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How to convert all json file. Program read path of JSON file

I try convert json file to object, it run when i use one trans-unit but appears problem when i try read two trans unit. Program read only path of json. I use JSONParser and JSONObject
JSONParser jsonParser = new JSONParser();
JSONObject obj = (JSONObject) jsonParser.parse(new FileReader(args[1]));
JSONObject transUnit = (JSONObject) obj.get("trans-unit");
id = (String) transUnit.get("id");
if (id == null) {
System.out.println("Id is required parameter!");
return;
}
source = (String) transUnit.get("source");
JSONObject targetList = (JSONObject) transUnit.get("target");
if (targetList != null) {
qualifier = (String) targetList.get("state-qualifier");
targetText = (String) targetList.get("target-text");
}
JSONObject altTransList = (JSONObject) transUnit.get("alt-trans");
if (altTransList != null) {
extype = (String) altTransList.get("extype");
match = (String) altTransList.get("match-quality");
origin = (String) altTransList.get("origin");
sourceAlt = (String) altTransList.get("source");
targetAlt = (String) altTransList.get("target");
}
It run, when I read json file below
"trans-unit": {
"id": "t1",
"source": "Text text text text",
"target": {
"state-qualifier": "exact-match",
"target-text": "Tekst tekst tekst tekst",
},
"alt-trans": {
"extype": "exact-match",
"match-quality": "100%",
"source": "Text text text text",
"target": "Tekst tekst tekst tekst"
}
}
}
But when a read this json:
{
"trans-unit": {
"id": "t1",
"source": "Text text",
"target": {
"state-qualifier": "match",
"target-text": "Tekst tekst"
},
"alt-trans": {
"extype": "match",
"match-quality": "100%",
"source": "Text text",
"target": "Tekst tekst"
}
},
"trans-unit": {
"id": "t2",
"source": "Hello there.",
"target": {
"state-qualifier": "mt",
"target-text": "Cześć"
},
"alt-trans": {
"extype": "TRANSLATION",
"match-quality": "nmt",
"source": "Hello there.",
"target": "Cześć"
}
}
}
JSON dont't read trans unit with id t1 but read only tran-unit t2.
I don't know where the problem lies. Can anyone help?

What do you really want to achieve?
I think the problem is, that the second json data is kind of List or Array.
So you only will get the last "object".
Are you allowed to use any library like gson ? This will make it a lot easier.

Json data parsing and display in List using Codename one

Here I have to parse JSON data getting from Facebook and display in list using Codename one so how can I cast ArrayList with Map.
Here is my Json data
{
"posts": {
"data": [
{
"story": "Gaurav Takte shared a link.",
"created_time": "2017-02-14T19:08:34+0000",
"id": "1323317604429735_1307213186040177"
},
{
"story": "Gaurav Takte shared a link.",
"created_time": "2017-02-02T14:22:50+0000",
"id": "1323317604429735_1295671703860992"
},
{
"message": "Hurray....... INDIA WON KABBADI WORLD CUP 2016",
"created_time": "2016-10-22T15:55:04+0000",
"id": "1323317604429735_1182204335207730"
},
{
"story": "Gaurav Takte updated his profile picture.",
"created_time": "2016-10-21T05:35:21+0000",
"id": "1323317604429735_1180682575359906"
},
{
"message": "Friends like all of you … I would love to keep forever.
#oldmemories with # besties
#happydays",
"story": "Gaurav Takte with Avi Bhalerao and 5 others.",
"created_time": "2016-10-21T05:33:55+0000",
"id": "1323317604429735_1180682248693272"
},
{
"message": "\"सर्वांना गणेशचतुर्थीच्या हार्दीक शुभेच्छा.
तुमच्या मनातील सर्व मनोकामना पूर्ण होवोत , सर्वांना
सुख, समृध्दी, ऎश्वर्य,शांती,आरोग्य लाभो हीच
बाप्पाच्या चरणी प्रार्थना. \"
गणपती बाप्पा मोरया , मंगलमुर्ती मोरया !!!",
"story": "Gaurav Takte with Avi Bhalerao and 18 others.",
"created_time": "2016-09-05T05:06:58+0000",
"id": "1323317604429735_1133207030107461"
}
]
}
}
So how can I parse it and also display in list manner in Codename one.

Check out the JSONParser class in Codename One which the developer guide covers.
The sample from the guide is pasted below but I suggest reading it there as it is properly annotated there:
Form hi = new Form("JSON Parsing", new BoxLayout(BoxLayout.Y_AXIS));
JSONParser json = new JSONParser();
try(Reader r = new InputStreamReader(Display.getInstance().getResourceAsStream(getClass(), "/anapioficeandfire.json"), "UTF-8")) {
Map<String, Object> data = json.parseJSON(r);
java.util.List<Map<String, Object>> content = (java.util.List<Map<String, Object>>)data.get("root");
for(Map<String, Object> obj : content) {
String url = (String)obj.get("url");
String name = (String)obj.get("name");
java.util.List<String> titles = (java.util.List<String>)obj.get("titles");
if(name == null || name.length() == 0) {
java.util.List<String> aliases = (java.util.List<String>)obj.get("aliases");
if(aliases != null && aliases.size() > 0) {
name = aliases.get(0);
}
}
MultiButton mb = new MultiButton(name);
if(titles != null && titles.size() > 0) {
mb.setTextLine2(titles.get(0));
}
mb.addActionListener((e) -> Display.getInstance().execute(url));
hi.add(mb);
}
} catch(IOException err) {
Log.e(err);
}
hi.show();

Try this,
JSONObject obj=new JSONObject(response);
JSONObject posts_obj=obj.getJSONObject("posts");
JSONArray data_arr=posts_obj.getJSONArray("data");
for(int i=0;i<data_arr.length();i++) {
JSONObject data_obj=data_arr.getJSONObject(i);
String story = data_obj.getString("story");
String created_time = data_obj.getString("created_time");
String id = data_obj.getString("id");
if(data_obj.has("message")) {
String message = data_obj.getString("message");
}
}

How to access JSON data with multiple array objects : android

I am stuck in getting the data from the JSON file with multiple data sets.
{
"status": "ok",
"count": 3,
"count_total": 661,
"pages": 133,
"posts": [
{
"id": 20038,
"type": "post",
"slug": "xperia-launcher-download",
"url": "http:\/\/missingtricks.net\/xperia-launcher-download\/",
"status": "publish",
"title": "Download Xperia Launcher app for Android (Latest Version)"
},
{
"id": 94,
"type": "post",
"slug": "top-free-calling-apps-of-2014-year",
"url": "http:\/\/missingtricks.net\/top-free-calling-apps-of-2014-year\/",
"status": "publish",
"title": "Best Free Calling Apps for Android November 2014"
},
{
"id": 98,
"type": "post",
"slug": "top-free-calling-apps-of-2016-year",
"url": "http:\/\/missingtricks.net\/top-free-calling-apps-of-2016-year\/",
"status": "publish",
"title": "Best Free Calling Apps for Android December 2016"
}
]
}
I need to access the title, url and status from the above JSON file.
#Override
protected void onPostExecute(String result) {
//this method will be running on UI thread
pdLoading.dismiss();
List<DataFish> data = new ArrayList<>();
pdLoading.dismiss();
try {
JSONArray jArray = new JSONArray(result);
// Extract data from json and store into ArrayList as class objects
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
DataFish fishData = new DataFish();
fishData.status = json_data.getString("status");
fishData.title = json_data.getString("url");
fishData.sizeName = json_data.getString("title");
data.add(fishData);
}
} catch (JSONException e) {
Toast.makeText(JSonActivity.this, e.toString(), Toast.LENGTH_LONG).show();
Log.d("Json","Exception = "+e.toString());
}
}
I am getting a JSONException with the above code.
What should I do to access the title,status and url from the JSON File?

You have to fetch your JSONArray which is inside a JSONObject , so create a JSONObject and fetch your array with index "posts"
1.) result is a JSONObject so create a JSONObject
2.) Fetch your JSONArray with index value as "posts"
3.) Now simply traverse array objects by fetching it through index
JSONObject jObj = new JSONObject(result);
JSONArray jArray = jObj.getJSONArray("posts");
// Extract data from json and store into ArrayList as class objects
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
DataFish fishData = new DataFish();
fishData.status = json_data.getString("status");
fishData.title = json_data.getString("url");
fishData.sizeName = json_data.getString("title");
data.add(fishData);
}
Note : i don't know weather it is a sample response with shorter version though your json object should ends with } not with , .
[{"id":20038,"type":"post","slug":"xperia-launcher-download","url":"http://missingtricks.net/xperia-launcher-download/","status":"publish","title":"Download
Xperia Launcher app for Android (Latest Version)",
// ^^^ there should be a } not a , to end json
// so make sure to do the correction so it will look like => ...st Version)"},
{"id":94,"type":"post","slug":"top-free-calling-apps-of-2014-year","url":"http://missingtricks.net/top-free-calling-apps-of-2014-year/","status":"publish","title":"Best
Free Calling Apps for Android November 2014", ]
Improvements :
you can use optString to avoid null or non-string value if there is no mapping key
This has two variations
Get an optional string associated with a key. It returns the
defaultValue if there is no such key.
public String optString(String key, String defaultValue) {
fishData.status = json_data.optString("status","N/A");
// will return "N/A" if no key found
or To get empty string if no key found then simply use
fishData.status = json_data.optString("status");
// will return "" if no key found where "" is an empty string

You can validate your JSON here.
If entire JSON getJsonObject() is not working, then you should parse JSON objects & array in multiple arrays then use them.

Android - How to parse specific values from JSON Array and display Toast

New to Android and Java in general and I'm learning how to make a JSON call. To do so, I'm following this guide: http://mobiforge.com/design-development/consuming-json-services-android-apps
Here's where things get confusing for me. The author of that tutorial wants the reader to call this API: http://ws.geonames.org/findNearByWeatherJSON?lat=37lng=122
Which returns a JSON object in this format:
{
"weatherObservation": {
"clouds":"scattered clouds",
"weatherCondition":"n/a",
"observation":"KCFV 090852Z AUTO 06005KT
10SM SCT090 SCT110 24/20 A3000 RMK AO2
SLP148 T02390200 53002",
"windDirection":60,
"ICAO":"KCFV",
"seaLevelPressure":1014.8,
"elevation":225,
"countryCode":"US",
"lng":-95.56666666666666,
"temperature":"23.9",
"dewPoint":"20",
"windSpeed":"05",
"humidity":78,
"stationName":"Coffeyville, Coffeyville
Municipal Airport",
"datetime":"2012-07-09 08:52:00",
"lat":37.083333333333336
}
}
Pretty straight forward, except that the API is no longer valid/has limits. In order to finish the project I've instead opted to call this API: http://api.openweathermap.org/data/2.5/weather?lat=37.77&lon=-122.419
Which returns the JSON in this format
{
"coord": {
"lon": 139,
"lat": 35
},
"sys": {
"country": "JP",
"sunrise": 1369769524,
"sunset": 1369821049
},
"weather": [
{
"id": 804,
"main": "clouds",
"description": "overcast clouds",
"icon": "04n"
}
],
"main": {
"temp": 289.5,
"humidity": 89,
"pressure": 1013,
"temp_min": 287.04,
"temp_max": 292.04
},
"wind": {
"speed": 7.31,
"deg": 187.002
},
"rain": {
"3h": 0
},
"clouds": {
"all": 92
},
"dt": 1369824698,
"id": 1851632,
"name": "Shuzenji",
"cod": 200
}
I can make the call just fine, but how do I display the "main" and "description" strings in the "weather" array? More specifically, how do I display this information as a Toast?
Here's what I have:
protected void onPostExecute(String result){
try {
JSONArray weatherArray = new JSONArray(result);
JSONArray wArray = new JSONArray("weather");
String mainWeather = wArray.getString(1);
String mainDescription = wArray.getString(2);
Toast.makeText(getBaseContext(), mainWeather + " - "
+ mainDescription,Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Log.d("ReadWeatherJSONFeedTask", e.getLocalizedMessage());
}
BecauseI am following the mobiforge Tutorial, I have not deviated anywhere else except for this particular block of code.
Thanks for the help!
Edit:
There are several solutions here that work see #swats and #user3515851. I have chosen #remees-m-syde due to it's simplicity. Primarily because his solution did not require that I go through the for loop.

I have used optJSONArray or optString, instead of getJSONArray or getString as "opt" will return "" if there is no value for that key.. it will not throw any exception like in case of getString()
Try below code
JSONObject rootJsonObj = new JSONObject(result);
JSONArray wArray = rootJsonObj.optJSONArray("weather");
for (int i = 0; i < wArray.length(); i++) {
JSONObject weatherJsonObj = wArray.optJSONObject(i);
String mainWeather = weatherJsonObj.optString("main");
String mainDescription = weatherJsonObj.optString("description");
Toast.makeText(getBaseContext(), mainWeather + " - "
+ mainDescription,Toast.LENGTH_SHORT).show();
}
Parsing issue was there, You should have taken object from response result.
EDIT: No need of try catch block while using optJSONArray or optString.

You are unable to get the data because there is one json object inside the "weather" JSONArray.
JSONArray starts with - [
JSONObject starts with - {,
So first get the JSONArray and then the JSONObject inside it.
"weather": [ ----Array
{ ----Object
"id": 804,
"main": "clouds",
"description": "overcast clouds",
"icon": "04n"
}
]
You have to get this JSONObject and then get the String from it like the below code showing.
JSONObject weatherArray = new JSONObject(result);
JSONArray wArray = weatherArray.getJSONArray("weather");
JSONObject jobj = wArray.getJSONObject(0);
String mainWeather = jobj.getString("main");
String mainDescription = jobj.getString("description");
Toast.makeText(getBaseContext(), mainWeather + " - "
+ mainDescription,Toast.LENGTH_SHORT).show();
When there is multiple object in Array, Get it as below.
JSONObject rootJsonObj = new JSONObject(result);
JSONArray wArray = rootJsonObj.optJSONArray("weather");
for (int i = 0; i < wArray.length(); i++) {
JSONObject weatherJsonObj = wArray.getJSONObject(i);
String mainWeather = weatherJsonObj.getString("main");
String mainDescription = weatherJsonObj.getString("description");
Toast.makeText(getBaseContext(), mainWeather + " - "
+ mainDescription,Toast.LENGTH_SHORT).show();
}

protected void onPostExecute(String result){
try {
JSONObject weatherArray = new JSONObject(result);
JSONArray wArray = weatherArray.getJSONArray("weather");
for(int i=0;i<wArray.length,i++){
JSONObject object=wArray.getJSONObject(i);
String mainWeather=object.getString("main");
String mainDescription=object.getString("description");
Toast.makeText(getBaseContext(), mainWeather + " - "
+ mainDescription,Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
Log.d("ReadWeatherJSONFeedTask", e.getLocalizedMessage());
}
I hope this one will help to you :)

I assume you obtained the weather array from parsing this JSON now to retrieve the values from it
JSONObject object=null;
try {
JSONObject object=array.getJSONObject(0);
String main=object.getString("main");
String description=object.getString("description");
} catch (JSONException e) {
e.printStackTrace();
}
and now use the strings in your toast

Assuming result contains the JSON, here is how to get main, and description form weather :
JSONObject resJSON = new JSONObject(result);
JSONArray weatherArray = resJSON.getJSONArray("weather");
for(int i = 0; i < weatherArray.length(); i++) {
JSONObject weatherJSON = weatherArray.getJSONObject(i);
System.out.println(weatherJSON.getString("main"));
System.out.println(weatherJSON.getString("description"));
}

Recently, I found out json2pojo useful tool for json parsing, works with anything Jackson,Gson,Java etc.
Hope this will help you.

Try this
JSONObject weatherObject = new JSONObject(result);
JSONArray wArray = weatherObject.getJSONArray("weather");
for (int i = 0; i < wArray.length(); i++) {
JSONObject wObject = wArray.getJSONObject(i);
if(wObject.has("description")) {
Log.d("TAG", wObject.getString("description"));
}
if(wObject.has("main")) {
Log.d("TAG", wObject.getString("main"));
}
}

Use this
JSONObject weatherArray = new JSONObject(result);
JSONArray wArray = new JSONArray("weather");
String mainWeather = ((JSONObject)wArray.getJSONObject(0)).getString("main");
String mainDescription = ((JSONObject)wArray.getJSONObject(0)).getString("description");
Toast.makeText(getBaseContext(), mainWeather + " - "
+ mainDescription,Toast.LENGTH_SHORT).show();

Parsing a JSON object within a JSON object

I have a JSON file which contains an array of item objects:
{
"item": [
{
"title": "TitleA",
"link": "http://www.abc.html?partner=rss&emc=rss",
"guid": {
"-isPermaLink": "true",
"#text": "www.abc.html"
},
"atom:link": {
"-rel": "standout",
"-href": "http://www.abc.html?partner=rss&emc=rss"
},
"media:content": {
"-url": "standard.jpg",
"-medium": "image",
"-height": "75",
"-width": "75"
},
"media:description": "This is the description.",
"media:credit": "Reuters",
"description": "In depth description",
"dc:creator": "By test creator",
"pubDate": "Sun, 21 Oct 2012 11:29:12 GMT",
"category": "World"
},
{
"title": "TitleB",
"link": "http://www.abc.html?partner=rss&emc=rss",
"guid": {
"-isPermaLink": "true",
"#text": "www.abc.html"
},
"atom:link": {
"-rel": "standout",
"-href": "http://www.abc.html?partner=rss&emc=rss"
},
"media:content": {
"-url": "standard.jpg",
"-medium": "image",
"-height": "75",
"-width": "75"
},
"media:description": "This is the description.",
"media:credit": "Reuters",
"description": "In depth description",
"dc:creator": "By test creator",
"pubDate": "Sun, 21 Oct 2012 11:29:12 GMT",
"category": "World"
}
]
}
Now I know how to get the "title", but I don't know how I would access the "-url" within "media:content" for example, since it seems to be a JSON object within the Item object. How would I get this value and assign it to a value in my Item class?

try as to get "-url" within "media:content" from current json string :
JSONObject jsonObject = new JSONObject("Your JSON STRING HERE");
JSONArray jsonArray =jsonObject.getJSONArray("item");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObjectitem=
jsonArray.getJSONObject(i);
// get title or link here
String strtitle=jsonObjectitem.getString("title");
//....get other values in same way
// get media:content json object
JSONObject jsonObjectmediacontent =
jsonObjectitem.getJSONObject("media:content");
// get url,medium,...
String strurl=jsonObjectmediacontent.getString("-url");
//....get other values in same way
}

Write below code to parse -url string, it will solve your problem.
JSONObject mMainJsonObj = new JSONObject("Pass Json Response String Here");
JSONArray mItemJsonArray = mMainJsonObj.getJSONArray("item");
for (int i = 0; i < mItemJsonArray.length(); i++) {
JSONObject mJsonObj1 = mItemJsonArray.getJSONObject(i);
String mTitle = mJsonObj1.getString("title");
String mLink = mJsonObj1.getString("link");
JSONObject mJsonObjGuid = mJsonObj1.getJSONObject("guid");
String mIsPermLink = mJsonObjGuid.getString("-isPermaLink");
String mText = mJsonObjGuid.getString("#text");
JSONObject mJsonObjAtomLink = mJsonObj1.getJSONObject("atom:link");
String mRel = mJsonObjAtomLink.getString("-rel");
String mHref = mJsonObjAtomLink.getString("-href");
JSONObject mJsonObjMediaContent = mJsonObj1.getJSONObject("media:content");
String mUrl = mJsonObjMediaContent.getString("-url");
String mMedium = mJsonObjMediaContent.getString("-medium");
String mHeight = mJsonObjMediaContent.getString("-height");
String mWidth = mJsonObjMediaContent.getString("-width");
}
And see below link for more information.
Json Parsing Example

Solution with Jackson: read your JSON into a JsonNode using an ObjectMapper and retrieve your values like this:
// Since JsonNode implements Iterable of itself and cycles through array elements,
// this works
for (final JsonNode element: node)
doSomethingWith(element.get("media:content").get("-url"));