I am accessing data from a 3rd party api. It's giving this response.
This is the 3rd party api
I am unable to get response in the textview.
Please suggest me some solution.
Is this the correct way of writing
e.setText(arg0.get(1).getProductBaseInfo()
.getProductAttributes().getTitle().toString());
{
"productInfoList": [{
"productBaseInfo": {
"productIdentifier": {
"productId": "MOBDP6W6MCUWCFGV",
"categoryPaths": {
"categoryPath": [[{
"title": "Mobiles & Accessories"
},
{
"title": "Mobiles"
}]]
}
},
"productAttributes": {
"title": "Sony Xperia C Black",
}
}]
}
public class productInfoList {
private productBaseInfo productBaseInfo;
private productShippingBaseInfo productShippingBaseInfo;
private String offset;
public productBaseInfo getProductBaseInfo() {
return productBaseInfo;
}
public void setProductBaseInfo(productBaseInfo productBaseInfo) {
this.productBaseInfo = productBaseInfo;
}
public productShippingBaseInfo getProductShippingBaseInfo() {
return productShippingBaseInfo;
}
public void setProductShippingBaseInfo(
productShippingBaseInfo productShippingBaseInfo) {
this.productShippingBaseInfo = productShippingBaseInfo;
}
public String getOffset() {
return offset;
}
public void setOffset(String offset) {
this.offset = offset;
}
}
public class productBaseInfo {
private productIdentifier productIdentifier;
private productAttributes productAttributes;
public productIdentifier getProductIdentifier() {
return productIdentifier;
}
public void setProductIdentifier(productIdentifier productIdentifier) {
this.productIdentifier = productIdentifier;
}
public productAttributes getProductAttributes() {
return productAttributes;
}
public void setProductAttributes(productAttributes productAttributes) {
this.productAttributes = productAttributes;
}
}
public class productAttributes {
private String title;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
public interface Flipkart_Interface {
#Headers({ "Fk-Affiliate-Token:asdf",
"Fk-Affiliate-Id:weforteafsd1g" })
#GET("/search/json?query=sony&resultCount=10")
void search(Callback<List<productInfoList>> callback);
}
public class MainActivity extends ActionBarActivity {
List<productInfoList> flip = new ArrayList<productInfoList>();
TextView e;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
e = (TextView) findViewById(R.id.sear);
String ENDPOINT = "https://affiliate-api.flipkart.net/affiliate";
RestAdapter adapter = new RestAdapter.Builder().setEndpoint(ENDPOINT)
.build();
/*
* productBaseInfo api1 = adapter.create(productBaseInfo.class);
* productInfoList api2 = adapter.create(productInfoList.class);
* productAttributes api3 = adapter.create(productAttributes.class);
*/
Flipkart_Interface api = adapter.create(Flipkart_Interface.class);
api.search(new Callback<List<productInfoList>>() {
#Override
public void success(List<productInfoList> arg0, Response arg1) {
// TODO Auto-generated method stub
e.setText(arg0.get(1).getProductBaseInfo()
.getProductAttributes().getTitle().toString());
}
#Override
public void failure(RetrofitError arg0) {
// TODO Auto-generated method stub
}
});
}
}
I am unable to get response in the textview.
Please suggest me some solution.
Is this the correct way of writing
e.setText(arg0.get(1).getProductBaseInfo()
.getProductAttributes().getTitle().toString());
Looking at the JSON, you have a one element List of productInfoList elements, and you're accessing index 1.
Try accessing index zero, and make sure that your List has data:
#Override
public void success(List<productInfoList> arg0, Response arg1) {
// TODO Auto-generated method stub
Log.d("MyApp", "arg0 size: " + arg0.size());
//make sure the List has data
if (arg0.size() > 0){
//log the value
Log.d("MyApp", "Title Value: " + arg0.get(0).getProductBaseInfo().getProductAttributes().getTitle().toString());
e.setText(arg0.get(0).getProductBaseInfo()
.getProductAttributes().getTitle().toString());
}
}
Related
i know actually a lot of these kinds of questions, and i have searched on google but i can't find where the error is in my code.
I tried to send a request to fetch data, but it runs the onFailure method which reads "NumberFormatException: Empty string" and the data can't be displayed in the recyclerview, even though I'm also getting a json response as I wanted.
i got this response:
{
"kode":1,
"pesan":"Barang ditemukan",
"data":[
{
"Sat_1":"PT",
"Sat_2":"",
"Isi_2":"",
"KdBrg":"280349191",
"NmBrg":"SILICONE PACIFIER STEP 1A",
"Stock_Akhir":"0",
"Hrg":28000
}
]
}
my object model
public class ModelDataBarang {
private int Isi_2;
private int Isi_3;
private int Isi_4;
private String KdBrg;
private String NmBrg;
private String Sat_1;
private String Sat_2;
private String Sat_3;
private String Sat_4;
private String KdHrgList;
private double Stock_Akhir;
private double HrgJl11;
public double getHrgJl11() {
return HrgJl11;
}
public void setHrgJl11(double hrgJl11) {
HrgJl11 = hrgJl11;
}
private String Hrg;
public String getHrg() {
return Hrg;
}
public void setHrg(String hrg) {
Hrg = hrg;
}
public String getKdHrgList() {
return KdHrgList;
}
public void setKdHrgList(String kdHrgList) {
KdHrgList = kdHrgList;
}
public String getSat_3() {
return this.Sat_3;
}
public void setSat_3(String sat_3) {
this.Sat_3 = sat_3;
}
public String getSat_4() {
return this.Sat_4;
}
public void setSat_4(String sat_4) {
this.Sat_4 = sat_4;
}
public int getIsi_3() {
return this.Isi_3;
}
public void setIsi_3(int isi_3) {
this.Isi_3 = isi_3;
}
public int getIsi_4() {
return this.Isi_4;
}
public void setIsi_4(int isi_4) {
this.Isi_4 = isi_4;
}
public String getKdBrg() {
return this.KdBrg;
}
public void setKdBrg(String kdBrg) {
this.KdBrg = kdBrg;
}
public String getNmBrg() {
return this.NmBrg;
}
public void setNmBrg(String nmBrg) {
this.NmBrg = nmBrg;
}
public String getSat_1() {
return this.Sat_1;
}
public void setSat_1(String sat_1) {
this.Sat_1 = sat_1;
}
public String getSat_2() {
return this.Sat_2;
}
public void setSat_2(String sat_2) {
this.Sat_2 = sat_2;
}
public int getIsi_2() {
return this.Isi_2;
}
public void setIsi_2(int isi_2) {
this.Isi_2 = isi_2;
}
public double getStock_Akhir() {
return this.Stock_Akhir;
}
public void setStock_Akhir(double stock_Akhir) {
this.Stock_Akhir = stock_Akhir;
}
public String toString() {
return this.NmBrg;
}
}
my recyclerview data holder
ModelDataBarang modelBarangResto= listModel.get(position);
holder.tvKdBrg.setText(modelBarangResto.getKdBrg());
holder.tvNmBarang.setText(modelBarangResto.getNmBrg());
holder.tvHrgBrg.setText(String.valueOf(modelBarangResto.getHrg()));
all answers i will appreciate
Your model class values are not defined as per your response. Try to check and modify respective return type. You are getting this error because you have defined Isi_2 as int in your model class but in response you are getting empty string.
Replace this
private int Isi_2;
With this
private String Isi_2;
Trying to learn Room and RXJAVA.
I have about 80% of this understood but I'm getting stuck on figuring the rest out.
Here is the error I get on the insert data.
java.lang.NullPointerException: Attempt to invoke interface method
'void
com.example.learnroom.EntityDao.insert(com.example.learnroom.Entitys)'
on a null object reference
If I don't run the try catch I get the following error which seems to be related.
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.example.learnroom/com.example.learnroom.MainActivity}:
java.lang.NullPointerException: Attempt to invoke interface method
'io.reactivex.Maybe
com.example.learnroom.EntityDao.getEntity(java.lang.String)' on a null
object reference
How do I fix this?
I have tried to simplify from the tutorials all over the web most using recyclerviews to just 2 text fields. They say this is 3 pieces but it doesn't seem like it, as the DB was never set up so I ran it in a method to run the code. Maybe someone can help explain to me how this really works.
my code
Dao
public interface EntityDao {
#Query("SELECT * FROM Entitys WHERE ID = :ID LIMIT 1")
Maybe<List<Entitys>> getEntity(String ID);
#Insert(onConflict = OnConflictStrategy.REPLACE)
void insert(Entitys entitys);
#Query("DELETE FROM Entitys")
void deleteAllEntity();
}
Entity
public class Entitys {
#PrimaryKey
#NonNull
public String ID;
public String ts;
public String tss;
public Entitys(#NonNull String ID, String ts, String tss) {
this.ID = ID;
this.ts = ts;
this.tss = tss;
}
public String getTss() {
return tss;
}
public void setTss(String tss) {
this.tss = tss;
}
public void setID(String ID) {
this.ID = ID;
}
public void setTs(String ts) {
this.ts = ts;
}
public String getID() {
return ID;
}
public String getTs() {
return ts;
}
}
database
#Database(entities = {Entitys.class}, version = 1)
public abstract class PathwaysDB extends RoomDatabase {
private static volatile PathwaysDB INSTANCE;
public static EntityDao entityDao() {
return null;
}
public static PathwaysDB getInstance(Context context) {
if (INSTANCE == null) {
synchronized (PathwaysDB.class) {
if (INSTANCE == null) {
INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
PathwaysDB.class, "Pathwaysdb")
.build();
}
}
}
return INSTANCE;
}
}
MainActivity
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = MainActivity.class.getSimpleName();
Button tb;
EditText te, tes;
String ts, tss, ID;
CompositeDisposable compositeDisposable = new CompositeDisposable();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ID ="test";
te = findViewById(R.id.te);
tb = findViewById(R.id.tb);
tb.setOnClickListener(this);
tes = findViewById(R.id.tes);
Builddb();
try{
getData();}catch (Exception e){}
}
private void Builddb() {
Completable.fromAction(() -> PathwaysDB.getInstance(this))
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new CompletableObserver() {
#Override
public void onSubscribe(Disposable d) {
compositeDisposable.add(d);
}
#Override
public void onComplete() {
// action was completed successfully
}
#Override
public void onError(Throwable e) {
// something went wrong
}
});
}
private void getData() {
Maybe<List<Entitys>> single = entityDao().getEntity(ID);
single.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new MaybeObserver<List<Entitys>>() {
#Override
public void onSubscribe(Disposable d) {
// add it to a CompositeDisposable
}
#Override
public void onSuccess(List<Entitys> entity) {
te.setText(entity.indexOf(ts));
tes.setText(entity.indexOf(tss));
}
#Override
public void onError(Throwable e) {
// show an error message
}
#Override
public void onComplete() {
}
});
compositeDisposable.add((Disposable) single);
}
#Override
protected void onDestroy() {
super.onDestroy();
compositeDisposable.dispose();
}
private void updateUserName() {
ts = te.getText().toString();
tss = tes.getText().toString();
Entitys entitys = new Entitys(ID, ts, tss);
Completable.fromAction(() -> entityDao().insert(entitys))
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new CompletableObserver() {
#Override
public void onSubscribe(Disposable d) {
compositeDisposable.add(d);
}
#Override
public void onComplete() {
// action was completed successfully
}
#Override
public void onError(Throwable e) {
// something went wrong
}
});
}
#Override
public void onClick(View view) {
updateUserName();
Intent forward = new Intent(this, secondpage.class);
startActivity(forward);
}
}
Reason for crash is this line in your PathwaysDB class
public static EntityDao entityDao() {
return null;
}
it is returning null. It should be like
public abstract EntityDao entityDao()
You forget to add #Dao annonation to your EntityDao interface class.
also you need to change below method :
public static EntityDao entityDao() {
return null;
}
To
public abstract EntityDao entityDao();
I am using room as data store for my app. I am trying to save a list of sessions from a successful network call in viewmodel class. I have used a repository for interacting with the dao and asynctask for making crud operations async.
Now, I'm trying to display the "saved data" in a recyclerview but it shows nothing. On inspection of my database table, I find that nothing was saved. Here's my model class:
#Entity(tableName = "sessions")
public class Sessions{
// #PrimaryKey(autoGenerate = true)
// public int id;
#SerializedName("prg_session_image")
public String sessionImage;
#SerializedName("prg_session_name")
public String session_name;
#SerializedName("prg_session_id") // used session id as PK
#PrimaryKey
#NonNull
public String prog_sessionId;
#SerializedName("prg_session_description")
public String session_desc;
#SerializedName("reference_id")
public String reference_id;
#SerializedName("prg_name")
public String program_name;
#SerializedName("batch_name")
public String batch_name;
#SerializedName("player_count")
public String participants_count;
#SerializedName("prg_session_focus_points")
public String session_focus_points;
#SerializedName("prg_session_equipment")
public String equipments_reqd;
#SerializedName("session_complete")
public String is_complete;
public Sessions() {
}
// public int getId() {
// return id;
// }
public String getSessionImage() {
return sessionImage;
}
public void setSessionImage(String sessionImage) {
this.sessionImage = sessionImage;
}
public String getSession_name() {
return session_name;
}
public void setSession_name(String session_name) {
this.session_name = session_name;
}
public String getProg_sessionId() {
return prog_sessionId;
}
public void setProg_sessionId(String prog_sessionId) {
this.prog_sessionId = prog_sessionId;
}
public String getSession_desc() {
return session_desc;
}
public void setSession_desc(String session_desc) {
this.session_desc = session_desc;
}
public String getReference_id() {
return reference_id;
}
public void setReference_id(String reference_id) {
this.reference_id = reference_id;
}
public String getProgram_name() {
return program_name;
}
public void setProgram_name(String program_name) {
this.program_name = program_name;
}
public String getBatch_name() {
return batch_name;
}
public void setBatch_name(String batch_name) {
this.batch_name = batch_name;
}
public String getParticipants_count() {
return participants_count;
}
public void setParticipants_count(String participants_count) {
this.participants_count = participants_count;
}
public String getSession_focus_points() {
return session_focus_points;
}
public void setSession_focus_points(String session_focus_points) {
this.session_focus_points = session_focus_points;
}
public String getEquipments_reqd() {
return equipments_reqd;
}
public void setEquipments_reqd(String equipments_reqd) {
this.equipments_reqd = equipments_reqd;
}
public String getIs_complete() {
return is_complete;
}
public void setIs_complete(String is_complete) {
this.is_complete = is_complete;
}
}
And Dao class:
#Dao
public interface SessionsDAO {
// #Insert
// LiveData<List<Sessions>> saveSessions(List<Sessions> sessions);
#Insert
void addSessions(List<Sessions> list);
#Query("select * from sessions")
LiveData<List<Sessions>> getAllSessions();
#Query("select * from sessions where prog_sessionId = :id")
Sessions getSessionById(String id);
}
In repository, I have asynctasks for various operations with the Dao:
public class SessionsRepository {
public SessionsDAO dao;
private MutableLiveData<List<Sessions>> querySingleSession;
private LiveData<List<Sessions>> allSessions;
public SessionsRepository(Application application){
SportsDatabase database = SportsDatabase.getInstance(application);
dao = database.sessionsDAO();
querySingleSession = new MutableLiveData<>();
allSessions = dao.getAllSessions();
}
public void saveSessions(List<Sessions> sessions){
new SaveSessionsTask(dao).execute(sessions);
}
public LiveData<List<Sessions>> getAllSessions() {
return allSessions;
}
public void getSessionById(List<Sessions> sessions){
querySingleSession.setValue(sessions);
}
public class SaveSessionsTask extends AsyncTask<List<Sessions>, Void, Void>{
private SessionsDAO dao;
public SaveSessionsTask(SessionsDAO dao) {
this.dao = dao;
}
#Override
protected Void doInBackground(List<Sessions>... lists) {
dao.addSessions(lists[0]);
return null;
}
}
// public void getSessions(){
// new GetSessionsTask(dao).execute();
// }
// public class GetSessionsTask extends AsyncTask<Void, >
}
I am trying to at the moment save all the results from network call and display them from the database. Here's my operation in viewmodel class:
public class HomeSessionsViewModel extends AndroidViewModel {
private static final String TAG = HomeSessionsViewModel.class.getSimpleName();
private MutableLiveData<SessionDetails> liveDetails;
private SessionsRepository repository;
public HomeSessionsViewModel(#NonNull Application application) {
super(application);
repository = new SessionsRepository(application);
}
// public HomeSessionsViewModel (Application application){
// repository = new SessionsRepository(application);
// }
public MutableLiveData<SessionDetails> getSessions(){
if (liveDetails == null){
liveDetails = new MutableLiveData<>();
fetchSessions();
}
return liveDetails;
}
private void fetchSessions(){
String coachId = "4086";
Call<SessionDetails> call = RestClient.getRestInstance().getSessionsService().fetchSessions(coachId);
call.enqueue(new Callback<SessionDetails>() {
#Override
public void onResponse(Call<SessionDetails> call, Response<SessionDetails> response) {
if (response.isSuccessful()){
SessionDetails details = response.body();
List<Sessions> sessions = details.getSessions();
Log.d(TAG, "N/w sesh size:\t" + sessions.size());
liveDetails.setValue(details); // now just displaying from network
saveSessions(sessions);
}
}
#Override
public void onFailure(Call<SessionDetails> call, Throwable t) {
}
});
}
private void saveSessions(List<Sessions> sessions) {
repository.saveSessions(sessions);
}
public LiveData<List<Sessions>> fetchSessionsDB(){
return repository.getAllSessions();
}
}
and in ui controller (fragment), I have called the viewmodel's fetchSessionsDB() method but no data is shown. The network request works well as I was displaying from there before adding room. What could be wrong here? Thank you.
API Response:
{
"session_details": [
{
"prg_session_name": "Session-16",
"prg_session_id": "987",
"prg_session_equipment": null,
"prg_session_description": "",
"prg_session_focus_points": "",
"prg_session_image": "http://devsports.copycon.in/includes/uploads/Jellyfish5.jpg",
"session_complete": "0",
"prg_name": "cricket coaching",
"reference_id": "293",
"batch_id": "57",
"batch_name": "Batch 3",
"player_count": "10"
}, .... ]}
and SessionDetails POJO:
public class SessionDetails {
#SerializedName("session_details")
#Expose
private List<Sessions> sessions;
#SerializedName("status")
private String status;
#SerializedName("message")
private String msg;
public List<Sessions> getSessions() {
return sessions;
}
}
fragment class where db data should be displayed:
private void populateSessions() {
sessionsRV = fragmentBinding.sessionsRV;
sessionsRV.setHasFixedSize(false);
LinearLayoutManager hlm = new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false);
sessionsRV.setLayoutManager(hlm);
sessionsViewModel = ViewModelProviders.of(this).get(HomeSessionsViewModel.class);
// sessionsViewModel.fetchSessions(""); // TODO: 3/16/2019 Use coach id from db
// calling db from viewmodel
sessionsViewModel.fetchSessionsDB().observe(this, new Observer<List<Sessions>>() {
#Override
public void onChanged(#Nullable List<Sessions> sessions) {
sessionsAdapter = new SessionsAdapter(getActivity(), sessions);
sessionsRV.setAdapter(sessionsAdapter);
Log.d(TAG, "Sessions Count:\t" + sessionsAdapter.getItemCount()); // logs 0
}
});
// previously from network directly displayed
// sessionsViewModel.getSessions().observe(this, new Observer<SessionDetails>() {
// #Override
// public void onChanged(#Nullable SessionDetails details) {
// List<Sessions> list = details.getSessions();
// sessionsAdapter = new SessionsAdapter(getActivity(), list);
// sessionsRV.setAdapter(sessionsAdapter);
// Log.d(TAG, "Sessions Count:\t" + sessionsAdapter.getItemCount());
// }
// });
}
Sports Database class:
#Database(entities = {CoachDB.class, Sessions.class}, version = 1, exportSchema = false)
public abstract class SportsDatabase extends RoomDatabase {
private static SportsDatabase instance;
public abstract CoachDAO coachDAO();
public abstract SessionsDAO sessionsDAO();
public static synchronized SportsDatabase getInstance(Context context) {
if (instance == null){
instance = Room.databaseBuilder(context.getApplicationContext(), SportsDatabase.class, "sports_db")
.fallbackToDestructiveMigration()
.build();
}
return instance;
}
}
I have solved this issue by modifying my #insert method in dao like
#Dao
public interface SessionsDAO {
#Insert
void addSessions(List<Sessions> sessions);
#Query("select * from sessions")
LiveData<List<Sessions>> getAllSessions();
#Query("select * from sessions where prog_sessionId = :id")
Sessions getSessionById(String id);
}
and run my async task with a list of sessions as input and it worked successfully.
private void saveSessions(List<Sessions> sessions) {
new SaveSessionsTask(dao).execute(sessions);
}
public class SaveSessionsTask extends AsyncTask<List<Sessions>, Void, Void> {
private SessionsDAO dao;
public SaveSessionsTask(SessionsDAO dao) {
this.dao = dao;
}
#Override
protected Void doInBackground(List<Sessions>... lists) {
dao.addSessions(lists[0]);
return null;
}
}
Hi guys I am trying to save objects with relations in Backendless via API. I have two classes namely Task and Reminder. A task can be associated with many reminders hence I want a 1:N relationship between the Task table and Reminder table in Backendless. My Task class is as follows:
public class Task {
public Date created;
public Date updated;
private List<Reminder> reminders = null;
private String ownerId;
#PrimaryKey
#NonNull
private String objectId;
#NonNull
private String taskTitle;
#NonNull
private Date deadline;
#NonNull
private int isCompleted = 0;
#NonNull
private int isExpired = 0;
public String getOwnerId() {
return ownerId;
}
public void setOwnerId(String ownerId) {
this.ownerId = ownerId;
}
#NonNull
public String getObjectId() {
return objectId;
}
public void setObjectId(#NonNull String objectId) {
this.objectId = objectId;
}
public List<Reminder> getReminders() {
return reminders;
}
public void setReminders(List<Reminder> reminders) {
this.reminders = reminders;
}
public Date getCreated() {
return created;
}
public void setCreated(Date created) {
this.created = created;
}
public Date getUpdated() {
return updated;
}
public void setUpdated(Date updated) {
this.updated = updated;
}
#NonNull
public int getIsCompleted() {
return isCompleted;
}
public void setIsCompleted(#NonNull int isCompleted) {
this.isCompleted = isCompleted;
}
#NonNull
public int getIsExpired() {
return isExpired;
}
public void setIsExpired(#NonNull int isExpired) {
this.isExpired = isExpired;
}
public String getTaskTitle() {
return taskTitle;
}
public void setTaskTitle(String taskTitle) {
this.taskTitle = taskTitle;
}
public Date getDeadline() {
return deadline;
}
public void setDeadline(Date deadline) {
this.deadline = deadline;
}
}
Reminder Class:
public class Reminder {
private String title;
private Date time;
private String objectId;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Date getTime() {
return time;
}
public void setTime(Date time) {
this.time = time;
}
public String getObjectId() {
return objectId;
}
public void setObjectId(String objectId) {
this.objectId = objectId;
}
}
I am saving the objects and setting up the relation as below:
public void saveTaskToServer(final Task task) {
List<Reminder> remindersList = new ArrayList<>();
remindersList = task.getReminders();
final List<Reminder> savedReminders = new ArrayList<>();
if(remindersList!=null && remindersList.size()!=0) {
for
(Reminder reminder : remindersList) {
reminder.setTitle(task.getTaskTitle());
Backendless.Persistence.save(reminder, new AsyncCallback<Reminder>() {
#Override
public void handleResponse(Reminder response) {
savedReminders.add(response);
}
#Override
public void handleFault(BackendlessFault fault) {
Log.i("error saving remidners", fault.toString());
}
});
}
}
Backendless.Persistence.save(task, new AsyncCallback<Task>() {
#Override
public void handleResponse(Task response) {
newTask = response;
Log.i("id is ", newTask.getObjectId());
insertTask(response);
snackbarMessage.postValue("Task Created Successfully.");
}
#Override
public void handleFault(BackendlessFault fault) {
Log.i("error", fault.getMessage());
}
});
Backendless.Persistence.of(Task.class).addRelation(task, "reminders", savedReminders, new AsyncCallback<Integer>() {
#Override
public void handleResponse(Integer response) {
Log.i("response", "added" + response);
newTask.setReminders(savedReminders);
}
#Override
public void handleFault(BackendlessFault fault) {
Log.i("response", "error" + fault.toString());
}
});
}
I have tried saving the relation using the tablename:Class:n instead of the parentColumnName. Also tried saving the objectids of the reminders instead of the reminder objects themselves.The task and reminder objects get saved properly in the backendless console in their respective tables but the reminder column in the Task table still remains empty and no relations get added. Relations count in the backendless call in Android Studio also returns 0. Any advice is really appreciated. I have been following this example.
My relations were not getting saved because I was using the async callbacks in backendless!! I dont know why I didnt see that before. Since the save calls were being made before the async callbacks could finish I was ending up with null values. Fixed it by making the calls synchronous and wrapping them in an async task.
solved
Android - Firebase - Getting Child of Child Data
how to view leaf nodes both children and grandchildren
E/data: {6640={first={sub3=dbms, m5=3, m2=2, sub2=dl, sub1=cis, m3=2, sub4=socio, m4=2, sub5=english, m1=4}}}
firebase data structure
the values i want are
the children inside 6640 eg : first and second
the grandchildren inside first eg : sub1--sub5 and m1-m5
the data above is a snapshot data snapshot from a query.. how do i access each values from the following snapshot.. i created a data module and used a for each loop like this
for (DataSnapshot post : dataSnapshot.getChildren())
{
trial_module m2 = post.getValue(trial_module.class);
Log.e("data",dataSnapshot.getValue().toString());
data2.add(m2);
}
do i need to create mutiple classes to hold data?
public class Result_module {
String sub1,sub2,sub3,sub4,sub5;
long m1,m2,m3,m4,m5;
public String getSub1() {
return sub1;
}
public void setSub1(String sub1) {
this.sub1 = sub1;
}
public String getSub2() {
return sub2;
}
public void setSub2(String sub2) {
this.sub2 = sub2;
}
public String getSub3() {
return sub3;
}
public void setSub3(String sub3) {
this.sub3 = sub3;
}
public String getSub4() {
return sub4;
}
public void setSub4(String sub4) {
this.sub4 = sub4;
}
public String getSub5() {
return sub5;
}
public void setSub5(String sub5) {
this.sub5 = sub5;
}
public long getM1() {
return m1;
}
public void setM1(long m1) {
this.m1 = m1;
}
public long getM2() {
return m2;
}
public void setM2(long m2) {
this.m2 = m2;
}
public long getM3() {
return m3;
}
public void setM3(long m3) {
this.m3 = m3;
}
public long getM4() {
return m4;
}
public void setM4(long m4) {
this.m4 = m4;
}
public long getM5() {
return m5;
}
public void setM5(long m5) {
this.m5 = m5;
}
}