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
17package com.android.phone;
18
19import android.app.Notification;
20import android.app.NotificationManager;
21import android.app.PendingIntent;
22import android.app.Service;
23import android.content.BroadcastReceiver;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentFilter;
27import android.content.res.Resources;
28import android.graphics.BitmapFactory;
29import android.os.AsyncResult;
30import android.os.Binder;
31import android.os.CountDownTimer;
32import android.os.Handler;
33import android.os.IBinder;
34import android.os.Message;
35import android.os.SystemProperties;
36import android.util.Log;
37
38import com.android.internal.telephony.cdma.CDMAPhone;
39import com.android.internal.telephony.Phone;
40import com.android.internal.telephony.PhoneConstants;
41import com.android.internal.telephony.PhoneFactory;
42import com.android.internal.telephony.TelephonyIntents;
43import 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 */
51public 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