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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.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         // Check if it is CDMA phone
     77         if (PhoneFactory.getDefaultPhone().getPhoneType() != PhoneConstants.PHONE_TYPE_CDMA) {
     78             Log.e(LOG_TAG, "Error! Emergency Callback Mode not supported for " +
     79                     PhoneFactory.getDefaultPhone().getPhoneName() + " phones");
     80             stopSelf();
     81         }
     82 
     83         // Register receiver for intents
     84         IntentFilter filter = new IntentFilter();
     85         filter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
     86         filter.addAction(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS);
     87         registerReceiver(mEcmReceiver, filter);
     88 
     89         mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
     90 
     91         // Register ECM timer reset notfication
     92         mPhone = PhoneFactory.getDefaultPhone();
     93         mPhone.registerForEcmTimerReset(mHandler, ECM_TIMER_RESET, null);
     94 
     95         startTimerNotification();
     96     }
     97 
     98     @Override
     99     public void onDestroy() {
    100         // Unregister receiver
    101         unregisterReceiver(mEcmReceiver);
    102         // Unregister ECM timer reset notification
    103         mPhone.unregisterForEcmTimerReset(mHandler);
    104 
    105         // Cancel the notification and timer
    106         mNotificationManager.cancel(R.string.phone_in_ecm_notification_title);
    107         mTimer.cancel();
    108     }
    109 
    110     /**
    111      * Listens for Emergency Callback Mode intents
    112      */
    113     private BroadcastReceiver mEcmReceiver = new BroadcastReceiver() {
    114         @Override
    115         public void onReceive(Context context, Intent intent) {
    116             // Stop the service when phone exits Emergency Callback Mode
    117             if (intent.getAction().equals(
    118                     TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
    119                 if (intent.getBooleanExtra("phoneinECMState", false) == false) {
    120                     stopSelf();
    121                 }
    122             }
    123             // Show dialog box
    124             else if (intent.getAction().equals(
    125                     TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)) {
    126                     context.startActivity(
    127                             new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)
    128                     .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
    129             }
    130         }
    131     };
    132 
    133     /**
    134      * Start timer notification for Emergency Callback Mode
    135      */
    136     private void startTimerNotification() {
    137         // Get Emergency Callback Mode timeout value
    138         long ecmTimeout = SystemProperties.getLong(
    139                     TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
    140 
    141         // Show the notification
    142         showNotification(ecmTimeout);
    143 
    144         // Start countdown timer for the notification updates
    145         mTimer = new CountDownTimer(ecmTimeout, 1000) {
    146 
    147             @Override
    148             public void onTick(long millisUntilFinished) {
    149                 mTimeLeft = millisUntilFinished;
    150                 EmergencyCallbackModeService.this.showNotification(millisUntilFinished);
    151             }
    152 
    153             @Override
    154             public void onFinish() {
    155                 //Do nothing
    156             }
    157 
    158         }.start();
    159     }
    160 
    161     /**
    162      * Shows notification for Emergency Callback Mode
    163      */
    164     private void showNotification(long millisUntilFinished) {
    165 
    166         // Set the icon and text
    167         Notification notification = new Notification(
    168                 R.drawable.picture_emergency25x25,
    169                 getText(R.string.phone_entered_ecm_text), 0);
    170 
    171         // PendingIntent to launch Emergency Callback Mode Exit activity if the user selects
    172         // this notification
    173         PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    174                 new Intent(EmergencyCallbackModeExitDialog.ACTION_SHOW_ECM_EXIT_DIALOG), 0);
    175 
    176         // Format notification string
    177         String text = null;
    178         if(mInEmergencyCall) {
    179             text = getText(R.string.phone_in_ecm_call_notification_text).toString();
    180         } else {
    181             int minutes = (int)(millisUntilFinished / 60000);
    182             String time = String.format("%d:%02d", minutes, (millisUntilFinished % 60000) / 1000);
    183             text = String.format(getResources().getQuantityText(
    184                      R.plurals.phone_in_ecm_notification_time, minutes).toString(), time);
    185         }
    186         // Set the info in the notification
    187         notification.setLatestEventInfo(this, getText(R.string.phone_in_ecm_notification_title),
    188                 text, contentIntent);
    189 
    190         notification.flags = Notification.FLAG_ONGOING_EVENT;
    191 
    192         // Show notification
    193         mNotificationManager.notify(R.string.phone_in_ecm_notification_title, notification);
    194     }
    195 
    196     /**
    197      * Handle ECM_TIMER_RESET notification
    198      */
    199     private void resetEcmTimer(AsyncResult r) {
    200         boolean isTimerCanceled = ((Boolean)r.result).booleanValue();
    201 
    202         if (isTimerCanceled) {
    203             mInEmergencyCall = true;
    204             mTimer.cancel();
    205             showNotification(0);
    206         } else {
    207             mInEmergencyCall = false;
    208             startTimerNotification();
    209         }
    210     }
    211 
    212     @Override
    213     public IBinder onBind(Intent intent) {
    214         return mBinder;
    215     }
    216 
    217     // This is the object that receives interactions from clients.
    218     private final IBinder mBinder = new LocalBinder();
    219 
    220     /**
    221      * Class for clients to access
    222      */
    223     public class LocalBinder extends Binder {
    224         EmergencyCallbackModeService getService() {
    225             return EmergencyCallbackModeService.this;
    226         }
    227     }
    228 
    229     /**
    230      * Returns Emergency Callback Mode timeout value
    231      */
    232     public long getEmergencyCallbackModeTimeout() {
    233         return mTimeLeft;
    234     }
    235 
    236     /**
    237      * Returns Emergency Callback Mode call state
    238      */
    239     public boolean getEmergencyCallbackModeCallState() {
    240         return mInEmergencyCall;
    241     }
    242 }
    243