I need to search Goolge Places Pages by long/lat for any banks in the area of 20m.
This Google Places Doc describes how to do it with JavaScript. They are using a google.maps.LatLng Object that i don't have in Java.
Does anyone now how to call the Service?
Maybe there is also an Java API for Goolge Places?
Best Regards, Christian.
Edit 1:
I found someone constructing the url like this:
String url = baseUrl + "location=" + lat + "," + lon + "&" +
"radius=" + searchRadius + "&" + types + "&" + "sensor=true" +
"&" + "key=" + googleAPIKey;
Answer: Edit 2:
I because of the post above i found out how to do it. This is a example how to send the request:
public class GooglePlacesClient
{
private static final String GOOGLE_API_KEY = "***";
private final HttpClient client = new DefaultHttpClient();
public static void main(final String[] args) throws ParseException, IOException, URISyntaxException
{
new GooglePlacesClient().performSearch("establishment", 8.6668310, 50.1093060);
}
public void performSearch(final String types, final double lon, final double lat) throws ParseException, IOException, URISyntaxException
{
final URIBuilder builder = new URIBuilder().setScheme("https").setHost("maps.googleapis.com").setPath("/maps/api/place/search/json");
builder.addParameter("location", lat + "," + lon);
builder.addParameter("radius", "5");
builder.addParameter("types", types);
builder.addParameter("sensor", "true");
builder.addParameter("key", GooglePlacesClient.GOOGLE_API_KEY);
final HttpUriRequest request = new HttpGet(builder.build());
final HttpResponse execute = this.client.execute(request);
final String response = EntityUtils.toString(execute.getEntity());
System.out.println(response);
}
}
Here's a more complete example (includes JSON parsing and some exception handling) for Places API search, autocomplete, and details. It was written for Android, but can be easily ported for non-Android use (need to include org.json libs and use different logging). The Place class is a simple value object.
package com.example.google.places;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
/**
* @author saxman
*/
public class PlacesService {
private static final String LOG_TAG = "ExampleApp";
private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place";
private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
private static final String TYPE_DETAILS = "/details";
private static final String TYPE_SEARCH = "/search";
private static final String OUT_JSON = "/json";
// KEY!
private static final String API_KEY = "YOUR KEY";
public static ArrayList<Place> autocomplete(String input) {
ArrayList<Place> resultList = null;
HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
StringBuilder sb = new StringBuilder(PLACES_API_BASE);
sb.append(TYPE_AUTOCOMPLETE);
sb.append(OUT_JSON);
sb.append("?sensor=false");
sb.append("&key=" + API_KEY);
sb.append("&input=" + URLEncoder.encode(input, "utf8"));
URL url = new URL(sb.toString());
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
jsonResults.append(buff, 0, read);
}
} catch (MalformedURLException e) {
Log.e(LOG_TAG, "Error processing Places API URL", e);
return resultList;
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to Places API", e);
return resultList;
} finally {
if (conn != null) {
conn.disconnect();
}
}
try {
// Create a JSON object hierarchy from the results
JSONObject jsonObj = new JSONObject(jsonResults.toString());
JSONArray predsJsonArray = jsonObj.getJSONArray("predictions");
// Extract the Place descriptions from the results
resultList = new ArrayList<Place>(predsJsonArray.length());
for (int i = 0; i < predsJsonArray.length(); i++) {
Place place = new Place();
place.reference = predsJsonArray.getJSONObject(i).getString("reference");
place.name = predsJsonArray.getJSONObject(i).getString("description");
resultList.add(place);
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Error processing JSON results", e);
}
return resultList;
}
public static ArrayList<Place> search(String keyword, double lat, double lng, int radius) {
ArrayList<Place> resultList = null;
HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
StringBuilder sb = new StringBuilder(PLACES_API_BASE);
sb.append(TYPE_SEARCH);
sb.append(OUT_JSON);
sb.append("?sensor=false");
sb.append("&key=" + API_KEY);
sb.append("&keyword=" + URLEncoder.encode(keyword, "utf8"));
sb.append("&location=" + String.valueOf(lat) + "," + String.valueOf(lng));
sb.append("&radius=" + String.valueOf(radius));
URL url = new URL(sb.toString());
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
jsonResults.append(buff, 0, read);
}
} catch (MalformedURLException e) {
Log.e(LOG_TAG, "Error processing Places API URL", e);
return resultList;
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to Places API", e);
return resultList;
} finally {
if (conn != null) {
conn.disconnect();
}
}
try {
// Create a JSON object hierarchy from the results
JSONObject jsonObj = new JSONObject(jsonResults.toString());
JSONArray predsJsonArray = jsonObj.getJSONArray("results");
// Extract the Place descriptions from the results
resultList = new ArrayList<Place>(predsJsonArray.length());
for (int i = 0; i < predsJsonArray.length(); i++) {
Place place = new Place();
place.reference = predsJsonArray.getJSONObject(i).getString("reference");
place.name = predsJsonArray.getJSONObject(i).getString("name");
resultList.add(place);
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Error processing JSON results", e);
}
return resultList;
}
public static Place details(String reference) {
HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
StringBuilder sb = new StringBuilder(PLACES_API_BASE);
sb.append(TYPE_DETAILS);
sb.append(OUT_JSON);
sb.append("?sensor=false");
sb.append("&key=" + API_KEY);
sb.append("&reference=" + URLEncoder.encode(reference, "utf8"));
URL url = new URL(sb.toString());
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
// Load the results into a StringBuilder
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
jsonResults.append(buff, 0, read);
}
} catch (MalformedURLException e) {
Log.e(LOG_TAG, "Error processing Places API URL", e);
return null;
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to Places API", e);
return null;
} finally {
if (conn != null) {
conn.disconnect();
}
}
Place place = null;
try {
// Create a JSON object hierarchy from the results
JSONObject jsonObj = new JSONObject(jsonResults.toString()).getJSONObject("result");
place = new Place();
place.icon = jsonObj.getString("icon");
place.name = jsonObj.getString("name");
place.formatted_address = jsonObj.getString("formatted_address");
if (jsonObj.has("formatted_phone_number")) {
place.formatted_phone_number = jsonObj.getString("formatted_phone_number");
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Error processing JSON results", e);
}
return place;
}
}
A Java library for working with the Google Places API is available on GitHub and in Maven Central (disclosure: I'm the developer.) Getting a list of places (or details, photo, etc.) can be done in one or two lines. See the project page for examples and set up details.
There doesn't exist any official Java library available for Google Places API. However, there are several projects hosted on Github. Another one is this: Google Places API Java Library on Github
来源：https://stackoverflow.com/questions/12460471/how-to-send-a-google-places-search-request-with-java