我今年早上在Spring编写了下面的方法来获取Google Places Photo。这种方法仍然是错误的 - 对于可以修复代码的人来说只有10分 - 但它显示了我想要做的事情的要点:
@RequestMapping(method=RequestMethod.GET, value="/placedetails")
public BufferedImage PlaceDetails(@PathVariable String placeid) {
ArrayList<String> placePhotos = new ArrayList<>();
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("https://maps.googleapis.com/maps/api/place/details/json?placeid="+placeid+"&key="+serverKey)
.build();
try {
//calling the GoogleAPI to get the PlaceDetails so that I can extract the photo_reference
Response response = client.newCall(request).execute();
//parsing the response with Jackson so that I can get the photo_reference
ObjectMapper m = new ObjectMapper();
JsonNode rootNode = m.readTree(response.body().string());
JsonNode resultNode = rootNode.get("result");
final JsonNode photoArrayNode = resultNode.get("photos");
if (photoArrayNode.isArray()) {
for (JsonNode photo: photoArrayNode) {
placePhotos.add(photo.get("photo_reference").textValue());
}
}
//calling the GoogleAPI again so that I can get the photoUrl
String photoUrl = String.format("https://maps.googleapis.com/maps/api/place/photo?maxwidth=%s&photoreference=%s&key=%s",
400,
placePhotos.get(0),
serverKey);
System.out.println(photoUrl);
//getting the actual photo
Request photoRequest = new Request.Builder().url(photoUrl).build();
Response photoResponse = client.newCall(photoRequest).execute();
if (!photoResponse.isSuccessful()) throw new IOException("Unexpected code " + response);
//returning the photo
return ImageIO.read(photoResponse.body().byteStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
我认为要让Android应用显示Google商家信息图片,必须执行以下操作:
首先在Android中获取PlaceID。在我的情况下,我通过我的Android应用程序上的AutoCompleteTextView获取了我的PlaceID:(https://developers.google.com/places/android/autocomplete)(调用1)
然后我打电话给我的方法。我调用Google Places API获取地方详细信息(第2部分),然后在详细信息返回后,我使用杰克逊解析照片参考并再次调用Google Places API以将照片作为位图等返回(致电3)
我正在拨打3个Google地方的电话来退回照片。与每天1000个电话的配额相比,这是获得1张照片的相当大的要求。
在没有拨打这么多电话的情况下,没有其他方法可以获得照片吗?
我看了这个帖子:How to get a picture of a place from google maps or places API
该人建议使用panaramio而不是一开始似乎是一个非常好的选择,但是当我通过在我的浏览器中输入示例来测试它时:http://www.panoramio.com/map/get_panoramas.php?set=public&from=0&to=20&minx=-33.868&miny=151.193&maxx=-33.864&maxy=151.197&size=medium&mapfilter=true,没有返回照片。 php文件。
我不确定panaramio API是否仍有效?
答案 0 :(得分:1)
嗨,你的问题在这里
if (photoArrayNode.isArray()) {
for (JsonNode photo: photoArrayNode) {
placePhotos.add(photo.get("photo_reference").textValue());
}
哪个应该是
if (photoArrayNode.isArray()) {
for (JsonNode photo: photoArrayNode) {
placePhotos.add(photo.get("photo_reference").getString());
}
photo_reference
是photo
数组元素
此外,以下是不必要的工作:
//calling the GoogleAPI again so that I can get the photoUrl
String photoUrl = String.format("https://maps.googleapis.com/maps/api/place/photo?maxwidth=%s&photoreference=%s&key=%s",
无需格式化url字符串。下面的代码段是我在下面推荐的示例的一部分,它专门回答了您的问题。
package in.wptrafficanalyzer.locationnearbyplacesphotos;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class PlaceJSONParser {
/** Receives a JSONObject and returns a list */
public Place[] parse(JSONObject jObject){
JSONArray jPlaces = null;
try {
/** Retrieves all the elements in the 'places' array */
jPlaces = jObject.getJSONArray("results");
} catch (JSONException e) {
e.printStackTrace();
}
/** Invoking getPlaces with the array of json object
* where each json object represent a place
*/
return getPlaces(jPlaces);
}
private Place[] getPlaces(JSONArray jPlaces){
int placesCount = jPlaces.length();
Place[] places = new Place[placesCount];
/** Taking each place, parses and adds to list object */
for(int i=0; i<placesCount;i++){
try {
/** Call getPlace with place JSON object to parse the place */
places[i] = getPlace((JSONObject)jPlaces.get(i));
} catch (JSONException e) {
e.printStackTrace();
}
}
return places;
}
/** Parsing the Place JSON object */
private Place getPlace(JSONObject jPlace){
Place place = new Place();
try {
// Extracting Place name, if available
if(!jPlace.isNull("name")){
place.mPlaceName = jPlace.getString("name");
}
// Extracting Place Vicinity, if available
if(!jPlace.isNull("vicinity")){
place.mVicinity = jPlace.getString("vicinity");
}
if(!jPlace.isNull("photos")){
JSONArray photos = jPlace.getJSONArray("photos");
place.mPhotos = new Photo[photos.length()];
for(int i=0;i<photos.length();i++){
place.mPhotos[i] = new Photo();
place.mPhotos[i].mWidth = ((JSONObject)photos.get(i)).getInt("width");
place.mPhotos[i].mHeight = ((JSONObject)photos.get(i)).getInt("height");
place.mPhotos[i].mPhotoReference = ((JSONObject)photos.get(i)).getString("photo_reference");
JSONArray attributions = ((JSONObject)photos.get(i)).getJSONArray("html_attributions");
place.mPhotos[i].mAttributions = new Attribution[attributions.length()];
for(int j=0;j<attributions.length();j++){
place.mPhotos[i].mAttributions[j] = new Attribution();
place.mPhotos[i].mAttributions[j].mHtmlAttribution = attributions.getString(j);
}
}
}
place.mLat = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lat");
place.mLng = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lng");
} catch (JSONException e) {
e.printStackTrace();
Log.d("EXCEPTION", e.toString());
}
return place;
}
}
有关完整示例,请参阅:源代码可供下载。