Endless RecyclerView - progress bar are not disappearing

Endless RecyclerView - progress bar are not disappearing - android

I am using a RecyclerView and fetching objects from an API in batches of ten. For pagination, I use EndlessRecyclerOnScrollListener and following this tutorial Endless RecyclerView. My problem: on scrolling programm adding progress bar and delete it after data from server fetched. But in my case it doesn't work. ProgressBar still downloading
Method that fetched data
private void makeJsonObjectRequest(int startList,int endList,final JsonObjectListener listener) {
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
i = startLsit;
while(i < endList) {
try {
JSONObject obj = response.getJSONObject(i);
Movie movie = new Movie();
/***** TONS OF CODE *****/
movieList.add(movie);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
i++;
lastNumber = i;
}
mAdapter.notifyDataSetChanged();
listener.onDone(lastNumber);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
}
});
AppController.getInstance().addToRequestQueue(movieReq);
}
Place where I use method:
makeJsonObjectRequest(0, 9, new JsonObjectListener() {
#Override
public void onDone(int lastNumberI) {
lastNumber = lastNumberI;
}
#Override
public void onError(String error) {
}
}); }
mAdapter = new RVAdapter(getContext(),movieList,this,mRecyclerView);
mAdapter.setClickListener(this);
mRecyclerView.setAdapter(mAdapter);
mAdapter.setOnLoadMoreListener(new OnLoadMoreListener() {
#Override
public void onLoadMore() {
movieList.add(null);
mAdapter.notifyItemInserted(movieList.size()-1);
handler.postDelayed(new Runnable() {
#Override
public void run() {
// remove progress item
movieList.remove(movieList.size()-1);
mAdapter.notifyItemRemoved(movieList.size());
//add items one by one
int start = lastNumber;
int end = start + 9;
makeJsonObjectRequest(start, end, new JsonObjectListener() {
#Override
public void onDone(int lastNumberI) {
lastNumber = lastNumberI;
}
#Override
public void onError(String error) {
}
});
mAdapter.setLoaded();
}
}, 2000);
}
});
My adapter like this Endless RecyclerView

After getting response, you have to remove that null movie object and notify the adapter
private void makeJsonObjectRequest(int startList,int endList,final JsonObjectListener listener) {
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
movieList.remove(movieList.size()-1);
mAdapter.notifyItemRemoved(movieList.size());
i = startLsit;
while(i < endList) {
try {
JSONObject obj = response.getJSONObject(i);
Movie movie = new Movie();
/***** TONS OF CODE *****/
movieList.add(movie);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
i++;
lastNumber = i;
}
mAdapter.notifyDataSetChanged();
listener.onDone(lastNumber);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
}
});
AppController.getInstance().addToRequestQueue(movieReq);
}

Related

recycler not show any data until open keyboard device

i have recyclerview and get information from webservice.
public void Load() {
counter = 0;
adapterComment = new AdapterComment(G.context, comments);
mRecyclerView.setAdapter(adapterComment);
VolleyRequestHelper volleyRequestHelper = new VolleyRequestHelper(Request.Method.POST, G.URL_ADDRESS_MUSIC + "get_song_comment/page/" + counter, map, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//get data
}
adapterComment.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
Volley.newRequestQueue(G.context).add(volleyRequestHelper);
}
and i use the endless scroll every time recycler show 20 item , if data bigger not problem if data smaller 20 recycler not show data until open keyboard device (i have edittext in layer) .
public void LoadMore() {
counter = (counter + 1);
adapterComment = new AdapterComment(G.context, comments);
mRecyclerView.setAdapter(adapterComment);
VolleyRequestHelper volleyRequestHelper = new VolleyRequestHelper(Request.Method.POST, G.URL_ADDRESS_MUSIC + "get_song_comment/page/" + counter, map, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//get data
}
adapterComment.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
Volley.newRequestQueue(G.context).add(volleyRequestHelper);
}
and in onCreatView :
Load();
mRecyclerView.addOnScrollListener(new EndlessRecyclerOnScrollListener(linearLayoutManager) {
#Override
public void onLoadMore(int current_page) {
int lastFirstVisiblePosition = ((LinearLayoutManager) mRecyclerView.getLayoutManager()).findFirstVisibleItemPosition();
((LinearLayoutManager) mRecyclerView.getLayoutManager()).scrollToPosition(lastFirstVisiblePosition);
LoadMore();
}
});

Observable gives me size of a List null in onComplete()

I need to save in Realm a JSON that I've saved in Assets folder.
So I've decided to do it in this way:
private void putCountryIntoRealm()
{
Observable.create(new Observable.OnSubscribe<String>()
{
public void call(Subscriber<? super String> subscriber)
{
try
{
InputStream is = getActivity().getAssets().open("countries.json");
Reader inRead = new InputStreamReader(is);
Gson gson = new Gson();
JsonReader reader = new JsonReader(inRead);
reader.setLenient(true);
reader.beginArray();
while (reader.hasNext())
{
CountryObject ct = gson.fromJson(reader, CountryObject.class);
country.add(ct);
System.out.println("size ct: "+country.size());
subscriber.onNext(reader.toString());
}
reader.endArray();
reader.close();
subscriber.onCompleted();
}
catch (IOException e)
{
subscriber.onError(e);
}
}
}).subscribeOn(Schedulers.newThread())
.subscribe(new Subscriber<String>()
{
#Override
public void onCompleted()
{
getActivity().runOnUiThread(new Runnable()
{
#Override
public void run()
{
realm.executeTransactionAsync(new Realm.Transaction()
{
float total = 0;
float size = country.size();
String progressCount;
public void execute(Realm mRealm)
{
Countries countries = new Countries();
int i;
System.out.print("countries size: "+size);
for (i = 0; i < country.size(); i++)
{
total = (i/size * 100);
progressCount = String.format("%.0f",total);
countries.setId(country.get(i).getId());
countries.setCode(country.get(i).getCode());
countries.setName(country.get(i).getName());
countries.setContinent(country.get(i).getContinent());
countries.setKeywords(country.get(i).getKeywords());
countries.setWikipedia_link(country.get(i).getWikiLink());
mRealm.insertOrUpdate(countries);
getActivity().runOnUiThread(new Runnable()
{
#Override
public void run()
{
//Log.d("%",progressCount);
dialog = new ProgressDialog(getActivity());
dialog.setTitle("Salvataggio country in corso");
dialog.setMessage(progressCount+"%");
}
});
}
}
},new Realm.Transaction.OnSuccess() {
#Override
public void onSuccess()
{
Log.wtf("va","Ok");
if(dialog.isShowing())
dialog.dismiss();
}
}, new Realm.Transaction.OnError()
{
#Override
public void onError(Throwable error)
{
error.printStackTrace();
}
});
}
});
}
#Override
public void onError(Throwable e)
{
e.printStackTrace();
}
#Override
public void onNext(String s)
{
System.out.println(s);
}
});
}
but I have this error:
W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'long com.plenitudesrls.aviocalc.helpful.CountryObject.getId()' on a null object reference
In fact, I print logs and the size in onNext() is 245, in onCompleted() is null.
Why I have this error? I have another case where this works good.
Thanks
EDIT: it works good, the problem was a MalformedJson that cause the crash

Items Update on second click

I am working on a project in which we enter an email and that is checked with the emails present in different tables of the database. Depending upon tables in which the entered email is present I want to display a list of check boxes in a dialog box on clicking a button. My problem is the names of check boxes get updated only on the second click and on further clicks the order of names change. I am not able to figure out this and spent many hours in same. Please help!
MainActivity.java
public class MainActivity extends AppCompatActivity {
public EditText et;
public Main2Activity act;
private String s;
private String[] st = {"","",""};
private int i,j;
private Boolean x;
private String url1 = "http://192.168.56.1:80/axis/results.json";
private String url2 = "http://192.168.56.1:80/hdfc/results.json";
private String url3 = "http://192.168.56.1:80/sbi/results.json";
private ProgressDialog pDialog;
private static String TAG = MainActivity.class.getSimpleName();
private String[] items= {"","",""};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//mail entered into the edittext
et = (EditText)findViewById(R.id.editText);
j=0;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
// on click
public void makeJsonArrayRequest(View view) {
j=0;
s=et.getText().toString();//email to string
JsonArrayRequest req1 = new JsonArrayRequest(url1,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response.get(i);
String email = person.getString("email");
if(email.equals(s)){
System.out.println("Axis");
//if present in the table add to list
addItem("AXIS");
}
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
JsonArrayRequest req2 = new JsonArrayRequest(url2,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response.get(i);
String email = person.getString("email");
if(email.equals(s)) {
System.out.println("HDFC");
addItem("HDFC");
}
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
JsonArrayRequest req3 = new JsonArrayRequest(url3,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response.get(i);
String email = person.getString("email");
if(email.equals(s)){
System.out.println("SBI");
addItem("SBI");}
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
AppController.getInstance().addToRequestQueue(req1);
AppController.getInstance().addToRequestQueue(req2);
AppController.getInstance().addToRequestQueue(req3);
dialogadd();
}
public void addItem(String s)
{
items[j]=s;
j++;
}
public void dialogadd()
{
Dialog dialog;
final ArrayList itemsSelected = new ArrayList();
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select banks you want to connect to: ");
builder.setMultiChoiceItems(items, null,
new DialogInterface.OnMultiChoiceClickListener() {
#Override
public void onClick(DialogInterface dialog, int selectedItemId,
boolean isSelected) {
if (isSelected) {
itemsSelected.add(selectedItemId);
} else if (itemsSelected.contains(selectedItemId)) {
itemsSelected.remove(Integer.valueOf(selectedItemId));
}
}
})
.setPositiveButton("Done!", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
//Your logic when OK button is clicked
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
}
});
dialog = builder.create();
dialog.show();}
}
here is the log cat
logcat
on first click
on second click
on third click

AppController.getInstance().addToRequestQueue(req1); // this will take some time get data
AppController.getInstance().addToRequestQueue(req2); // even this will take some time get data
AppController.getInstance().addToRequestQueue(req3); //last this also will take some time get data
dialogadd(); // but this is an instant call. which will show the dialog, since previous all three call are pending your data get shown unless they complete.
solution : use below call to show the dialog
JsonArrayRequest req3 = new JsonArrayRequest(url3,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response.get(i);
String email = person.getString("email");
if(email.equals(s)){
System.out.println("SBI");
addItem("SBI");}
// use this last call show dialog
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
Advice
use Future request in volley, i think wt you need is synchronous call one after another

Listview not updated in android after spinner selection

hello guys i am working an app where i want to update my listview but everything is working perfect only list view is not updated i don't understand where i am doing wrong help me
code is
public class MainActivity extends AppCompatActivity implements Spinner.OnItemSelectedListener{
private Spinner spinner;
private ArrayList<String> students;
private JSONArray result;
CallbackManager callbackManager;
ShareDialog shareDialog;
// listveiw data
private static final String TAG = MainActivity.class.getSimpleName();
String url = "http://www.example.com/json/json.php";
private ProgressDialog pDialog;
private List<Model> movieList = new ArrayList<Model>();
private ListView listView;
private CustomListAdapter adapter;
final Model model = new Model();
final Json_Data j_data = new Json_Data();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.activity_main);
callbackManager = CallbackManager.Factory.create();
students = new ArrayList<String>();
spinner = (Spinner) findViewById(R.id.txtSpinner);
listView = (ListView) findViewById(R.id.list);
spinner.setOnItemSelectedListener(this);
getData();
listdata();
adapter = new CustomListAdapter(this, movieList);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
final TextView tv_id = (TextView) view.findViewById(R.id.title);
String txt = tv_id.getText().toString();
model.setItemText(txt);
Log.e(TAG, "====>" + txt);
_Dialog_Custom();
}
});
pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
pDialog.show();
}
public void listdata(){
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
hidePDialog();
Log.e(TAG, response.toString());
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Model model = new Model();
String status = obj.getString("txt");
String cate = obj.getString("category");
model.setList_category(cate);
model.setTitle(status);
movieList.add(model);
} catch (JSONException e) {
e.printStackTrace();
}
}
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
AppController.getInstance().addToRequestQueue(movieReq);
}
private void getData() {
StringRequest stringRequest = new StringRequest(Config.DATA_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
JSONObject j_obj = null;
try {
j_obj = new JSONObject(response);
result = j_obj.getJSONArray(Config.JSON_ARRAY);
//Calling method getStudents to get the students from the JSON Array
getStudents(result);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void getStudents(JSONArray j) {
for (int i = 0; i < j.length(); i++) {
try {
JSONObject json = j.getJSONObject(i);
students.add(json.getString(Config.TAG_USERNAME));
} catch (JSONException e) {
e.printStackTrace();
}
}
//Setting adapter to show the items in the spinner
spinner.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, students));
}
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String text_spinner = spinner.getSelectedItem().toString();
//Log.e("Selected value in","==>"+text_spinner);
j_data.setSpintext(text_spinner);
makeJsonArrayRequest();
Toast.makeText(MainActivity.this, "Get Value from spinner" +text_spinner, Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
private void _Dialog_Custom() {
final Dialog dialog = new Dialog(this);
final String txt1 = model.getItemText().toString();
Log.e("Hello Dialog", ":=>" + txt1);
dialog.setContentView(R.layout.dialogbox);
dialog.setTitle("Share via");
dialog.setCanceledOnTouchOutside(true);
ImageButton _Fb_Sharebtn = (ImageButton) dialog.findViewById(R.id.share_facebook);
_Fb_Sharebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (ShareDialog.canShow(ShareLinkContent.class)) {
// https://developers.facebook.com/docs/sharing/android
ShareLinkContent linkContent = new ShareLinkContent.Builder()
.setContentTitle("Hello Facebook")
.setContentDescription(
"The 'Hello Facebook' sample showcases simple Facebook integration")
.setContentUrl(Uri.parse("http://developers.facebook.com/android"))
.build();
shareDialog.show(linkContent);
}
}
});
ImageButton _Sharebtn_google = (ImageButton) dialog.findViewById(R.id.share_btn_google);
_Sharebtn_google.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent shareIntent = new PlusShare.Builder(MainActivity.this)
.setType("text/plain")
.setText(txt1)
.getIntent();
try {
startActivity(shareIntent);
} catch (ActivityNotFoundException ex) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=com.google.android.apps.plus&hl=en")));
}
}
});
ImageButton whtsapp_sahre = (ImageButton) dialog.findViewById(R.id.whatsapp_btn);
whtsapp_sahre.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent whatsappIntent = new Intent(Intent.ACTION_SEND);
whatsappIntent.setType("text/plain");
whatsappIntent.setPackage("com.whatsapp");
String result = txt1;
whatsappIntent.putExtra(Intent.EXTRA_TEXT, result);
try {
startActivity(whatsappIntent);
} catch (ActivityNotFoundException ex) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=com.whatsapp")));
}
}
});
ImageButton _Twwiterbtn = (ImageButton) dialog.findViewById(R.id.twwiter_btn);
_Twwiterbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_SEND);
String result = txt1;
intent.setType("text/plain")
.setPackage("com.twitter.android");
intent.putExtra(Intent.EXTRA_TEXT, result);
try {
startActivity(intent);
} catch (ActivityNotFoundException ex) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=com.twitter.android&hl=en")));
}
}
});
dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
#Override
public void onCancel(DialogInterface dialog) {
}
});
dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
}
});
dialog.show();
}
protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
#Override
public void onBackPressed() {
super.onBackPressed();
Intent backintent = new Intent(getApplicationContext(), Main_Selected_Activity.class);
startActivity(backintent);
finish();
}
#Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
private void makeJsonArrayRequest() {
String spinner_data =j_data.getSpintext().toString().trim();
Log.e(TAG, spinner_data.toString());
String arrayurl = "http://www.example.com/jsoncategory.php?category="+spinner_data;
Log.e("Link is here","==>"+arrayurl);
ArrayList<String> newdata = new ArrayList<String>();
movieList = new ArrayList<Model>();
JsonArrayRequest movieReq = new JsonArrayRequest(arrayurl,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.e(TAG, "link response=>" + response);
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
String name = obj.getString("txt");
model.setList_category(name);
movieList.add(model);
}catch (JSONException e) {
e.printStackTrace();
Log.e("Hello error","==>"+e);
}
}
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
AppController.getInstance().addToRequestQueue(movieReq);
}
}
please help me

Follow The Below approach
Create a public method in your adapter class:
private List<Model> adapterInitialMovieList = null;
public void setDataOnSpinnerSelected(List<Model> movieList){
adapterInitialMovieList = movieList;
notifyDataSetChanged();
}
In Your Activity Class Inside Spinner onClick method:
if(adapter != null){
adapter.setDataOnSpinnerSelected(yourChangedArrayListOfModelClass);
}

use
movieList.clear();
instead of
movieList = new ArrayList<Model>();
The problem is about the creation of a new arraylist. So, the ArrayAdapter do not 'know' you when you want to create a new one ArrayList (with the different address).
In line
adapter = new CustomListAdapter(this, movieList);
you push a some address of arraylist. In a new line later you generates a new arraylist with the different one and work with it. But the adapter works with the 'old variant' of arraylist.

Remove this line from makeJsonArrayRequest() :
movieList = new ArrayList<Model>();
You are assigning a new object(ArrayList) to the movieList and adding values in the new object instead of the one which you passed to the list adapter. Hence the reference of the object which is being used by the list adapter is lost and when you call adapter.notifyDataSetChanged(); there is no updation as the object which is used by the list adapter is unchanged.

Why is Volley's onResponse not called

I am fetching json data through Volley. The problem I am having
is that Volley's onResponse is never called, and hence the data are not parsed and displayed.
Sample JSON data
{
"title": "This is a sample text title title",
"cat": {
"origin" : "United states",
"target" : "Asia",
},
"content": "Lorem ipsum ipsum trxt hag jlak jshss jsyts pjqgq uuqtyq usiuqjo uwywh",
}
NewsActivity
public class NewsDetails extends AppCompatActivity {
private final String TAG = "NewsDetails";
private ProgressDialog mProgresscircle;
TextView newsTitle, newsOrigin, newsContent;
//private int news_id;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_news_details);
newsTitle = (TextView) findViewById(R.id.dnews_title);
newsOrigin = (TextView) findViewById(R.id.dnews_origin);
newsContent = (TextView) findViewById(R.id.dnews_content);
if (NetworkCheck.isAvailableAndConnected(this)) {
//Calling method to load newss
loadNews();
} else {
final Context context;
context = this;
final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.setTitle(R.string.alert_titl);
alertDialog.setCancelable(false);
alertDialog.setIcon(R.mipmap.ic_launcher);
alertDialog.setMessage(R.string.failed_news);
alertDialog.setPositiveButton(R.string.alert_retry, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (!NetworkCheck.isAvailableAndConnected(context)) {
alertDialog.show();
} else {
loadNews();
}
}
});
alertDialog.setNegativeButton(R.string.alert_cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
alertDialog.show();
}
}
private void loadNews() {
Log.d(TAG, "loadNews called");
mProgresscircle = new ProgressDialog(NewsDetails.this);
mProgresscircle.setCancelable(false);
mProgresscircle.setMessage(null);
mProgresscircle.show();
int news_id = getIntent().getIntExtra("NewsId", -1);
Toast.makeText(NewsDetails.this, "News id is" + news_id, Toast.LENGTH_SHORT).show();
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(DetailConfig.GET_DURL + news_id,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, "onResponse called NewsDetails");
//Dismissing progressbar;
if (mProgresscircle != null) {
mProgresscircle.dismiss();
}
//Calling method to parse json array
parseNews(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to queue
requestQueue.add(djsonArrayRequest);
}
//This method will parse json data of news
private void parseNews(JSONArray jsonArray) {
Log.d(TAG, "Parsing news array");
for (int i = 0; i<jsonArray.length(); i++) {
JSONObject jsonObject = null;
try {
jsonObject = jsonArray.getJSONObject(i);
String title = jsonObject.getString(DetailConfig.TAG_DPOST_TITLE);
newsTitle.setText(title);
JSONObject pOrigin = jsonObject.getJSONObject("cat");
String origin = pOrigin.getString("origin");
newsOrigin.setText(origin);
String content = jsonObject.getString(DetailConfig.TAG_DPOST_CONTENT);
newsContent.setText(content);
} catch (JSONException w) {
w.printStackTrace();
}
}
}
}
The things I know
In logcat, loadNews method is called.
I'm logging Volley, and from logcat volley is not complaining in anyway
I can't see "onResponse called NewsDetails" in logcat, meaning that for some reason not known to me, it's not called
So, my question is why is onResponse not called and how should I fix it?

You should use JsonObjectRequest instead of JsonArrayRequest because you are getting jsonobject in the response.
For getting more knowledge you may go through Volley tutorial

/* you are getting json in response but your response listener method is get Json Array replace your code with below code and also add an debug point in your error listener method */
private void loadNews() {
Log.d(TAG, "loadNews called");
mProgresscircle = new ProgressDialog(NewsDetails.this);
mProgresscircle.setCancelable(false);
mProgresscircle.setMessage(null);
mProgresscircle.show();
int news_id = getIntent().getIntExtra("NewsId", -1);
Toast.makeText(NewsDetails.this, "News id is" + news_id, Toast.LENGTH_SHORT).show();
final JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
DetailConfig.GET_DURL, requestParam,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d("Debug", response.toString());
//TODO parsing code
parseNews(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("", "Error: " + error.getMessage());
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to queue
requestQueue.add(djsonArrayRequest);
}
// or replace this code into your into your loadNews method
final JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
DetailConfig.GET_DURL, requestParam,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d("Debug", response.toString());
//TODO parsing code
parseNews(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("", "Error: " + error.getMessage());
}
});
**
You can also refer below link for complete tutorial http://www.hackpundit.com/android-turorial-json-parse-volley/
**

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