I need to retrieve a list of json objects from mysql database, parse it using volley and populate a listview with it. I'm new to php and volley. Here's how I'm trying.
JSON:
{"result":[{"id":"3133482000","name":"John Doe","class":"3A","parent":"admin#gmail.com","status":"0","stopid":"6","busno":"0"},{"id":"0","name":"","class":"","parent":"","status":"0","stopid":"0","busno":"0"},{"id":"334","name":"sam","class":"3a","parent":"","status":"0","stopid":"2","busno":"0"}]}
Android:
JSONArray sts;
public static final String STUDENT_URL = "http://www.smartlbus.esy.es/getAllStudents.php";
students=new ArrayList<Student>();
StringRequest stringRequest = new StringRequest(STUDENT_URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jsonObject=null;
jsonObject = new JSONObject(response);
sts = jsonObject.getJSONArray(JSON_ARRAY);
for (int i = 0; i < sts.length(); i++) {
JSONObject jo = sts.getJSONObject(i);
Student s=new Student();
Toast.makeText(StudentDetails.this,jo.getString(STUDENT_NAME),Toast.LENGTH_SHORT).show();
s.setId(jo.getString(STUDENT_ID));
s.setName(jo.getString(STUDENT_NAME));
s.setClassNo(jo.getString(STUDENT_CLASS));
s.setBusno(jo.getString(STUDENT_BUS));
s.setStatus(Integer.parseInt(jo.getString(STUDENT_STATUS)));
s.setStopid(jo.getString(STUDENT_STOP));
students.add(s);
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
listView.setAdapter(new CustomListAdapter(StudentDetails.this,students));
Please help me out. In case this doesn't meet the standards here, please comment and let me know. I'll take it down.
Try to use Gson to ease your development.
Create your Java POJO Class:
public class StudentList {
List<Student> results;
// setter
public static class Student {
String name;
String id;
String status;
String class;
String stopid;
String busno;
// getter
}
}
Then parse them using GSON in the onResponse() method.
I'd suggest to use Retrofit to make network calls.
Gson gson = new Gson();
StudentList list = gson.fromJson(response);
// populate to ListView using list.getResults()
Try this & also check your URL. Your url not returning any json response.
StringRequest stringRequest = new StringRequest(Request.Method.GET,STUDENT_URL ,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
Log.d("TAG","response :"+response);
JSONObject jsonObject = new JSONObject(response);
sts = jsonObject.getJSONArray(JSON_ARRAY);
for (int i = 0; i < sts.length(); i++) {
JSONObject jo = sts.getJSONObject(i);
Student s=new Student();
Log.d("TAG","Name :"+jo.getString(STUDENT_NAME));
// Toast.makeText(StudentDetails.this,jo.getString(STUDENT_NAME),Toast.LENGTH_SHORT).show();
s.setId(jo.getString(STUDENT_ID));
s.setName(jo.getString(STUDENT_NAME));
s.setClassNo(jo.getString(STUDENT_CLASS));
s.setBusno(jo.getString(STUDENT_BUS));
s.setStatus(Integer.parseInt(jo.getString(STUDENT_STATUS)));
s.setStopid(jo.getString(STUDENT_STOP));
students.add(s);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
e.printStackTrace();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
Related
Below is the response what i am getting i want to get the data from "SourceJson" m not ble to understnd why i am getting "" in source json please help me
{
"incomingOrder": [
{
"Namw": 8510,
"Surname": "00",
"mob": "00",
"phone": "000",
"SourceJson": "{\"cart_gst\":30.21,\"instructions\":\"\",\"order_packing_charges\":30,\"cart_igst_percent\":0,\"cart_sgst\":15.1038,}",
"test": "NotSynced",
"test": "DPA",
}]}
Try this code :
requestQueue = Volley.newRequestQueue(this);
JsonObjectRequest obreq = new JsonObjectRequest(Request.Method.GET, JsonURL,
// The third parameter Listener overrides the method onResponse() and passes
//JSONObject as a parameter
new Response.Listener<JSONObject>() {
// Takes the response from the JSON request
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("incomingOrder");
JSONObject jsonObject = jsonArray.getJSONObject(0);
JSONObject objSourceJson=jsonObject.getJSONObject("SourceJson");
Log.i("IvaSourceJson",objSourceJson.toString());
String cart_gst=objSourceJson.getString("cart_gst");
String instructions=objSourceJson.getString("instructions");
}
// Try and catch are included to handle any errors due to JSON
catch (JSONException e) {
// If an error occurs, this prints the error to the log
e.printStackTrace();
}
}
},
// The final parameter overrides the method onErrorResponse() and passes VolleyError
//as a parameter
new Response.ErrorListener() {
#Override
// Handles errors that occur due to Volley
public void onErrorResponse(VolleyError error) {
Log.e("Volley", "Error");
}
}
);
// Adds the JSON object request "obreq" to the request queue
requestQueue.add(obreq);
As it is JSONArray data is of list type, better not to use jsonArray.getJSONObject(0);.
Use this code for multiple results,
StringRequest request = new StringRequest(Request.Method.GET, "", new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("Response", response);
try {
JSONObject object = new JSONObject(response);
JSONArray array = object.getJSONArray("incomingOrder");
for (int i = 0; i < array.length(); i++){
JSONObject object1 = array.getJSONObject(i);
String name = object1.getString("Namw");
String surname = object1.getString("Surname");
String mob = object1.getString("mob");
String phone = object1.getString("phone");
String sourceJson = object1.getString("SourceJson");
String test = object1.getString("test");
String test1 = object1.getString("test");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.d("Error", error.getMessage());
}
});
Context context;
RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
queue.add(request);
Code this in any method and call the method where the action needed.
I am using Volley to request unsplash API but when I try requesting it as JsonObjectRequest it doesn't give me any errors but I know that is a wrong approach because the data I am receiving is JSONArray
MY APPROACH
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(
Request.Method.GET,
URL,
null,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
if(response!=null){
// Process the JSON
try{
// Loop through the array elements
for (int i = 0; i < response.length(); i++) {
JSONObject js = response.getJSONObject(i);
Log.d("TESTING",js.getString("id"));
}
p.dismiss();
}catch (JSONException e){
e.printStackTrace();
}
}}
},
new Response.ErrorListener(){
#Override
public void onErrorResponse(VolleyError error){
Log.d("TESTING",error.getMessage());
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsonArrayRequest);
LOG
Since the JSONArray is too big to post here this is the formate
D/TESTING: org.json.JSONException: Value {"total": 44760,
"total_pages": 4476,
"results":[{JSONObjects}]}
If you wish to view the JSONArray here is the link "https://api.unsplash.com/search/photos?query=wood&client_id=ACESS_KEY_REQUIRED"
also I have viewed this question but that is totally different
You can request a key simply by making an account here.
You need to create jsonObject first. You requested for JSONArray but your server response as JSONObject. Try StringRequest for getting the JSONObject.
Try this:
StringRequest stringRequest = new StringRequest(Request.Method.GET,
URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
// Loop through the array elements
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("results");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject js = jsonArray.getJSONObject(i);
Log.d("TESTING", js.getString("id"));
}
p.dismiss();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.d("TESTING",error.getMessage());
}
})
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
Hope this will work.
You are request for json object but request time you call jsonarrayrequest so JsonException is come
JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET,url,
null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("results");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject js = jsonArray.getJSONObject(i);
Log.d("TESTING",js.getString("id"));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: ", error.getMessage());
}
});
My JSON RESULT
This is my JSON output. Here array name not available
[{"item":"WATER"},{"item":"DFG"},{"item":"2InchPipe"},{"item":"5InchPipe"}]
Android Code
But I want to display the item in the android spinner. I was used volley method for getting all item from JSON.
RequestQueue requestQueue=Volley.newRequestQueue(getApplicationContext());
StringRequest stringRequest=new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
String getitem=
try{
JSONObject jsonObject=new JSONObject(response);
JSONArray jsonArray=jsonObject.getJSONArray("*What to do here*");
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject1=jsonArray.getJSONObject(i);
String country=jsonObject1.getString("Item");
CountryName.add(country);
}
spinner.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, CountryName));
}catch (JSONException e){e.printStackTrace();}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
int socketTimeout = 30000;
RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
stringRequest.setRetryPolicy(policy);
requestQueue.add(stringRequest);
I have doubt in this line
JSONArray jsonArray=jsonObject.getJSONArray("*What to do here*");
Finally i got a solution using following code
JsonArrayRequest requestQueue = new JsonArrayRequest(URL,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
String country = obj.getString("item");
CountryName.add(country);
spinner.setAdapter(new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_spinner_dropdown_item, CountryName));
}
catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
}
MySingleton.getmInstance(MainActivity.this).addToRequestQue(requestQueue );
You can direct pass you output in Array:
JSONArray jsonArray=new JSONArray (response);
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject1=jsonArray.getJSONObject(i);
String country=jsonObject1.getString("Item");
CountryName.add(country);
}
I need help in modifying my android studio code for converting Json object to an array. Bellow is the error in my log cat and the actual code.
This is the error message I am getting in the logcat:
04-03 12:01:16.727 19993-19993/com.errandit E/Volley: com.android.volley.ParseError: org.json.JSONException: Value {"data":[{"errand":"Shopping","charges":"500"},{"errand":"House Assistance","charges":"7000"},{"errand":"Pick - Up","charges":"2500"}],"success":1,"message":" 0 records found"} of type org.json.JSONObject cannot be converted to JSONArray
**I am trying to fetch the json array from my wamp server using the method below. **
private void getData(){
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading");
progressDialog.show();
final JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
for (int i = 0; i < response.length(); i++) {
try {
JSONObject jsonObject = response.getJSONObject(i);
Service service = new Service();
service.setName(jsonObject.getString("errand"));
service.setCharges(jsonObject.getInt("charges"));
serviceList.add(service);
} catch (JSONException e) {
e.printStackTrace();
progressDialog.dismiss();
}
}
adapter.notifyDataSetChanged();
progressDialog.dismiss();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley",error.toString());
progressDialog.dismiss();
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsonArrayRequest);
}
Change like below as You are getting JSONObject and inside it there is JSONArray named "data".
JsonObjectRequest jsonObjRequest = new JsonObjectRequest
(Request.Method.POST, url, jsonObj, new Response.Listener<JSONObject>()
{
#Override
public void onResponse(JSONObject mResponse)
{
JSONArray response=mResponse.optJSONArray("data")
for (int i = 0; i < response.length(); i++) {
try {
JSONObject jsonObject = response.getJSONObject(i);
Service service = new Service();
service.setName(jsonObject.getString("errand"));
service.setCharges(jsonObject.getInt("charges"));
serviceList.add(service);
} catch (JSONException e) {
e.printStackTrace();
}
}
adapter.notifyDataSetChanged();
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error)
{
Toast.makeText(getApplicationContext(), error.toString(), Toast.LENGTH_SHORT).show();
}
});
// Add the request to the RequestQueue.
queue.add(jsonObjRequest);
I want to parse two api at the same time in which one api get a response of key that key has api link and pass in another StringRequest forget response.
This is my function for parsing in which I want to parse firstly one api and get a response in response href name of key use for another api parse link.
please help me as soon as.
I searched and I got this link but it is not proper code.
https://www.versti.eu/TranslateProxy/https/stackoverflow.com/questions/37584001/how-to-combine-the-two-request-url-from-json-to-get-output-in-volley
private void parseSmartPhone()
{
StringRequest stringRequest= new
StringRequest(com.android.volley.Request.Method.GET,
Config.HOMECTEGORY, new Response.Listener<String>() {
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onResponse(String response) {
try {
//getting the whole json Array from the response
// JSONObject jsonObject= new JSONObject(response);
JSONArray jsonArray = new JSONArray(response);
mylist=new ArrayList<>();
for (int i = 0;i<=2;i++)
{
latestsphone= new LatestSmartPhoneModel();
JSONObject jsonObject = jsonArray.getJSONObject(i);
JSONObject objtitle=jsonObject.getJSONObject("title");
title=objtitle.getString("rendered");
objtitle=jsonObject.getJSONObject("_links");
JSONArray imgJsonArray=objtitle.getJSONArray("wp:featuredmedia");
JSONObject objJsonImg=imgJsonArray.getJSONObject(0);
StringRequest request1= new StringRequest(com.android.volley.Request.Method.GET,objJsonImg.getString("href"), new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jsonObject= new JSONObject(response);
JSONObject imggild=jsonObject.getJSONObject("guid");
String rendered=imggild.getString("rendered");
latestsphone.setLink(rendered);
latestsphone.setTitle(title);
mylist.add(latestsphone);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue= Volley.newRequestQueue(getActivity());
requestQueue.add(request1);
request1.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
UpcomingAdapter imgAdapter=new UpcomingAdapter(getActivity(),mylist);
recyclerUpcoming.setAdapter(imgAdapter);
recyclerUpcoming.setLayoutManager(new GridLayoutManager(getActivity(),2));
recyclerUpcoming.setHasFixedSize(true);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(stringRequest);
stringRequest.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
This is your proper code, i corrected your posted code, Use these as global parameter.
ArrayList<LatestSmartPhoneModel> mylist = new ArrayList<>();
String title,link;
private void parseSmartPhone() {
final RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
StringRequest stringRequest = new StringRequest(com.android.volley.Request.Method.GET, Config.HOMECTEGORY, new Response.Listener<String>() {
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onResponse(String response) {
try {
//getting the whole json Array from the response
// JSONObject jsonObject= new JSONObject(response);
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= 3; i++) {
if (i==3)
{
i=4;
}
JSONObject jsonObject = jsonArray.getJSONObject(i);
JSONObject objtitle = jsonObject.getJSONObject("title");
title = objtitle.getString("rendered");
link=jsonObject.getString("link");
objtitle = jsonObject.getJSONObject("_links");
final LatestSmartPhoneModel latestsphone = new LatestSmartPhoneModel();
latestsphone.setTitle(title);
latestsphone.setLink(link);
JSONArray imgJsonArray = objtitle.getJSONArray("wp:featuredmedia");
JSONObject objJsonImg = imgJsonArray.getJSONObject(0);
StringRequest request1 = new StringRequest(com.android.volley.Request.Method.GET, objJsonImg.getString("href"), new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
JSONObject imggild = jsonObject.getJSONObject("guid");
String rendered = imggild.getString("rendered");
latestsphone.set_links(rendered);
mylist.add(latestsphone);
UpcomingAdapter imgAdapter = new UpcomingAdapter(getActivity(), mylist);
recyclerUpcoming.setAdapter(imgAdapter);
recyclerUpcoming.setLayoutManager(new GridLayoutManager(getActivity(), 2));
recyclerUpcoming.setHasFixedSize(true);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue.add(request1);
request1.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue.add(stringRequest);
stringRequest.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}