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Parsing a Json array witout array name

LineGraphSeries<DataPoint> series;
ArrayList<HashMap<String, String>> arrayListData;
public static String data;
TextView graphOneTV, graphTwoTV, graphThreeTV;
GraphView graph;
String x, y;
public Graph_Fragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_graph_, container, false);
}
HttpURLConnection connection;
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
graphOneTV = (TextView) getView().findViewById(R.id.TVGraph1);
graphTwoTV = (TextView) getView().findViewById(R.id.TVGraph2);
graphThreeTV = (TextView) getView().findViewById(R.id.TVGraph3);
graph = (GraphView) getView().findViewById(R.id.graph1);
//graphDataClass gdc = new graphDataClass();
//gdc.execute();
String strJson="{ \"Employee\" :[{\"id\":\"101\",\"name\":\"Sonoo Jaiswal\"," +
"\"salary\":\"50000\"},{\"id\":\"102\",\"name\":\"Vimal Jaiswal\",\"salary\":\"60000\"}] }";
String data = "";
try {
// Create the root JSONObject from the JSON string.
JSONObject jsonRootObject = new JSONObject(strJson);
//Get the instance of JSONArray that contains JSONObjects
JSONArray jsonArray = jsonRootObject.optJSONArray("Employee");
//Iterate the jsonArray and print the info of JSONObjects
for(int i=0; i < jsonArray.length(); i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
int id = Integer.parseInt(jsonObject.optString("id").toString());
String name = jsonObject.optString("name").toString();
float salary = Float.parseFloat(jsonObject.optString("salary").toString());
data += "Node"+i+" : \n id= "+ id +" \n Name= "+ name +" \n Salary= "+ salary +" \n ";
}
graphOneTV.setText(data);
} catch (JSONException e) {e.printStackTrace();}}}
So I was trying to parse JSON array by using the above code and it worked but later I was trying to fetch the JSON from my localhost pc but that JSON is not having a array name. The json which i am trying to fetch is given below.
[{"twitter":"200","googleplus":"60"},{"twitter":"150","googleplus":"180"},{"twitter":"90","googleplus":"120"}]
The code for fetching and parsing this JSON array is given below.
LineGraphSeries<DataPoint> series;
ArrayList<HashMap<String, String>> arrayListData;
public static String data,data2;
TextView graphOneTV, graphTwoTV, graphThreeTV;
GraphView graph;
//String x, y;
public Graph_Fragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_graph_, container, false);
}
HttpURLConnection connection;
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
graphOneTV = (TextView) getView().findViewById(R.id.TVGraph1);
graphTwoTV = (TextView) getView().findViewById(R.id.TVGraph2);
graphThreeTV = (TextView) getView().findViewById(R.id.TVGraph3);
graph = (GraphView) getView().findViewById(R.id.graph1);
graphDataClass gdc = new graphDataClass();
gdc.execute();
/*String strJson="{ \"Employee\" :[{\"id\":\"101\",\"name\":\"Sonoo Jaiswal\"," +
"\"salary\":\"50000\"},{\"id\":\"102\",\"name\":\"Vimal Jaiswal\",\"salary\":\"60000\"}] }";
String data = "";
try {
// Create the root JSONObject from the JSON string.
JSONObject jsonRootObject = new JSONObject(strJson);
//Get the instance of JSONArray that contains JSONObjects
JSONArray jsonArray = jsonRootObject.optJSONArray("Employee");
//Iterate the jsonArray and print the info of JSONObjects
for(int i=0; i < jsonArray.length(); i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
int id = Integer.parseInt(jsonObject.optString("id").toString());
String name = jsonObject.optString("name").toString();
float salary = Float.parseFloat(jsonObject.optString("salary").toString());
data += "Node"+i+" : \n id= "+ id +" \n Name= "+ name +" \n Salary= "+ salary +" \n ";
}
graphOneTV.setText(data);
} catch (JSONException e) {e.printStackTrace();}
*/
}
public class graphDataClass extends AsyncTask<String, String, String> {
#Override
protected String doInBackground(String... strings) {
try {
URL url = new URL("http://192.168.1.34/getGraphData.php?");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
InputStream inputStream = connection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
while (line != null) {
line = bufferedReader.readLine();
data = data + line;
}
JSONObject jsonRootObject = new JSONObject(data);
JSONArray jsonArray = jsonRootObject.optJSONArray("");
for(int i=0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int x = Integer.parseInt(jsonObject.optString("twitter").toString());
int y = Integer.parseInt(jsonObject.optString("googleplus").toString());
data2 += "Node" + i + " : \n id= " + x + " \n Name= " + y ;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPreExecute() {
super.onPreExecute();
}
protected void onPostExecute(String s) {
super.onPostExecute(s);
graphOneTV.setText(data2);
}
}
}
But as is said earlier this JSON is not having a array name, so what should I write a the place where array name is required.
JSONArray jsonArray = jsonRootObject.optJSONArray("What show I write HERE ???? (No Array Name in JSON!!!");

modify the php code file
<?php
if($connect){
die('Could Not Connect :'.mysqli_error());
}
$result = mysqli_query($connect,"SELECT * FROM table_name);
while($row=mysqli_fetch_assoc($result)){
$output[]=$row;
}
print(json_encode(array('yourarrayname' =>$output),JSON_PRETTY_PRINT));
mysqli_close($connect);
?>
JSONArray jsonArray = jsonRootObject.optJSONArray("yourarrayname_define_php_json_file");

I Hope this will work for you.
parse like this.
try {
JSONArray jsonArray = new JSONArray(data);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String twitter = jsonObject.getString("twitter");
String googleplus = jsonObject.getString("googleplus");
Log.e("googleplus", googleplus);
Log.e("twitter", twitter);
}
} catch (Exception e) {
}
And add data to arraylist.

If you know your string is a JSON array, then parse the string with JSONArray instead of JSONObject. Then use the array accessors like JSONArray.get.
JSONArray jsonArray = new JSONArray(json);
JSONObject first = jsonArray.optJSONObject(0);
Otherwise use gson:
Type collectionType = new TypeToken<Collection<Map<String, Object>>>(){}.getType();
Collection<Map<String, Object>> items = gson.fromJson(json, collectionType);
Or jackson:
TypeReference<List<Map<String, Object>>> typeReference = new TypeReference<>();
List<Map<String, Object>> items = new ObjectMapper().readValue(json, typeReference);

Try this way :
ArrayList<HashMap<String, String>> arrayListSocial = new ArrayList<>();
String string = "[{\"twitter\":\"200\",\"googleplus\":\"60\"},{\"twitter\":\"150\",\"googleplus\":\"180\"},{\"twitter\":\"90\",\"googleplus\":\"120\"}]";
try {
JSONArray jsonarray = new JSONArray(string);
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject jsonobject = jsonarray.getJSONObject(i);
String socailTwiter= jsonobject.getString("twitter");
String socailGplus = jsonobject.getString("googleplus");
Log.e("socailTwiter",socailTwiter);
HashMap<String, String> hashMap = new HashMap<>();
hashMap .put("twitter",socailTwiter);
hashMap .put("googleplus",socailGplus );
arrayListSocial.add(hashMap);
}
}catch (Exception e){
e.printStackTrace();
}

How to save this JSON Object to Array List in Android

I'm having troubles finding a way how to parse this JSONObject on Java:
{"market_cap":[[1518987267000,183700781183],
[1518987567000,183687424480],
[1518987868000,183687424480],
.
.
.
[1519080954726,7730730000]]}
This is the full json: JSON
I´m looking for save these data on a List Array...
I have updated my full function:
static String urlJsonArry2 = "http://coincap.io/history/1day/BTC";
private JSONObject responseJsonObject;
private void GettingDataGraph(){
progressDialog.setMessage("Getting Data");
progressDialog.show();
JsonArrayRequest req = new JsonArrayRequest(urlJsonArry2,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
ArrayList<Object> MARKET_CAP_ARRAY_LIST = new ArrayList<>();
JSONArray marketCapArray = responseJsonObject.optJSONArray("volume");
for (int i=0; i< marketCapArray.length(); i++){
JSONArray array1 = (JSONArray) marketCapArray.get(i);
for (int j=0; j < array1.length(); j++){
MARKET_CAP_ARRAY_LIST.add(array1.get(j));
}
}
Log.d(TAG, String.valueOf(MARKET_CAP_ARRAY_LIST));
progressDialog.dismiss();
} catch (JSONException e) {
e.printStackTrace();
Log.d(TAG, "ERROR " + e.getMessage());
progressDialog.dismiss();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Log.d(TAG, "ERROR " + error.getMessage());
progressDialog.dismiss();
}
});
AppController.getInstance().addToRequestQueue(req);
}
My updated logcat is this:
D/Volley: [1] 5.onErrorResponse: ListMain
D/ListMain: ERROR org.json.JSONException: Value {"volume":[[1518987267000,9151900000],[1518987567000,9157160000],[1518987868000,9169080000],[1518988166000,9161370000],[1518988467000,9154150000],[1518988765000,9144130000],[1518989067000,9128060000],[1518989366000,9117040000],[1518989665000,9113130000],[1518989965000,9094710000],[1518990267000,9110340000],[1518990567000,9144620000],[1518990868000,9168270000],[1518991167000,9179440000],[1518991467000,9181180000],[1518991767000,9175010000],[1518992067000,9175640000],[1518992366000,9161110000],[1518992667000,9140220000],[1518992966000,9146430000],[1518993266000,9164780000],[1518993567000,9136680000],[1518993866000,9087550000],[1518994167000,9035050000],[1518994466000,8991310000],[1518994766000,8990680000],[1518995067000,8973400000],[1518995367000,8941170000],[1518995667000,8895200000],[1518995966000,8853810000],[1518996267000,8821540000],[1518996566000,8778680000],[1518996867000,8778560000],[1518997167000,8802030000],[1518997467000,8808330000],[1518997767000,8793550000],[1518998068000,8778190000],[1518998367000,8744010000],[1518998667000,8730850000],[1518998967000,8739700000],[1518999266000,8708270000],[1518999566000,8692760000],[1518999867000,8696210000],[1519000167000,8691320000],[1519000467000,8704830000],[1519000768000,8701960000],[1519001067000,8703500000],[1519001366000,8690490000],[1519001666000,8654650000],[1519001966000,8645390000],[1519002266000,8642730000],[1519002567000,8594570000],[1519002867000,8634390000],[1519003166000,8671810000],[1519003466000,8673840000],[1519003769000,8680670000],[1519004068000,8676080000],[1519004369000,8672160000],[1519004666000,8635240000],[1519004969000,8601340000],[1519005266000,8610940000],[1519005567000,8609810000],[1519005869000,8623850000],[1519006173000,8627350000],[1519006467000,8593110000],[1519006765000,8582360000],[1519007066000,8558920000],[1519007367000,8520250000],[1519007666000,8534120000],[1519007969000,8565770000],[1519008268000,8568240000],[1519008568000,8568010000],[1519008867000,8551680000],[1519009168000,8520880000],[1519009467000,8505580000],[1519009769000,8499980000],[1519010069000,8460400000],[1519010368000,8443030000],[1519010667000,8435930000],[1519010969000,8385870000],[1519011267000,8336820000],[1519011567000,8314420000],[1519011866000,8306510000],[1519012167000,8289780000],[1519012467000,8265550000],[1519012767000,8230840000],[1519013067000,8198170000],[1519013368000,8184000000],[1519013668000,8183500000],[1519013967000,8177700000],[1519014268000,8173580000],[1519014567000,8169000000],[1519014868000,8156480000],[1519015166000,8142310000],[1519015466000,8135780000],[1519015767000,8146410000],[1519016067000,8142550000],[1519016368000,8121680000],[1519016668000,8100770000],[1519016967000,8107950000],[1519017268000,8058870000],[1519017566000,7990860000],[1519017867000,7953970000],[1519018169000,7918280000],[1519018467000,7881990000],[1519018768000,7823290000],[1519019067000,7815010000],[1519019366000,7808360000],[1519019667000,7784880000],[1519019968000,7749460000],[1519020267000,7735900000],[1519020566000,7734530000],[1519020865000,7718370000],[1519021166000,7699210000],[1519021467000,7685120000],[1519021767000,7677750000],[1519022067000,7660540000],[1519022365000,7627040000],[1519022666000,7621670000],[1519022966000,7620360000],[1519023267000,7613420000],[1519023568000,7583250000],[1519023867000,7563660000],[1519024167000,7581690000],[1519024467000,7592450000],[1519024767000,7575950000],[1519025068000,7623950000],[1519025368000,7705190000],[1519025666000,7750020000],[1519025967000,7794050000],[1519026267000,7820790000],[1519026567000,7814480000],[1519026868000,7819060000],[1519027167000,7811230000],[1519027467000,7812310000],[1519027766000,7806300000],[1519028069000,7717960000],[1519028367000,7717970000],[1519028666000,7739410000],[1519028967000,7770270000],[1519029267000,7787760000],[1519029567000,7778010000],[1519029867000,7753830000],[1519030166000,7743590000],[1519030467000,7744180000],[1519030767000,7712770000],[1519031066000,7684790000],[1519031367000,7648400000],[1519031667000,7630540
I'm getting a onErrorResponse
In case someone is interested...this code works good for this array:
ArrayList<Object> MARKET_CAP_ARRAY_LIST = new ArrayList<>();
try {
JSONObject jsonObject = new JSONObject(s);
JSONArray jsonArray = jsonObject.getJSONArray("market_cap");
for (int i = 0; i < jsonArray.length(); i++) {
JSONArray array1 = (JSONArray) jsonArray.get(i);
for (int j=0; j < array1.length(); j++){
MARKET_CAP_ARRAY_LIST.add(array1.get(j));
Log.d("ARRAY: ", String.valueOf(MARKET_CAP_ARRAY_LIST));
}
}
} catch (JSONException e) {
e.printStackTrace();
}
Thanks...

You can parse JSON like this.
private void parseJsonObject(JSONObject responseJsonObject) throws JSONException {
ArrayList<Object> MARKET_CAP_ARRAY_LIST = new ArrayList<>();
JSONArray marketCapArray = responseJsonObject.optJSONArray("market_cap");
for (int i=0; i< marketCapArray.length(); i++){
JSONArray array1 = (JSONArray) marketCapArray.get(i);
for (int j=0; j < array1.length(); j++){
MARKET_CAP_ARRAY_LIST.add(array1.get(j));
}
}
}

private class JsonAsyncTask extends AsyncTask<Void, Void, Void> {
String url ;
public JsonAsyncTask(String url) {
this.url = url;
}
#Override
protected Void doInBackground(Void... voids) {
processApiResponse(url);
return null;
}
private void processApiResponse(String url) {
try {
URL jsonUrl = new URL(url);
BufferedReader in = new BufferedReader(new InputStreamReader(jsonUrl.openStream()));
String inputLine;
StringBuilder jsonStringBuilder = new StringBuilder();
while ((inputLine = in.readLine()) != null)
jsonStringBuilder.append(inputLine);
in.close();
String jsonString = jsonStringBuilder.toString();
Volume volume = new Gson().fromJson(jsonString, Volume.class);
System.out.println(volume);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
The POJO classes
private class Volume {
ArrayList<VolumeObject> market_cap;
ArrayList<VolumeObject> volume;
}
private class VolumeObject extends ArrayList<Double> {
}
You can use
// https://mvnrepository.com/artifact/com.google.code.gson/gson
compile group: 'com.google.code.gson', name: 'gson', version: '2.7'
to add Gson in your project.
And to call the AsyncTask in an activity
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dummy);
JsonAsyncTask task = new JsonAsyncTask("http://coincap.io/history/1day/BTC");
task.execute();
}
I hope this helps
Note: For the network operation you can use any other library. Whereas retrofit is preferred by me.

Issue with a for loop over JSON

I seem to be having an issue looping through a JSONObject
The following loop is within a try catch. I am trying to loop through returned JSON, but it skips
try {
JSONObject jsonObject = new JSONObject(result);
// Extract data from json and store into ArrayList as class objects
for(int i = 0; i < jsonObject.length(); i++){
JSONObject jD = jsonObject.getJSONObject(i).;
DataRecipes recipeData = new DataRecipes();
recipeData.image_url = jD.getString("image_url");
recipeData.title = jD.getString("title");
recipeData.publisher = jD.getString("publisher");
data.add(recipeData);
}
} catch (JSONException e) {
Toast.makeText(Main_Food.this, e.toString(), Toast.LENGTH_LONG).show();
}
Response JSON
{"count": 30, "recipes": [{"publisher": "Closet Cooking", "f2f_url": "http://food2fork.com/view/35382", "title": "Jalapeno Popper Grilled Cheese Sandwich", "source_url": "http://www.closetcooking.com/2011/04/jalapeno-popper-grilled-cheese-sandwich.html", "recipe_id": "35382", "image_url": "http://static.food2fork.com/Jalapeno2BPopper2BGrilled2BCheese2BSandwich2B12B500fd186186.jpg", "social_rank": 100.0, "publisher_url": "http://closetcooking.com"}, {"publisher": "The Pioneer Woman",
Code within the onPostExecute.
even with the changes still ignores the inners and moves straight to the catch.
#Override
protected void onPostExecute(String result) {
List<DataRecipes> data = new ArrayList<>();
try {
JSONObject jsonObject = new JSONObject(result);
JSONArray jsonArrayRecipe = jsonObject.getJSONArray("recipes");
for(int i = 0; i < jsonArrayRecipe.length(); i++){
JSONObject jD = jsonArrayRecipe.getJSONObject(i);
DataRecipes recipeData = new DataRecipes();
recipeData.image_url = jD.getString("image_url");
recipeData.title = jD.getString("title");
recipeData.publisher = jD.getString("publisher");
data.add(recipeData);
}
} catch (JSONException e) {
Toast.makeText(Main_Food.this, e.toString(), Toast.LENGTH_LONG).show();
}
// Setup and Handover data to recyclerview
mRVRecipePrice = findViewById(R.id.jsonText);
mAdapter = new AdapterRecipe(Main_Food.this, data);
mRVRecipePrice.setAdapter(mAdapter);
mRVRecipePrice.setLayoutManager(new LinearLayoutManager(Main_Food.this));
}

You need to access the recipe array first
Try this
try {
JSONObject jsonObject = new JSONObject(result);
JSONArray jsonArrayrecipe = jsonObject .getJSONArray("recipes");
for(int i = 0; i < jsonArrayrecipe .length(); i++){
JSONObject jD = jsonArrayrecipe .getJSONObject(i);
DataRecipes recipeData = new DataRecipes();
recipeData.image_url = jD.getString("image_url");
recipeData.title = jD.getString("title");
recipeData.publisher = jD.getString("publisher");
data.add(recipeData);
}
} catch (JSONException e) {
Toast.makeText(Main_Food.this, e.toString(), Toast.LENGTH_LONG).show();
}

i got error about java.lang.String cannot be converted to JSONarray

In my code, I am trying to populate value spinner from a MySQL database, but I can't get the value.
What's wrong on my jsonArray?
java.lang.String cannot be converted to JSONObject
JsonArrayRequest jsonSpinnerObjectRequest = new JsonArrayRequest(fetch_city_url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
try {
JSONObject jsonObject = null;
JSONArray jsonArray = jsonObject.getJSONArray("result");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject city = jsonArray.getJSONObject(i);
Log.i("onResponseSpinner", city.getString("kd_kelas") + " " + city.getString("kelas"));
kelasList.add(city.getString("kelas"));
}
spinnerAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("VOLLEY","ERROR in response"+error.getMessage());
}
});

Here you set a JSON object to null then try to get JSON Array from it:
JSONObject jsonObject = null;
JSONArray jsonArray = jsonObject.getJSONArray("result");
I think you are wanting something like this:
public void onResponse(JSONObject response) {
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray = jsonArray = new jsonObject.getJSONArray("result");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject city = jsonArray.getJSONObject(i);
Log.i("onResponseSpinner", city.getString("kd_kelas") + " " + city.getString("kelas"));
kelasList.add(city.getString("kelas"));
}
spinnerAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}

Looking at your code, i think you are already getting the JSON array in response so just get the values from this JSON array only, please go through the following code
JsonArrayRequest jsonSpinnerObjectRequest = new JsonArrayRequest(fetch_city_url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
try {
for (int i = 0; i < response.length(); i++) {
JSONObject city = response.getJSONObject(i);
Log.i("onResponseSpinner", city.getString("kd_kelas") + " " + city.getString("kelas"));
kelasList.add(city.getString("kelas"));
}
spinnerAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("VOLLEY","ERROR in response"+error.getMessage());
}
});

How extract JSONObject from JSONArray in android

I want to read only the "value" object from this jsonarray
"body":{"und":[{"value":"hi friends!!!","summary":null,"format":null}]}
This is my code:
protected void onPostExecute(final JSONObject result) {
try {
TextView lst2 = (TextView) findViewById(R.id.View2);
JSONArray cast = result.getJSONArray("body");
for (int i=0; i<cast.length(); i++) {
JSONObject actor = cast.getJSONObject(i);
String name = actor.getString("value");
lst2.setText(name);
}
} catch (Exception e2) {
Log.v("Error adding article", e2.getMessage());
}
}
JSONObject result is the response from the rest server.

body is not array its object, you need to get und out of body as JSONArray first
protected void onPostExecute(final JSONObject result) {
try {
TextView lst2 = (TextView) findViewById(R.id.View2);
JSONArray cast = result.getJSONObject("body").getJSONArray("und");
for (int i=0; i<cast.length(); i++) {
JSONObject actor = cast.getJSONObject(i);
String name = actor.getString("value");
lst2.setText(name);
}
} catch (Exception e2) {
Log.v("Error adding article", e2.getMessage());
}
}
Hope it helps