I'm using JSONObject to parse the JSON file and get its contents. Everything goes fine but tags aren't showing in the RecyclerView.
Here's the code :
private void direct_url(){
v_title = findViewById(R.id.vid_title);
String url = kw_url_holder.getText().toString();
String server_tag_url = "https://server.com/json.json";
StringRequest request = new StringRequest(Request.Method.GET, server_tag_url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
String title,views,likes,dislikes,publishedon,duration;
JSONObject object=new JSONObject(response);
title = object.getString("title");
v_title.setText(title);
JSONArray tagsJsonArray = object.getJSONArray("tags");
for(int i=0; i<tagsJsonArray.length();i++){
try {
JSONObject tagObj = new JSONObject();
tagObj = tagsJsonArray.getJSONObject(i);
TagUrlResultsModel tagUrlResultsModel = new TagUrlResultsModel();
tagUrlResultsModel.setV_tags(tagObj.getString(String.valueOf(i)));
url_result.add(tagUrlResultsModel);
}catch (JSONException e){
e.printStackTrace();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.d("error",error.toString());
}
});
url_queue = Volley.newRequestQueue(tags.this);
url_queue.add(request);
}
The JSON:
{
"title": "The Title",
"tags": ["tag1", "tag2"]
}
An error in the logs:
Error: java.lang.String cannot be converted to JSONObject
The problem is inside your for loop in:
JSONObject tagObj = new JSONObject();
tagObj = tagsJsonArray.getJSONObject(i);
TagUrlResultsModel tagUrlResultsModel = new TagUrlResultsModel();
tagUrlResultsModel.setV_tags(tagObj.getString(String.valueOf(i)));
url_result.add(tagUrlResultsModel);
It should be
String tag;
tag = tagsJsonArray.getString(i);
TagUrlResultsModel tagUrlResultsModel = new TagUrlResultsModel();
tagUrlResultsModel.setV_tags(tag);
url_result.add(tagUrlResultsModel);
Using getString() instead of getJSONObject() as the content of that JSONArray is just strings.
That's why you are getting in that catch:
Error: java.lang.String cannot be converted to JSONObject
Related
I created the functions like the json file in the picture. When I send a post request, the response is "Unexpected response code 500" for. I think the problem is caused by json arrays, I don't understand exactly why this error is coming. Server url works fine, successfully post on swift. Thanks
json_array_requested_from_me
private void CreditCardParams(Map<String, String> requestParameters) {
JSONArray creditCardItems = new JSONArray();
JSONObject item_creditCardItems = new JSONObject();
try {
item_creditCardItems.put("CC_NUMBER", "1111");
item_creditCardItems.put("EXP_MONTH", “11”);
item_creditCardItems.put("EXP_YEAR", “1111");
item_creditCardItems.put("CC_CVV", “111”);
item_creditCardItems.put("CC_OWNER", “TEST USER”);
item_creditCardItems.put("INSTALLMENT_NUMBER", "1");
} catch (JSONException e) {
e.printStackTrace();
}
creditCardItems.put(item_creditCardItems);
requestParameters.put("CreditCard", (creditCardItems.toString()));
}
private void CustomerParams(Map<String, String> requestParameters) {
JSONArray CustomerItems = new JSONArray();
JSONObject item_Customer = new JSONObject();
try {
item_Customer.put("FIRST_NAME", "Firstname");
item_Customer.put("LAST_NAME", "Lastname");
item_Customer.put("MAIL", "test#test.com");
item_Customer.put("PHONE", "+11111111");
item_Customer.put("CITY", "Test");
item_Customer.put("STATE", "Test");
item_Customer.put("ADDRESS", "Test");
item_Customer.put("CLIENT_IP", "111.11.11.11”);
} catch (JSONException e) {
e.printStackTrace();
}
CustomerItems.put(item_Customer);
requestParameters.put("Customer", (CustomerItems.toString()));
}
private void ProductParams(Map<String, String> requestParameters) {
JSONArray ProductItems = new JSONArray();
JSONObject item_Product = new JSONObject();
try {
item_Product.put("PRODUCT_ID", "1");
item_Product.put("PRODUCT_NAME", “1”);
item_Product.put("PRODUCT_CATEGORY", “Elec.”);
item_Product.put("PRODUCT_DESCRIPTION", “Info”);
item_Product.put("PRODUCT_AMOUNT", 15.00);
} catch (JSONException e) {
e.printStackTrace();
}
ProductItems.put(item_Product);
requestParameters.put("Product", (ProductItems.toString()));
}
private void ConfigParams(Map<String, String> requestParameters) {
JSONArray configItems = new JSONArray();
JSONObject item = new JSONObject();
try {
item.put("MERCHANT", "TEST1234");
item.put("MERCHANT_KEY", “123”);
item.put("BACK_URL", "localhost");
item.put("PRICES_CURRENCY", "USD");
item.put("ORDER_REF_NUMBER", "RFN0001");
item.put("ORDER_AMOUNT", 15.00);
} catch (JSONException e) {
e.printStackTrace();
}
configItems.put(item);
requestParameters.put("Config", (configItems.toString()));
}
private void post_func(){
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
System.out.println(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println(error);
}
}
){
#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String,String>();
CreditCardParams(params);
CustomerParams(params);
ProductParams(params);
ConfigParams(params);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
As you know, 500 server error is an error caused by an exception in the server. If you don't get an error when you send the JSON file you showed from an http request sender program like postman, the problem is in the JSON object you sent to the server.
I am having an error of data of type org.json.JSONObject cannot be converted to JSONArray
Here is the look of my response
{
"success": "true",
"data": {
"email": "sample#gmail.com",
"session_code": "samplesession"
}
}
here is my code
StringRequest stringRequest = new StringRequest(Request.Method.POST,Config.login, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject obj = new JSONObject(response);
JSONArray details = obj.getJSONArray("data");
if (status_code == 200) {
Log.d("success_to",response);
for (int i=0; i<details.length(); i++) {
JSONObject object = details.getJSONObject(i);
String email = object.getString("email");
Log.d("sample_email", email);
}
finish();
startActivity(new Intent(getApplicationContext(), Profile.class));
}else{
Log.d("error_to","error 404 na");
Toast.makeText(getApplicationContext(), obj.getString("message"), Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
i am still new in android and i am still learning the process, can somebody help me with my problem, this really is killing my time in fixing this error.
There is no array in your json so try like below
JSONObject obj = new JSONObject(response);
JSONObject data=obj.optJSONObject("data");
String email = data.getString("email");
Remove below line from your code
JSONArray details = obj.getJSONArray("data");
for (int i=0; i<details.length(); i++) {
JSONObject object = details.getJSONObject(i);
String email = object.getString("email");
Log.d("sample_email", email);
}
I have a jsonArray response. I need to read this response which contains with 3 jsonArrays.
This is the json response. This is a GET request and send by Volley request.
[
"0x9000",
[
[
"D3521",
"abc"
],
[
"D4212",
"def"
],
[
"D2715",
"hij ."
],
[
"D2366",
"klm"
],
[
"D3660",
"nopq"
]
]
]
Here is the code that I have tried I'm sending a string request.
try{
RequestQueue MyRequestQueue = Volley.newRequestQueue(this);
final String endpoint = "getdoctors";
final String url = SettingsConfig.IP + endpoint;
StringRequest MyStringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
android.util.Log.d("print response",response);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i=0; i<jsonArray.length(); i++){
JSONArray dataArray = (JSONArray) jsonArray;
String code = dataArray.getString(i);
}
} catch (JSONException e) {
e.printStackTrace();
Log.e("Provider Inquiry","JSON error:" + e.getMessage());
Intent intent = new Intent(EChannellingInfoActivity.this,MainMenuActivity.class);
startActivity(intent);
finish();
}
}
}, new Response.ErrorListener() { //Create an error listener to handle errors appropriately.
#Override
public void onErrorResponse(VolleyError error) {
android.util.Log.d("print error", error.toString());
//This code is executed if there is an error.
}
});
MyStringRequest.setRetryPolicy(new DefaultRetryPolicy(0, 0, DefaultRetryPolicy.DEFAULT_TIMEOUT_MS));
MyRequestQueue.add(MyStringRequest);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
There are 3 jsonArrays in this response. How can I categorize/read them one by one.
First Create a class which contains the inner instance
public class InnerObj
{
String id;
String name;
}
Then Create the Class of outer object using the inner object
public class OuterObj
{
String size;
InnerObj values[];
}
Now you can use the OuterObj class as the responseType map it to the response from volley
I want to parse the following JSON file but is starting with [ indicating to me that is an array.
When JSON string starting with [ means the string is JSONArray
how to modify the parser to parse this file?
1. Convert JSON String to JSONArray instead of JSONObject:
JSONArray jsonArray = new JSONArray(json);
2. Change return type of getJSONFromUrl method to JSONArray from JSONObject
3. In doInBackground get response from getJSONFromUrl method in JSONArray:
JSONArray jsonArray = jParser.getJSONFromUrl(URL);
Here is further answers LINK
Here is you can parse your JSON array
JSONArray jsonArray = new JSONArray(response);
String str = (String) jsonArray.get(0);
JSONArray arrayTwo = jsonArray.getJSONArray(1);
for (int i=0; i<arrayTwo.length(); i++){
JSONArray dataArray = arrayTwo.getJSONArray(i);
String code = dataArray.getString(i);
}
I'm trying to build a Quiz game for fun but I'm struggling to figure out how to pull the string I want from a JSONArray in Android Studio
I'm getting the Log of the "JSON" and "results" come up in Logcat but I can't seem to work out how to set my mQuestion variable to the relevant string.
The JSON
{
"response_code":0,
"results":[{
"category":"General Knowledge",
"type":"multiple",
"difficulty":"medium",
"question":"According to the BBPA, what is the most common pub name in the UK?",
"correct_answer":"Red Lion",
"incorrect_answers": [
"Royal Oak",
"White Hart",
"King's Head"
]
}]
}
My code
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Log.i("JSON", s);
try {
JSONObject jsonObject = new JSONObject(s);
String results = jsonObject.getString("results");
Log.i("results", results);
JSONArray arr = new JSONArray(results);
for (int i = 0; i < arr.length(); i++) {
mQuestion = arr.getJSONObject(3).getString("question");
Log.i("Question", mQuestion);
}
} catch (Exception e) {
e.printStackTrace();
}
}
I get in the Logcat is W/System.err: at ...MainActivity$getQuestion.onPostExecute(MainActivity.java:67)
67 is the line containing "mQuestion = arr.getJSONObject(3).getString("question");"
You need to use i you declare in loop:
mQuestion = arr.getJSONObject(i).getString("question");
You are parsing JsonObject and JsonArray wrongly.
use this code:
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Log.i("JSON", s);
try {
JSONObject jsonObject = new JSONObject(s);
JSONArray results = jsonObject.getJSONArray("results");
JSONObject jsonObject1 = results.getJSONObject(0);
Log.i("results", results.toString());
String mQuestion = jsonObject1.getString("question");
Log.i("Question", mQuestion);
} catch (Exception e) {
e.printStackTrace();
}
}
I'm new in JSON, but I try to use all answers and didn't work. Help please, what I doing wrong.
protected void onPostExecute(String s) {
super.onPostExecute(s);
progressDialog.dismiss();
editText.setText(s);
try {
JSONObject jsonObject = new JSONObject(s);
JSONArray resultArray = jsonObject.getJSONArray("query");
addresses = new ArrayList<String>();
for (int i = 0; i<resultArray.length(); i++){
addresses.add(resultArray.getJSONObject(i).getString("Name"));
Log.d("DTA",resultArray.getJSONObject(i).getString("Name"));
}
refreshAdapter();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
It's my JSON for parsing.
{
"query":{
"count":2,
"created":"2016-10-04T19:50:08Z",
"lang":"ru",
"results":{
"rate":[
{
"id":"USDRUB",
"Name":"USD/RUB",
"Rate":"62.8240",
"Date":"10/4/2016",
"Time":"7:21pm",
"Ask":"62.8416",
"Bid":"62.8240"
},
{
"id":"EURRUB",
"Name":"EUR/RUB",
"Rate":"70.3460",
"Date":"10/4/2016",
"Time":"7:21pm",
"Ask":"70.3740",
"Bid":"70.3460"
}
]
}
}
}
That's because query is not an array, it is an object. I guess you want to get the objects from rate, this is how to do it:
try {
JSONObject jsonObject = new JSONObject(s);
JSONObject resultsObject = jsonObject.getJSONObject("results");
JSONArray resultArray = resultsObject.getJSONArray("rate");
... etc... now iterate