Develop Reference

Json move to next item

I have a dynamic JSON string that looks like this:
{"_id":"7","food_name":"Fiber Balance"},{"_id":"8","food_name":"Sport +"}
I am able to get the first name, but not the second one. This is my code for getting the first (Fiber Balance):
// Dynamic text
TextView textViewDynamicText = (TextView)getActivity().findViewById(R.id.textViewDynamicText);
String stringJSON = textViewDynamicText.getText().toString();
String stringFoodname = "";
try {
JSONObject jsonObject = new JSONObject(stringJSON);
Iterator<String> iter = jsonObject.keys();
while (iter.hasNext()) {
String key = iter.next();
try {
stringFoodname = jsonObject.getString("food_name");
Toast.makeText(getContext(), stringFoodname, Toast.LENGTH_LONG).show();
} catch (JSONException e) {
// Something went wrong!
}
}
} catch (org.json.JSONException e) {
// Something went wrong!
}
How can I go to the next item in the json string?

If you have multiple data than you need to use Array,if you want to get all data from your json use below trick,
String json = "{\"_id\":\"7\",\"food_name\":\"Fiber Balance\"},{\"_id\":\"8\",\"food_name\":\"Sport +\"}";
json = "[" + json + "]";
try {
JSONArray array = new JSONArray(json);
for (int i = 0; i < array.length(); i++) {
JSONObject object = array.getJSONObject(i);
String foodName = object.getString("food_name");
Log.e("FoodName:", foodName);
}
} catch (JSONException e) {
e.printStackTrace();
Log.e("error", "json", e);
}

Regd : getting value from json url

I want to get the id ^& content value in http://rest-service.guides.spring.io/greeting
What i tried is,
try {
JSONObject jsonObj = new JSONObject(parsingUrl);
// If you have array
JSONArray resultArray = jsonObj.getJSONArray("id"); // Here you will get the Array
// Iterate the loop
for (int i = 0; i < resultArray.length(); i++) {
// get value with the NODE key
JSONObject obj = resultArray.getJSONObject(i);
String name = obj.getString("content");
}
// If you have object
//String result1 = jsonObj.getString("result");
} catch (Exception e) {
e.printStackTrace();
}
Thanks

The url that your mentioned dont have json arrays, parsing will be like
try {
JSONObject jsonObj = new JSONObject(resultfromUrl);
int id = jsonObj.getInt("id");
String name = jsonObj.getString("content");
} catch (JSONException e) {
e.printStackTrace();
}

How do i convert from this org.json into jackson parser?

JSONObject jsonObj = new JSONObject(jsonString);
JSONArray jsonArray = jsonObj.getJSONObject("query").getJSONObject("results").getJSONArray("row");
int arrayCount = jsonArray.length();
for(int i=0; i < arrayCount; i++){
JSONObject jsonData = jsonArray.getJSONObject(i);
String col0 = jsonData.getString("col0");
String col1 = jsonData.getString("col1");
// etc, etc ...
// put those values in arrays or whatever here.
}
What is the syntax for the same operation but using the 'Jackson' parsing libary?
I currently have:
JsonFactory f = new MappingJsonFactory();
JsonParser jp = f.createParser(res);
JsonToken current;
current = jp.nextToken();
if (current != JsonToken.START_OBJECT) {
System.out.println("Error: root should be object: quiting.");
return;
}
while (jp.nextToken() != JsonToken.END_OBJECT) {
String fieldName = jp.getCurrentName();
// move from field name to field value
current = jp.nextToken();
if (fieldName.equals("row")) {
if (current == JsonToken.START_ARRAY) {
while (jp.nextToken() != JsonToken.END_ARRAY) {
JsonNode node = jp.readValueAsTree();
Log.e("KFF", node.get("col0").asText());
}
} else {
Log.e("KFF", "Error: records should be an array: skipping.");
jp.skipChildren();
}
} else {
Log.e("KFF", "Unprocessed property: " + fieldName);
jp.skipChildren();
}
}
} catch (JsonParseException e) {
e.printStackTrace();
} catch (JsonProcessingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Example of the data i need to parse:
http://pastebin.com/rhD2d9fx

Accessing json contents in android [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Sending and Parsing JSON in Android
I have a JSON result in the following format which JSON Lint shows this as a Valid Response.
My question is: how do I accesss the content of "reportId0" value "164", "reportId1" value 157,reportId2 value 165, etc are all dynamic values?
My sample code for accessing value of properties.How to get Value reportid And add allvalue in Arraylist?
"properties": {
"link": "",
"approvalsReportCount": 3,
"reportName0": "srcapprovals",
"reportId0": 164,
"reportName1": "Approvals",
"reportId1": 157,
"requests_report_id": "163",
"requests_report_name": "EG approvals",
"reportName2": "fulfillment",
"reportId2": 165
}

This is the best way i found it to get ReportId value.
Below is My code
JSONObject jObj = new JSONObject(result);
JSONObject jsonResultArray = jObj.getJSONObject("results");
JSONObject pro_object = jsonResultArray.getJSONObject("properties");
Iterator keys = pro_object.keys();
while(keys.hasNext()) {
String currentDynamicKey = (String)keys.next();
String value = pro_object.getString(currentDynamicKey);
String upToEightCharacters = currentDynamicKey.substring(0, Math.min(currentDynamicKey.length(), 8));
if(upToEightCharacters.startsWith("reportId"))
{
Log.v("key"," new report ID key " + currentDynamicKey);
Log.v("key"," new report ID key " + pro_object.getString(currentDynamicKey) );
}
}

you can use this
public ArrayList<String> getReportIds() {
boolean isContinue = true;
JSONObject json;
String tag = "reportId";
int i = 0;
ArrayList<String> repIdList = new ArrayList<String>();
JSONObject prop = null;
try {
json = new JSONObject("<your json string>");
prop = json.getJSONObject("properties");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while (isContinue) {
String repId = "";
try {
repId = prop.getString(tag + i);
repIdList.add(repId);
i++;
} catch (JSONException e) {
isContinue = false;
e.printStackTrace();
}
}
return repIdList;
}

You can Try This!!
try {
JSONObject jObj = new JSONObject(result);
JSONObject jsonResultArray = jObj.getJSONObject("results");
Log.v("log_tag","json result Array : "+ jsonResultArray);
JSONObject pro_object = jsonResultArray.getJSONObject("properties");
Iterator keys = pro_object.keys();
while(keys.hasNext()) {
// loop to get the dynamic key
String currentDynamicKey = (String)keys.next();
String value = pro_object.getString(currentDynamicKey);
approvaldto_Key = new All_Approval_Key_dto();
String upToEightCharacters = currentDynamicKey.substring(0, Math.min(currentDynamicKey.length(), 8));
if(upToEightCharacters.startsWith("reportId"))
{
approvaldto_Key.requestId = pro_object.getString(currentDynamicKey);
fetchrecursUserData.add(approvaldto_Key);
}
}
}
catch (JSONException e) {
e.printStackTrace();
}
return fetchrecursUserData;
}

You can try below code
String serial= jsonObject.getJSONObject("response").getString("serialNumber");
or
JSONObject json;
try {
json = new JSONObject(buffer.toString());
String accessToken = json.getString("access_token");
return accessToken;
} catch (JSONException e) {
Log.e("Podcast", "There was an error", e);
}

How stop a for loop when parsing a JSONArray for nameless JSONObject?

I want to parse a JSONArray that contains JSONObjects that have no names and whose (index int) positions within the array changes every week or so. I have attempted to parse a particular Object by it's attributes, but my parser only returns the last Object in the array.
How can i stop my loop when it reaches the object i want to parse and determine the int index of the object for further parsing.
try {
JSONArray jArray = JSONthing.getJSONfromURL("http://something.com");
String attributeiwant = "abc";
for (int i = 0; i < jArray.length(); i++) {
JSONObject alpha = jArray.getJSONObject(i);
String attributeparsed = alpha.getString("widget");
if (attributeparsed == attributeiwant) {
//determine int index of object, so i can parse other attributes
//from same object
}
}
} catch (Exception e) {
Log.e("log_tag", "Error parsing data "+ e.toString());
}

use String.equals for comparing Strings instead of ==
try {
JSONArray jArray = JSONthing.getJSONfromURL("http://something.com");
String attributeiwant = "abc";
for (int i = 0; i < jArray.length(); i++) {
JSONObject alpha = jArray.getJSONObject(i);
String attributeparsed = alpha.getString("widget");
if (attributeparsed.equals(attributeiwant)) {
//determine int index of object, so i can parse other attributes
//from same object
// Get data from JsonObject
break;
}
}
} catch (Exception e) {
Log.e("log_tag", "Error parsing data "+ e.toString());
}

use break; statement to break the loop, change your code to following:
int i = 0;
try {
JSONArray jArray = JSONthing.getJSONfromURL("http://something.com");
String attributeiwant = "abc";
for (; i < jArray.length(); i++) {
JSONObject alpha = jArray.getJSONObject(i);
String attributeparsed = alpha.getString("widget");
if (attributeparsed.equals(attributeiwant)) {
//determine int index of object, so i can parse other attributes
//from same object
break;
}
}
} catch (Exception e) {
Log.e("log_tag", "Error parsing data "+ e.toString());
}
if(i<jArray.length())
{
//item found, use i as index of object.
}
else
//item not found.