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
onCreate()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
onDestroy()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      */
startTimerNotification()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      */
showNotification(long millisUntilFinished)173     private void showNotification(long millisUntilFinished) {
174         final boolean isInEcm = Boolean.parseBoolean(
175                 SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE));
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      */
resetEcmTimer(AsyncResult r)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
onBind(Intent intent)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 {
getService()241         EmergencyCallbackModeService getService() {
242             return EmergencyCallbackModeService.this;
243         }
244     }
245 
246     /**
247      * Returns Emergency Callback Mode timeout value
248      */
getEmergencyCallbackModeTimeout()249     public long getEmergencyCallbackModeTimeout() {
250         return mTimeLeft;
251     }
252 
253     /**
254      * Returns Emergency Callback Mode call state
255      */
getEmergencyCallbackModeCallState()256     public boolean getEmergencyCallbackModeCallState() {
257         return mInEmergencyCall;
258     }
259 }
260