问题
I find so many answer but it indicate the string and i want all jsonobjects LINK1 LINK2
Here is my json
{
timestamp: 1471845537300,
list: {
724206: {
id: "724206",
name: "HINGIS M. (SUI)",
points: "10790",
ranking: "1",
tour: "WTA-D",
lastUpdate: "2016-08-15"
},
724207: {
id: "724207",
name: "MIRZA S. (IND)",
points: "10790",
ranking: "2",
tour: "WTA-D",
lastUpdate: "2016-08-15"
},
724208: {
id: "724208",
name: "GARCIA C. (FRA)",
points: "6210",
ranking: "3",
tour: "WTA-D",
lastUpdate: "2016-08-15"
},
724209: {
id: "724209",
name: "MLADENOVIC K. (FRA)",
points: "6045",
ranking: "4",
tour: "WTA-D",
lastUpdate: "2016-08-15"
},
type: "TENNIS RANKING"
}
}
i added a screenshot so u can batter understand
I tried this.
public class GetData extends AsyncTask<String, Void, Void> {
String responseString;
Response response;
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(String... str) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("MY url")
.build();
try {
response = client.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
{
responseString = response.body().string();
System.out.println(responseString);
response.body().close();
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (responseString != null) {
try {
JSONObject jObject = new JSONObject(responseString).getJSONObject("list");
Iterator<String> keys = jObject.keys();
while (keys.hasNext()) {
String key = keys.next();
Log.v("**********", "**********");
Log.v("list key", key);
JSONObject innerJObject = jObject.getJSONObject(key);
Iterator<String> innerKeys = innerJObject.keys();
while (innerKeys.hasNext()) {
String innerKkey = keys.next();
String value = innerJObject.getString(innerKkey);
Log.v("key = " + key, "value = " + value);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}else{
Toast.makeText(getActivity(), "Couldn't get response", Toast.LENGTH_SHORT).show();
}
}
}
LOGCAT:
08-22 15:11:51.222 12592-12592/com.bicubic.tennis V/list key: type
08-22 15:11:51.222 12592-12592/com.bicubic.tennis V/key = type: value = TENNIS RANKING
08-22 15:11:51.222 12592-12592/com.bicubic.tennis V/list key: 725406
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725406, name = NICOLAS MAHUT (FRA), points = 9475, ranking = 1, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725407
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725407, name = PIERRE-HUGUES HERBERT (FRA), points = 9085, ranking = 2, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725408
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725408, name = MARCELO MELO (BRA), points = 7620, ranking = 3, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725409
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725409, name = JAMIE MURRAY (GBR), points = 6805, ranking = 4, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725410
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725410, name = BOB BRYAN (USA), points = 5750, ranking = 5, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725411
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725411, name = MIKE BRYAN (USA), points = 5750, ranking = 6, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725412
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725412, name = IVAN DODIG (CRO), points = 5630, ranking = 7, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725413
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725413, name = BRUNO SOARES (BRA), points = 5480, ranking = 8, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725414
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725414, name = HORIA TECAU (ROU), points = 5420, ranking = 9, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725415
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725415, name = RAVEN KLAASEN (RSA), points = 5120, ranking = 10, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725416
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725416, name = JEAN-JULIEN ROJER (NED), points = 4810, ranking = 11, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725417
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725417, name = DANIEL NESTOR (CAN), points = 4440, ranking = 12, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725418
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725418, name = EDOUARD ROGER-VASSELIN (FRA), points = 4350, ranking = 13, tour = ATP-D, lastUpdate = 2016-08-22
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/list key: 725419
08-22 15:11:51.223 12592-12592/com.bicubic.tennis V/details: id = 725419, name = VASEK POSPISIL (CAN), points = 4330, ranking = 14, tour = ATP-D, lastUpdate = 2016-08-22
回答1:
Provided your JSON is like this,
{
"timestamp": 1471845537300,
"list": {
"724206": {
"id": "724206",
"name": "HINGIS M. (SUI)",
"points": "10790",
"ranking": "1",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
},
"724207": {
"id": "724207",
"name": "MIRZA S. (IND)",
"points": "10790",
"ranking": "2",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
},
"724208": {
"id": "724208",
"name": "GARCIA C. (FRA)",
"points": "6210",
"ranking": "3",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
},
"724209": {
"id": "724209",
"name": "MLADENOVIC K. (FRA)",
"points": "6045",
"ranking": "4",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
},
"type": "TENNIS RANKING"
}
}
NOTE : I was not sure if type is outside or inside the list object. I considered it to be inside the list object (which shouldn't be the case usually).
Here is a Quick and dirty solution on how to parse this, You can use the instanceof keyword to check if the data is a String or a JSONObject. The problem is if you get something other than a String or a JSONObject it will not be parsed.
try {
JSONObject jObject = new JSONObject(responseString).getJSONObject("list");
Iterator<String> keys = jObject.keys();
while (keys.hasNext()) {
String key = keys.next();
Log.v("list key", key);
if(jObject.get(key) instanceof JSONObject) {
JSONObject innerJObject = jObject.getJSONObject(key);
String id = innerJObject.getString("id");
String name = innerJObject.getString("name");
String points = innerJObject.getString("points");
String ranking = innerJObject.getString("ranking");
String tour = innerJObject.getString("tour");
String lastUpdate = innerJObject.gettString("lastUpdate");
Log.v("details", "id = " + id + ", " + "name = " + name + ", " + "points = " + points + ", " + "ranking = " + ranking + ", " + "tour = " + tour + ", " + "lastUpdate = " + lastUpdate);
} else if (jObject.get(key) instanceof String){
String value = jObject.getString("type");
Log.v("key = type", "value = " + value);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
Output,
list key: 724207
details: id = 724207, name = MIRZA S. (IND), points = 10790, ranking = 2, tour = WTA-D, lastUpdate = 2016-08-15
list key: 724208
details: id = 724208, name = GARCIA C. (FRA), points = 6210, ranking = 3, tour = WTA-D, lastUpdate = 2016-08-15
list key: 724209
details: id = 724209, name = MLADENOVIC K. (FRA), points = 6045, ranking = 4, tour = WTA-D, lastUpdate = 2016-08-15
list key: type
key = type: value = TENNIS RANKING
list key: 724206
details: id = 724206, name = HINGIS M. (SUI), points = 10790, ranking = 1, tour = WTA-D, lastUpdate = 2016-08-15
回答2:
First of all your json is incorrect as you can validate it on jsonlint
http://www.jsonlint.com/
this is what i am facing while validating your json
Error: Parse error on line 1:
{ timestamp: 147184553
----^
Expecting 'STRING', '}', got 'undefined'
回答3:
You should use retrofit with gson or jackson to call an API
There is nice explanation on it https://guides.codepath.com/android/Consuming-APIs-with-Retrofit
with using retrofit , you no need to write asyncTask as well.
There is also another library volley to call an API.
回答4:
First you need to make it a valid JSON as it is invalid. You can rewrite JSON like this to make it valid and easily parsable.
{
"timestamp": 1471845537300,
"list": [{
"id": "724206",
"name": "HINGIS M. (SUI)",
"points": "10790",
"ranking": "1",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
}, {
"id": "724207",
"name": "MIRZA S. (IND)",
"points": "10790",
"ranking": "2",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
}, {
"id": "724208",
"name": "GARCIA C. (FRA)",
"points": "6210",
"ranking": "3",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
}, {
"id": "724209",
"name": "MLADENOVIC K. (FRA)",
"points": "6045",
"ranking": "4",
"tour": "WTA-D",
"lastUpdate": "2016-08-15"
}]}
You can parse JSON like this:
//Create an object
JSONObject obj = new JSONObject(responseString);
obj.optLong("timestamp");
//access your list array
JSONArray list = obj.optJSONArray("list");
for (int i = 0; i < list.length(); i++) {
JSONObject post = list.optJSONObject(i);
post.optString("id");
post.optString("name");
post.optString("points");
post.optString("ranking");
post.optString("tour");
post.optString("lastUpdate");
//do whatever you wants to do with these strings
}
来源：https://stackoverflow.com/questions/39073000/how-to-get-all-json-object