Android Country, State/Region, City picker
This is Android library for making Country, State/Region and City picker. When user select wished Country, State picker will automatically load States of picked Country, After that, when user pick State, City picker will automatically load Cities of selected State or Region.
In your applicatuin build gradle
implementation 'com.vikktorn.picker:picker:1.0.0'
Implement this listeners to your application activity implements OnStatePickerListener, OnCountryPickerListener, OnCityPickerListener
Make methode to get States and Cities from JSON from library
public void getStateJson() throws JSONException {
String json = null;
try {
InputStream inputStream = getAssets().open("states.json");
int size = inputStream.available();
byte[] buffer = new byte[size];
inputStream.read(buffer);
inputStream.close();
json = new String(buffer, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
JSONObject jsonObject = new JSONObject(json);
JSONArray events = jsonObject.getJSONArray("states");
for (int j = 0; j < events.length(); j++) {
JSONObject cit = events.getJSONObject(j);
State stateData = new State();
stateData.setStateId(Integer.parseInt(cit.getString("id")));
stateData.setStateName(cit.getString("name"));
stateData.setCountryId(Integer.parseInt(cit.getString("country_id")));
stateObject.add(stateData);
}
} // GET CITY FROM ASSETS JSON public void getCityJson() throws JSONException { String json = null; try { InputStream inputStream = getAssets().open("cities.json"); int size = inputStream.available(); byte[] buffer = new byte[size]; inputStream.read(buffer); inputStream.close(); json = new String(buffer, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
JSONObject jsonObject = new JSONObject(json);
JSONArray events = jsonObject.getJSONArray("cities");
for (int j = 0; j < events.length(); j++) {
JSONObject cit = events.getJSONObject(j);
City cityData = new City();
cityData.setCityId(Integer.parseInt(cit.getString("id")));
cityData.setCityName(cit.getString("name"));
cityData.setStateId(Integer.parseInt(cit.getString("state_id")));
cityObject.add(cityData);
}
} Create pickers
private CountryPicker countryPicker; private StatePicker statePicker; private CityPicker cityPicker; Than set listeners on pickers
private void setListener() { pickStateButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { statePicker.showDialog(getSupportFragmentManager()); } }); } //SET COUNTRY LISTENER private void setCountryListener() { pickCountry.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { countryPicker.showDialog(getSupportFragmentManager()); } }); } //SET CITY LISTENER private void setCityListener() { pickCity.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { cityPicker.showDialog(getSupportFragmentManager()); } }); } And finale call methode onSelected from library
@Override public void onSelectCountry(Country country) { // get country name and country ID countryName.setText(country.getName()); countryID = country.getCountryId(); statePicker.equalStateObject.clear(); cityPicker.equalCityObject.clear();
//set state name text view and state pick button invisible
pickStateButton.setVisibility(View.VISIBLE);
stateNameTextView.setVisibility(View.VISIBLE);
stateNameTextView.setText("Region");
cityName.setText("City");
// set text on main view
countryCode.setText("Country code: " + country.getCode());
countryPhoneCode.setText("Country dial code: " + country.getDialCode());
countryCurrency.setText("Country currency: " + country.getCurrency());
flagImage.setBackgroundResource(country.getFlag());
// GET STATES OF SELECTED COUNTRY
for(int i = 0; i < stateObject.size(); i++) {
// init state picker
statePicker = new StatePicker.Builder().with(this).listener(this).build();
State stateData = new State();
if (stateObject.get(i).getCountryId() == countryID) {
stateData.setStateId(stateObject.get(i).getStateId());
stateData.setStateName(stateObject.get(i).getStateName());
stateData.setCountryId(stateObject.get(i).getCountryId());
stateData.setFlag(country.getFlag());
statePicker.equalStateObject.add(stateData);
}
}
} // ON SELECTED STATE ADD CITY TO PICKER @Override public void onSelectState(State state) { pickCity.setVisibility(View.VISIBLE); cityName.setVisibility(View.VISIBLE); cityName.setText("City"); cityPicker.equalCityObject.clear();
stateNameTextView.setText(state.getStateName());
stateID = state.getStateId();
for(int i = 0; i < cityObject.size(); i++) {
cityPicker = new CityPicker.Builder().with(this).listener(this).build();
City cityData = new City();
if (cityObject.get(i).getStateId() == stateID) {
cityData.setCityId(cityObject.get(i).getCityId());
cityData.setCityName(cityObject.get(i).getCityName());
cityData.setStateId(cityObject.get(i).getStateId());
cityPicker.equalCityObject.add(cityData);
}
}
} // ON SELECTED CITY @Override public void onSelectCity(City city) { cityName.setText(city.getCityName()); } @Override public void onPointerCaptureChanged(boolean hasCapture) {
} Finally this is completly Java activity
public class MainActivity extends AppCompatActivity implements OnStatePickerListener, OnCountryPickerListener, OnCityPickerListener {
public static int countryID, stateID; private Button pickStateButton, pickCountry, pickCity; private TextView stateNameTextView, countryName,countryCode, countryPhoneCode, countryCurrency, cityName; private ImageView flagImage; // Pickers private CountryPicker countryPicker; private StatePicker statePicker; private CityPicker cityPicker; // arrays of state object public static List stateObject; // arrays of city object public static List cityObject;
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // initialize view initView(); // get state from assets JSON try { getStateJson(); } catch (JSONException e) { e.printStackTrace(); } // get City from assets JSON try { getCityJson(); } catch (JSONException e) { e.printStackTrace(); }
// initialize country picker
countryPicker = new CountryPicker.Builder().with(this).listener(this).build();
// initialize listeners
setListener();
setCountryListener();
setCityListener();
}
public void initView(){ //Buttons pickStateButton = (Button) findViewById(R.id.pickState); //set state picker invisible pickStateButton.setVisibility(View.INVISIBLE); pickCountry = (Button) findViewById(R.id.pickCountry); pickCity = (Button) findViewById(R.id.pick_city); // set city picker invisible pickCity.setVisibility(View.INVISIBLE); // Text Views countryName = (TextView) findViewById(R.id.countryNameTextView); countryCode = (TextView) findViewById(R.id.countryCodeTextView); countryPhoneCode = (TextView) findViewById(R.id.countryDialCodeTextView); countryCurrency = (TextView) findViewById(R.id.countryCurrencyTextView); stateNameTextView = (TextView) findViewById(R.id.state_name); //set state name text view invisible stateNameTextView.setVisibility(View.INVISIBLE); cityName = (TextView) findViewById(R.id.city_name); //set state name text view invisible cityName.setVisibility(View.INVISIBLE);
// ImageView
flagImage = (ImageView) findViewById(R.id.flag_image);
// initiate state object, parser, and arrays
stateObject = new ArrayList<>();
cityObject = new ArrayList<>();
}
// SET STATE LISTENER private void setListener() { pickStateButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { statePicker.showDialog(getSupportFragmentManager()); } }); } //SET COUNTRY LISTENER private void setCountryListener() { pickCountry.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { countryPicker.showDialog(getSupportFragmentManager()); } }); } //SET CITY LISTENER private void setCityListener() { pickCity.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { cityPicker.showDialog(getSupportFragmentManager()); } }); } // ON SELECTED COUNTRY ADD STATES TO PICKER @Override public void onSelectCountry(Country country) { // get country name and country ID countryName.setText(country.getName()); countryID = country.getCountryId(); statePicker.equalStateObject.clear(); cityPicker.equalCityObject.clear();
//set state name text view and state pick button invisible
pickStateButton.setVisibility(View.VISIBLE);
stateNameTextView.setVisibility(View.VISIBLE);
stateNameTextView.setText("Region");
cityName.setText("City");
// set text on main view
countryCode.setText("Country code: " + country.getCode());
countryPhoneCode.setText("Country dial code: " + country.getDialCode());
countryCurrency.setText("Country currency: " + country.getCurrency());
flagImage.setBackgroundResource(country.getFlag());
// GET STATES OF SELECTED COUNTRY
for(int i = 0; i < stateObject.size(); i++) {
// init state picker
statePicker = new StatePicker.Builder().with(this).listener(this).build();
State stateData = new State();
if (stateObject.get(i).getCountryId() == countryID) {
stateData.setStateId(stateObject.get(i).getStateId());
stateData.setStateName(stateObject.get(i).getStateName());
stateData.setCountryId(stateObject.get(i).getCountryId());
stateData.setFlag(country.getFlag());
statePicker.equalStateObject.add(stateData);
}
}
} // ON SELECTED STATE ADD CITY TO PICKER @Override public void onSelectState(State state) { pickCity.setVisibility(View.VISIBLE); cityName.setVisibility(View.VISIBLE); cityName.setText("City"); cityPicker.equalCityObject.clear();
stateNameTextView.setText(state.getStateName());
stateID = state.getStateId();
for(int i = 0; i < cityObject.size(); i++) {
cityPicker = new CityPicker.Builder().with(this).listener(this).build();
City cityData = new City();
if (cityObject.get(i).getStateId() == stateID) {
cityData.setCityId(cityObject.get(i).getCityId());
cityData.setCityName(cityObject.get(i).getCityName());
cityData.setStateId(cityObject.get(i).getStateId());
cityPicker.equalCityObject.add(cityData);
}
}
} // ON SELECTED CITY @Override public void onSelectCity(City city) { cityName.setText(city.getCityName()); } @Override public void onPointerCaptureChanged(boolean hasCapture) {
} // GET STATE FROM ASSETS JSON public void getStateJson() throws JSONException { String json = null; try { InputStream inputStream = getAssets().open("states.json"); int size = inputStream.available(); byte[] buffer = new byte[size]; inputStream.read(buffer); inputStream.close(); json = new String(buffer, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
JSONObject jsonObject = new JSONObject(json);
JSONArray events = jsonObject.getJSONArray("states");
for (int j = 0; j < events.length(); j++) {
JSONObject cit = events.getJSONObject(j);
State stateData = new State();
stateData.setStateId(Integer.parseInt(cit.getString("id")));
stateData.setStateName(cit.getString("name"));
stateData.setCountryId(Integer.parseInt(cit.getString("country_id")));
stateObject.add(stateData);
}
} // GET CITY FROM ASSETS JSON public void getCityJson() throws JSONException { String json = null; try { InputStream inputStream = getAssets().open("cities.json"); int size = inputStream.available(); byte[] buffer = new byte[size]; inputStream.read(buffer); inputStream.close(); json = new String(buffer, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
JSONObject jsonObject = new JSONObject(json);
JSONArray events = jsonObject.getJSONArray("cities");
for (int j = 0; j < events.length(); j++) {
JSONObject cit = events.getJSONObject(j);
City cityData = new City();
cityData.setCityId(Integer.parseInt(cit.getString("id")));
cityData.setCityName(cit.getString("name"));
cityData.setStateId(Integer.parseInt(cit.getString("state_id")));
cityObject.add(cityData);
}}}
Thanks to Mukesh Solanki, mukeshsolanki I get idea from his country picker from this link:https://github.com/mukeshsolanki/country-picker-android, and I use his country Object in my library . Also thanks to Rohit Kumar, hiiamrohit because I use his JSON data for States and Cities from this link: http://www.iamrohit.in/countries-states-and-cities-database-of-world-in-mysql/
Also for some Countries I don't have list of States and Cities, so when State and City list is empty application break , but this is just for 10 Countries I think and I working on that.