Helper created for European Union regulation about cookies. It checks if android device is from one of the European Union countries to show the corresponding message.

CountryHelper.java

import android.content.Context;
import android.telephony.TelephonyManager;
import android.util.Log;

import java.util.Arrays;
import java.util.Locale;

/**
 * Created by marta on 29/7/15.
 */
public class CountryHelper {
    private static final String TAG = CountryHelper.class.getSimpleName();

    //European countries ISO 3166-1 alpha-2 country codes
    private static final String[] COUNTRIES = {"at", "be", "bg", "hr", "cy", "cz", "dk", "fr", "de", "gr", "hu", "ie", "it", "lv", "lt", "lu", "mt", "nl", "pl", "pt", "ro", "sk", "si", "es", "se", "gb"};

    /**
     * Get ISO 3166-1 alpha-2 country code for this device (or null if not available)
     * @param context Context reference to get the TelephonyManager instance from
     * @return country code or null
     */
    public static String getUserCountry(Context context) {
        try {
            final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            final String simCountry = tm.getSimCountryIso();
            if (simCountry != null && simCountry.length() == 2) { // SIM country code is available
                return simCountry.toLowerCase(Locale.US);
            } else if (tm.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) { // device is not 3G (would be unreliable)
                String networkCountry = tm.getNetworkCountryIso();
                if (networkCountry != null && networkCountry.length() == 2) { // network country code is available
                    return networkCountry.toLowerCase(Locale.US);
                }
            }
        } catch (Exception e) {
            Log.e(TAG, "Cannot get user country");
        }
        return "";
    }

    /**
     * Checks if the device country if from the European Union
     * @param context
     * @return true if the device country is from the European Union false otherwise
     */
    public static boolean isEuropeanCountry(Context context) {
        String country = CountryHelper.getUserCountry(context);
        Log.e(TAG, "country = " + country);
        return Arrays.asList(COUNTRIES).contains(country);
    }
}