2 * Copyright (C) 2008 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.android.calendar;
19 import android.app.AlarmManager;
20 import android.app.Notification;
21 import android.app.NotificationManager;
22 import android.app.Service;
23 import android.content.ContentResolver;
24 import android.content.ContentValues;
25 import android.content.Context;
26 import android.content.Intent;
27 import android.content.SharedPreferences;
28 import android.database.Cursor;
29 import android.net.Uri;
30 import android.os.Bundle;
31 import android.os.Handler;
32 import android.os.HandlerThread;
33 import android.os.IBinder;
34 import android.os.Looper;
35 import android.os.Message;
36 import android.os.Process;
37 import android.preference.PreferenceManager;
38 import android.provider.Calendar;
39 import android.provider.Calendar.Attendees;
40 import android.provider.Calendar.CalendarAlerts;
41 import android.provider.Calendar.Instances;
42 import android.provider.Calendar.Reminders;
43 import android.text.TextUtils;
44 import android.text.format.DateUtils;
45 import android.util.Log;
46 import android.view.LayoutInflater;
47 import android.view.View;
50 * This service is used to handle calendar event reminders.
52 public class AlertService extends Service {
53 private static final String TAG = "AlertService";
55 private volatile Looper mServiceLooper;
56 private volatile ServiceHandler mServiceHandler;
58 private static final String[] ALERT_PROJECTION = new String[] {
59 CalendarAlerts._ID, // 0
60 CalendarAlerts.EVENT_ID, // 1
61 CalendarAlerts.STATE, // 2
62 CalendarAlerts.TITLE, // 3
63 CalendarAlerts.EVENT_LOCATION, // 4
64 CalendarAlerts.SELF_ATTENDEE_STATUS, // 5
65 CalendarAlerts.ALL_DAY, // 6
66 CalendarAlerts.ALARM_TIME, // 7
67 CalendarAlerts.MINUTES, // 8
68 CalendarAlerts.BEGIN, // 9
71 // We just need a simple projection that returns any column
72 private static final String[] ALERT_PROJECTION_SMALL = new String[] {
73 CalendarAlerts._ID, // 0
76 private static final int ALERT_INDEX_ID = 0;
77 private static final int ALERT_INDEX_EVENT_ID = 1;
78 private static final int ALERT_INDEX_STATE = 2;
79 private static final int ALERT_INDEX_TITLE = 3;
80 private static final int ALERT_INDEX_EVENT_LOCATION = 4;
81 private static final int ALERT_INDEX_SELF_ATTENDEE_STATUS = 5;
82 private static final int ALERT_INDEX_ALL_DAY = 6;
83 private static final int ALERT_INDEX_ALARM_TIME = 7;
84 private static final int ALERT_INDEX_MINUTES = 8;
85 private static final int ALERT_INDEX_BEGIN = 9;
87 private String[] INSTANCE_PROJECTION = { Instances.BEGIN, Instances.END };
88 private static final int INSTANCES_INDEX_BEGIN = 0;
89 private static final int INSTANCES_INDEX_END = 1;
91 // We just need a simple projection that returns any column
92 private static final String[] REMINDER_PROJECTION_SMALL = new String[] {
96 @SuppressWarnings("deprecation")
97 void processMessage(Message msg) {
98 Bundle bundle = (Bundle) msg.obj;
100 // On reboot, update the notification bar with the contents of the
101 // CalendarAlerts table.
102 String action = bundle.getString("action");
103 if (action.equals(Intent.ACTION_BOOT_COMPLETED)
104 || action.equals(Intent.ACTION_TIME_CHANGED)) {
109 // The Uri specifies an entry in the CalendarAlerts table
110 Uri alertUri = Uri.parse(bundle.getString("uri"));
111 if (Log.isLoggable(TAG, Log.DEBUG)) {
112 Log.d(TAG, "uri: " + alertUri);
115 if (alertUri != null) {
116 if (Calendar.AUTHORITY.equals(alertUri.getAuthority())) {
117 Log.w(TAG, "Invalid AUTHORITY uri: " + alertUri);
121 // Record the received time in the CalendarAlerts table.
122 // This is useful for finding bugs that cause alarms to be
123 // missed or delayed.
124 ContentValues values = new ContentValues();
125 values.put(CalendarAlerts.RECEIVED_TIME, System.currentTimeMillis());
126 getContentResolver().update(alertUri, values, null /* where */, null /* args */);
129 ContentResolver cr = getContentResolver();
130 Cursor alertCursor = cr.query(alertUri, ALERT_PROJECTION,
131 null /* selection */, null, null /* sort order */);
133 long alertId, eventId, alarmTime;
138 boolean declined = false;
140 if (alertCursor == null || !alertCursor.moveToFirst()) {
141 // This can happen if the event was deleted.
142 if (Log.isLoggable(TAG, Log.DEBUG)) {
143 Log.d(TAG, "alert not found");
147 alertId = alertCursor.getLong(ALERT_INDEX_ID);
148 eventId = alertCursor.getLong(ALERT_INDEX_EVENT_ID);
149 minutes = alertCursor.getInt(ALERT_INDEX_MINUTES);
150 eventName = alertCursor.getString(ALERT_INDEX_TITLE);
151 location = alertCursor.getString(ALERT_INDEX_EVENT_LOCATION);
152 allDay = alertCursor.getInt(ALERT_INDEX_ALL_DAY) != 0;
153 alarmTime = alertCursor.getLong(ALERT_INDEX_ALARM_TIME);
154 declined = alertCursor.getInt(ALERT_INDEX_SELF_ATTENDEE_STATUS) ==
155 Attendees.ATTENDEE_STATUS_DECLINED;
157 // If the event was declined, then mark the alarm DISMISSED,
158 // otherwise, mark the alarm FIRED.
159 int newState = CalendarAlerts.FIRED;
161 newState = CalendarAlerts.DISMISSED;
163 alertCursor.updateInt(ALERT_INDEX_STATE, newState);
164 alertCursor.commitUpdates();
166 if (alertCursor != null) {
171 // Do not show an alert if the event was declined
173 if (Log.isLoggable(TAG, Log.DEBUG)) {
174 Log.d(TAG, "event declined, alert cancelled");
179 long beginTime = bundle.getLong(Calendar.EVENT_BEGIN_TIME, 0);
180 long endTime = bundle.getLong(Calendar.EVENT_END_TIME, 0);
182 // Check if this alarm is still valid. The time of the event may
183 // have been changed, or the reminder may have been changed since
184 // this alarm was set. First, search for an instance in the Instances
185 // that has the same event id and the same begin and end time.
186 // Then check for a reminder in the Reminders table to ensure that
187 // the reminder minutes is consistent with this alarm.
188 String selection = Instances.EVENT_ID + "=" + eventId;
189 Cursor instanceCursor = Instances.query(cr, INSTANCE_PROJECTION,
190 beginTime, endTime, selection, Instances.DEFAULT_SORT_ORDER);
191 long instanceBegin = 0, instanceEnd = 0;
193 if (instanceCursor == null || !instanceCursor.moveToFirst()) {
194 // Delete this alarm from the CalendarAlerts table
195 cr.delete(alertUri, null /* selection */, null /* selection args */);
196 if (Log.isLoggable(TAG, Log.DEBUG)) {
197 Log.d(TAG, "instance not found, alert cancelled");
201 instanceBegin = instanceCursor.getLong(INSTANCES_INDEX_BEGIN);
202 instanceEnd = instanceCursor.getLong(INSTANCES_INDEX_END);
204 if (instanceCursor != null) {
205 instanceCursor.close();
209 // Check that a reminder for this event exists with the same number
210 // of minutes. But snoozed alarms have minutes = 0, so don't do this
211 // check for snoozed alarms.
213 selection = Reminders.EVENT_ID + "=" + eventId
214 + " AND " + Reminders.MINUTES + "=" + minutes;
215 Cursor reminderCursor = cr.query(Reminders.CONTENT_URI, REMINDER_PROJECTION_SMALL,
216 selection, null /* selection args */, null /* sort order */);
218 if (reminderCursor == null || reminderCursor.getCount() == 0) {
219 // Delete this alarm from the CalendarAlerts table
220 cr.delete(alertUri, null /* selection */, null /* selection args */);
221 if (Log.isLoggable(TAG, Log.DEBUG)) {
222 Log.d(TAG, "reminder not found, alert cancelled");
227 if (reminderCursor != null) {
228 reminderCursor.close();
233 // If the event time was changed and the event has already ended,
234 // then don't sound the alarm.
235 if (alarmTime > instanceEnd) {
236 // Delete this alarm from the CalendarAlerts table
237 cr.delete(alertUri, null /* selection */, null /* selection args */);
238 if (Log.isLoggable(TAG, Log.DEBUG)) {
239 Log.d(TAG, "event ended, alert cancelled");
244 // If minutes > 0, then this is a normal alarm (not a snoozed alarm)
245 // so check for duplicate alarms. A duplicate alarm can occur when
246 // the start time of an event is changed to an earlier time. The
247 // later alarm (that was first scheduled for the later event time)
248 // should be discarded.
249 long computedAlarmTime = instanceBegin - minutes * DateUtils.MINUTE_IN_MILLIS;
250 if (minutes > 0 && computedAlarmTime != alarmTime) {
251 // If the event time was changed to a later time, then the computed
252 // alarm time is in the future and we shouldn't sound this alarm.
253 if (computedAlarmTime > alarmTime) {
254 // Delete this alarm from the CalendarAlerts table
255 cr.delete(alertUri, null /* selection */, null /* selection args */);
256 if (Log.isLoggable(TAG, Log.DEBUG)) {
257 Log.d(TAG, "event postponed, alert cancelled");
262 // Check for another alarm in the CalendarAlerts table that has the
263 // same event id and the same "minutes". This can occur
264 // if the event start time was changed to an earlier time and the
265 // alarm for the later time goes off. To avoid discarding alarms
266 // for repeating events (that have the same event id), we check
267 // that the other alarm fired recently (within an hour of this one).
268 long recently = alarmTime - 60 * DateUtils.MINUTE_IN_MILLIS;
269 selection = CalendarAlerts.EVENT_ID + "=" + eventId
270 + " AND " + CalendarAlerts.TABLE_NAME + "." + CalendarAlerts._ID
272 + " AND " + CalendarAlerts.MINUTES + "=" + minutes
273 + " AND " + CalendarAlerts.ALARM_TIME + ">" + recently
274 + " AND " + CalendarAlerts.ALARM_TIME + "<=" + alarmTime;
275 alertCursor = CalendarAlerts.query(cr, ALERT_PROJECTION_SMALL, selection, null);
276 if (alertCursor != null) {
278 if (alertCursor.getCount() > 0) {
279 // Delete this alarm from the CalendarAlerts table
280 cr.delete(alertUri, null /* selection */, null /* selection args */);
281 if (Log.isLoggable(TAG, Log.DEBUG)) {
282 Log.d(TAG, "duplicate alarm, alert cancelled");
292 // Find all the alerts that have fired but have not been dismissed
293 selection = CalendarAlerts.STATE + "=" + CalendarAlerts.FIRED;
294 alertCursor = CalendarAlerts.query(cr, ALERT_PROJECTION, selection, null);
296 if (alertCursor == null || alertCursor.getCount() == 0) {
297 if (Log.isLoggable(TAG, Log.DEBUG)) {
298 Log.d(TAG, "no fired alarms found");
303 int numReminders = alertCursor.getCount();
305 while (alertCursor.moveToNext()) {
306 long otherEventId = alertCursor.getLong(ALERT_INDEX_EVENT_ID);
307 long otherAlertId = alertCursor.getLong(ALERT_INDEX_ID);
308 int otherAlarmState = alertCursor.getInt(ALERT_INDEX_STATE);
309 long otherBeginTime = alertCursor.getLong(ALERT_INDEX_BEGIN);
310 if (otherEventId == eventId && otherAlertId != alertId
311 && otherAlarmState == CalendarAlerts.FIRED
312 && otherBeginTime == beginTime) {
313 // This event already has an alert that fired and has not
314 // been dismissed. This can happen if an event has
315 // multiple reminders. Do not count this as a separate
316 // reminder. But we do want to sound the alarm and vibrate
317 // the phone, if necessary.
318 if (Log.isLoggable(TAG, Log.DEBUG)) {
319 Log.d(TAG, "multiple alarms for this event");
328 if (Log.isLoggable(TAG, Log.DEBUG)) {
329 Log.d(TAG, "creating new alarm notification, numReminders: " + numReminders);
331 Notification notification = AlertReceiver.makeNewAlertNotification(this, eventName,
332 location, numReminders);
334 // Generate either a pop-up dialog, status bar notification, or
335 // neither. Pop-up dialog and status bar notification may include a
336 // sound, an alert, or both. A status bar notification also includes
338 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
339 String reminderType = prefs.getString(CalendarPreferenceActivity.KEY_ALERTS_TYPE,
340 CalendarPreferenceActivity.ALERT_TYPE_STATUS_BAR);
342 if (reminderType.equals(CalendarPreferenceActivity.ALERT_TYPE_OFF)) {
343 if (Log.isLoggable(TAG, Log.DEBUG)) {
344 Log.d(TAG, "alert preference is OFF");
349 NotificationManager nm =
350 (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
351 boolean reminderVibrate =
352 prefs.getBoolean(CalendarPreferenceActivity.KEY_ALERTS_VIBRATE, false);
353 String reminderRingtone =
354 prefs.getString(CalendarPreferenceActivity.KEY_ALERTS_RINGTONE, null);
356 // Possibly generate a vibration
357 if (reminderVibrate) {
358 notification.defaults |= Notification.DEFAULT_VIBRATE;
361 // Possibly generate a sound. If 'Silent' is chosen, the ringtone string will be empty.
362 notification.sound = TextUtils.isEmpty(reminderRingtone) ? null : Uri
363 .parse(reminderRingtone);
365 if (reminderType.equals(CalendarPreferenceActivity.ALERT_TYPE_ALERTS)) {
366 Intent alertIntent = new Intent();
367 alertIntent.setClass(this, AlertActivity.class);
368 alertIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
369 startActivity(alertIntent);
371 LayoutInflater inflater;
372 inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
373 View view = inflater.inflate(R.layout.alert_toast, null);
375 AlertAdapter.updateView(this, view, eventName, location, beginTime, endTime, allDay);
378 // Record the notify time in the CalendarAlerts table.
379 // This is used for debugging missed alarms.
380 ContentValues values = new ContentValues();
381 long currentTime = System.currentTimeMillis();
382 values.put(CalendarAlerts.NOTIFY_TIME, currentTime);
383 cr.update(alertUri, values, null /* where */, null /* args */);
385 // The notification time should be pretty close to the reminder time
386 // that the user set for this event. If the notification is late, then
387 // that's a bug and we should log an error.
388 if (currentTime > alarmTime + DateUtils.MINUTE_IN_MILLIS) {
389 long minutesLate = (currentTime - alarmTime) / DateUtils.MINUTE_IN_MILLIS;
390 int flags = DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_TIME;
391 String alarmTimeStr = DateUtils.formatDateTime(this, alarmTime, flags);
392 String currentTimeStr = DateUtils.formatDateTime(this, currentTime, flags);
393 Log.w(TAG, "Calendar reminder alarm for event id " + eventId
394 + " is " + minutesLate + " minute(s) late;"
395 + " expected alarm at: " + alarmTimeStr
396 + " but got it at: " + currentTimeStr);
399 nm.notify(0, notification);
402 private void doTimeChanged() {
403 ContentResolver cr = getContentResolver();
404 Object service = getSystemService(Context.ALARM_SERVICE);
405 AlarmManager manager = (AlarmManager) service;
406 CalendarAlerts.rescheduleMissedAlarms(cr, this, manager);
407 AlertReceiver.updateAlertNotification(this);
410 private final class ServiceHandler extends Handler {
411 public ServiceHandler(Looper looper) {
416 public void handleMessage(Message msg) {
418 // NOTE: We MUST not call stopSelf() directly, since we need to
419 // make sure the wake lock acquired by AlertReceiver is released.
420 AlertReceiver.finishStartingService(AlertService.this, msg.arg1);
425 public void onCreate() {
426 HandlerThread thread = new HandlerThread("AlertService",
427 Process.THREAD_PRIORITY_BACKGROUND);
430 mServiceLooper = thread.getLooper();
431 mServiceHandler = new ServiceHandler(mServiceLooper);
435 public int onStartCommand(Intent intent, int flags, int startId) {
436 if (intent != null) {
437 Message msg = mServiceHandler.obtainMessage();
439 msg.obj = intent.getExtras();
440 mServiceHandler.sendMessage(msg);
442 return START_REDELIVER_INTENT;
446 public void onDestroy() {
447 mServiceLooper.quit();
451 public IBinder onBind(Intent intent) {