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 import android.telephony.SubscriptionManager; 26 import android.telephony.TelephonyManager; 27 28 import com.android.internal.annotations.VisibleForTesting; 29 30 import java.util.Collections; 31 import java.util.Comparator; 32 import java.util.List; 33 34 /** 35 * Utilities to deal with the system telephony services. The system telephony services are treated 36 * differently from 3rd party services in some situations (emergency calls, audio focus, etc...). 37 */ 38 public final class TelephonyUtil { 39 private static final String TELEPHONY_PACKAGE_NAME = "com.android.phone"; 40 41 private static final String PSTN_CALL_SERVICE_CLASS_NAME = 42 "com.android.services.telephony.TelephonyConnectionService"; 43 44 private static final PhoneAccountHandle DEFAULT_EMERGENCY_PHONE_ACCOUNT_HANDLE = 45 new PhoneAccountHandle( 46 new ComponentName(TELEPHONY_PACKAGE_NAME, PSTN_CALL_SERVICE_CLASS_NAME), "E"); 47 TelephonyUtil()48 private TelephonyUtil() {} 49 50 /** 51 * @return fallback {@link PhoneAccount} to be used by Telecom for emergency calls in the 52 * rare case that Telephony has not registered any phone accounts yet. Details about this 53 * account are not expected to be displayed in the UI, so the description, etc are not 54 * populated. 55 */ 56 @VisibleForTesting getDefaultEmergencyPhoneAccount()57 public static PhoneAccount getDefaultEmergencyPhoneAccount() { 58 return PhoneAccount.builder(DEFAULT_EMERGENCY_PHONE_ACCOUNT_HANDLE, "E") 59 .setCapabilities(PhoneAccount.CAPABILITY_SIM_SUBSCRIPTION | 60 PhoneAccount.CAPABILITY_CALL_PROVIDER | 61 PhoneAccount.CAPABILITY_PLACE_EMERGENCY_CALLS) 62 .setIsEnabled(true) 63 .build(); 64 } 65 isPstnComponentName(ComponentName componentName)66 static boolean isPstnComponentName(ComponentName componentName) { 67 final ComponentName pstnComponentName = new ComponentName( 68 TELEPHONY_PACKAGE_NAME, PSTN_CALL_SERVICE_CLASS_NAME); 69 return pstnComponentName.equals(componentName); 70 } 71 shouldProcessAsEmergency(Context context, Uri handle)72 public static boolean shouldProcessAsEmergency(Context context, Uri handle) { 73 try { 74 TelephonyManager tm = (TelephonyManager) context.getSystemService( 75 Context.TELEPHONY_SERVICE); 76 return handle != null && tm.isEmergencyNumber(handle.getSchemeSpecificPart()); 77 } catch (IllegalStateException ise) { 78 return false; 79 } 80 } 81 } 82