summaryrefslogtreecommitdiffstats
path: root/telecomm/java/android/telecom/Call.java
blob: e756a577613f130532ddc240e536c3084b8c8715 (plain)
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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
/*
 * Copyright (C) 2014 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 android.telecom;

import android.annotation.SystemApi;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;

import java.lang.String;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * Represents an ongoing phone call that the in-call app should present to the user.
 */
public final class Call {
    /**
     * The state of a {@code Call} when newly created.
     */
    public static final int STATE_NEW = 0;

    /**
     * The state of an outgoing {@code Call} when dialing the remote number, but not yet connected.
     */
    public static final int STATE_DIALING = 1;

    /**
     * The state of an incoming {@code Call} when ringing locally, but not yet connected.
     */
    public static final int STATE_RINGING = 2;

    /**
     * The state of a {@code Call} when in a holding state.
     */
    public static final int STATE_HOLDING = 3;

    /**
     * The state of a {@code Call} when actively supporting conversation.
     */
    public static final int STATE_ACTIVE = 4;

    /**
     * The state of a {@code Call} when no further voice or other communication is being
     * transmitted, the remote side has been or will inevitably be informed that the {@code Call}
     * is no longer active, and the local data transport has or inevitably will release resources
     * associated with this {@code Call}.
     */
    public static final int STATE_DISCONNECTED = 7;

    /**
     * The state of an outgoing {@code Call} when waiting on user to select a
     * {@link PhoneAccount} through which to place the call.
     */
    public static final int STATE_SELECT_PHONE_ACCOUNT = 8;

    /**
     * @hide
     * @deprecated use STATE_SELECT_PHONE_ACCOUNT.
     */
    @Deprecated
    @SystemApi
    public static final int STATE_PRE_DIAL_WAIT = STATE_SELECT_PHONE_ACCOUNT;

    /**
     * The initial state of an outgoing {@code Call}.
     * Common transitions are to {@link #STATE_DIALING} state for a successful call or
     * {@link #STATE_DISCONNECTED} if it failed.
     */
    public static final int STATE_CONNECTING = 9;

    /**
     * The state of a {@code Call} when the user has initiated a disconnection of the call, but the
     * call has not yet been disconnected by the underlying {@code ConnectionService}.  The next
     * state of the call is (potentially) {@link #STATE_DISCONNECTED}.
     */
    public static final int STATE_DISCONNECTING = 10;

    /**
     * The key to retrieve the optional {@code PhoneAccount}s Telecom can bundle with its Call
     * extras. Used to pass the phone accounts to display on the front end to the user in order to
     * select phone accounts to (for example) place a call.
     */
    public static final String AVAILABLE_PHONE_ACCOUNTS = "selectPhoneAccountAccounts";

    public static class Details {

        /** Call can currently be put on hold or unheld. */
        public static final int CAPABILITY_HOLD = 0x00000001;

        /** Call supports the hold feature. */
        public static final int CAPABILITY_SUPPORT_HOLD = 0x00000002;

        /**
         * Calls within a conference can be merged. A {@link ConnectionService} has the option to
         * add a {@link Conference} call before the child {@link Connection}s are merged. This is how
         * CDMA-based {@link Connection}s are implemented. For these unmerged {@link Conference}s, this
         * capability allows a merge button to be shown while the conference call is in the foreground
         * of the in-call UI.
         * <p>
         * This is only intended for use by a {@link Conference}.
         */
        public static final int CAPABILITY_MERGE_CONFERENCE = 0x00000004;

        /**
         * Calls within a conference can be swapped between foreground and background.
         * See {@link #CAPABILITY_MERGE_CONFERENCE} for additional information.
         * <p>
         * This is only intended for use by a {@link Conference}.
         */
        public static final int CAPABILITY_SWAP_CONFERENCE = 0x00000008;

        /**
         * @hide
         */
        public static final int CAPABILITY_UNUSED_1 = 0x00000010;

        /** Call supports responding via text option. */
        public static final int CAPABILITY_RESPOND_VIA_TEXT = 0x00000020;

        /** Call can be muted. */
        public static final int CAPABILITY_MUTE = 0x00000040;

        /**
         * Call supports conference call management. This capability only applies to {@link Conference}
         * calls which can have {@link Connection}s as children.
         */
        public static final int CAPABILITY_MANAGE_CONFERENCE = 0x00000080;

        /**
         * Local device supports receiving video.
         */
        public static final int CAPABILITY_SUPPORTS_VT_LOCAL_RX = 0x00000100;

        /**
         * Local device supports transmitting video.
         */
        public static final int CAPABILITY_SUPPORTS_VT_LOCAL_TX = 0x00000200;

        /**
         * Local device supports bidirectional video calling.
         */
        public static final int CAPABILITY_SUPPORTS_VT_LOCAL_BIDIRECTIONAL =
                CAPABILITY_SUPPORTS_VT_LOCAL_RX | CAPABILITY_SUPPORTS_VT_LOCAL_TX;

        /**
         * Remote device supports receiving video.
         */
        public static final int CAPABILITY_SUPPORTS_VT_REMOTE_RX = 0x00000400;

        /**
         * Remote device supports transmitting video.
         */
        public static final int CAPABILITY_SUPPORTS_VT_REMOTE_TX = 0x00000800;

        /**
         * Remote device supports bidirectional video calling.
         */
        public static final int CAPABILITY_SUPPORTS_VT_REMOTE_BIDIRECTIONAL =
                CAPABILITY_SUPPORTS_VT_REMOTE_RX | CAPABILITY_SUPPORTS_VT_REMOTE_TX;

        /**
         * Call is able to be separated from its parent {@code Conference}, if any.
         */
        public static final int CAPABILITY_SEPARATE_FROM_CONFERENCE = 0x00001000;

        /**
         * Call is able to be individually disconnected when in a {@code Conference}.
         */
        public static final int CAPABILITY_DISCONNECT_FROM_CONFERENCE = 0x00002000;

        /**
         * Speed up audio setup for MT call.
         * @hide
         */
        public static final int CAPABILITY_SPEED_UP_MT_AUDIO = 0x00040000;

        /**
         * Call can be upgraded to a video call.
         * @hide
         */
        public static final int CAPABILITY_CAN_UPGRADE_TO_VIDEO = 0x00080000;

        /**
         * For video calls, indicates whether the outgoing video for the call can be paused using
         * the {@link android.telecom.VideoProfile#STATE_PAUSED} VideoState.
         */
        public static final int CAPABILITY_CAN_PAUSE_VIDEO = 0x00100000;

        //******************************************************************************************
        // Next CAPABILITY value: 0x00004000
        //******************************************************************************************

        /**
         * Whether the call is currently a conference.
         */
        public static final int PROPERTY_CONFERENCE = 0x00000001;

        /**
         * Whether the call is a generic conference, where we do not know the precise state of
         * participants in the conference (eg. on CDMA).
         */
        public static final int PROPERTY_GENERIC_CONFERENCE = 0x00000002;

        /**
         * Whether the call is made while the device is in emergency callback mode.
         */
        public static final int PROPERTY_EMERGENCY_CALLBACK_MODE = 0x00000004;

        /**
         * Connection is using WIFI.
         */
        public static final int PROPERTY_WIFI = 0x00000008;

        /**
         * Call is using high definition audio.
         */
        public static final int PROPERTY_HIGH_DEF_AUDIO = 0x00000010;

        //******************************************************************************************
        // Next PROPERTY value: 0x00000020
        //******************************************************************************************

        private final Uri mHandle;
        private final int mHandlePresentation;
        private final String mCallerDisplayName;
        private final int mCallerDisplayNamePresentation;
        private final PhoneAccountHandle mAccountHandle;
        private final int mCallCapabilities;
        private final int mCallProperties;
        private final DisconnectCause mDisconnectCause;
        private final long mConnectTimeMillis;
        private final GatewayInfo mGatewayInfo;
        private final int mVideoState;
        private final StatusHints mStatusHints;
        private final Bundle mExtras;
        private final Bundle mIntentExtras;

        /**
         * Whether the supplied capabilities  supports the specified capability.
         *
         * @param capabilities A bit field of capabilities.
         * @param capability The capability to check capabilities for.
         * @return Whether the specified capability is supported.
         */
        public static boolean can(int capabilities, int capability) {
            return (capabilities & capability) != 0;
        }

        /**
         * Whether the capabilities of this {@code Details} supports the specified capability.
         *
         * @param capability The capability to check capabilities for.
         * @return Whether the specified capability is supported.
         */
        public boolean can(int capability) {
            return can(mCallCapabilities, capability);
        }

        /**
         * Render a set of capability bits ({@code CAPABILITY_*}) as a human readable string.
         *
         * @param capabilities A capability bit field.
         * @return A human readable string representation.
         */
        public static String capabilitiesToString(int capabilities) {
            StringBuilder builder = new StringBuilder();
            builder.append("[Capabilities:");
            if (can(capabilities, CAPABILITY_HOLD)) {
                builder.append(" CAPABILITY_HOLD");
            }
            if (can(capabilities, CAPABILITY_SUPPORT_HOLD)) {
                builder.append(" CAPABILITY_SUPPORT_HOLD");
            }
            if (can(capabilities, CAPABILITY_MERGE_CONFERENCE)) {
                builder.append(" CAPABILITY_MERGE_CONFERENCE");
            }
            if (can(capabilities, CAPABILITY_SWAP_CONFERENCE)) {
                builder.append(" CAPABILITY_SWAP_CONFERENCE");
            }
            if (can(capabilities, CAPABILITY_RESPOND_VIA_TEXT)) {
                builder.append(" CAPABILITY_RESPOND_VIA_TEXT");
            }
            if (can(capabilities, CAPABILITY_MUTE)) {
                builder.append(" CAPABILITY_MUTE");
            }
            if (can(capabilities, CAPABILITY_MANAGE_CONFERENCE)) {
                builder.append(" CAPABILITY_MANAGE_CONFERENCE");
            }
            if (can(capabilities, CAPABILITY_SUPPORTS_VT_LOCAL_RX)) {
                builder.append(" CAPABILITY_SUPPORTS_VT_LOCAL_RX");
            }
            if (can(capabilities, CAPABILITY_SUPPORTS_VT_LOCAL_TX)) {
                builder.append(" CAPABILITY_SUPPORTS_VT_LOCAL_TX");
            }
            if (can(capabilities, CAPABILITY_SUPPORTS_VT_LOCAL_BIDIRECTIONAL)) {
                builder.append(" CAPABILITY_SUPPORTS_VT_LOCAL_BIDIRECTIONAL");
            }
            if (can(capabilities, CAPABILITY_SUPPORTS_VT_REMOTE_RX)) {
                builder.append(" CAPABILITY_SUPPORTS_VT_REMOTE_RX");
            }
            if (can(capabilities, CAPABILITY_SUPPORTS_VT_REMOTE_TX)) {
                builder.append(" CAPABILITY_SUPPORTS_VT_REMOTE_TX");
            }
            if (can(capabilities, CAPABILITY_SUPPORTS_VT_REMOTE_BIDIRECTIONAL)) {
                builder.append(" CAPABILITY_SUPPORTS_VT_REMOTE_BIDIRECTIONAL");
            }
            if (can(capabilities, CAPABILITY_SPEED_UP_MT_AUDIO)) {
                builder.append(" CAPABILITY_SPEED_UP_MT_AUDIO");
            }
            if (can(capabilities, CAPABILITY_CAN_UPGRADE_TO_VIDEO)) {
                builder.append(" CAPABILITY_CAN_UPGRADE_TO_VIDEO");
            }
            if (can(capabilities, CAPABILITY_CAN_PAUSE_VIDEO)) {
                builder.append(" CAPABILITY_CAN_PAUSE_VIDEO");
            }
            builder.append("]");
            return builder.toString();
        }

        /**
         * Whether the supplied properties includes the specified property.
         *
         * @param properties A bit field of properties.
         * @param property The property to check properties for.
         * @return Whether the specified property is supported.
         */
        public static boolean hasProperty(int properties, int property) {
            return (properties & property) != 0;
        }

        /**
         * Whether the properties of this {@code Details} includes the specified property.
         *
         * @param property The property to check properties for.
         * @return Whether the specified property is supported.
         */
        public boolean hasProperty(int property) {
            return hasProperty(mCallProperties, property);
        }

        /**
         * Render a set of property bits ({@code PROPERTY_*}) as a human readable string.
         *
         * @param properties A property bit field.
         * @return A human readable string representation.
         */
        public static String propertiesToString(int properties) {
            StringBuilder builder = new StringBuilder();
            builder.append("[Properties:");
            if (hasProperty(properties, PROPERTY_CONFERENCE)) {
                builder.append(" PROPERTY_CONFERENCE");
            }
            if (hasProperty(properties, PROPERTY_GENERIC_CONFERENCE)) {
                builder.append(" PROPERTY_GENERIC_CONFERENCE");
            }
            if (hasProperty(properties, PROPERTY_WIFI)) {
                builder.append(" PROPERTY_WIFI");
            }
            if (hasProperty(properties, PROPERTY_HIGH_DEF_AUDIO)) {
                builder.append(" PROPERTY_HIGH_DEF_AUDIO");
            }
            if (hasProperty(properties, PROPERTY_EMERGENCY_CALLBACK_MODE)) {
                builder.append(" PROPERTY_EMERGENCY_CALLBACK_MODE");
            }
            builder.append("]");
            return builder.toString();
        }

        /**
         * @return The handle (e.g., phone number) to which the {@code Call} is currently
         * connected.
         */
        public Uri getHandle() {
            return mHandle;
        }

        /**
         * @return The presentation requirements for the handle. See
         * {@link TelecomManager} for valid values.
         */
        public int getHandlePresentation() {
            return mHandlePresentation;
        }

        /**
         * @return The display name for the caller.
         */
        public String getCallerDisplayName() {
            return mCallerDisplayName;
        }

        /**
         * @return The presentation requirements for the caller display name. See
         * {@link TelecomManager} for valid values.
         */
        public int getCallerDisplayNamePresentation() {
            return mCallerDisplayNamePresentation;
        }

        /**
         * @return The {@code PhoneAccountHandle} whereby the {@code Call} is currently being
         * routed.
         */
        public PhoneAccountHandle getAccountHandle() {
            return mAccountHandle;
        }

        /**
         * @return A bitmask of the capabilities of the {@code Call}, as defined by the various
         *         {@code CAPABILITY_*} constants in this class.
         */
        public int getCallCapabilities() {
            return mCallCapabilities;
        }

        /**
         * @return A bitmask of the properties of the {@code Call}, as defined by the various
         *         {@code PROPERTY_*} constants in this class.
         */
        public int getCallProperties() {
            return mCallProperties;
        }

        /**
         * @return For a {@link #STATE_DISCONNECTED} {@code Call}, the disconnect cause expressed
         * by {@link android.telecom.DisconnectCause}.
         */
        public DisconnectCause getDisconnectCause() {
            return mDisconnectCause;
        }

        /**
         * @return The time the {@code Call} has been connected. This information is updated
         * periodically, but user interfaces should not rely on this to display any "call time
         * clock".
         */
        public final long getConnectTimeMillis() {
            return mConnectTimeMillis;
        }

        /**
         * @return Information about any calling gateway the {@code Call} may be using.
         */
        public GatewayInfo getGatewayInfo() {
            return mGatewayInfo;
        }

        /**
         * @return The video state of the {@code Call}.
         */
        public int getVideoState() {
            return mVideoState;
        }

        /**
         * @return The current {@link android.telecom.StatusHints}, or {@code null} if none
         * have been set.
         */
        public StatusHints getStatusHints() {
            return mStatusHints;
        }

        /**
         * @return The extras associated with this call.
         */
        public Bundle getExtras() {
            return mExtras;
        }

        /**
         * @return The extras used with the original intent to place this call.
         */
        public Bundle getIntentExtras() {
            return mIntentExtras;
        }

        @Override
        public boolean equals(Object o) {
            if (o instanceof Details) {
                Details d = (Details) o;
                return
                        Objects.equals(mHandle, d.mHandle) &&
                        Objects.equals(mHandlePresentation, d.mHandlePresentation) &&
                        Objects.equals(mCallerDisplayName, d.mCallerDisplayName) &&
                        Objects.equals(mCallerDisplayNamePresentation,
                                d.mCallerDisplayNamePresentation) &&
                        Objects.equals(mAccountHandle, d.mAccountHandle) &&
                        Objects.equals(mCallCapabilities, d.mCallCapabilities) &&
                        Objects.equals(mCallProperties, d.mCallProperties) &&
                        Objects.equals(mDisconnectCause, d.mDisconnectCause) &&
                        Objects.equals(mConnectTimeMillis, d.mConnectTimeMillis) &&
                        Objects.equals(mGatewayInfo, d.mGatewayInfo) &&
                        Objects.equals(mVideoState, d.mVideoState) &&
                        Objects.equals(mStatusHints, d.mStatusHints) &&
                        Objects.equals(mExtras, d.mExtras) &&
                        Objects.equals(mIntentExtras, d.mIntentExtras);
            }
            return false;
        }

        @Override
        public int hashCode() {
            return
                    Objects.hashCode(mHandle) +
                    Objects.hashCode(mHandlePresentation) +
                    Objects.hashCode(mCallerDisplayName) +
                    Objects.hashCode(mCallerDisplayNamePresentation) +
                    Objects.hashCode(mAccountHandle) +
                    Objects.hashCode(mCallCapabilities) +
                    Objects.hashCode(mCallProperties) +
                    Objects.hashCode(mDisconnectCause) +
                    Objects.hashCode(mConnectTimeMillis) +
                    Objects.hashCode(mGatewayInfo) +
                    Objects.hashCode(mVideoState) +
                    Objects.hashCode(mStatusHints) +
                    Objects.hashCode(mExtras) +
                    Objects.hashCode(mIntentExtras);
        }

        /** {@hide} */
        public Details(
                Uri handle,
                int handlePresentation,
                String callerDisplayName,
                int callerDisplayNamePresentation,
                PhoneAccountHandle accountHandle,
                int capabilities,
                int properties,
                DisconnectCause disconnectCause,
                long connectTimeMillis,
                GatewayInfo gatewayInfo,
                int videoState,
                StatusHints statusHints,
                Bundle extras,
                Bundle intentExtras) {
            mHandle = handle;
            mHandlePresentation = handlePresentation;
            mCallerDisplayName = callerDisplayName;
            mCallerDisplayNamePresentation = callerDisplayNamePresentation;
            mAccountHandle = accountHandle;
            mCallCapabilities = capabilities;
            mCallProperties = properties;
            mDisconnectCause = disconnectCause;
            mConnectTimeMillis = connectTimeMillis;
            mGatewayInfo = gatewayInfo;
            mVideoState = videoState;
            mStatusHints = statusHints;
            mExtras = extras;
            mIntentExtras = intentExtras;
        }
    }

    public static abstract class Callback {
        /**
         * Invoked when the state of this {@code Call} has changed. See {@link #getState()}.
         *
         * @param call The {@code Call} invoking this method.
         * @param state The new state of the {@code Call}.
         */
        public void onStateChanged(Call call, int state) {}

        /**
         * Invoked when the parent of this {@code Call} has changed. See {@link #getParent()}.
         *
         * @param call The {@code Call} invoking this method.
         * @param parent The new parent of the {@code Call}.
         */
        public void onParentChanged(Call call, Call parent) {}

        /**
         * Invoked when the children of this {@code Call} have changed. See {@link #getChildren()}.
         *
         * @param call The {@code Call} invoking this method.
         * @param children The new children of the {@code Call}.
         */
        public void onChildrenChanged(Call call, List<Call> children) {}

        /**
         * Invoked when the details of this {@code Call} have changed. See {@link #getDetails()}.
         *
         * @param call The {@code Call} invoking this method.
         * @param details A {@code Details} object describing the {@code Call}.
         */
        public void onDetailsChanged(Call call, Details details) {}

        /**
         * Invoked when the text messages that can be used as responses to the incoming
         * {@code Call} are loaded from the relevant database.
         * See {@link #getCannedTextResponses()}.
         *
         * @param call The {@code Call} invoking this method.
         * @param cannedTextResponses The text messages useable as responses.
         */
        public void onCannedTextResponsesLoaded(Call call, List<String> cannedTextResponses) {}

        /**
         * Invoked when the post-dial sequence in the outgoing {@code Call} has reached a pause
         * character. This causes the post-dial signals to stop pending user confirmation. An
         * implementation should present this choice to the user and invoke
         * {@link #postDialContinue(boolean)} when the user makes the choice.
         *
         * @param call The {@code Call} invoking this method.
         * @param remainingPostDialSequence The post-dial characters that remain to be sent.
         */
        public void onPostDialWait(Call call, String remainingPostDialSequence) {}

        /**
         * Invoked when the {@code Call.VideoCall} of the {@code Call} has changed.
         *
         * @param call The {@code Call} invoking this method.
         * @param videoCall The {@code Call.VideoCall} associated with the {@code Call}.
         */
        public void onVideoCallChanged(Call call, InCallService.VideoCall videoCall) {}

        /**
         * Invoked when the {@code Call} is destroyed. Clients should refrain from cleaning
         * up their UI for the {@code Call} in response to state transitions. Specifically,
         * clients should not assume that a {@link #onStateChanged(Call, int)} with a state of
         * {@link #STATE_DISCONNECTED} is the final notification the {@code Call} will send. Rather,
         * clients should wait for this method to be invoked.
         *
         * @param call The {@code Call} being destroyed.
         */
        public void onCallDestroyed(Call call) {}

        /**
         * Invoked upon changes to the set of {@code Call}s with which this {@code Call} can be
         * conferenced.
         *
         * @param call The {@code Call} being updated.
         * @param conferenceableCalls The {@code Call}s with which this {@code Call} can be
         *          conferenced.
         */
        public void onConferenceableCallsChanged(Call call, List<Call> conferenceableCalls) {}
    }

    /**
     * @deprecated Use {@code Call.Callback} instead.
     * @hide
     */
    @Deprecated
    @SystemApi
    public static abstract class Listener extends Callback { }

    private final Phone mPhone;
    private final String mTelecomCallId;
    private final InCallAdapter mInCallAdapter;
    private final List<String> mChildrenIds = new ArrayList<>();
    private final List<Call> mChildren = new ArrayList<>();
    private final List<Call> mUnmodifiableChildren = Collections.unmodifiableList(mChildren);
    private final List<CallbackRecord<Callback>> mCallbackRecords = new CopyOnWriteArrayList<>();
    private final List<Call> mConferenceableCalls = new ArrayList<>();
    private final List<Call> mUnmodifiableConferenceableCalls =
            Collections.unmodifiableList(mConferenceableCalls);

    private boolean mChildrenCached;
    private String mParentId = null;
    private int mState;
    private List<String> mCannedTextResponses = null;
    private String mRemainingPostDialSequence;
    private InCallService.VideoCall mVideoCall;
    private Details mDetails;

    /**
     * Obtains the post-dial sequence remaining to be emitted by this {@code Call}, if any.
     *
     * @return The remaining post-dial sequence, or {@code null} if there is no post-dial sequence
     * remaining or this {@code Call} is not in a post-dial state.
     */
    public String getRemainingPostDialSequence() {
        return mRemainingPostDialSequence;
    }

    /**
     * Instructs this {@link #STATE_RINGING} {@code Call} to answer.
     * @param videoState The video state in which to answer the call.
     */
    public void answer(int videoState) {
        mInCallAdapter.answerCall(mTelecomCallId, videoState);
    }

    /**
     * Instructs this {@link #STATE_RINGING} {@code Call} to reject.
     *
     * @param rejectWithMessage Whether to reject with a text message.
     * @param textMessage An optional text message with which to respond.
     */
    public void reject(boolean rejectWithMessage, String textMessage) {
        mInCallAdapter.rejectCall(mTelecomCallId, rejectWithMessage, textMessage);
    }

    /**
     * Instructs this {@code Call} to disconnect.
     */
    public void disconnect() {
        mInCallAdapter.disconnectCall(mTelecomCallId);
    }

    /**
     * Instructs this {@code Call} to go on hold.
     */
    public void hold() {
        mInCallAdapter.holdCall(mTelecomCallId);
    }

    /**
     * Instructs this {@link #STATE_HOLDING} call to release from hold.
     */
    public void unhold() {
        mInCallAdapter.unholdCall(mTelecomCallId);
    }

    /**
     * Instructs this {@code Call} to play a dual-tone multi-frequency signaling (DTMF) tone.
     *
     * Any other currently playing DTMF tone in the specified call is immediately stopped.
     *
     * @param digit A character representing the DTMF digit for which to play the tone. This
     *         value must be one of {@code '0'} through {@code '9'}, {@code '*'} or {@code '#'}.
     */
    public void playDtmfTone(char digit) {
        mInCallAdapter.playDtmfTone(mTelecomCallId, digit);
    }

    /**
     * Instructs this {@code Call} to stop any dual-tone multi-frequency signaling (DTMF) tone
     * currently playing.
     *
     * DTMF tones are played by calling {@link #playDtmfTone(char)}. If no DTMF tone is
     * currently playing, this method will do nothing.
     */
    public void stopDtmfTone() {
        mInCallAdapter.stopDtmfTone(mTelecomCallId);
    }

    /**
     * Instructs this {@code Call} to continue playing a post-dial DTMF string.
     *
     * A post-dial DTMF string is a string of digits entered after a phone number, when dialed,
     * that are immediately sent as DTMF tones to the recipient as soon as the connection is made.
     *
     * If the DTMF string contains a {@link TelecomManager#DTMF_CHARACTER_PAUSE} symbol, this
     * {@code Call} will temporarily pause playing the tones for a pre-defined period of time.
     *
     * If the DTMF string contains a {@link TelecomManager#DTMF_CHARACTER_WAIT} symbol, this
     * {@code Call} will pause playing the tones and notify callbacks via
     * {@link Callback#onPostDialWait(Call, String)}. At this point, the in-call app
     * should display to the user an indication of this state and an affordance to continue
     * the postdial sequence. When the user decides to continue the postdial sequence, the in-call
     * app should invoke the {@link #postDialContinue(boolean)} method.
     *
     * @param proceed Whether or not to continue with the post-dial sequence.
     */
    public void postDialContinue(boolean proceed) {
        mInCallAdapter.postDialContinue(mTelecomCallId, proceed);
    }

    /**
     * Notifies this {@code Call} that an account has been selected and to proceed with placing
     * an outgoing call. Optionally sets this account as the default account.
     */
    public void phoneAccountSelected(PhoneAccountHandle accountHandle, boolean setDefault) {
        mInCallAdapter.phoneAccountSelected(mTelecomCallId, accountHandle, setDefault);

    }

    /**
     * Instructs this {@code Call} to enter a conference.
     *
     * @param callToConferenceWith The other call with which to conference.
     */
    public void conference(Call callToConferenceWith) {
        if (callToConferenceWith != null) {
            mInCallAdapter.conference(mTelecomCallId, callToConferenceWith.mTelecomCallId);
        }
    }

    /**
     * Instructs this {@code Call} to split from any conference call with which it may be
     * connected.
     */
    public void splitFromConference() {
        mInCallAdapter.splitFromConference(mTelecomCallId);
    }

    /**
     * Merges the calls within this conference. See {@link Details#CAPABILITY_MERGE_CONFERENCE}.
     */
    public void mergeConference() {
        mInCallAdapter.mergeConference(mTelecomCallId);
    }

    /**
     * Swaps the calls within this conference. See {@link Details#CAPABILITY_SWAP_CONFERENCE}.
     */
    public void swapConference() {
        mInCallAdapter.swapConference(mTelecomCallId);
    }

    /**
     * Obtains the parent of this {@code Call} in a conference, if any.
     *
     * @return The parent {@code Call}, or {@code null} if this {@code Call} is not a
     * child of any conference {@code Call}s.
     */
    public Call getParent() {
        if (mParentId != null) {
            return mPhone.internalGetCallByTelecomId(mParentId);
        }
        return null;
    }

    /**
     * Obtains the children of this conference {@code Call}, if any.
     *
     * @return The children of this {@code Call} if this {@code Call} is a conference, or an empty
     * {@code List} otherwise.
     */
    public List<Call> getChildren() {
        if (!mChildrenCached) {
            mChildrenCached = true;
            mChildren.clear();

            for(String id : mChildrenIds) {
                Call call = mPhone.internalGetCallByTelecomId(id);
                if (call == null) {
                    // At least one child was still not found, so do not save true for "cached"
                    mChildrenCached = false;
                } else {
                    mChildren.add(call);
                }
            }
        }

        return mUnmodifiableChildren;
    }

    /**
     * Returns the list of {@code Call}s with which this {@code Call} is allowed to conference.
     *
     * @return The list of conferenceable {@code Call}s.
     */
    public List<Call> getConferenceableCalls() {
        return mUnmodifiableConferenceableCalls;
    }

    /**
     * Obtains the state of this {@code Call}.
     *
     * @return A state value, chosen from the {@code STATE_*} constants.
     */
    public int getState() {
        return mState;
    }

    /**
     * Obtains a list of canned, pre-configured message responses to present to the user as
     * ways of rejecting this {@code Call} using via a text message.
     *
     * @see #reject(boolean, String)
     *
     * @return A list of canned text message responses.
     */
    public List<String> getCannedTextResponses() {
        return mCannedTextResponses;
    }

    /**
     * Obtains an object that can be used to display video from this {@code Call}.
     *
     * @return An {@code Call.VideoCall}.
     */
    public InCallService.VideoCall getVideoCall() {
        return mVideoCall;
    }

    /**
     * Obtains an object containing call details.
     *
     * @return A {@link Details} object. Depending on the state of the {@code Call}, the
     * result may be {@code null}.
     */
    public Details getDetails() {
        return mDetails;
    }

    /**
     * Registers a callback to this {@code Call}.
     *
     * @param callback A {@code Callback}.
     */
    public void registerCallback(Callback callback) {
        registerCallback(callback, new Handler());
    }

    /**
     * Registers a callback to this {@code Call}.
     *
     * @param callback A {@code Callback}.
     * @param handler A handler which command and status changes will be delivered to.
     */
    public void registerCallback(Callback callback, Handler handler) {
        unregisterCallback(callback);
        if (callback != null && handler != null) {
            mCallbackRecords.add(new CallbackRecord<Callback>(callback, handler));
        }
    }

    /**
     * Unregisters a callback from this {@code Call}.
     *
     * @param callback A {@code Callback}.
     */
    public void unregisterCallback(Callback callback) {
        if (callback != null) {
            for (CallbackRecord<Callback> record : mCallbackRecords) {
                if (record.getCallback() == callback) {
                    mCallbackRecords.remove(record);
                    break;
                }
            }
        }
    }

    /**
     * Adds a listener to this {@code Call}.
     *
     * @param listener A {@code Listener}.
     * @deprecated Use {@link #registerCallback} instead.
     * @hide
     */
    @Deprecated
    @SystemApi
    public void addListener(Listener listener) {
        registerCallback(listener);
    }

    /**
     * Removes a listener from this {@code Call}.
     *
     * @param listener A {@code Listener}.
     * @deprecated Use {@link #unregisterCallback} instead.
     * @hide
     */
    @Deprecated
    @SystemApi
    public void removeListener(Listener listener) {
        unregisterCallback(listener);
    }


    /** {@hide} */
    Call(Phone phone, String telecomCallId, InCallAdapter inCallAdapter) {
        mPhone = phone;
        mTelecomCallId = telecomCallId;
        mInCallAdapter = inCallAdapter;
        mState = STATE_NEW;
    }

    /** {@hide} */
    final String internalGetCallId() {
        return mTelecomCallId;
    }

    /** {@hide} */
    final void internalUpdate(ParcelableCall parcelableCall, Map<String, Call> callIdMap) {
        // First, we update the internal state as far as possible before firing any updates.
        Details details = new Details(
                parcelableCall.getHandle(),
                parcelableCall.getHandlePresentation(),
                parcelableCall.getCallerDisplayName(),
                parcelableCall.getCallerDisplayNamePresentation(),
                parcelableCall.getAccountHandle(),
                parcelableCall.getCapabilities(),
                parcelableCall.getProperties(),
                parcelableCall.getDisconnectCause(),
                parcelableCall.getConnectTimeMillis(),
                parcelableCall.getGatewayInfo(),
                parcelableCall.getVideoState(),
                parcelableCall.getStatusHints(),
                parcelableCall.getExtras(),
                parcelableCall.getIntentExtras());
        boolean detailsChanged = !Objects.equals(mDetails, details);
        if (detailsChanged) {
            mDetails = details;
        }

        boolean cannedTextResponsesChanged = false;
        if (mCannedTextResponses == null && parcelableCall.getCannedSmsResponses() != null
                && !parcelableCall.getCannedSmsResponses().isEmpty()) {
            mCannedTextResponses =
                    Collections.unmodifiableList(parcelableCall.getCannedSmsResponses());
        }

        boolean videoCallChanged = parcelableCall.isVideoCallProviderChanged() &&
                !Objects.equals(mVideoCall, parcelableCall.getVideoCall(this));
        if (videoCallChanged) {
            mVideoCall = parcelableCall.getVideoCall(this);
        }

        int state = parcelableCall.getState();
        boolean stateChanged = mState != state;
        if (stateChanged) {
            mState = state;
        }

        String parentId = parcelableCall.getParentCallId();
        boolean parentChanged = !Objects.equals(mParentId, parentId);
        if (parentChanged) {
            mParentId = parentId;
        }

        List<String> childCallIds = parcelableCall.getChildCallIds();
        boolean childrenChanged = !Objects.equals(childCallIds, mChildrenIds);
        if (childrenChanged) {
            mChildrenIds.clear();
            mChildrenIds.addAll(parcelableCall.getChildCallIds());
            mChildrenCached = false;
        }

        List<String> conferenceableCallIds = parcelableCall.getConferenceableCallIds();
        List<Call> conferenceableCalls = new ArrayList<Call>(conferenceableCallIds.size());
        for (String otherId : conferenceableCallIds) {
            if (callIdMap.containsKey(otherId)) {
                conferenceableCalls.add(callIdMap.get(otherId));
            }
        }

        if (!Objects.equals(mConferenceableCalls, conferenceableCalls)) {
            mConferenceableCalls.clear();
            mConferenceableCalls.addAll(conferenceableCalls);
            fireConferenceableCallsChanged();
        }

        // Now we fire updates, ensuring that any client who listens to any of these notifications
        // gets the most up-to-date state.

        if (stateChanged) {
            fireStateChanged(mState);
        }
        if (detailsChanged) {
            fireDetailsChanged(mDetails);
        }
        if (cannedTextResponsesChanged) {
            fireCannedTextResponsesLoaded(mCannedTextResponses);
        }
        if (videoCallChanged) {
            fireVideoCallChanged(mVideoCall);
        }
        if (parentChanged) {
            fireParentChanged(getParent());
        }
        if (childrenChanged) {
            fireChildrenChanged(getChildren());
        }

        // If we have transitioned to DISCONNECTED, that means we need to notify clients and
        // remove ourselves from the Phone. Note that we do this after completing all state updates
        // so a client can cleanly transition all their UI to the state appropriate for a
        // DISCONNECTED Call while still relying on the existence of that Call in the Phone's list.
        if (mState == STATE_DISCONNECTED) {
            fireCallDestroyed();
            mPhone.internalRemoveCall(this);
        }
    }

    /** {@hide} */
    final void internalSetPostDialWait(String remaining) {
        mRemainingPostDialSequence = remaining;
        firePostDialWait(mRemainingPostDialSequence);
    }

    /** {@hide} */
    final void internalSetDisconnected() {
        if (mState != Call.STATE_DISCONNECTED) {
            mState = Call.STATE_DISCONNECTED;
            fireStateChanged(mState);
            fireCallDestroyed();
            mPhone.internalRemoveCall(this);
        }
    }

    private void fireStateChanged(final int newState) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onStateChanged(call, newState);
                }
            });
        }
    }

    private void fireParentChanged(final Call newParent) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onParentChanged(call, newParent);
                }
            });
        }
    }

    private void fireChildrenChanged(final List<Call> children) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onChildrenChanged(call, children);
                }
            });
        }
    }

    private void fireDetailsChanged(final Details details) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onDetailsChanged(call, details);
                }
            });
        }
    }

    private void fireCannedTextResponsesLoaded(final List<String> cannedTextResponses) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onCannedTextResponsesLoaded(call, cannedTextResponses);
                }
            });
        }
    }

    private void fireVideoCallChanged(final InCallService.VideoCall videoCall) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onVideoCallChanged(call, videoCall);
                }
            });
        }
    }

    private void firePostDialWait(final String remainingPostDialSequence) {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onPostDialWait(call, remainingPostDialSequence);
                }
            });
        }
    }

    private void fireCallDestroyed() {
        for (CallbackRecord<Callback> record: mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onCallDestroyed(call);
                }
            });
        }
    }

    private void fireConferenceableCallsChanged() {
        for (CallbackRecord<Callback> record : mCallbackRecords) {
            final Call call = this;
            final Callback callback = record.getCallback();
            record.getHandler().post(new Runnable() {
                @Override
                public void run() {
                    callback.onConferenceableCallsChanged(call, mUnmodifiableConferenceableCalls);
                }
            });
        }
    }
}