1 /*
2  * Copyright 2014, 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.server.telecom;
18 
19 import android.content.ComponentName;
20 import android.content.Context;
21 import android.net.Uri;
22 import android.telecom.PhoneAccount;
23 import android.telecom.PhoneAccountHandle;
24 import android.telephony.PhoneNumberUtils;
25 
26 import com.android.internal.annotations.VisibleForTesting;
27 
28 /**
29  * Utilities to deal with the system telephony services. The system telephony services are treated
30  * differently from 3rd party services in some situations (emergency calls, audio focus, etc...).
31  */
32 public final class TelephonyUtil {
33     private static final String TELEPHONY_PACKAGE_NAME = "com.android.phone";
34 
35     private static final String PSTN_CALL_SERVICE_CLASS_NAME =
36             "com.android.services.telephony.TelephonyConnectionService";
37 
38     private static final PhoneAccountHandle DEFAULT_EMERGENCY_PHONE_ACCOUNT_HANDLE =
39             new PhoneAccountHandle(
40                     new ComponentName(TELEPHONY_PACKAGE_NAME, PSTN_CALL_SERVICE_CLASS_NAME), "E");
41 
TelephonyUtil()42     private TelephonyUtil() {}
43 
44     /**
45      * @return fallback {@link PhoneAccount} to be used by Telecom for emergency calls in the
46      * rare case that Telephony has not registered any phone accounts yet. Details about this
47      * account are not expected to be displayed in the UI, so the description, etc are not
48      * populated.
49      */
50     @VisibleForTesting
getDefaultEmergencyPhoneAccount()51     public static PhoneAccount getDefaultEmergencyPhoneAccount() {
52         return PhoneAccount.builder(DEFAULT_EMERGENCY_PHONE_ACCOUNT_HANDLE, "E")
53                 .setCapabilities(PhoneAccount.CAPABILITY_SIM_SUBSCRIPTION |
54                         PhoneAccount.CAPABILITY_CALL_PROVIDER |
55                         PhoneAccount.CAPABILITY_PLACE_EMERGENCY_CALLS)
56                 .setIsEnabled(true)
57                 .build();
58     }
59 
isPstnComponentName(ComponentName componentName)60     static boolean isPstnComponentName(ComponentName componentName) {
61         final ComponentName pstnComponentName = new ComponentName(
62                 TELEPHONY_PACKAGE_NAME, PSTN_CALL_SERVICE_CLASS_NAME);
63         return pstnComponentName.equals(componentName);
64     }
65 
shouldProcessAsEmergency(Context context, Uri handle)66     public static boolean shouldProcessAsEmergency(Context context, Uri handle) {
67         return handle != null && PhoneNumberUtils.isLocalEmergencyNumber(
68                 context, handle.getSchemeSpecificPart());
69     }
70 }
71