1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * 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, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License
15 */
16
17package com.android.providers.contacts;
18
19import android.content.Context;
20import android.location.Country;
21import android.location.CountryDetector;
22import android.location.CountryListener;
23import android.os.Looper;
24
25/**
26 * This class monitors the change of country.
27 * <p>
28 * {@link #getCountryIso()} is used to get the ISO 3166-1 two letters country
29 * code of current country.
30 */
31public class CountryMonitor {
32    private String mCurrentCountryIso;
33    private Context mContext;
34
35    public CountryMonitor(Context context) {
36        mContext = context;
37    }
38
39    /**
40     * Get the current country code
41     *
42     * @return the ISO 3166-1 two letters country code of current country.
43     */
44    public synchronized String getCountryIso() {
45        if (mCurrentCountryIso == null) {
46            final CountryDetector countryDetector =
47                    (CountryDetector) mContext.getSystemService(Context.COUNTRY_DETECTOR);
48            mCurrentCountryIso = countryDetector.detectCountry().getCountryIso();
49            countryDetector.addCountryListener(new CountryListener() {
50                public void onCountryDetected(Country country) {
51                    mCurrentCountryIso = country.getCountryIso();
52                }
53            }, Looper.getMainLooper());
54        }
55        return mCurrentCountryIso;
56    }
57}
58