JSON：在android中从JSON文件获取latlng
一个完整的问题编辑，上一个问题由@santalu回答，为你的男人感到荣幸 现在的问题是，我正在尝试访问一个JSON文件，它是我从下面的函数中获得的。我正在创建一个应用程序，列出一个城市中所有的旅游景点及其位置。我能够访问json并读取旅游景点的名称，但我无法从json读取纬度和经度JSON：在android中从JSON文件获取latlng,android,json,null,okhttp,Android,Json,Null,Okhttp,一个完整的问题编辑，上一个问题由@santalu回答，为你的男人感到荣幸 现在的问题是，我正在尝试访问一个JSON文件，它是我从下面的函数中获得的。我正在创建一个应用程序，列出一个城市中所有的旅游景点及其位置。我能够访问json并读取旅游景点的名称，但我无法从json读取纬度和经度 public void get_json_tourist_places(){ Response responses; responses = null; /*urls=
public void get_json_tourist_places(){
Response responses;
responses = null;
/*urls="https://maps.googleapis.com/maps/api/place/textsearch/json?query="+place_name+"point+of+interest&language=en&type=tourist_attraction,museum,amusement_park,zoo"+"&key="+getString(R.string.api_key);
*/
urls = "https://maps.googleapis.com/maps/api/place/textsearch/json?query=new+york+city+point+of+interest&language=en&key=API_key&type=tourist_attraction,museum,amusement_park,zoo";
try {
Log.d("JSON", "about to retrieve data");
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(urls)
.build();
try {
responses = client.newCall(request).execute();
jsonData = responses.body().string();
Log.d("JSON", jsonData);
/*return response_ztring;*/
if (jsonData != null) {
Log.d("JSON", "data received");
JSONObject Jobject = null;
try {
Jobject = new JSONObject(jsonData);
Log.d("JSON", "Jobject read jsondata");
} catch (JSONException e) {
Log.d("JSON", "Jobject from jsonData error");
e.printStackTrace();
}
JSONArray Jarray = null;
try {
Jarray = Jobject.getJSONArray("results");
Log.d("JSON", "JArray read results");
} catch (JSONException e) {
Log.d("JSON", "Jobject from jsonData error");
e.printStackTrace();
}
if (Jarray != null) {
/*Jarralength = Jarray.length();*/
Jarralength = 19;
for (int i = 0; i < Jarralength; i++) {
try {
JSONObject object = Jarray.getJSONObject(i);
tourist_name = object.getString("name");
Log.d("JSON",tourist_name);
tourist_lat = object.getDouble("lat");
Log.d("JSON",Double.toString(tourist_lat));
tourist_lng = object.getDouble("lng");
tourist_latlang = new LatLng(tourist_lat,tourist_lng);
mMap.addMarker(new MarkerOptions().position(tourist_latlang).title(tourist_name));
} catch (JSONException e) {
e.printStackTrace();
}
}}
}else{
Log.d("JSON", "Null object found");
}
} catch (IOException e) {
Log.d("JSON", "inside function - error 1");
Log.d("JSON", e.toString()+"inside function");
/*return null;*/
}
}catch (Exception e){
Log.d("JSON", "inside function - error 2");
Log.d("JSON",e.toString()+"inside function");
/*return null;*/
}
}
}
{
"html_attributions" : [],
"next_page_token" : "CtQERAIAAF_ny-R_r3JBJMToZ6eVAv3cu9Ang5GnRFKNDml2JnE0OmsRxDCWeO0tslc46gW6Hl65jLD-eEpcf1Zaoyhaw5LKl3dojxMqZJx48SMazCjw0V5dkMqU1r8yMfvOITUhqJvtpJGxSKlxEMRke9tN5rxnp8oG-6FGCwR1oRrx_h-zichjyKUintGJJBiDKnTXBQVIscePKScKDSKM0xxkZnX0didAm8meOA7jR7Wte6HRNn0VEslgnlpekJuhi5dAguOE-nk4UuOG6MCuSAMQxhqCYYVDxKa8QZKBv7RoElcDuoezTTCYo3yjRliEIFTfCi0vMybBvZHGmGlY5cRQMshxMsJKnnpsFrl-5zPmsUvuhPe8cVkE-isfN1WiG7uUfiDWj_bVpUp7JOKrh81aqTnW4zIEGzT6nSoS87ltXyinqlY2heVxInLoYaKpvUNaeghkTr0cGL5sdgLu1RGUKHr6zkJrDY63I51jkAOZsYaYHEEMvnSB-JUE6VTT_04Kg7JRMLO6VbEQnP3tJsbLuzRm4K7rbo07WggKYLzpgk7cMtFQpqzcTUExTiJVhmG8aBvij58s9eLbhXROoZN9gDifhBg3d-jqNPHw0-RXgHMD6blK_DxBeUwj1Ndij7ekaRLjouhTtStOWMbWkdZmfzS1XffY6ceKrAHKmacpoTH0p8QYGTw5v5WPfi-O4DOfBqFMvw60HGJX3IEBb3yqpxGnz9K5nm2qJ1W2-LxEQ-5Nn7VjbeYLCGsw9W3nE87zuagwBjPOF3RjYnfurkkF4QASEI6zwqeQiFUDF67KOq-LT-oaFOc4TT7-o5btr0CCiNFGoU3GPYAq",
"results" : [
{
"formatted_address" : "New York, NY 10011, United States",
"geometry" : {
"location" : {
"lat" : 40.7479925,
"lng" : -74.0047649
},
"viewport" : {
"northeast" : {
"lat" : 40.75890824999998,
"lng" : -73.99853175
},
"southwest" : {
"lat" : 40.73287364999999,
"lng" : -74.01141114999999
}
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_recreational-71.png",
"id" : "72dc79d023feec77725d7336e7c46fee27805319",
"name" : "The High Line",
"opening_hours" : {
"open_now" : true
},
"photos" : [
{
"height" : 3267,
"html_attributions" : [
"\u003ca href=\"https://maps.google.com/maps/contrib/105487997458497097901\"\u003eАлександр Иванов\u003c/a\u003e"
],
"photo_reference" : "CmRaAAAAMQLLPJRDK2RUdpgd5HM7cCyLO0n4JPecWoRECfD1-0tGtjtxj3kDrv4bcGVML6Ka6h6lUBuJ1qA0lfhDe_ZnLl9krJCjEr1caXLUdNpPRxgQrgdGhHKkmK6XBWlq-Nd7EhCJMH4b-vQfZ9agTO6C73AvGhQihQAwG1zkF2nZygrixAD4NOzaZw",
"width" : 4895
}
],
"place_id" : "ChIJ5bQPhMdZwokRkTwKhVxhP1g",
"plus_code" : {
"compound_code" : "PXXW+53 New York, United States",
"global_code" : "87G7PXXW+53"
},
"rating" : 4.7,
"reference" : "ChIJ5bQPhMdZwokRkTwKhVxhP1g",
"types" : [ "park", "tourist_attraction", "point_of_interest", "establishment" ],
"user_ratings_total" : 40128
},
{
"formatted_address" : "1260 6th Ave, New York, NY 10020, United States",
"geometry" : {
"location" : {
"lat" : 40.75997599999999,
"lng" : -73.97997719999999
},
"viewport" : {
"northeast" : {
"lat" : 40.76128112989272,
"lng" : -73.97878962010728
},
"southwest" : {
"lat" : 40.75858147010728,
"lng" : -73.98148927989271
}
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png",
"id" : "89dd7f0c82efc14f18954f8abf2925515037927a",
"name" : "Radio City Music Hall",
"photos" : [
{
"height" : 2988,
"html_attributions" : [
"\u003ca href=\"https://maps.google.com/maps/contrib/116446596751419338697\"\u003eAndres Moya\u003c/a\u003e"
],
"photo_reference" : "CmRaAAAAa2L9ceDCY9787WSlvpuvWntfsA60hBed8bquDMUaXuCCjXdvjLx5neVliD1aRJlkcdTvjElMuc_jhN0z2fYFjS9mUnACdRw-HVgVGRmpsMTFmi_dB-FG1Wx3BII3ZEOYEhBJY7yVQgUzoCwy5vh61NM1GhTy52brtjjvEgMVRTzmZ7vE0LRUlQ",
"width" : 5312
}
],
"place_id" : "ChIJPS8b1vhYwokRldqq2YHmxJI",
{
...
"results" : [
{
...
"geometry" : {
"location" : {
"lat" : 40.7479925,
"lng" : -74.0047649
},
latJobject = new JSONObject(jsonData);
Jobject.getJSONArray("results");
Jobject.getJSONArray("results")
.getJSONObject("geometry")
.getJSONObject("location")
.getDouble("lat")
JSONObject object = Jarray.getJSONObject(i);
tourist_name = object.getString("name");
Log.d("JSON",tourist_name);
JSONObject location = object.getJSONObject("geometry").getJSONObject("location");
tourist_lat = location.getDouble("lat");
tourist_lng = location.getDouble("lng");
Log.d("JSON", "Lat/Lng" + tourist_lat + "/" + tourist_lng);
Jobject.getJSONArray("results")
.getJSONObject("geometry")
.getJSONObject("location")
.getDouble("lat")
JSONObject object = Jarray.getJSONObject(i);
tourist_name = object.getString("name");
Log.d("JSON",tourist_name);
JSONObject location = object.getJSONObject("geometry").getJSONObject("location");
tourist_lat = location.getDouble("lat");
tourist_lng = location.getDouble("lng");
Log.d("JSON", "Lat/Lng" + tourist_lat + "/" + tourist_lng);
有个小错误。。。只需将
if（jsonData==null）if（jsonData！=null）“几何体”“lat”/“lng”的字符串，类似地，获取“视口”的JSONObject
非常感谢，伙计！！