我正在解析json，这是一个json object开始。它有一个数组html_attributions[]和另一个数组results[]
现在，当我从json创建URL字符串时，我可以看到我的json字符串即将到来。但是在从json字符串创建json对象时，我有illegalArugumentException，illegal character in scheme at index 0。
我的目标是从json中找到位置并在我的google mapview中标记。
这是我的asynctask类..
class LocationJSON extends AsyncTask<String, Integer, Long> {
@Override
protected Long doInBackground(String... arg0) {
// TODO Auto-generated method stub
JSONParser jParser = new JSONParser();String url = jParser.getJSONStringFromUrl("https://maps.googleapis.com/maps/api/place/search/json?location=37.78583400,-122.40641700&radius=1500&types=gas_station&sensor=true&key=AIzaSyBIwW4m6xINOhM_j7hckMAbD3oks_fkLFc");
//main json abject
jsonObject = jParser.getJSONObject(url);
//get to the results array:
try {
JSONArray htmlArray = jsonObject.getJSONArray("html_attributions");
JSONArray resultsArray = jsonObject.getJSONArray("results");
//get to the geometry objects
for (int i = 0; i < resultsArray.length(); i++) {
JSONObject geometry = resultsArray.getJSONObject(i);
//get to the location object
JSONObject location = geometry.getJSONObject("location");
//get to the lat string
double lati = Double.parseDouble(location.getString("Lat"));
double longi = Double.parseDouble(location.getString("lng"));
//create a latlong object
place = new LatLng(lati,longi);
/*//set the map
Marker melbourne = map.addMarker(new MarkerOptions()
.position(place)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
//set the camera
cameraUpdate = CameraUpdateFactory.newLatLngZoom(place, 10);
map.animateCamera(cameraUpdate);*/
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Long result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
//set the map
Marker melbourne = map.addMarker(new MarkerOptions()
.position(place)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
//set the camera
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(place, 10);
map.animateCamera(cameraUpdate);
}
}
//这是我的jsonparser类公共类JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
static JSONArray jArray = null;
// constructor
public JSONParser() {
}
public String getJSONStringFromUrl(String url) {
// Making HTTP request
try {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// return JSON String
return json;
}
public JSONObject getJSONObject(String url) {
// try parse the string to a JSON object
getJSONStringFromUrl(url);
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser Object",
"Error parsing jsonObject " + e.toString());
}
// return JSON String
return jObj;
}
public JSONArray getJSONArray(String url) {
// try parse the string to a JSON array
getJSONStringFromUrl(url);
try {
jArray = new JSONArray(json);
} catch (JSONException e) {
Log.e("JSON Parser Array",
"Error parsing jsonArray " + e.toString());
}
// return JSON String
return jArray;
}
}
这里是json数据
{
"html_attributions": [
],
"results": [
{
"geometry": {
"location": {
"lat": 37.7774450,
"lng": -122.4048230
}
},
"icon": "http://maps.gstatic.com/mapfiles/place_api/icons/gas_station-71.png",
"id": "8e31a915604dd3597225152bfd3ec6f9bfa39395",
"name": "Chevron",
"photos": [
{
"height": 640,
"html_attributions": [
"From a Google User"
],
"photo_reference": "CnRiAAAADAcSOQpR_AW86egDLCWLpuEf00zuXUVFbcxh5-zCY5OzIUtJx764rn2mLnWTMA0xsz3AG7e0ZbU3n_GTJcOI0O15N1Va34GhUMiXirAw6h0DUETlElRwzvNjv1sQoFdimUYCOg-Us4ow9hoeq4cx-RIQSqRYof89YFdoVKRokkHN6RoUT4nJ4eofBuD1pJgwVeIKiaOlVo4",
"width": 480
}
],
"rating": 3.20,
"reference": "CnRkAAAAQ8TbCf9PqmO-_2-vgbFdrKE9j5PIknybR43IdTMziGYAuj5yOW3PcCCfLMgaeEM0ulLWU2WI3-YX14d1bza8tDYAEQlsP4JMTRT1RAeCm_CzhhhcZaB6UZ2Q2_f33iNHxMvoPumNwef6OXXmPQkusxIQ80SUv_R8odDO1dds5ovKZBoURT26TM5W2qKebWGQxfPE0SRgLwQ",
"types": [
"car_repair",
"gas_station",
"establishment"
],
"vicinity": "1000 Harrison Street, San Francisco"
},
],
"status": "OK"
}
答案 0 :(得分：1)
答案 1 :(得分：0)
我如何解析谷歌地方响应以获取位置名称：
//data is a String with your JSON
JSONObject jsonObject = new JSONObject(data);
JSONArray googlePlaces = jsonObject.getJSONArray("results");
String[] googlePlacesNames = getStringFromJsonArray(googlePlaces, "name");
private String[] getStringFromJsonArray(JSONArray source, String fieldName){
String result[] = new String[source.length()];
JSONObject json;
try {
for (int i=0; i<source.length();i++) {
json = source.getJSONObject(i);
result[i]=json.getString("name");
Log.d("Places", "Next museum: " + result[i]);
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
使用GSON解析JSON对象的建议值得关注。顺便说一下，杰克逊库可以成为json解析的更好解决方案：http://jackson.codehaus.org/
答案 2 :(得分：0)
这种将JSON String传递给Object的方式更容易出错。我的建议是使用Spring RestTemplate你不必手动操作JSON对象。在序列化和淡化JSON字符串时，RestTemplate将为您完成所有工作。您只需要一个实体类，您将拥有与加油站相关的所有字段。您甚至可以从RestTemplate申请加油站列表。这是一个处理Java对象的问题，而不是手动操作JSON字符串的负担。
RestTemplate restTemplate = new RestTemplate();
List<GasStation> stations = (List) restTemplate.getForObject(yourURL, List.class);
以上代码将为您提供代码中的加油站列表。