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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      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
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     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.
     15  */
     16 
     17 package com.android.cellbroadcastreceiver;
     18 
     19 import android.app.AlarmManager;
     20 import android.app.PendingIntent;
     21 import android.app.Service;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.content.SharedPreferences;
     25 import android.media.Ringtone;
     26 import android.media.RingtoneManager;
     27 import android.net.Uri;
     28 import android.os.IBinder;
     29 import android.os.SystemClock;
     30 import android.preference.PreferenceManager;
     31 import android.telephony.CellBroadcastMessage;
     32 import android.telephony.SubscriptionManager;
     33 import android.util.Log;
     34 import android.media.AudioManager;
     35 import static com.android.cellbroadcastreceiver.CellBroadcastReceiver.DBG;
     36 import com.android.internal.telephony.PhoneConstants;
     37 
     38 /**
     39  * Manages alert reminder notification.
     40  */
     41 public class CellBroadcastAlertReminder extends Service {
     42     private static final String TAG = "CellBroadcastAlertReminder";
     43 
     44     /** Action to wake up and play alert reminder sound. */
     45     static final String ACTION_PLAY_ALERT_REMINDER = "ACTION_PLAY_ALERT_REMINDER";
     46 
     47     /**
     48      * Pending intent for alert reminder. This is static so that we don't have to start the
     49      * service in order to cancel any pending reminders when user dismisses the alert dialog.
     50      */
     51     private static PendingIntent sPlayReminderIntent;
     52 
     53     /**
     54      * Alert reminder for current ringtone being played.
     55      */
     56     private static Ringtone sPlayReminderRingtone;
     57 
     58     @Override
     59     public IBinder onBind(Intent intent) {
     60         return null;
     61     }
     62 
     63     @Override
     64     public int onStartCommand(Intent intent, int flags, int startId) {
     65         // No intent or unrecognized action; tell the system not to restart us.
     66         if (intent == null || !ACTION_PLAY_ALERT_REMINDER.equals(intent.getAction())) {
     67             stopSelf();
     68             return START_NOT_STICKY;
     69         }
     70 
     71         int subId = intent.getExtras().getInt(PhoneConstants.SUBSCRIPTION_KEY);
     72         if(DBG) Log.d(TAG, "subscription id = " + subId);
     73 
     74         log("playing alert reminder");
     75         playAlertReminderSound();
     76 
     77         if (queueAlertReminder(this, false, subId)) {
     78             return START_STICKY;
     79         } else {
     80             log("no reminders queued");
     81             stopSelf();
     82             return START_NOT_STICKY;
     83         }
     84     }
     85 
     86     /**
     87      * Use the RingtoneManager to play the alert reminder sound.
     88      */
     89     private void playAlertReminderSound() {
     90         Uri notificationUri = RingtoneManager.getDefaultUri(
     91                 RingtoneManager.TYPE_NOTIFICATION);
     92         if (notificationUri == null) {
     93             loge("Can't get URI for alert reminder sound");
     94             return;
     95         }
     96         Ringtone r = RingtoneManager.getRingtone(this, notificationUri);
     97         r.setStreamType(AudioManager.STREAM_NOTIFICATION);
     98 
     99         if (r != null) {
    100             log("playing alert reminder sound");
    101             r.play();
    102         } else {
    103             loge("can't get Ringtone for alert reminder sound");
    104         }
    105     }
    106 
    107     /**
    108      * Helper method to start the alert reminder service to queue the alert reminder.
    109      * @return true if a pending reminder was set; false if there are no more reminders
    110      */
    111     static boolean queueAlertReminder(Context context, boolean firstTime, int subId) {
    112         // Stop any alert reminder sound and cancel any previously queued reminders.
    113         cancelAlertReminder();
    114 
    115         int interval = SubscriptionManager.getIntegerSubscriptionProperty(subId,
    116                 SubscriptionManager.CB_ALERT_REMINDER_INTERVAL, Integer.parseInt(
    117                         CellBroadcastSettings.ALERT_REMINDER_INTERVAL), context);
    118 
    119         if (interval == 0 || (interval == 1 && !firstTime)) {
    120             return false;
    121         }
    122         if (interval == 1) {
    123             interval = 2;   // "1" = one reminder after 2 minutes
    124         }
    125 
    126         if (DBG) log("queueAlertReminder() in " + interval + " minutes");
    127 
    128         Intent playIntent = new Intent(context, CellBroadcastAlertReminder.class);
    129         playIntent.setAction(ACTION_PLAY_ALERT_REMINDER);
    130         playIntent.putExtra(PhoneConstants.SUBSCRIPTION_KEY, subId);
    131         sPlayReminderIntent = PendingIntent.getService(context, 0, playIntent,
    132                 PendingIntent.FLAG_UPDATE_CURRENT);
    133 
    134         AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    135         if (alarmManager == null) {
    136             loge("can't get Alarm Service");
    137             return false;
    138         }
    139 
    140         // remind user after 2 minutes or 15 minutes
    141         long triggerTime = SystemClock.elapsedRealtime() + (interval * 60000);
    142         alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerTime, sPlayReminderIntent);
    143         return true;
    144     }
    145 
    146     /**
    147      * Stops alert reminder and cancels any queued reminders.
    148      */
    149     static void cancelAlertReminder() {
    150         if (DBG) log("cancelAlertReminder()");
    151         if (sPlayReminderRingtone != null) {
    152             if (DBG) log("stopping play reminder ringtone");
    153             sPlayReminderRingtone.stop();
    154             sPlayReminderRingtone = null;
    155         }
    156         if (sPlayReminderIntent != null) {
    157             if (DBG) log("canceling pending play reminder intent");
    158             sPlayReminderIntent.cancel();
    159             sPlayReminderIntent = null;
    160         }
    161     }
    162 
    163     private static void log(String msg) {
    164         Log.d(TAG, msg);
    165     }
    166 
    167     private static void loge(String msg) {
    168         Log.e(TAG, msg);
    169     }
    170 }
    171