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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.Phone;
     39 import com.android.internal.telephony.PhoneConstants;
     40 import com.android.internal.telephony.PhoneFactory;
     41 import com.android.internal.telephony.TelephonyIntents;
     42 import com.android.internal.telephony.TelephonyProperties;
     43 
     44 /**
     45  * Application service that inserts/removes Emergency Callback Mode notification and
     46  * updates Emergency Callback Mode countdown clock in the notification
     47  *
     48  * @see EmergencyCallbackModeExitDialog
     49  */
     50 public class EmergencyCallbackModeService extends Service {
     51 
     52     // Default Emergency Callback Mode timeout value
     53     private static final int DEFAULT_ECM_EXIT_TIMER_VALUE = 300000;
     54     private static final String LOG_TAG = "EmergencyCallbackModeService";
     55 
     56     private NotificationManager mNotificationManager = null;
     57     private CountDownTimer mTimer = null;
     58     private long mTimeLeft = 0;
     59     private Phone mPhone = null;
     60     private boolean mInEmergencyCall = false;
     61 
     62     private static final int ECM_TIMER_RESET = 1;
     63 
     64     private Handler mHandler = new Handler () {
     65         public void handleMessage(Message msg) {
     66             switch (msg.what) {
     67                 case ECM_TIMER_RESET:
     68                     resetEcmTimer((AsyncResult) msg.obj);
     69                     break;
     70             }
     71         }
     72     };
     73 
     74     @Override
     75     public void onCreate() {
     76          Phone phoneInEcm = PhoneGlobals.getInstance().getPhoneInEcm();
     77         // Check if it is CDMA phone
     78         if (phoneInEcm == null || ((phoneInEcm.getPhoneType() != PhoneConstants.PHONE_TYPE_CDMA)
     79                 && (phoneInEcm.getImsPhone() == null))) {
     80             Log.e(LOG_TAG, "Error! Emergency Callback Mode not supported for " + phoneInEcm);
     81             stopSelf();
     82             return;
     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 = phoneInEcm;
     95         mPhone.registerForEcmTimerReset(mHandler, ECM_TIMER_RESET, null);
     96 
     97         startTimerNotification();
     98     }
     99 
    100     @Override
    101     public void onDestroy() {
    102         if (mPhone != null) {
    103             // Unregister receiver
    104             unregisterReceiver(mEcmReceiver);
    105             // Unregister ECM timer reset notification
    106             mPhone.unregisterForEcmTimerReset(mHandler);
    107 
    108             // Cancel the notification and timer
    109             mNotificationManager.cancel(R.string.phone_in_ecm_notification_title);
    110             mTimer.cancel();
    111         }
    112     }
    113 
    114     /**
    115      * Listens for Emergency Callback Mode intents
    116      */
    117     private BroadcastReceiver mEcmReceiver = new BroadcastReceiver() {
    118         @Override
    119         public void onReceive(Context context, Intent intent) {
    120             // Stop the service when phone exits Emergency Callback Mode
    121             if (intent.getAction().equals(
    122                     TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
    123                 if (intent.getBooleanExtra("phoneinECMState", false) == false) {
    124                     stopSelf();
    125                 }
    126             }
    127             // Show dialog box
    128             else if (intent.getAction().equals(
    129                     TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)) {
    130                     context.startActivity(
    131                             new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)
    132                     .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
    133             }
    134         }
    135     };
    136 
    137     /**
    138      * Start timer notification for Emergency Callback Mode
    139      */
    140     private void startTimerNotification() {
    141         // Get Emergency Callback Mode timeout value
    142         long ecmTimeout = SystemProperties.getLong(
    143                     TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
    144 
    145         // Show the notification
    146         showNotification(ecmTimeout);
    147 
    148         // Start countdown timer for the notification updates
    149         if (mTimer != null) {
    150             mTimer.cancel();
    151         } else {
    152             mTimer = new CountDownTimer(ecmTimeout, 1000) {
    153 
    154                 @Override
    155                 public void onTick(long millisUntilFinished) {
    156                     mTimeLeft = millisUntilFinished;
    157                     EmergencyCallbackModeService.this.showNotification(millisUntilFinished);
    158                 }
    159 
    160                 @Override
    161                 public void onFinish() {
    162                     //Do nothing
    163                 }
    164 
    165             };
    166         }
    167         mTimer.start();
    168     }
    169 
    170     /**
    171      * Shows notification for Emergency Callback Mode
    172      */
    173     private void showNotification(long millisUntilFinished) {
    174         Phone imsPhone = mPhone.getImsPhone();
    175         boolean isInEcm = mPhone.isInEcm() || (imsPhone != null && imsPhone.isInEcm());
    176         if (!isInEcm) {
    177             Log.i(LOG_TAG, "Asked to show notification but not in ECM mode");
    178             if (mTimer != null) {
    179                 mTimer.cancel();
    180             }
    181             return;
    182         }
    183         final Notification.Builder builder = new Notification.Builder(getApplicationContext());
    184         builder.setOngoing(true);
    185         builder.setPriority(Notification.PRIORITY_HIGH);
    186         builder.setSmallIcon(R.drawable.ic_emergency_callback_mode);
    187         builder.setTicker(getText(R.string.phone_entered_ecm_text));
    188         builder.setContentTitle(getText(R.string.phone_in_ecm_notification_title));
    189         builder.setColor(getResources().getColor(R.color.dialer_theme_color));
    190 
    191         // PendingIntent to launch Emergency Callback Mode Exit activity if the user selects
    192         // this notification
    193         PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    194                 new Intent(EmergencyCallbackModeExitDialog.ACTION_SHOW_ECM_EXIT_DIALOG), 0);
    195         builder.setContentIntent(contentIntent);
    196 
    197         // Format notification string
    198         String text = null;
    199         if(mInEmergencyCall) {
    200             text = getText(R.string.phone_in_ecm_call_notification_text).toString();
    201         } else {
    202             int minutes = (int)(millisUntilFinished / 60000);
    203             String time = String.format("%d:%02d", minutes, (millisUntilFinished % 60000) / 1000);
    204             text = String.format(getResources().getQuantityText(
    205                      R.plurals.phone_in_ecm_notification_time, minutes).toString(), time);
    206         }
    207         builder.setContentText(text);
    208 
    209         // Show notification
    210         mNotificationManager.notify(R.string.phone_in_ecm_notification_title, builder.build());
    211     }
    212 
    213     /**
    214      * Handle ECM_TIMER_RESET notification
    215      */
    216     private void resetEcmTimer(AsyncResult r) {
    217         boolean isTimerCanceled = ((Boolean)r.result).booleanValue();
    218 
    219         if (isTimerCanceled) {
    220             mInEmergencyCall = true;
    221             mTimer.cancel();
    222             showNotification(0);
    223         } else {
    224             mInEmergencyCall = false;
    225             startTimerNotification();
    226         }
    227     }
    228 
    229     @Override
    230     public IBinder onBind(Intent intent) {
    231         return mBinder;
    232     }
    233 
    234     // This is the object that receives interactions from clients.
    235     private final IBinder mBinder = new LocalBinder();
    236 
    237     /**
    238      * Class for clients to access
    239      */
    240     public class LocalBinder extends Binder {
    241         EmergencyCallbackModeService getService() {
    242             return EmergencyCallbackModeService.this;
    243         }
    244     }
    245 
    246     /**
    247      * Returns Emergency Callback Mode timeout value
    248      */
    249     public long getEmergencyCallbackModeTimeout() {
    250         return mTimeLeft;
    251     }
    252 
    253     /**
    254      * Returns Emergency Callback Mode call state
    255      */
    256     public boolean getEmergencyCallbackModeCallState() {
    257         return mInEmergencyCall;
    258     }
    259 }
    260