EmergencyCallbackModeService.java revision 79b9f6e30e8402b103f1ec3ed9dda1fcad2b1cd5 
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.os.AsyncResult;
29import android.os.Binder;
30import android.os.CountDownTimer;
31import android.os.Handler;
32import android.os.IBinder;
33import android.os.Message;
34import android.os.SystemProperties;
35import android.util.Log;
36
37import com.android.internal.telephony.cdma.CDMAPhone;
38import com.android.internal.telephony.Phone;
39import com.android.internal.telephony.PhoneFactory;
40import com.android.internal.telephony.TelephonyIntents;
41import com.android.internal.telephony.TelephonyProperties;
42
43/**
44 * Application service that inserts/removes Emergency Callback Mode notification and
45 * updates Emergency Callback Mode countdown clock in the notification
46 *
47 * @see EmergencyCallbackModeExitDialog
48 */
49public class EmergencyCallbackModeService extends Service {
50
51    // Default Emergency Callback Mode timeout value
52    private static final int DEFAULT_ECM_EXIT_TIMER_VALUE = 300000;
53    private static final String LOG_TAG = "EmergencyCallbackModeService";
54
55    private NotificationManager mNotificationManager = null;
56    private CountDownTimer mTimer = null;
57    private long mTimeLeft = 0;
58    private Phone mPhone = null;
59    private boolean mInEmergencyCall = false;
60
61    private static final int ECM_TIMER_RESET = 1;
62
63    private Handler mHandler = new Handler () {
64        public void handleMessage(Message msg) {
65            switch (msg.what) {
66                case ECM_TIMER_RESET:
67                    resetEcmTimer((AsyncResult) msg.obj);
68                    break;
69            }
70        }
71    };
72
73    @Override
74    public void onCreate() {
75        // Check if it is CDMA phone
76        if (PhoneFactory.getDefaultPhone().getPhoneType() != Phone.PHONE_TYPE_CDMA) {
77            Log.e(LOG_TAG, "Error! Emergency Callback Mode not supported for " +
78                    PhoneFactory.getDefaultPhone().getPhoneName() + " phones");
79            stopSelf();
80        }
81
82        // Register receiver for intents
83        IntentFilter filter = new IntentFilter();
84        filter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
85        filter.addAction(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS);
86        registerReceiver(mEcmReceiver, filter);
87
88        mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
89
90        // Register ECM timer reset notfication
91        mPhone = PhoneFactory.getDefaultPhone();
92        mPhone.registerForEcmTimerReset(mHandler, ECM_TIMER_RESET, null);
93
94        startTimerNotification();
95    }
96
97    @Override
98    public void onDestroy() {
99        // Unregister receiver
100        unregisterReceiver(mEcmReceiver);
101        // Unregister ECM timer reset notification
102        mPhone.unregisterForEcmTimerReset(mHandler);
103
104        // Cancel the notification and timer
105        mNotificationManager.cancel(R.string.phone_in_ecm_notification_title);
106        mTimer.cancel();
107    }
108
109    /**
110     * Listens for Emergency Callback Mode intents
111     */
112    private BroadcastReceiver mEcmReceiver = new BroadcastReceiver() {
113        @Override
114        public void onReceive(Context context, Intent intent) {
115            // Stop the service when phone exits Emergency Callback Mode
116            if (intent.getAction().equals(
117                    TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) {
118                if (intent.getBooleanExtra("phoneinECMState", false) == false) {
119                    stopSelf();
120                }
121            }
122            // Show dialog box
123            else if (intent.getAction().equals(
124                    TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)) {
125                    context.startActivity(
126                            new Intent(TelephonyIntents.ACTION_SHOW_NOTICE_ECM_BLOCK_OTHERS)
127                    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
128            }
129        }
130    };
131
132    /**
133     * Start timer notification for Emergency Callback Mode
134     */
135    private void startTimerNotification() {
136        // Get Emergency Callback Mode timeout value
137        long ecmTimeout = SystemProperties.getLong(
138                    TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
139
140        // Show the notification
141        showNotification(ecmTimeout);
142
143        // Start countdown timer for the notification updates
144        mTimer = new CountDownTimer(ecmTimeout, 1000) {
145
146            @Override
147            public void onTick(long millisUntilFinished) {
148                mTimeLeft = millisUntilFinished;
149                EmergencyCallbackModeService.this.showNotification(millisUntilFinished);
150            }
151
152            @Override
153            public void onFinish() {
154                //Do nothing
155            }
156
157        }.start();
158    }
159
160    /**
161     * Shows notification for Emergency Callback Mode
162     */
163    private void showNotification(long millisUntilFinished) {
164
165        // Set the icon and text
166        Notification notification = new Notification(
167                R.drawable.picture_emergency25x25,
168                getText(R.string.phone_entered_ecm_text), 0);
169
170        // PendingIntent to launch Emergency Callback Mode Exit activity if the user selects
171        // this notification
172        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
173                new Intent(EmergencyCallbackModeExitDialog.ACTION_SHOW_ECM_EXIT_DIALOG), 0);
174
175        // Format notification string
176        String text = null;
177        if(mInEmergencyCall) {
178            text = getText(R.string.phone_in_ecm_call_notification_text).toString();
179        } else {
180            int minutes = (int)(millisUntilFinished / 60000);
181            String time = String.format("%d:%02d", minutes, (millisUntilFinished % 60000) / 1000);
182            text = String.format(getResources().getQuantityText(
183                     R.plurals.phone_in_ecm_notification_time, minutes).toString(), time);
184        }
185        // Set the info in the notification
186        notification.setLatestEventInfo(this, getText(R.string.phone_in_ecm_notification_title),
187                text, contentIntent);
188
189        notification.flags = Notification.FLAG_ONGOING_EVENT;
190
191        // Show notification
192        mNotificationManager.notify(R.string.phone_in_ecm_notification_title, notification);
193    }
194
195    /**
196     * Handle ECM_TIMER_RESET notification
197     */
198    private void resetEcmTimer(AsyncResult r) {
199        boolean isTimerCanceled = ((Boolean)r.result).booleanValue();
200
201        if (isTimerCanceled) {
202            mInEmergencyCall = true;
203            mTimer.cancel();
204            showNotification(0);
205        } else {
206            mInEmergencyCall = false;
207            startTimerNotification();
208        }
209    }
210
211    @Override
212    public IBinder onBind(Intent intent) {
213        return mBinder;
214    }
215
216    // This is the object that receives interactions from clients.
217    private final IBinder mBinder = new LocalBinder();
218
219    /**
220     * Class for clients to access
221     */
222    public class LocalBinder extends Binder {
223        EmergencyCallbackModeService getService() {
224            return EmergencyCallbackModeService.this;
225        }
226    }
227
228    /**
229     * Returns Emergency Callback Mode timeout value
230     */
231    public long getEmergencyCallbackModeTimeout() {
232        return mTimeLeft;
233    }
234
235    /**
236     * Returns Emergency Callback Mode call state
237     */
238    public boolean getEmergencyCallbackModeCallState() {
239        return mInEmergencyCall;
240    }
241}
242