This is a part of an online Codename One course published around 2017 see it all for free at https://debugagent.com/series/cn1

1. Creating an Uber Clone - Part XVII

2. WebServices from the Device?
✦I took a shortcut and chose to invoke the Google
webservices from the device
✦The reason I did this is that I want to teach mobile
programming not server programming
✦Google API keys would be more secure in the server
✦We can cache common queries in the server and
reduce API costs
✦We can monitor the calls sent out and identify trends
✦We can instantly switch providers without shipping a
new version of the app
© Codename One 2017 all rights reserved

3. Googles GIS Services
✦Geocoding
✦Reverse Geocoding
✦Directions
✦Places Autocomplete
© Codename One 2017 all rights reserved

4. public static final String GOOGLE_DIRECTIONS_KEY = "----";
public static final String GOOGLE_GEOCODING_KEY = "----";
public static final String GOOGLE_PLACES_KEY = "----";
New Fields in Globals

5. https://maps.googleapis.com/maps/api/geocode/json?
latlng=40.714224,-73.961452&key=YOUR_API_KEY
Reverse Geocoding

6. {
"results" : [
{
"address_components" : [
{
"long_name" : "277",
"short_name" : "277",
"types" : [ "street_number" ]
},
{
"long_name" : "Bedford Avenue",
"short_name" : "Bedford Ave",
"types" : [ "route" ]
},
... trimmed ...
],
"formatted_address" : "277 Bedford Avenue, Brooklyn, NY 11211, USA",
"geometry" : {
"location" : {
"lat" : 40.714232,
"lng" : -73.9612889
Reverse Geocoding - Result

7. {
"results" : [
{
"address_components" : [
{
"long_name" : "277",
"short_name" : "277",
"types" : [ "street_number" ]
},
{
"long_name" : "Bedford Avenue",
"short_name" : "Bedford Ave",
"types" : [ "route" ]
},
... trimmed ...
],
"formatted_address" : "277 Bedford Avenue, Brooklyn, NY 11211, USA",
"geometry" : {
"location" : {
"lat" : 40.714232,
"lng" : -73.9612889
Reverse Geocoding - Result

8. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

9. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

10. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

11. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

12. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

13. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

14. public class SearchService {
private static ConnectionRequest lastLocationRequest;
public static void nameMyCurrentLocation(Location l, SuccessCallback<String> name) {
if(l == null) {
return;
}
if(lastLocationRequest != null) {
lastLocationRequest.kill();
}
lastLocationRequest = Rest.get("https://maps.googleapis.com/maps/api/geocode/json").
queryParam("latlng", l.getLatitude() + "," + l.getLongitude()).
queryParam("key", GOOGLE_GEOCODING_KEY).
queryParam("language", "en").
queryParam("result_type", "street_address|point_of_interest").
getAsJsonMap(callbackMap -> {
Map data = callbackMap.getResponseData();
if(data != null) {
List results = (List)data.get("results");
if(results != null && results.size() > 0) {
Map firstResult = (Map)results.get(0);
name.onSucess((String)firstResult.get("formatted_address"));
}
}
});
}
SearchService

15. https://maps.googleapis.com/maps/api/place/autocomplete/json?
input=lev&location=32.072449,34.778613&radius=50000&key=API_KEY
Places Autocomplete

16. {
"predictions" : [
{
"description" : "Levinsky, Tel Aviv-Yafo, Israel",
"id" : "13fd8422602e10c4a7be775c88280b383a15f368",
"matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"structured_formatting" : {
"main_text" : "Levinsky",
"main_text_matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"secondary_text" : "Tel Aviv-Yafo, Israel"
},
"place_id" : "Eh9MZXZpbnNreSwgVGVsIEF2aXYtWWFmbywgSXNyYWVs",
"reference" : "-pQdrYHivUaFGV9GwZkfwp4xkjUL2Z2mpGNXJBv",
Places Autocomplete - Result

17. {
"predictions" : [
{
"description" : "Levinsky, Tel Aviv-Yafo, Israel",
"id" : "13fd8422602e10c4a7be775c88280b383a15f368",
"matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"structured_formatting" : {
"main_text" : "Levinsky",
"main_text_matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"secondary_text" : "Tel Aviv-Yafo, Israel"
},
"place_id" : "Eh9MZXZpbnNreSwgVGVsIEF2aXYtWWFmbywgSXNyYWVs",
"reference" : "-pQdrYHivUaFGV9GwZkfwp4xkjUL2Z2mpGNXJBv",
Places Autocomplete - Result

18. {
"predictions" : [
{
"description" : "Levinsky, Tel Aviv-Yafo, Israel",
"id" : "13fd8422602e10c4a7be775c88280b383a15f368",
"matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"structured_formatting" : {
"main_text" : "Levinsky",
"main_text_matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"secondary_text" : "Tel Aviv-Yafo, Israel"
},
"place_id" : "Eh9MZXZpbnNreSwgVGVsIEF2aXYtWWFmbywgSXNyYWVs",
"reference" : "-pQdrYHivUaFGV9GwZkfwp4xkjUL2Z2mpGNXJBv",
Places Autocomplete - Result

19. {
"predictions" : [
{
"description" : "Levinsky, Tel Aviv-Yafo, Israel",
"id" : "13fd8422602e10c4a7be775c88280b383a15f368",
"matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"structured_formatting" : {
"main_text" : "Levinsky",
"main_text_matched_substrings" : [
{
"length" : 3,
"offset" : 0
}
],
"secondary_text" : "Tel Aviv-Yafo, Israel"
},
"place_id" : "Eh9MZXZpbnNreSwgVGVsIEF2aXYtWWFmbywgSXNyYWVs",
"reference" : "-pQdrYHivUaFGV9GwZkfwp4xkjUL2Z2mpGNXJBv",
Places Autocomplete - Result

20. public static class SuggestionResult {
private final String mainText;
private final String secondaryText;
private final String fullText;
private final String placeId;
public SuggestionResult(String mainText, String secondaryText,
String fullText, String placeId) {
this.mainText = mainText;
this.secondaryText = secondaryText;
this.fullText = fullText;
this.placeId = placeId;
}
public String getPlaceId() {
return placeId;
}
public String getMainText() {
return mainText;
}
public String getSecondaryText() {
return secondaryText;
}
public String getFullText() {
return fullText;
}
SuggestionResult

21. public String getMainText() {
return mainText;
}
public String getSecondaryText() {
return secondaryText;
}
public String getFullText() {
return fullText;
}
public void getLocation(SuccessCallback<Location> result) {
Rest.get("https://maps.googleapis.com/maps/api/place/details/json").
queryParam("placeid", placeId).
queryParam("key", GOOGLE_PLACES_KEY).
getAsJsonMap(callbackMap -> {
Map r = (Map)callbackMap.getResponseData().get("result");
Map geomMap = (Map)r.get("geometry");
Map locationMap = (Map)geomMap.get("location");
double lat = Util.toDoubleValue(locationMap.get("lat"));
double lon = Util.toDoubleValue(locationMap.get("lng"));
result.onSucess(new Location(lat, lon));
});
}
}
SuggestionResult

22. private static ConnectionRequest lastSuggestionRequest;
private static String lastSuggestionValue;
private static final Map<String, List<SuggestionResult>>
locationCache = new HashMap<>();
SearchService