1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.dialer.phonelookup.emergency;
import android.content.Context;
import com.android.dialer.DialerPhoneNumber;
import com.android.dialer.common.concurrent.Annotations.BackgroundExecutor;
import com.android.dialer.inject.ApplicationContext;
import com.android.dialer.phonelookup.PhoneLookup;
import com.android.dialer.phonelookup.PhoneLookupInfo;
import com.android.dialer.phonelookup.PhoneLookupInfo.EmergencyInfo;
import com.android.dialer.phonenumberutil.PhoneNumberHelper;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import javax.inject.Inject;
/**
* PhoneLookup implementation for checking if a number is an emergency number.
*
* <p>The check has to be done in a PhoneLookup as it involves detecting the user's location and
* obtaining SIM info, which are expensive operations. Doing it in the main thread will make the UI
* super janky.
*/
public class EmergencyPhoneLookup implements PhoneLookup<EmergencyInfo> {
private final Context appContext;
private final ListeningExecutorService backgroundExecutorService;
@Inject
EmergencyPhoneLookup(
@ApplicationContext Context appContext,
@BackgroundExecutor ListeningExecutorService backgroundExecutorService) {
this.appContext = appContext;
this.backgroundExecutorService = backgroundExecutorService;
}
@Override
public ListenableFuture<EmergencyInfo> lookup(DialerPhoneNumber dialerPhoneNumber) {
return backgroundExecutorService.submit(
() ->
EmergencyInfo.newBuilder()
.setIsEmergencyNumber(
PhoneNumberHelper.isLocalEmergencyNumber(
appContext, dialerPhoneNumber.getNormalizedNumber()))
.build());
}
@Override
public ListenableFuture<Boolean> isDirty(ImmutableSet<DialerPhoneNumber> phoneNumbers) {
return Futures.immediateFuture(false);
}
@Override
public ListenableFuture<ImmutableMap<DialerPhoneNumber, EmergencyInfo>> getMostRecentInfo(
ImmutableMap<DialerPhoneNumber, EmergencyInfo> existingInfoMap) {
// We can update EmergencyInfo for all numbers in the provided map, but the negative impact on
// performance is intolerable as checking a single number involves detecting the user's location
// and obtaining SIM info, which will take more than 100ms (see
// android.telephony.PhoneNumberUtils#isLocalEmergencyNumber(Context, int, String) for details).
//
// As emergency numbers won't change in a country, the only case we will miss is that
// (1) a number is an emergency number in country A but not in country B,
// (2) a user has an emergency call entry when they are in country A, and
// (3) they travel from A to B,
// which is a rare event.
//
// We can update the implementation if telecom supports batch check in the future.
return Futures.immediateFuture(existingInfoMap);
}
@Override
public void setSubMessage(PhoneLookupInfo.Builder destination, EmergencyInfo subMessage) {
destination.setEmergencyInfo(subMessage);
}
@Override
public EmergencyInfo getSubMessage(PhoneLookupInfo phoneLookupInfo) {
return phoneLookupInfo.getEmergencyInfo();
}
@Override
public ListenableFuture<Void> onSuccessfulBulkUpdate() {
return Futures.immediateFuture(null);
}
@Override
public void registerContentObservers() {
// No content observer to register.
}
@Override
public void unregisterContentObservers() {
// Nothing to be done as no content observer is registered.
}
@Override
public ListenableFuture<Void> clearData() {
return Futures.immediateFuture(null);
}
@Override
public String getLoggingName() {
return "EmergencyPhoneLookup";
}
}
|
