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      1 /*
      2  * Copyright (C) 2009 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.phone;
     18 
     19 import android.app.Notification;
     20 import android.app.NotificationManager;
     21 import android.app.PendingIntent;
     22 import android.app.Service;
     23 import android.content.BroadcastReceiver;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.content.IntentFilter;
     27 import android.content.res.Resources;
     28 import android.os.AsyncResult;
     29 import android.os.Binder;
     30 import android.os.CountDownTimer;
     31 import android.os.Handler;
     32 import android.os.IBinder;
     33 import android.os.Message;
     34 import android.os.SystemProperties;
     35 import android.util.Log;
     36 
     37 import com.android.internal.telephony.cdma.CDMAPhone;
     38 import com.android.internal.telephony.Phone;
     39 import com.android.internal.telephony.PhoneFactory;
     40 import com.android.internal.telephony.TelephonyIntents;
     41 import com.android.internal.telephony.TelephonyProperties;
     42 
     43 /**
     44  * Application service that inserts/removes Emergency Callback Mode notification and
     45  * updates Emergency Callback Mode countdown clock in the notification
     46  *
     47  * @see EmergencyCallbackModeExitDialog
     48  */
     49 public class EmergencyCallbackModeService extends Service {
     50 
     51     // Default Emergency Callback Mode timeout value
     52     private static final int DEFAULT_ECM_EXIT_TIMER_VALUE = 300000;
     53     private static final String LOG_TAG = "EmergencyCallbackModeService";
     54 
     55     private NotificationManager mNotificationManager = null;
     56     private CountDownTimer mTimer = null;
     57     private long mTimeLeft = 0;
     58     private Phone mPhone = null;
     59     private boolean mInEmergencyCall = false;
     60 
     61     private static final int ECM_TIMER_RESET = 1;
     62 
     63     private Handler mHandler = new Handler () {
     64         public void handleMessage(Message msg) {
     65             switch (msg.what) {
     66                 case ECM_TIMER_RESET:
     67                     resetEcmTimer((AsyncResult) msg.obj);
     68                     break;
     69             }
     70         }
     71     };
     72 
     73     @Override
     74     public void onCreate() {
     75         // Check if it is CDMA phone
     76         if (PhoneFactory.getDefaultPhone().getPhoneType() != Phone.PHONE_TYPE_CDMA) {
     77             Log.e(LOG_TAG, "Error! Emergency Callback Mode not supported for " +
     78                     PhoneFactory.getDefaultPhone().getPhoneName() + " phones");
     79             stopSelf();
     80         }
     81 
     82         // Register receiver for intents
     83         IntentFilter filter = new IntentFilter();
     84         filter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
     85         filter.addAction(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS);
     86         registerReceiver(mEcmReceiver, filter);
     87 
     88         mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
     89 
     90         // Register ECM timer reset notfication
     91         mPhone = PhoneFactory.getDefaultPhone();
     92         mPhone.registerForEcmTimerReset(mHandler, ECM_TIMER_RESET, null);
     93 
     94         startTimerNotification();
     95     }
     96 
     97     @Override
     98     public void onDestroy() {
     99         // Unregister receiver
    100         unregisterReceiver(mEcmReceiver);
    101         // Unregister ECM timer reset notification
    102         mPhone.unregisterForEcmTimerReset(mHandler);
    103 
    104         // Cancel the notification and timer
    105         mNotificationManager.cancel(R.string.phone_in_ecm_notification_title);
    106         mTimer.cancel();
    107     }
    108 
    109     /**
    110      * Listens for Emergency Callback Mode intents
    111      */
    112     private BroadcastReceiver mEcmReceiver = new BroadcastReceiver() {
    113         @Override
    114         public void onReceive(Context context, Intent intent) {
    115             // Stop the service when phone exits Emergency Callback Mode
    116             if (intent.getAction().equals(
    117                     TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
    118                 if (intent.getBooleanExtra("phoneinECMState", false) == false) {
    119                     stopSelf();
    120                 }
    121             }
    122             // Show dialog box
    123             else if (intent.getAction().equals(
    124                     TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)) {
    125                     context.startActivity(
    126                             new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)
    127                     .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
    128             }
    129         }
    130     };
    131 
    132     /**
    133      * Start timer notification for Emergency Callback Mode
    134      */
    135     private void startTimerNotification() {
    136         // Get Emergency Callback Mode timeout value
    137         long ecmTimeout = SystemProperties.getLong(
    138                     TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
    139 
    140         // Show the notification
    141         showNotification(ecmTimeout);
    142 
    143         // Start countdown timer for the notification updates
    144         mTimer = new CountDownTimer(ecmTimeout, 1000) {
    145 
    146             @Override
    147             public void onTick(long millisUntilFinished) {
    148                 mTimeLeft = millisUntilFinished;
    149                 EmergencyCallbackModeService.this.showNotification(millisUntilFinished);
    150             }
    151 
    152             @Override
    153             public void onFinish() {
    154                 //Do nothing
    155             }
    156 
    157         }.start();
    158     }
    159 
    160     /**
    161      * Shows notification for Emergency Callback Mode
    162      */
    163     private void showNotification(long millisUntilFinished) {
    164 
    165         // Set the icon and text
    166         Notification notification = new Notification(
    167                 R.drawable.picture_emergency25x25,
    168                 getText(R.string.phone_entered_ecm_text), 0);
    169 
    170         // PendingIntent to launch Emergency Callback Mode Exit activity if the user selects
    171         // this notification
    172         PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    173                 new Intent(EmergencyCallbackModeExitDialog.ACTION_SHOW_ECM_EXIT_DIALOG), 0);
    174 
    175         // Format notification string
    176         String text = null;
    177         if(mInEmergencyCall) {
    178             text = getText(R.string.phone_in_ecm_call_notification_text).toString();
    179         } else {
    180             int minutes = (int)(millisUntilFinished / 60000);
    181             String time = String.format("%d:%02d", minutes, (millisUntilFinished % 60000) / 1000);
    182             text = String.format(getResources().getQuantityText(
    183                      R.plurals.phone_in_ecm_notification_time, minutes).toString(), time);
    184         }
    185         // Set the info in the notification
    186         notification.setLatestEventInfo(this, getText(R.string.phone_in_ecm_notification_title),
    187                 text, contentIntent);
    188 
    189         notification.flags = Notification.FLAG_ONGOING_EVENT;
    190 
    191         // Show notification
    192         mNotificationManager.notify(R.string.phone_in_ecm_notification_title, notification);
    193     }
    194 
    195     /**
    196      * Handle ECM_TIMER_RESET notification
    197      */
    198     private void resetEcmTimer(AsyncResult r) {
    199         boolean isTimerCanceled = ((Boolean)r.result).booleanValue();
    200 
    201         if (isTimerCanceled) {
    202             mInEmergencyCall = true;
    203             mTimer.cancel();
    204             showNotification(0);
    205         } else {
    206             mInEmergencyCall = false;
    207             startTimerNotification();
    208         }
    209     }
    210 
    211     @Override
    212     public IBinder onBind(Intent intent) {
    213         return mBinder;
    214     }
    215 
    216     // This is the object that receives interactions from clients.
    217     private final IBinder mBinder = new LocalBinder();
    218 
    219     /**
    220      * Class for clients to access
    221      */
    222     public class LocalBinder extends Binder {
    223         EmergencyCallbackModeService getService() {
    224             return EmergencyCallbackModeService.this;
    225         }
    226     }
    227 
    228     /**
    229      * Returns Emergency Callback Mode timeout value
    230      */
    231     public long getEmergencyCallbackModeTimeout() {
    232         return mTimeLeft;
    233     }
    234 
    235     /**
    236      * Returns Emergency Callback Mode call state
    237      */
    238     public boolean getEmergencyCallbackModeCallState() {
    239         return mInEmergencyCall;
    240     }
    241 }
    242