I have a problem with JSON
I get a json since https://proxyepn-test.epnbn.net/wsapi/epn
But when I want to display a single data eg "name".
The console displays:
Log
org.json.JSONException: No value for Name
org.json.JSONException: Value status at 0 of the type java.lang.String can not be converted to JSONObject
Can you help me ?
Thanks.
here is my code :
String test2 = test.execute(restURL).get().toString();
Log.i("result",test2);
JSONObject obj = new JSONObject(test2);
String data = obj.getString("data");
Log.i("testjson",data);
String pageName = obj.getJSONObject("data").getString("Name");
Log.i("testjsondata",pageName);
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
Try below:
JSONObject obj = new JSONObject(test2);
JSONObject data = obj.getJSONObject("data");
Iterator<String> iterator = data.keys();
while(iterator.hasNext()){
String key = iterator.next();
String Name = data.getString(key);
}
JSONObject obj = new JSONObject(test2);
JSONObject data=obj.getJSONobject("data");
JSONObject ob1=obj.getJSONobject("1");
String pageName = ob1.getString("Name");
You have to parse your next level of JSONObject (labeled as "1","2","3".. from response).
It seems like issue in Json response structure you shared. why cann't it be array inside "data"?
Then you can easily read data as JSONArray with those objects as ("1","2","3"..) array item.
Else
Android JSON parsing of multiple JSONObjects inside JSONObject
Related
I'm working on parsing some JSON in my android application, this is the code I started off with:
JSONObject jsonObject = **new JSONObject(result);**
int receivedCount = **jsonObject.getInt("CurrentCount");**
However this is causing it to error (The code that would error is surrounded with asterisks) in Android Studio, I tried using the suggestion feature which asked me if I want "Surround with try/catch" which would cause the app to crash when it launched.
This is the suggested code:
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(result);
} catch (JSONException e) {
e.printStackTrace();
}
int receivedCount = 0;
try {
receivedCount = jsonObject.getInt("CurrentCount");
} catch (JSONException e) {
e.printStackTrace();
}
This is the JSON I'm trying to pass:
[{"CurrentCount":"5"},{"CurrentCount":"0"},{"CurrentCount":"1002"}]
Thanks in advance!
J_Dadh I think first of all you should look through the documentation on how to use Json Parser which you can find in the following Link https://www.tutorialspoint.com/android/android_json_parser.htm
EXAMPLE JSON
{
"sys":
{
"country":"GB",
"sunrise":1381107633,
"sunset":1381149604
},
"weather":[
{
"id":711,
"main":"Smoke",
"description":"smoke",
"icon":"50n"
}
],
"main":
{
"temp":304.15,
"pressure":1009,
}
}
String YourJsonObject = "JsonString"
JSONObject jsonObj = new JSONObject(YourJsonObject);
JSONArray weather = jsonObj.getJSONArray("weather");
for (int i = 0; i < weather.length(); i++) {
JSONObject c = weather.getJSONObject(i);
String id = c.getString("id");
String main= c.getString("main");
String description= c.getString("description");
}
as you pasted your JSON you are using [{"CurrentCount":"5"},{"CurrentCount":"0"},{"CurrentCount":"1002"}]
-If we analyze this JSON,This JSON contains a JSON ARRAY [{"CurrentCount":"5"},{"CurrentCount":"0"},{"CurrentCount":"1002"}]
having 3 JSON Objects{"CurrentCount":"5"},{"CurrentCount":"0"},{"CurrentCount":"1002"}
-But when you are going to parse this JSON, you are accepting it as jsonObject = new JSONObject(result),but you should accept it asJSONArray jsonArray=new JSONArray(result);
and then you iterate a loop(e.g,for loop) on this jsonArray,accepting JSONObjects 1 by 1,then getting the values from the each JSONObject 1 by 1.
-1 more mistake in your JSON is that you are sending the strings as "5" but accepting it as getInt() that's not fair,you should send int to accept it as intas 5 (without double qoutes)
So you final JSON and code like this(as below)
JSON
[{"CurrentCount":5},{"CurrentCount":0},{"CurrentCount":1002}]
Code to Use this JSON
JSONOArray jsonArray = null;
try{
jsonArray = new JSONArray(result);
for(int i=0;i<jsonArray.length;i++){
JSONObject jsonObject=jsonArray[i];
receivedCount=jsonObject.getInt("CurrentCount");
}
}catch(JSONException e) {
e.printStackTrace();
}
I have to send request body in Http request in below format:
{
"flag":false,
"Ids":["xyz","abc"]
}
I was trying like:
LinkedHashMap<String, Object> requestParamsMap = new LinkedHashMap<String, Object>();
requestParamsMap.put("flag",false);
ArrayList<String> IdList = new ArrayList<>();
IdList.add("xyz");
IdList.add("abc");
requestParamsMap.put("Ids", IdList.toString());
And then I was converting requestParamsMap to json string. But I am not getting request body in desired format.
I want to create a generalized method which can return me data in this type of format, so that I can use it throughout application.
Any help would be appreciated.. !!!
Do something like this:
JSONObject object=new JSONObject();
try {
object.put("flag","xyz");
JSONArray array=new JSONArray();
array.put("xyz");
array.put("abc");
object.put("Ids",array);
//added a log to see the output
Log.e("output",object.toString());
} catch (JSONException e) {
e.printStackTrace();
}
object.toString() should contain exactly the json you want in string format. You can use a loop to populate the contents of the jsonArray or JSONObject depending on the number of items you have
Its not that though at all, output you want is JSONArray inside JSONObject and JSONObject inside another JSONObject. So, you can create them seperately and then can put in together. as below.
CODE
try {
JSONObject parent = new JSONObject();
JSONObject jsonObject = new JSONObject();
JSONArray jsonArray = new JSONArray();
jsonArray.put("lv1");
jsonArray.put("lv2");
jsonObject.put("mk1", "mv1");
jsonObject.put("mk2", jsonArray);
parent.put("root", jsonObject);
Log.d("output", parent.toString(2));
} catch (JSONException e) {
e.printStackTrace();
}
OUTPUT
{
"root": {
"mk1": "mv1",
"mk2": [
"lv1",
"lv2"
]
}
}
Raw Json Data
[
{
"worker.1":{
"last_share":1443639029,
"score":"3722204.62578",
"alive":true,
"shares":1124332,
"hashrate":1047253
},
"worker.2":{
"last_share":1443639029,
"score":"3794755.69049",
"alive":true,
"shares":1069332,
"hashrate":1012070
},
"worker.3":{
"last_share":1440778690,
"score":"0.0",
"alive":false,
"shares":0,
"hashrate":0
},
"worker.4":{
"last_share":1443638222,
"score":"940190.67723",
"alive":true,
"shares":449932,
"hashrate":404772
}
"worker.nth":{
"last_share":1443638222,
"score":"940190.67723",
"alive":true,
"shares":449932,
"hashrate":404772
}
}
]
From the main question I have been able to narrow down the results and managed to add the Square bracket as well. Now i have a Json Array above so could someone advise me how can i process this Json array. Also note that it can end up being 1000 workers.
Please please help I have been breaking my head for 2 days on this,
Also note that the actual Json data is complex and 1000's of entries,
The json data included is just an overview.
Edit: Code that I ma using to process the above Json
try{
JSONArray jArray = new JSONArray(jsonObj.getJSONObject("workers"));
if(jArray.length() == 0){
Log.d("Json Err", "JSON string has no entries");
return null;
}
JSONObject jObject = jArray.getJSONObject(0);
// To get one specific element:
JSONObject worker1 = jObject.getJSONObject("worker.1");
JSONObject worker2 = jObject.getJSONObject("worker.2");
// Iterate over all elements
Iterator<?> keys = jObject.keys();
while( keys.hasNext() ) {
String key = (String)keys.next(); // "worker.1", etc
if ( jObject.get(key) instanceof JSONObject ) {
JSONObject entry = jObject.getJSONObject(key);
// Do something with your entry here like:
String score = entry.optString("score", "");
Boolean alive = entry.optBoolean("alive", false);
Integer shares = entry.optInt("shares", 0);
Log.d("Json Success", score );
}
}
} catch (JSONException e){
Log.e("Json Err", "Failure converting JSON String", e);
}
Error that I am getting:
E2570 (5:10 PM):
org.json.JSONException: Value {"worker.1":{"last_share":1443694390,"score":"15.6018529132","alive":true,"shares":59880,"hashrate":0},"worker.2":{"last_share":1443694180,"score":"2.97304689833","alive":true,"shares":2048,"hashrate":0},"worker.3":{"last_share":1440778690,"score":"0.0","alive":false,"shares":0,"hashrate":0},"ivonme.ant4":{"last_share":1443701343,"score":"8688.78118933","alive":true,"shares":203088,"hashrate":78633}}
of type org.json.JSONObject cannot be converted to JSONArray
at org.json.JSON.typeMismatch(JSON.java)
at org.json.JSONArray.(JSONArray.java)
at org.json.JSONArray.(JSONArray.java)
So you have...
{ //JSONObject
"worker.1":{
"last_share":1443639029,
"score":"3722204.62578",
"alive":true,
"shares":1124332,
"hashrate":1047253
},
"worker.2":{
"last_share":1443639029,
"score":"3794755.69049",
"alive":true,
"shares":1069332,
"hashrate":1012070
} //,...
}
To get all your workers you have to...
try{
JSONObject jObject = new JSONObject(yourStringFromYourQuestion);
// To get one specific element:
JSONObject worker1 = jObject.getJSONObject("worker.1");
JSONObject worker2 = jObject.getJSONObject("worker.2");
// Iterate over all elements
Iterator<?> keys = jObject.keys();
while( keys.hasNext() ) {
String key = (String)keys.next(); // "worker.1", etc
if ( jObject.get(key) instanceof JSONObject ) {
JSONObject entry = jObject.getJSONObject(key);
// Do something with your entry here like:
String score = entry.optString("score", "");
Boolean alive = entry.optBoolean("alive", false);
Integer shares = entry.optInteger("shares", 0);
}
}
} catch (JSONException e){
Log.e(LOG_TAG, "Failure converting JSON String", e);
}
Try this:
JSONArray jArray=jsonObj.getJSONArray("workers");
instead of
JSONArray jArray = new JSONArray(jsonObj.getJSONObject("workers"));
The error is because of you are getting json array as object. I think so.
If I have a JSON:
{"list_path":{"149":{"1610":{"file":[]},"1599":{"1600":{"1604":{"1605":{"file":[]},"file":[]},"1601":{"1602":{"file":["f485","f484","f482","f481","f480","f479","f478","f477"]},"file":[]},"file":[]},"file":[]},"1609":{"file":[]},"1607":{"file":[]},"1608":{"file":[]},"1606":{"file":[]},"file":[]}}}
But I don't know the key. How can I get each key.
I try to use String key = iter.next(); but it only can get one key.
Like If I write in 149. I want get 1599, 1606, 1607, 1608, 1609, 1610, file.
Please help me. Thank you.
JSONParser jParser = new JSONParser();
JSONObject jsons = jParser.getJSONFromUrl("http://ap2.finance.xcom.tw:8080/app/?m=z8Ga37UPPQbEDMxR&mode=get_list&user_id=1");
try {
JSONObject status = jsons.getJSONObject("list_path");
Iterator iter = status.keys();
while(iter.hasNext()) {
String key = (String)iter.next();
try {
Object value = jsons.get(key);
} catch (JSONException e) {
Log.d( "Json", "hasNext error");
}
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Try this:
JSONObject obj = new JSONObject(yourJsonString);
JSONObject listPathObject = obj.getJSONObject("list_path");
JSONObject object149 = listPathObject.getJSONObject("149");
Iterator<String> iter = object149.keys(); //This should be the iterator you want.
while(iter.hasNext()){
String key = iter.next();
}
You will get keys:
1610
1599
1609
1607
1608
1606
file
parse your json hierarchy through http://json.parser.online.fr/
then check how many JSON-objects are there.
there ur code is right in "list_path" there is only single key.
But inside "149" JSON-Object there are 6 Objects wd integer key and one with "file" keyname.
{
"status": "ERROR",
"msg_content": "Your old password was entered incorrectly. Please enter it again.",
"code": "400",
"msg_title": "Sorry. Error in processing your request"
}
if (str.startsWith("Bad Request"))
{
textview.setText(" ");
}
How to print inside the textview to display the msg_content using json
You need to parse json using JSON object.
JSONObject obj = new JSONObject(str);
Then find string from JSON object whatever you want.
if (obj.has("msg_content")) {
String value = obj.getString("msg_content");
textview.settext(value);
}
You will need to create a JSONObject and pass it the string as a parameter.
JSONObject obj = new JSONObject(str);
Then to find a key in the JSONObject just call, always check if the JSONObject has that key before trying to retrieve it.
if (obj.has("status"){
String status = obj.getString("status");
}
if (obj.has("msg_content"){
String content = obj.getString("msg_content");
textview.setText(content);
}
JsonReader is implemented in API 11. If you want to use it in GingerBread or below try this
Use following Code for extracting Information from JSON Objects:
try {
Iterator keys = jsonObject.keys();
while (keys.hasNext()) {
String key = (String) keys.next();
if(key.equals("msg_content"))
textView.setText(jsonObject.getString(key));
}
} catch (JSONException e) {
e.printStackTrace();
}
Also, if u have JSON as String, u can populate an object using following code:
try {
jsonObject = new JSONObject(theJsonString);
} catch (JSONException e1) {
e1.printStackTrace();
}
I'm quite new to JSON but I would create a JsonReader and parse the JSON as per here