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      1 /*
      2  * Copyright (C) 2015 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 package com.android.contacts.common.compat.telecom;
     17 
     18 import android.support.annotation.Nullable;
     19 import android.telecom.PhoneAccountHandle;
     20 import android.telecom.TelecomManager;
     21 import java.lang.reflect.Field;
     22 
     23 /** Compatibility class for {@link android.telecom.TelecomManager}. */
     24 public class TelecomManagerCompat {
     25 
     26   // TODO: remove once this is available in android.telecom.Call
     27   // b/33779976
     28   public static final String EXTRA_LAST_EMERGENCY_CALLBACK_TIME_MILLIS =
     29       "android.telecom.extra.LAST_EMERGENCY_CALLBACK_TIME_MILLIS";
     30 
     31   // Constants from http://cs/android/frameworks/base/telecomm/java/android/telecom/Call.java.
     32   public static final String EVENT_REQUEST_HANDOVER = "android.telecom.event.REQUEST_HANDOVER";
     33   public static final String EXTRA_HANDOVER_PHONE_ACCOUNT_HANDLE =
     34       "android.telecom.extra.HANDOVER_PHONE_ACCOUNT_HANDLE";
     35   public static final String EXTRA_HANDOVER_VIDEO_STATE =
     36       "android.telecom.extra.HANDOVER_VIDEO_STATE";
     37 
     38   // This is a hidden constant in android.telecom.DisconnectCause. Telecom sets this as a disconnect
     39   // reason if it wants us to prompt the user that the video call is not available.
     40   // TODO: Reference it to constant in android.telecom.DisconnectCause.
     41   public static final String REASON_IMS_ACCESS_BLOCKED = "REASON_IMS_ACCESS_BLOCKED";
     42 
     43   /**
     44    * Returns the current SIM call manager. Apps must be prepared for this method to return null,
     45    * indicating that there currently exists no registered SIM call manager.
     46    *
     47    * @param telecomManager the {@link TelecomManager} to use to fetch the SIM call manager.
     48    * @return The phone account handle of the current sim call manager.
     49    */
     50   @Nullable
     51   public static PhoneAccountHandle getSimCallManager(TelecomManager telecomManager) {
     52     if (telecomManager != null) {
     53       return telecomManager.getSimCallManager();
     54     }
     55     return null;
     56   }
     57 
     58   /**
     59    * Handovers are supported from Android O-DR onward. Since there is no API bump from O to O-DR, we
     60    * need to use reflection to check the existence of TelecomManager.EXTRA_IS_HANDOVER in
     61    * http://cs/android/frameworks/base/telecomm/java/android/telecom/TelecomManager.java.
     62    */
     63   public static boolean supportsHandover() {
     64     //
     65     try {
     66       Field field = TelecomManager.class.getDeclaredField("EXTRA_IS_HANDOVER");
     67       return "android.telecom.extra.IS_HANDOVER".equals(field.get(null /* obj (static field) */));
     68     } catch (Exception e) {
     69       // Do nothing
     70     }
     71     return false;
     72   }
     73 }
     74