 // If the adapter is null, then Bluetooth is not supported
295 if (mBluetoothAdapter == null) {
296 Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
299 // Initialise preferences
300 AltosDroidPreferences.init(this);
302 telemetry_state = new TelemetryState();
304 // Create a reference to the NotificationManager so that we can update our notifcation text later
305 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
307 telemetry_state.connect = TelemetryState.CONNECT_READY;
309 // Start our timer - first event in 10 seconds, then every 10 seconds after that.
310 timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 10000L, 10000L);
312 // Listen for GPS and Network position updates
313 LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
315 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, this);
317 String address = AltosDroidPreferences.active_device();
319 startAltosBluetooth(address);
323 public int onStartCommand(Intent intent, int flags, int startId) {
324 Log.i("TelemetryService", "Received start id " + startId + ": " + intent);
326 CharSequence text = getText(R.string.telemetry_service_started);
328 // Create notification to be displayed while the service runs
329 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
331 // The PendingIntent to launch our activity if the user selects this notification
332 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
333 new Intent(this, AltosDroid.class), 0);
335 // Set the info for the views that show in the notification panel.
336 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
338 // Set the notification to be in the "Ongoing" section.
339 notification.flags |= Notification.FLAG_ONGOING_EVENT;
341 // Move us into the foreground.
342 startForeground(NOTIFICATION, notification);
344 // We want this service to continue running until it is explicitly
345 // stopped, so return sticky.
350 public void onDestroy() {
352 // Stop listening for location updates
353 ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
355 // Stop the bluetooth Comms threads
356 stopAltosBluetooth();
358 // Demote us from the foreground, and cancel the persistent notification.
359 stopForeground(true);
362 if (timer != null) {timer.cancel();}
364 // Tell the user we stopped.
365 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
369 public IBinder onBind(Intent intent) {
370 return mMessenger.getBinder();
374 public void onLocationChanged(Location location) {
375 telemetry_state.location = location;
376 if (D) Log.d(TAG, "location changed");
377 sendMessageToClients();
380 public void onStatusChanged(String provider, int status, Bundle extras) {
383 public void onProviderEnabled(String provider) {
386 public void onProviderDisabled(String provider) {