java/com/android/contacts/common/compat/telecom/TelecomManagerCompat.java


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

/*
 * Copyright (C) 2015 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.contacts.common.compat.telecom;

import android.support.annotation.Nullable;
import android.telecom.PhoneAccountHandle;
import android.telecom.TelecomManager;
import java.lang.reflect.Field;

/** Compatibility class for {@link android.telecom.TelecomManager}. */
public class TelecomManagerCompat {

  // TODO(mdooley): remove once this is available in android.telecom.Call
  // b/33779976
  public static final String EXTRA_LAST_EMERGENCY_CALLBACK_TIME_MILLIS =
      "android.telecom.extra.LAST_EMERGENCY_CALLBACK_TIME_MILLIS";

  // Constants from http://cs/android/frameworks/base/telecomm/java/android/telecom/Call.java.
  public static final String EVENT_REQUEST_HANDOVER = "android.telecom.event.REQUEST_HANDOVER";
  public static final String EXTRA_HANDOVER_PHONE_ACCOUNT_HANDLE =
      "android.telecom.extra.HANDOVER_PHONE_ACCOUNT_HANDLE";
  public static final String EXTRA_HANDOVER_VIDEO_STATE =
      "android.telecom.extra.HANDOVER_VIDEO_STATE";

  /**
   * Returns the current SIM call manager. Apps must be prepared for this method to return null,
   * indicating that there currently exists no registered SIM call manager.
   *
   * @param telecomManager the {@link TelecomManager} to use to fetch the SIM call manager.
   * @return The phone account handle of the current sim call manager.
   */
  @Nullable
  public static PhoneAccountHandle getSimCallManager(TelecomManager telecomManager) {
    if (telecomManager != null) {
      return telecomManager.getSimCallManager();
    }
    return null;
  }

  /**
   * Handovers are supported from Android O-DR onward. Since there is no API bump from O to O-DR, we
   * need to use reflection to check the existence of TelecomManager.EXTRA_IS_HANDOVER in
   * http://cs/android/frameworks/base/telecomm/java/android/telecom/TelecomManager.java.
   */
  public static boolean supportsHandover() {
    //
    try {
      Field field = TelecomManager.class.getDeclaredField("EXTRA_IS_HANDOVER");
      return "android.telecom.extra.IS_HANDOVER".equals(field.get(null /* obj (static field) */));
    } catch (Exception e) {
      // Do nothing
    }
    return false;
  }
}