1 /* 2 * Copyright (C) 2017 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.dialer.assisteddialing; 18 19 import android.annotation.TargetApi; 20 import android.os.Build.VERSION_CODES; 21 import android.support.annotation.NonNull; 22 import android.support.annotation.Nullable; 23 import android.telephony.TelephonyManager; 24 import android.text.TextUtils; 25 import com.android.dialer.common.LogUtil; 26 import java.util.Locale; 27 import java.util.Optional; 28 29 // TODO(erfanian): Improve definition of roaming and home country in finalized API. 30 /** 31 * LocationDetector is responsible for determining the Roaming location of the User, in addition to 32 * User's home country. 33 */ 34 final class LocationDetector { 35 36 private final TelephonyManager telephonyManager; 37 private final String userProvidedHomeCountry; 38 LocationDetector( @onNull TelephonyManager telephonyManager, @Nullable String userProvidedHomeCountry)39 public LocationDetector( 40 @NonNull TelephonyManager telephonyManager, @Nullable String userProvidedHomeCountry) { 41 if (telephonyManager == null) { 42 throw new NullPointerException("Provided TelephonyManager was null"); 43 } 44 45 this.telephonyManager = telephonyManager; 46 this.userProvidedHomeCountry = userProvidedHomeCountry; 47 } 48 49 // TODO(erfanian): confirm this is based on ISO 3166-1 alpha-2. libphonenumber expects Unicode's 50 // CLDR 51 // TODO(erfanian): confirm these are still valid in a multi-sim environment. 52 /** 53 * Returns what we believe to be the User's home country. This should resolve to 54 * PROPERTY_ICC_OPERATOR_ISO_COUNTRY 55 */ 56 @SuppressWarnings("AndroidApiChecker") // Use of optional 57 @TargetApi(VERSION_CODES.N) getUpperCaseUserHomeCountry()58 public Optional<String> getUpperCaseUserHomeCountry() { 59 60 if (!TextUtils.isEmpty(userProvidedHomeCountry)) { 61 LogUtil.i( 62 "LocationDetector.getUpperCaseUserRoamingCountry", "user provided home country code"); 63 return Optional.of(userProvidedHomeCountry.toUpperCase(Locale.US)); 64 } 65 66 String simCountryIso = telephonyManager.getSimCountryIso(); 67 if (simCountryIso != null) { 68 LogUtil.i("LocationDetector.getUpperCaseUserRoamingCountry", "using sim country iso"); 69 return Optional.of(telephonyManager.getSimCountryIso().toUpperCase(Locale.US)); 70 } 71 LogUtil.i("LocationDetector.getUpperCaseUserHomeCountry", "user home country was null"); 72 return Optional.empty(); 73 } 74 75 /** Returns what we believe to be the User's current (roaming) country */ 76 @SuppressWarnings("AndroidApiChecker") // Use of optional 77 @TargetApi(VERSION_CODES.N) getUpperCaseUserRoamingCountry()78 public Optional<String> getUpperCaseUserRoamingCountry() { 79 // TODO Increase coverage of location resolution?? 80 String networkCountryIso = telephonyManager.getNetworkCountryIso(); 81 if (networkCountryIso != null) { 82 return Optional.of(telephonyManager.getNetworkCountryIso().toUpperCase(Locale.US)); 83 } 84 LogUtil.i("LocationDetector.getUpperCaseUserRoamingCountry", "user roaming country was null"); 85 return Optional.empty(); 86 } 87 } 88