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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.graphics.BitmapFactory;
     29 import android.os.AsyncResult;
     30 import android.os.Binder;
     31 import android.os.CountDownTimer;
     32 import android.os.Handler;
     33 import android.os.IBinder;
     34 import android.os.Message;
     35 import android.os.SystemProperties;
     36 import android.util.Log;
     37 
     38 import com.android.internal.telephony.cdma.CDMAPhone;
     39 import com.android.internal.telephony.Phone;
     40 import com.android.internal.telephony.PhoneConstants;
     41 import com.android.internal.telephony.PhoneFactory;
     42 import com.android.internal.telephony.TelephonyIntents;
     43 import com.android.internal.telephony.TelephonyProperties;
     44 
     45 /**
     46  * Application service that inserts/removes Emergency Callback Mode notification and
     47  * updates Emergency Callback Mode countdown clock in the notification
     48  *
     49  * @see EmergencyCallbackModeExitDialog
     50  */
     51 public class EmergencyCallbackModeService extends Service {
     52 
     53     // Default Emergency Callback Mode timeout value
     54     private static final int DEFAULT_ECM_EXIT_TIMER_VALUE = 300000;
     55     private static final String LOG_TAG = "EmergencyCallbackModeService";
     56 
     57     private NotificationManager mNotificationManager = null;
     58     private CountDownTimer mTimer = null;
     59     private long mTimeLeft = 0;
     60     private Phone mPhone = null;
     61     private boolean mInEmergencyCall = false;
     62 
     63     private static final int ECM_TIMER_RESET = 1;
     64 
     65     private Handler mHandler = new Handler () {
     66         public void handleMessage(Message msg) {
     67             switch (msg.what) {
     68                 case ECM_TIMER_RESET:
     69                     resetEcmTimer((AsyncResult) msg.obj);
     70                     break;
     71             }
     72         }
     73     };
     74 
     75     @Override
     76     public void onCreate() {
     77         // Check if it is CDMA phone
     78         if ((PhoneFactory.getDefaultPhone().getPhoneType() != PhoneConstants.PHONE_TYPE_CDMA)
     79                 && (PhoneFactory.getDefaultPhone().getImsPhone() == null)) {
     80             Log.e(LOG_TAG, "Error! Emergency Callback Mode not supported for " +
     81                     PhoneFactory.getDefaultPhone().getPhoneName() + " phones");
     82             stopSelf();
     83         }
     84 
     85         // Register receiver for intents
     86         IntentFilter filter = new IntentFilter();
     87         filter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
     88         filter.addAction(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS);
     89         registerReceiver(mEcmReceiver, filter);
     90 
     91         mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
     92 
     93         // Register ECM timer reset notfication
     94         mPhone = PhoneFactory.getDefaultPhone();
     95         mPhone.registerForEcmTimerReset(mHandler, ECM_TIMER_RESET, null);
     96 
     97         startTimerNotification();
     98     }
     99 
    100     @Override
    101     public void onDestroy() {
    102         // Unregister receiver
    103         unregisterReceiver(mEcmReceiver);
    104         // Unregister ECM timer reset notification
    105         mPhone.unregisterForEcmTimerReset(mHandler);
    106 
    107         // Cancel the notification and timer
    108         mNotificationManager.cancel(R.string.phone_in_ecm_notification_title);
    109         mTimer.cancel();
    110     }
    111 
    112     /**
    113      * Listens for Emergency Callback Mode intents
    114      */
    115     private BroadcastReceiver mEcmReceiver = new BroadcastReceiver() {
    116         @Override
    117         public void onReceive(Context context, Intent intent) {
    118             // Stop the service when phone exits Emergency Callback Mode
    119             if (intent.getAction().equals(
    120                     TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
    121                 if (intent.getBooleanExtra("phoneinECMState", false) == false) {
    122                     stopSelf();
    123                 }
    124             }
    125             // Show dialog box
    126             else if (intent.getAction().equals(
    127                     TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)) {
    128                     context.startActivity(
    129                             new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)
    130                     .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
    131             }
    132         }
    133     };
    134 
    135     /**
    136      * Start timer notification for Emergency Callback Mode
    137      */
    138     private void startTimerNotification() {
    139         // Get Emergency Callback Mode timeout value
    140         long ecmTimeout = SystemProperties.getLong(
    141                     TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
    142 
    143         // Show the notification
    144         showNotification(ecmTimeout);
    145 
    146         // Start countdown timer for the notification updates
    147         if (mTimer != null) {
    148             mTimer.cancel();
    149         } else {
    150             mTimer = new CountDownTimer(ecmTimeout, 1000) {
    151 
    152                 @Override
    153                 public void onTick(long millisUntilFinished) {
    154                     mTimeLeft = millisUntilFinished;
    155                     EmergencyCallbackModeService.this.showNotification(millisUntilFinished);
    156                 }
    157 
    158                 @Override
    159                 public void onFinish() {
    160                     //Do nothing
    161                 }
    162 
    163             };
    164         }
    165         mTimer.start();
    166     }
    167 
    168     /**
    169      * Shows notification for Emergency Callback Mode
    170      */
    171     private void showNotification(long millisUntilFinished) {
    172         final boolean isInEcm = Boolean.parseBoolean(
    173                 SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE));
    174         if (!isInEcm) {
    175             Log.i(LOG_TAG, "Asked to show notification but not in ECM mode");
    176             if (mTimer != null) {
    177                 mTimer.cancel();
    178             }
    179             return;
    180         }
    181         final Notification.Builder builder = new Notification.Builder(getApplicationContext());
    182         builder.setOngoing(true);
    183         builder.setPriority(Notification.PRIORITY_HIGH);
    184         builder.setSmallIcon(R.drawable.ic_emergency_callback_mode);
    185         builder.setTicker(getText(R.string.phone_entered_ecm_text));
    186         builder.setContentTitle(getText(R.string.phone_in_ecm_notification_title));
    187         builder.setColor(getResources().getColor(R.color.dialer_theme_color));
    188 
    189         // PendingIntent to launch Emergency Callback Mode Exit activity if the user selects
    190         // this notification
    191         PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    192                 new Intent(EmergencyCallbackModeExitDialog.ACTION_SHOW_ECM_EXIT_DIALOG), 0);
    193         builder.setContentIntent(contentIntent);
    194 
    195         // Format notification string
    196         String text = null;
    197         if(mInEmergencyCall) {
    198             text = getText(R.string.phone_in_ecm_call_notification_text).toString();
    199         } else {
    200             int minutes = (int)(millisUntilFinished / 60000);
    201             String time = String.format("%d:%02d", minutes, (millisUntilFinished % 60000) / 1000);
    202             text = String.format(getResources().getQuantityText(
    203                      R.plurals.phone_in_ecm_notification_time, minutes).toString(), time);
    204         }
    205         builder.setContentText(text);
    206 
    207         // Show notification
    208         mNotificationManager.notify(R.string.phone_in_ecm_notification_title, builder.build());
    209     }
    210 
    211     /**
    212      * Handle ECM_TIMER_RESET notification
    213      */
    214     private void resetEcmTimer(AsyncResult r) {
    215         boolean isTimerCanceled = ((Boolean)r.result).booleanValue();
    216 
    217         if (isTimerCanceled) {
    218             mInEmergencyCall = true;
    219             mTimer.cancel();
    220             showNotification(0);
    221         } else {
    222             mInEmergencyCall = false;
    223             startTimerNotification();
    224         }
    225     }
    226 
    227     @Override
    228     public IBinder onBind(Intent intent) {
    229         return mBinder;
    230     }
    231 
    232     // This is the object that receives interactions from clients.
    233     private final IBinder mBinder = new LocalBinder();
    234 
    235     /**
    236      * Class for clients to access
    237      */
    238     public class LocalBinder extends Binder {
    239         EmergencyCallbackModeService getService() {
    240             return EmergencyCallbackModeService.this;
    241         }
    242     }
    243 
    244     /**
    245      * Returns Emergency Callback Mode timeout value
    246      */
    247     public long getEmergencyCallbackModeTimeout() {
    248         return mTimeLeft;
    249     }
    250 
    251     /**
    252      * Returns Emergency Callback Mode call state
    253      */
    254     public boolean getEmergencyCallbackModeCallState() {
    255         return mInEmergencyCall;
    256     }
    257 }
    258