I'm building a Bank app and want to show history for transactions on the account, When I save the time to Firestore its format as a timestamp, but when I try to display it in my RecyclerView its just seconds and nanoseconds.
How can I show the date and time?
My recyclerView method:
private void setUpRecyclerView() {
String userId = FirebaseAuth.getInstance().getCurrentUser().getUid();
CollectionReference accountTransRef = db.collection(userId).document("accounts")
.collection("accounts").document(accountID).collection("transactions");
Query query = accountTransRef.orderBy("tTimestamp",Query.Direction.DESCENDING);
FirestoreRecyclerOptions<AccountTransactionModel> options = new FirestoreRecyclerOptions.Builder<AccountTransactionModel>()
.setQuery(query, AccountTransactionModel.class)
.build();
adapter = new AccountTransferAdapter(options);
RecyclerView recyclerView = findViewById(R.id.rwTransactionList);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
}
My Model for Transactions
public class AccountTransactionModel {
private String tType,tAccountToId, tDocumentId;
private Timestamp tTimestamp;
private double tAmount;
public AccountTransactionModel() {
}
public AccountTransactionModel(String tType, String tAccountToId, String tDocumentId, Timestamp tTimestamp, double tAmount) {
this.tType = tType;
this.tAccountToId = tAccountToId;
this.tDocumentId = tDocumentId;
this.tTimestamp = tTimestamp;
this.tAmount = tAmount;
}
public String gettType() {
return tType;
}
public String gettAccountToId() {
return tAccountToId;
}
#Exclude
public String gettDocumentId() {
return tDocumentId;
}
public void settDocumentId(String tDocumentId) {
this.tDocumentId = tDocumentId;
}
public Timestamp gettTimestamp() {
return tTimestamp;
}
public double gettAmount() {
return tAmount;
}
}
My adapter
public class AccountTransferAdapter extends FirestoreRecyclerAdapter<AccountTransactionModel, AccountTransferAdapter.TransferHolder > {
public AccountTransferAdapter(#NonNull FirestoreRecyclerOptions<AccountTransactionModel> options) {
super(options);
}
#Override
protected void onBindViewHolder(#NonNull TransferHolder holder, int position, #NonNull AccountTransactionModel model) {
holder.tvTransListAmount.setText(Double.toString(model.gettAmount()));
holder.tvTransListType.setText(model.gettType());
holder.tvTransListTime.setText(model.gettTimestamp().toString());
}
#NonNull
#Override
public TransferHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.transactions_list,viewGroup,false);
return new TransferHolder(v);
}
class TransferHolder extends RecyclerView.ViewHolder{
TextView tvTransListAmount;
TextView tvTransListTime;
TextView tvTransListType;
public TransferHolder(#NonNull View itemView) {
super(itemView);
tvTransListAmount = itemView.findViewById(R.id.trans_list_amount);
tvTransListTime = itemView.findViewById(R.id.trans_list_time);
tvTransListType = itemView.findViewById(R.id.trans_list_type);
//tvAccName = itemView.findViewById(R.id.tvAccountName);
//tvAccBalance = itemView.findViewById(R.id.tvAccountBalance);
}
}
}
What is displayed in my View,App and Firestore:
Timestamp(seconds=1558437203,nanoseconds=72000000)
If Timestamp is firebase package, then you can go with Timestamp#toDate() function
model.gettTimestamp().toDate().toString() which should give you whole date
Change this:
holder.tvTransListTime.setText(model.gettTimestamp().toString());
into this:
holder.tvTransListTime.setText(model.gettTimestamp().toDate());
From the docs:
public Date toDate ()
Returns a new Date corresponding to this timestamp.
Related
I have been able to use this library (SimpleRecyclerview) to section my real-time data from Firebase Firestore inside my recyclerview. It works as expected, but I haven't gotten it to update the recyclerview in real-time as the data changes inside the Firestore database. I can achieve this using a normal recyclerview but I need the data to be sectioned, hence the library. I checked this and this on stackoverflow but none of the posts address sectioning real-time data that is constantly changing.
Here are my codes:
My simple cell class -
public class UpcomingCell extends SimpleCell<MatchModel, UpcomingCell.ViewHolder>{
public UpcomingCell(#NonNull MatchModel item) {
super(item);
}
#Override
protected int getLayoutRes() {
return R.layout.item_livescore;
}
#NonNull
#Override
protected UpcomingCell.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, #NonNull View cellView) {
return new UpcomingCell.ViewHolder(cellView);
}
#Override
protected void onBindViewHolder(#NonNull UpcomingCell.ViewHolder holder, int position, #NonNull Context context, Object payload) {
holder.visitorTeamName.setText(getItem().getVisitorTeam());
...
...
...
}
public class ViewHolder extends SimpleViewHolder {
TextView liveTextView;
public ViewHolder(#NonNull View itemView) {
super(itemView);
liveTextView = itemView.findViewById(R.id.liveTextView);
...
...
...
}
}
}
Recycler Header method -
public void addRecyclerHeaders(){
SectionHeaderProvider<MatchModel> sectionHeaderProvider = new SimpleSectionHeaderProvider<MatchModel>() {
#NonNull
#Override
public View getSectionHeaderView(#NonNull MatchModel item, int position) {
View view = LayoutInflater.from(getActivity().getApplicationContext()).inflate(R.layout.item_group_header,null,false);
TextView headerTitle = view.findViewById(R.id.headerTitle);
TextView headerCountry = view.findViewById(R.id.headerCountry);
ImageView leagueLogo = view.findViewById(R.id.leagueImage);
headerCountry.setText(item.getGroupCountry());
headerTitle.setText(item.getGroupTitle());
return view;
}
#Override
public boolean isSameSection(#NonNull MatchModel item, #NonNull MatchModel nextItem) {
return item.getGroupID() == nextItem.getGroupID();
}
#Override
public boolean isSticky() {
return true;
}
};
simpleRecyclerView.setSectionHeader(sectionHeaderProvider);
}
Bind data method -
private void bindData(){
bindStandings = finalData;
Collections.sort(bindStandings, new Comparator<MatchModel>() {
#Override
public int compare(MatchModel o1, MatchModel o2) {
return o1.getGroupID() - o2.getGroupID();
}
});
for (MatchModel matchModel : bindStandings){
UpcomingCell upcomingCell = new UpcomingCell(matchModel);
upcomingCell.setOnCellClickListener(new SimpleCell.OnCellClickListener<MatchModel>() {
#Override
public void onCellClicked(#NonNull MatchModel item) {
}
});
cells.add(upcomingCell);
}
simpleRecyclerView.addCells(cells);
}
And this is the method I use in getting data from Firestore -
private void getAllData(){
standings = new ArrayList<>();
Group groupA = new Group(0, "Premier League", "England", 8);
...
...
...
Date todayDate = Calendar.getInstance().getTime();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String todayString = formatter.format(todayDate);
Query query = firebaseFirestore.collection("fixtures")
.whereEqualTo("real_date", todayString)
.orderBy("league_id")
.orderBy("timestamp");
query.addSnapshotListener(new EventListener<QuerySnapshot>() {
#Override
public void onEvent(#Nullable QuerySnapshot value, #Nullable FirebaseFirestoreException error) {
if(error != null){
noMatchTextView.setVisibility(View.GONE);
}else{
standings.clear();
finalData.clear();
bindStandings.clear();
cells = new ArrayList<>();
for(DocumentChange documentChange : value.getDocumentChanges()){
if(Integer.parseInt(String.valueOf(documentChange.getDocument().get("league_id"))) == 8){
MatchModel plModel = documentChange.getDocument().toObject(MatchModel.class);
plModel.setGroup(groupA);
standings.add(plModel);
}
...
...
...
}
noMatchTextView.setVisibility(View.GONE);
finalData = standings;
bindData();
}
}
});
}
Please can anyone let me know how to use the library to achieve this, or is there a better/easier way to section real-time Firestore data in a recyclerview? Thank you.
I have added data in firebase. All i have to do is get that data in recyclerview. i have done this many type, but this time it is not showing and i don't know the reason because it is not showing in log. Can any one help?
here's my Activity where the RV is located
rvsalonlist is recyclerview
public void firebasedata() {
FirebaseRecyclerOptions<salonList> options =
new FirebaseRecyclerOptions.Builder<salonList>()
.setQuery(FirebaseDatabase.getInstance().getReference().child("salon"), salonList.class)
.build();
adapter = new SalonListAdapter(options);
rvSalonList.setAdapter(adapter);
adapter.startListening();
}
This is the adapter
public class SalonListAdapter extends FirebaseRecyclerAdapter<salonList,SalonListAdapter.myviewholder> {
public SalonListAdapter(#NonNull FirebaseRecyclerOptions<salonList> options) {
super(options);
}
#Override
protected void onBindViewHolder(#NonNull myviewholder holder, int position, #NonNull salonList model) {
holder.tvSalonName.setText(String.valueOf(model.getSalonName()));
holder.tvSalonAddress.setText(String.valueOf(model.getSalonAddresss()));
Glide.with(holder.ivSalonImage.getContext()).load(model.getImageUrl()).into(holder.ivSalonImage);
}
#NonNull
#Override
public myviewholder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_salon,parent,false);
return new myviewholder(view);
}
class myviewholder extends RecyclerView.ViewHolder{
ImageView ivSalonImage;
TextView tvSalonName, tvSalonMobileNumber, tvSalonAddress;
public myviewholder(#NonNull View itemView) {
super(itemView);
ivSalonImage = itemView.findViewById(R.id.ivSalonImage);
tvSalonName = itemView.findViewById(R.id.tvSalonName);
tvSalonMobileNumber = itemView.findViewById(R.id.tvSalonMobileNumber);
tvSalonAddress = itemView.findViewById(R.id.tvSalonAddress);
}
}
}
Heres the model class .
[![public class salonList {
private String imageUrl, salonName, ownerName, salonEmail, salonMobileNumber, salonAddresss, salonOpenTime, salonCloseTime;
public salonList() {
}
public salonList(String imageUrl, String salonName, String ownerName, String salonEmail, String salonMobileNumber, String salonAddresss, String salonOpenTime, String salonCloseTime) {
this.imageUrl = imageUrl;
this.salonName = salonName;
this.ownerName = ownerName;
this.salonEmail = salonEmail;
this.salonMobileNumber = salonMobileNumber;
this.salonAddresss = salonAddresss;
this.salonOpenTime = salonOpenTime;
this.salonCloseTime = salonCloseTime;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
public String getSalonName() {
return salonName;
}
public void setSalonName(String salonName) {
this.salonName = salonName;
}
public String getOwnerName() {
return ownerName;
}
public void setOwnerName(String ownerName) {
this.ownerName = ownerName;
}
public String getSalonEmail() {
return salonEmail;
}
public void setSalonEmail(String salonEmail) {
this.salonEmail = salonEmail;
}
public String getSalonMobileNumber() {
return salonMobileNumber;
}
public void setSalonMobileNumber(String salonMobileNumber) {
this.salonMobileNumber = salonMobileNumber;
}
public String getSalonAddresss() {
return salonAddresss;
}
public void setSalonAddresss(String salonAddresss) {
this.salonAddresss = salonAddresss;
}
public String getSalonOpenTime() {
return salonOpenTime;
}
public void setSalonOpenTime(String salonOpenTime) {
this.salonOpenTime = salonOpenTime;
}
public String getSalonCloseTime() {
return salonCloseTime;
}
public void setSalonCloseTime(String salonCloseTime) {
this.salonCloseTime = salonCloseTime;
}
}
Database Screenshot
your model class variable names and firebase attributes name are not same. use same name in both places.
for example in firebase use salonName instead of name. similarly for other attributes as well
The names have to be identical
For eg, you have ownerName in the class but ownername in the database. Those should all be identical to the ones you have in your class.
I send data from the activity to the cloud firestore and I retrieve it in the second activity in recycler view.
but the data doesn't appear in the second activity.
I used FirestoreRecyclerAdapter and FirestoreOptions.
This is the activity in which I retrieve the data.
public class MyServicesActivity extends AppCompatActivity {
private FirestoreRecyclerAdapter adapter;
private RecyclerView recyclerView;
private FirebaseFirestore db;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_services);
db = FirebaseFirestore.getInstance();
Query query = db.collection("Services Requested");
recyclerView = findViewById(R.id.rv_my_services);
FirestoreRecyclerOptions<ServiceModel> response = new FirestoreRecyclerOptions
.Builder<ServiceModel>()
.setQuery(query, ServiceModel.class)
.build();
adapter = new FirestoreRecyclerAdapter<ServiceModel, ServiceHolder>(response) {
#NonNull
#Override
public ServiceHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.service_design, parent, false);
return new ServiceHolder(v);
}
#SuppressLint("SetTextI18n")
#Override
protected void onBindViewHolder(#NonNull ServiceHolder holder, int position, #NonNull ServiceModel model) {
holder.serviceImage.setImageResource(model.getServiceImage());
Log.d("DATA", "data isn't null" + position);
holder.serviceName.setText(model.getServiceName());
holder.servicePrice.setText(model.getPrice() + "" + " L.E");
}
};
recyclerView.setAdapter(adapter);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
}
public class ServiceHolder extends RecyclerView.ViewHolder {
private ImageView serviceImage;
private TextView serviceName, servicePrice;
public ServiceHolder(#NonNull View itemView) {
super(itemView);
serviceImage = itemView.findViewById(R.id.polish_img);
serviceName = itemView.findViewById(R.id.polish_txt);
servicePrice = itemView.findViewById(R.id.price_txt);
}
}
#Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
adapter.startListening();
}
}
This is the class model for retrieve data from cloud firestore
public class ServiceModel {
private String serviceName;
private int price;
private int serviceImage;
public ServiceModel(){}
public ServiceModel(String serviceName, int price, int serviceImage) {
this.serviceName = serviceName;
this.price = price;
this.serviceImage = serviceImage;
}
public void setServiceName(String serviceName) {
this.serviceName = serviceName;
}
public void setPrice(int price) {
this.price = price;
}
public void setServiceImage(int serviceImage) {
this.serviceImage = serviceImage;
}
public String getServiceName() {
return serviceName;
}
public int getPrice() {
return price;
}
public int getServiceImage() {
return serviceImage;
}
}
I see in your screenshot, that the name of the properties in the database are stored using whitespace between the words, and each word is starting with a capital letter, while in your class, there is no whitespace and the first word starts with a lower-case and the second with a capital letter. When you are using a public getter called getServiceName(), Firebase is looking in the database after a property called serviceName, which actually does not exist.
To solve this, you either change the properties in your database to match the one in the class, remove the actual data, and add a fresh one, or you can use an annotation called PropertyName in front of the getter, to match the actual naming.
I have a problem with retrieving specific data from Firebase Realtime Database. My problem is that I want to display in RecyclerView just the materials that has the Course_ID (as you can see in the image below) equals to the Course_ID (see Course -> Teacher-Courses in Firebase). How can I accomplish that thing? I will attach the code used in the RecyclerView and the class that contains the model.
As a mention: 1.I have tried to add all the course id's from Firebase and store them to a List, but the app doesn't show anything and 2. In another class I have an Intent that sends me here and also send a extra String with Course_ID that I have accesed.
I am waiting for your responses. Thank you!
FileMaterial.class
public class FileMaterial {
private String Course_ID;
private String Denumire_material;
private String Locatie_material;
private String Teacher_ID;
public FileMaterial() {
}
public FileMaterial(String course_ID, String denumire_material, String locatie_material, String teacher_ID) {
Course_ID = course_ID;
Denumire_material = denumire_material;
Locatie_material = locatie_material;
Teacher_ID = teacher_ID;
}
public String getCourse_ID() {
return Course_ID;
}
public void setCourse_ID(String course_ID) {
Course_ID = course_ID;
}
public String getDenumire_material() {
return Denumire_material;
}
public void setDenumire_material(String denumire_material) {
Denumire_material = denumire_material;
}
public String getLocatie_material() {
return Locatie_material;
}
public void setLocatie_material(String locatie_material) {
Locatie_material = locatie_material;
}
public String getTeacher_ID() {
return Teacher_ID;
}
public void setTeacher_ID(String teacher_ID) {
Teacher_ID = teacher_ID;
}
CourseMaterial.class
public class CourseMaterial extends AppCompatActivity {
private RecyclerView recyclerView;
private DatabaseReference reference, userReference;
private FirebaseAuth mAuth;
FirebaseRecyclerOptions<FileMaterial> options;
FirebaseRecyclerAdapter<FileMaterial, CourseMaterial.FileViewHolder> adapter;
ImageView btnAddMaterial;
ImageView deleteMaterial;
StorageReference storageReference;
FirebaseStorage firebaseStorage;
String urlReference;
String value;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_course_material);
value = getIntent().getStringExtra("course id").toString();
mAuth = FirebaseAuth.getInstance();
reference = FirebaseDatabase.getInstance().getReference().child("Materials").child(mAuth.getCurrentUser().getUid());
recyclerView = findViewById(R.id.recyclerView_fileMaterials);
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
btnAddMaterial = findViewById(R.id.addMaterials);
btnAddMaterial.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(CourseMaterial.this, UploadFile.class));
}
});
}
#Override
public void onStart() {
super.onStart();
options = new FirebaseRecyclerOptions.Builder<FileMaterial>().setQuery(reference, FileMaterial.class).build();
adapter = new FirebaseRecyclerAdapter<FileMaterial, FileViewHolder>(options) {
#Override
protected void onBindViewHolder(#NonNull final FileViewHolder fileViewHolder, int i, #NonNull final FileMaterial fileMaterial) {
fileViewHolder.denumire_material.setText(fileMaterial.getDenumire_material());
}
#NonNull
#Override
public FileViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.youtube_view,parent, false);
FileViewHolder fileViewHolder = new FileViewHolder(v);
return fileViewHolder;
}
};
adapter.startListening();
recyclerView.setAdapter(adapter);
}
public static class FileViewHolder extends RecyclerView.ViewHolder{
TextView denumire_material, dataMaterial;
ImageView deleteMaterial;
public FileViewHolder(#NonNull View itemView) {
super(itemView);
denumire_material = itemView.findViewById(R.id.txtDenMaterial);
deleteMaterial = itemView.findViewById(R.id.imgDeleteMaterial);
}
}
Maybe make a query and pass it to the options of the adapter:
#Override
public void onStart() {
super.onStart();
Query query = reference.orderByChild("Course_ID").equalTo(value);
options = new FirebaseRecyclerOptions.Builder<FileMaterial>().setQuery(query, FileMaterial.class).build();
.......
.......
.......
I am using recyclerView and Adapter to fetch the data in profileActivity
here is my
public class studentDetailsRecyclerActivity extends AppCompatActivity {
//recyclerview to set the details for UI in the student profile activity
private RecyclerView mRecyclerView;
private storeDetailsAdapter mStoreDetailsAdapter;
private List<storeStudentDetails> studentDetailsList;
private FirebaseFirestore dbReference;
private ProgressBar mProgressBar;
private String TAG = studentDetailsRecyclerActivity.class.getSimpleName();
#Override
protected void onCreate(Bundle savedInstanceState) {
dbReference = FirebaseFirestore.getInstance();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recycler_details);
mProgressBar = findViewById(R.id.progressbar);
mRecyclerView = (RecyclerView)findViewById(R.id.recyclerView_products);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
studentDetailsList = new ArrayList<>();
mStoreDetailsAdapter = new storeDetailsAdapter(this,studentDetailsList);
mRecyclerView.setAdapter(mStoreDetailsAdapter);
//to get the "details" this is our collection from firestore so we must fetch them
//by calling the addOnSuccessListener
dbReference.collection("details").get()
.addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
#Override
public void onSuccess(QuerySnapshot queryDocumentSnapshots) { //we must have to hide the progress bar when the data gets loaded
//here queryDocumentsSnapshot will hold all the "details" which is your collection in firestore
if(!queryDocumentSnapshots.isEmpty()){
//we must have to create empty list so that to store all
//details from DocumentsSnapshots
List<DocumentSnapshot> list = queryDocumentSnapshots.getDocuments();
//enhanced for loop because we have to give every index documentSnapShot
for(DocumentSnapshot d: list){
storeStudentDetails sd = d.toObject(storeStudentDetails.class);
studentDetailsList.add(sd);
Log.d(TAG, "onSuccess: " + sd.toString());
}
//to refresh and sync we must have to use notifyDataSetChanged
mStoreDetailsAdapter.notifyDataSetChanged();
}
}
}) .addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(getApplicationContext(), "Error getting data!!!", Toast.LENGTH_LONG).show();
}
});
}
}
and here is my storeDetailsAdapter
import java.util.List;
public class storeDetailsAdapter extends RecyclerView.Adapter<storeDetailsAdapter.StudentViewHolder>{
private Context context;
private List<storeStudentDetails> studentDetailsList;
public storeDetailsAdapter(Context context, List<storeStudentDetails> studentDetailsList) {
this.context = context;
this.studentDetailsList = studentDetailsList;
}
#NonNull
#Override
public StudentViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new StudentViewHolder(
LayoutInflater.from(context).inflate(R.layout.profile_activity, parent, false)
);
}
#Override
public void onBindViewHolder(#NonNull StudentViewHolder holder, int position) {
storeStudentDetails mStoreDetails = studentDetailsList.get(position);
holder.studName.setText(mStoreDetails.getStudentName());
holder.rollNum.setText(mStoreDetails.getRollNo());
holder.bookName.setText( mStoreDetails.getBook());
holder.fine.setText("Fine:" + mStoreDetails.getFine());
holder.dept.setText(mStoreDetails.getDept());
}
#Override
public int getItemCount() {
return studentDetailsList.size();
}
class StudentViewHolder extends RecyclerView.ViewHolder {
TextView studName,rollNum,bookName,dept,fine;
public StudentViewHolder(View itemView) {
super(itemView);
studName=itemView.findViewById(R.id.studentName_prof);
rollNum = itemView.findViewById(R.id.rollNumber_prof);
bookName = itemView.findViewById(R.id.bookName_prof);
fine = itemView.findViewById(R.id.fineAmt_prof);
dept = itemView.findViewById(R.id.department_prof);
}
}
}
and here is my StoreStudentDetails class:
public class storeStudentDetails implements Serializable {
private String studentName;
private String rollNo;
private String book;
private Double fine;
private String dept;
#Exclude private String id;
public storeStudentDetails() {
}
public storeStudentDetails(String studentName, String rollNo,String book, double fine ,String dept) {
this.studentName = studentName;
this.rollNo = rollNo;
this.book = book;
this.fine = fine;
this.dept = dept;
}
public void setId(String id) {
this.id = id;
}
public String getStudentName() {
return studentName;
}
public String getRollNo() {
return rollNo;
}
public String getBook() {
return book;
}
public Double getFine() {
return fine;
}
public String getDept() {
return dept;
}
public String getId() {
return id;
}
}
To solve this, please move the following lines of code:
mStoreDetailsAdapter = new storeDetailsAdapter(this,studentDetailsList);
mRecyclerView.setAdapter(mStoreDetailsAdapter);
Right before the following line of code:
mStoreDetailsAdapter.notifyDataSetChanged();
And this is because onSuccess() method has an asynchronous behavior and by the time you are setting the adapter outside the callback your list is empty.
As you can see, the easiest solution for this problem is to move those lines of code inside the callback. but if you want to use the value of your studentDetailsList outside the onSuccess() method, I recommend you see the last part of my anwser from this post in which I have explained how it can be done using a custom callback. You can also take a look at this video for a better understanding.