Java tutorial
/* The MIT License (MIT) Copyright (c) 2015-2017 HyperTrack (http://hypertrack.com) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package io.hypertrack.sendeta.model; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.Resources; import android.util.Log; import android.widget.Spinner; import com.google.i18n.phonenumbers.NumberParseException; import com.google.i18n.phonenumbers.PhoneNumberUtil; import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.io.StringWriter; import java.io.UnsupportedEncodingException; import java.io.Writer; import java.util.ArrayList; import java.util.Locale; import io.hypertrack.sendeta.R; /** * Created by suhas on 19/01/16. */ public class CountryMaster { public static final String TAG = "CountryMaster"; private static CountryMaster sInstance = null; private Context mContext = null; private String[] mCountryList; private ArrayList<Country> mCountries = new ArrayList<Country>(); private CountryMaster(Context context) { mContext = context; Resources res = mContext.getResources(); // builds country data from json InputStream is = res.openRawResource(R.raw.countries); Writer writer = new StringWriter(); char[] buffer = new char[1024]; try { Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8")); int n; while ((n = reader.read(buffer)) != -1) { writer.write(buffer, 0, n); } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } String jsonString = writer.toString(); JSONArray json = new JSONArray(); try { json = new JSONArray(jsonString); } catch (JSONException e) { e.printStackTrace(); } mCountryList = new String[json.length()]; for (int i = 0; i < json.length(); i++) { JSONObject node = json.optJSONObject(i); if (node != null) { Country country = new Country(); country.mCountryIso = node.optString("iso"); country.mDialPrefix = node.optString("tel"); country.mCountryName = getCountryName(node.optString("iso")); country.mImageId = getCountryFlagImageResource(node.optString("iso")); mCountries.add(country); mCountryList[i] = country.mCountryIso; } } } public static CountryMaster getInstance(Context context) { if (sInstance == null) { sInstance = new CountryMaster(context); } return sInstance; } /** * Returns all {@link Country} objects as an ArrayList<Country> * * @return mCountries {@link CountryMaster#mCountries} */ public ArrayList<Country> getCountries() { return mCountries; } /** * <b>If you are using a SpinnerAdapter!<b> You can feed this payload into {@link SpinnerAdapter} constructor. * * @return mCountryList {@link CountryMaster#mCountryList} */ public String[] getCountriesAsArray() { return mCountryList; } /** * Again, helpful if you are using {@link Spinner#setSelection(int)}, to set the default country. * * @param position Integer * @return country {@link Country} */ public Country getCountryByPosition(int position) { Country country = mCountries.get(position); //Log.d(TAG, country.mCountryIso); return country; } /** * Again, helper if you need to {@link Spinner#setSelection(int)} * * @param isoCode String * @return i Integer */ public int getCountryPositionByIso(String isoCode) { Country country = null; int i = 0; int n = mCountries.size(); while (i < n) { country = mCountries.get(i); if (country.mCountryIso.equals(isoCode)) { break; } i++; } return i; } /** * Returns a {@link Country} holder object by ISO code 2-char * * @param isoCode String * @return country {@link Country} */ public Country getCountryByIso(String isoCode) { Country country = null; int i = 0; int n = mCountries.size(); while (i < n) { country = mCountries.get(i++); if (country.mCountryIso.equals(isoCode)) { break; } } return country; } /** * Returns a {@link Country} holder object by country telephone prefix, * please do not pass input with a (+) preceding prefix! * * @param telPrefix String * @return country {@link Country} */ public Country getCountryByPrefix(String telPrefix) { Country country = null; int i = 0; int n = mCountries.size(); while (i < n) { country = mCountries.get(i++); if (country.mDialPrefix.equals(telPrefix)) { break; } } return country; } /** * Fetches the image resource id from drawables * * @param isoCode String * @return imageResId Integer */ @SuppressLint("DefaultLocale") public int getCountryFlagImageResource(String isoCode) { String imageName = isoCode.trim().toLowerCase(); int imageResId = mContext.getResources().getIdentifier("drawable/" + imageName, null, mContext.getPackageName()); return imageResId; } /** * Returns the device's locale iso code * * @return String */ public String getDefaultCountryIso() { Locale locale = Locale.getDefault(); return locale.getCountry(); } /** * Returns the full name of the country * * @param isoCode String * @return String */ private String getCountryName(String isoCode) { Locale locale = new Locale(Locale.getDefault().getDisplayLanguage(), isoCode); return locale.getDisplayCountry().trim(); } /** * Uses libphonenumber library to fetch a {@link PhoneNumber} object, from * a full phone number inclusive of country telephone prefix. Works best * by supplying a string without plus and hyphen characters in my experience. * * @param phoneNumber String * @return number {@link PhoneNumber} * * @see <a href="https://github.com/googlei18n/libphonenumber">https://github.com/googlei18n/libphonenumber</a> */ public PhoneNumber getPhoneNumber(String phoneNumber) { PhoneNumberUtil util = PhoneNumberUtil.getInstance(); PhoneNumber number = null; try { number = util.parse(phoneNumber, getDefaultCountryIso()); } catch (NumberParseException e) { e.printStackTrace(); } return number; } public void debug() { int i = 0; for (Country country : mCountries) { String out = String.format(Locale.getDefault(), "[%d] [%s] prefix: %s, name: %s, resId: %d", i++, country.mCountryIso, country.mDialPrefix, country.mCountryName, getCountryFlagImageResource(country.mCountryIso)); Log.d(TAG, out); } } }