I'm having a problem with making a RecycleView in a fragment with data from Firebase. I expect the app to show the RecycleView after I clicked on a button to change from one fragment to the RecycleView fragment, but it does change the showed fragment but it does not show anything.
I know there are plenty of questions like this but I don't seem to find the correct solution to this problem.
I've made everything needed for a Firebase RecyclerView, and also tried to build it inside an activity instead fragment and it did work, but not with the fragment.
I've tried to initialize the adapter and recyclerview inside the onCreateView method, onActivityCreated, and onViewCreated method and none of them seem to be working.
Here's my fragment code:
private KidAdapter adapter;
private RecyclerView recyclerView;
Button button;
View view;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.uangsaku_menu_fragment, container, false);
button = view.findViewById(R.id.btn_add);
button.setOnClickListener(this);
recyclerView = view.findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
setUpRecyclerView();
return view;
}
#Override
public void onClick(View v) {
if(v.getId() == R.id.btn_add){
Intent intent = new Intent(getActivity(), Register.class);
startActivity(intent);
}
}
public void setUpRecyclerView(){
Query query = FirebaseDatabase.getInstance().getReference("kids");
FirebaseRecyclerOptions<kidData> options = new FirebaseRecyclerOptions.Builder<kidData>()
.setQuery(query, kidData.class)
.build();
adapter = new KidAdapter(options);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false);
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setAdapter(adapter);
}
#Override
public void onStart() {
super.onStart();
if (adapter != null) {
adapter.startListening();
}
}
#Override
public void onStop() {
super.onStop();
if (adapter != null) {
adapter.stopListening();
}
}
}
The adapter class
public class KidAdapter extends FirebaseRecyclerAdapter<kidData, KidAdapter.KidViewHolder> {
public KidAdapter(#NonNull FirebaseRecyclerOptions<kidData> options) {
super(options);
}
#Override
protected void onBindViewHolder(#NonNull KidViewHolder holder, int position, #NonNull kidData model) {
holder.nama.setText(model.getKidName());
holder.balance.setText(model.getKidBalance());
holder.limit.setText("Limit: "+model.getKidLimit());
holder.spending.setText("Spending xxx.xxx");
}
#NonNull
#Override
public KidViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.kids_card,
viewGroup, false);
return new KidViewHolder(v);
}
public class KidViewHolder extends RecyclerView.ViewHolder {
TextView nama, balance, limit, spending;
public KidViewHolder(#NonNull View itemView) {
super(itemView);
nama = itemView.findViewById(R.id.tv_nama);
balance = itemView.findViewById(R.id.tv_balance);
limit = itemView.findViewById(R.id.tv_dailylimit);
spending = itemView.findViewById(R.id.tv_dailyspending);
}
}
}
The kidData model class
public class kidData {
String kidName, kidEmail, kidDoB, kidLimit, kidBalance;
public kidData(){
}
public kidData(String kidName, String kidEmail, String kidDoB, String kidLimit, String kidBalance) {
this.kidName = kidName;
this.kidEmail = kidEmail;
this.kidDoB = kidDoB;
this.kidLimit = kidLimit;
this.kidBalance = kidBalance;
}
public String getKidName() {
return kidName;
}
public String getKidEmail() {
return kidEmail;
}
public String getKidDoB() {
return kidDoB;
}
public String getKidLimit() {
return kidLimit;
}
public String getKidBalance() {
return kidBalance;
}
}
The problem in your code is the use of the following line of code:
recyclerView.setHasFixedSize(true);
And this is because when using the latest version of Firebase-UI library, there is no need to set the size of the RecyclerView as fixed. The solution for solving this problem is to simply remove/comment the above line of code. That's it!
Related
I am using navigation component in my app I have 2 fragments one fragments list of items and another shows detail of an item when user clicks on an item in fragments 1 it goes to detail fragment and when I switch back to first fragment then all the listing duplicates again.
Below is my code:
CakeFragment.java
public class CakeFragment extends Fragment {
List<AllCakes> allCakeList = new ArrayList<>();
AllCakesAdapter adapter;
BottomNavigationView navView;
FragmentCakeBinding fragmentCakeBinding;
public CakeFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
fragmentCakeBinding = FragmentCakeBinding.inflate(inflater,container,false);
navView = getActivity().findViewById(R.id.navView);
navView.setVisibility(View.GONE);
getAllCakes();
return fragmentCakeBinding.getRoot();
}
private void getAllCakes(){
Retrofit retrofit = RetrofitClient.getInstance();
ApiService apiService = retrofit.create(ApiService.class);
Call<List<AllCakes>> call = apiService.getAllCake();
call.enqueue(new Callback<List<AllCakes>>() {
#Override
public void onResponse(Call<List<AllCakes>> call, Response<List<AllCakes>> response) {
fragmentCakeBinding.cakeProgress.setVisibility(View.INVISIBLE);
fragmentCakeBinding.allCakeRecycler.setHasFixedSize(true);
fragmentCakeBinding.allCakeRecycler.setLayoutManager(new LinearLayoutManager(getActivity()));
allCakeList.addAll(response.body());
adapter = new AllCakesAdapter(getActivity(),allCakeList);
fragmentCakeBinding.allCakeRecycler.setAdapter(adapter);
}
#Override
public void onFailure(Call<List<AllCakes>> call, Throwable t) {
fragmentCakeBinding.cakeProgress.setVisibility(View.INVISIBLE);
TastyToast.makeText(getActivity(),t.getMessage(),TastyToast.LENGTH_SHORT,TastyToast.ERROR).show();
}
});
}
}
AllCakesAdapter.java
public class AllCakesAdapter extends RecyclerView.Adapter<AllCakesAdapter.ViewHolder> {
Context context;
List<AllCakes> allCakeList;
public AllCakesAdapter(Context context, List<AllCakes> allCakeList) {
this.context = context;
this.allCakeList = allCakeList;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.allcakes_row,parent,false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
AllCakes model = allCakeList.get(position);
Glide.with(context).load(model.getImgurl()).into(holder.allCakeImg);
holder.allCakeName.setText(model.getName());
holder.cakeDisPrice.setPaintFlags(holder.cakeDisPrice.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
holder.moreCake.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
NavController navController = Navigation.findNavController((Activity) context,R.id.fragment);
navController.navigate(R.id.cakeDetailFragment);
}
});
}
#Override
public int getItemCount() {
return allCakeList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView allCakeImg;
Button moreCake;
TextView allCakeName;
public ViewHolder(#NonNull View itemView) {
super(itemView);
allCakeImg = itemView.findViewById(R.id.allCakeImg);
moreCake = itemView.findViewById(R.id.moreCake);
allCakeName = itemView.findViewById(R.id.allCakeName);
}
}
}
CakeDetailFragment.java
public class CakeDetailFragment extends Fragment {
FragmentCakeDetailBinding fragmentCakeDetailBinding;
public CakeDetailFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
fragmentCakeDetailBinding = FragmentCakeDetailBinding.inflate(inflater,container,false);
return fragmentCakeDetailBinding.getRoot();
}
}
Why is this happening?
private void getAllCakes(){
...
allCakeList.addAll(response.body());
adapter = new AllCakesAdapter(getActivity(),allCakeList);
fragmentCakeBinding.allCakeRecycler.setAdapter(adapter);
}
...
you're calling:
allCakeList.addAll(response.body());
every time without clearing your list out.
you have to clear that list:
allCakeList.clear();
allCakeList.addAll(response.body());
this is something you can easily determine yourself by just putting a breakpoint on your allCakeList to see what's inside it, if you haven't ever done this before, you should consider trying it out
Try the following and see if it solves your issue
CakeFragment.java
allCakeList.clear();
allCakeList.addAll(response.body());
//rest of the logic remains same
Need help with android app (java)
My app starts with SplashActivity. During it I`m getting json via retrofit request and after successfull response I fill my DB
SplashActivity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
ISplashInteractor splashInteractor = new SplashInteractor();
moviePresenter = new MoviePresenter(this, splashInteractor);
moviePresenter.initDB();
}
after DB successfully loaded automatically starts MovieListActivity
public class MovieListActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_movie_list);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
Fragment allMoviesFragment = new AllMoviesFragment();
String tag = "MovieList";
transaction.replace(R.id.main_container, allMoviesFragment, tag);
transaction.commit();
}
}
and at once list of movies loads inside inner fragment AllMoviesFragment(inside recyclerView). till this point everything is ok.
now I set onRecyclerViewItemClickListener - it must open another fragment inside MovieListActivity but instead of this - my app restarts from begining and I observe loading of SpalshActivity again(I put progressbar during request) and again my RecyclerView...
my RecyclerViewAdapter
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
private List<MovieDetails> movieList;
private OnRecyclerViewItemClickListener onRecyclerViewItemClickListener;
public RecyclerViewAdapter(List<MovieDetails> movieList) {
this.movieList = movieList;
}
public void setOnRecyclerViewItemClickListener(OnRecyclerViewItemClickListener onRecyclerViewItemClickListener){
this.onRecyclerViewItemClickListener = onRecyclerViewItemClickListener;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.simple_selectable_list_item, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
MovieDetails movieDetails = (movieList.get(position));
holder.name.setText(movieDetails.getTitle());
holder.year.setText(String.valueOf(movieDetails.getReleaseYear()));
}
#Override
public int getItemCount() {
if (movieList == null)
return 0;
return movieList.size();
}
class ViewHolder extends RecyclerView.ViewHolder {
TextView name;
TextView year;
public ViewHolder(View itemView) {
super(itemView);
name = itemView.findViewById(R.id.movie_name);
year = itemView.findViewById(R.id.release_year);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(onRecyclerViewItemClickListener != null){
int position = getAdapterPosition();
if(position != RecyclerView.NO_POSITION){
onRecyclerViewItemClickListener.onRecyclerViewItemClick(position);
}
}
}
});
}
}
public interface OnRecyclerViewItemClickListener {
void onRecyclerViewItemClick(int position);
}
}
my AllMoviesFragment
public class AllMoviesFragment extends Fragment implements RecyclerViewAdapter.OnRecyclerViewItemClickListener {
private static final String CURR_MOVIE = "Current Movie";
private static final String TAG = "MSApp";
List<MovieDetails> movieList;
RecyclerView recyclerView;
public AllMoviesFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
movieList = App.getAppInstance().getDatabaseInstance().getMovieDao().getAllMovies();
movieList.sort(new Comparator<MovieDetails>() {
#Override
public int compare(MovieDetails o1, MovieDetails o2) {
return o2.getReleaseYear() - o1.getReleaseYear();
}
});
View resultView = inflater.inflate(R.layout.fragment_all_movies, container, false);
recyclerView = resultView.findViewById(R.id.recycler_view);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
RecyclerViewAdapter adapter = new RecyclerViewAdapter(movieList);
adapter.setOnRecyclerViewItemClickListener(AllMoviesFragment.this);
recyclerView.setAdapter(adapter);
return resultView;
}
#Override
public void onRecyclerViewItemClick(int position) {
MovieDetails choosenMovie = movieList.get(position);
FragmentManager fragmentManager = getFragmentManager();
Fragment movieDetailsFragment = new MovieDetailsFragment();
Bundle args = new Bundle();
args.putParcelable(CURR_MOVIE, choosenMovie);
movieDetailsFragment.setArguments(args);
String tag = "MovieDetails";
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_container, movieDetailsFragment, tag);
transaction.addToBackStack(tag);
transaction.commit();
}
}
sorry for long post. I dont know how to cut it
I use App class for db access if it is important
#AkakiKapanadze
you was almost right
I didnot see the error message because it disappeared less 1 second
and class MovieDetailsFragment
after I remove binder of ButterKnife all work... I dont know WHY - I always use Butterknife inside Fragments
I am still new for the android development. Currently, I am trying to show a RecyclerView within a Fragment. I tried to show the RecyclerView without using Fragment and it worked fine. But when it come to using Fragment, nothing is shown.
Here is the MainActivity containing the Fragment:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//ButterKnife.bind(this);
BottomNavigationView navView = findViewById(R.id.nav_view);
navView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
mViewModel = ViewModelProviders.of(this).get(MainActivityViewModel.class);
mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.add(R.id.fragment_container, missionListFragment).addToBackStack(null).commit();
}
And the Fragment's onCreateView method:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_mission_list, container, false);
//ButterKnife.bind(rootview);
mRecycler = (RecyclerView) rootView.findViewById(R.id.recycler);
mFirestore = FirebaseFirestore.getInstance();
mQuery = mFirestore.collection("COLLECTION_NAME").limit(LIMIT);
if (mQuery == null) {
Log.w(TAG, "No query, not initializing RecyclerView. Created data on server.");
}
mAdapter = new RecyclerViewAdapter(mQuery, this) {
#Override
protected void onDataChanged() {
}
#Override
protected void onError(FirebaseFirestoreException e) {
// Show a snackbar on errors
Snackbar.make(getActivity().findViewById(android.R.id.content),
"Error: check logs for info.", Snackbar.LENGTH_LONG).show();
}
};
mRecycler.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecycler.setAdapter(mAdapter);
return rootView;
}
With the RecyclerViewAdapter:
public class RecyclerViewAdapter extends FirestoreAdapter<RecyclerViewAdapter.ViewHolder> {
private static final int UNAVAILABLE = 0, AVAILABLE = 1;
public interface OnItemSelectedListener {
void onItemSelected(DocumentSnapshot item);
}
private OnItemSelectedListener mListener;
public RecyclerViewAdapter(Query query, OnItemSelectedListener listener) {
super(query);
mListener = listener;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
return new ViewHolder(inflater.inflate(R.layout.item, parent, false));
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.bind(getSnapshot(position), mListener);
}
static class ViewHolder extends RecyclerView.ViewHolder {
#BindView(R.id.view1)
TextView view1;
#BindView(R.id.view2)
TextView view2;
#BindView(R.id.view3)
TextView view3;
#BindView(R.id.view4)
TextView view4;
public ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
public void bind(final DocumentSnapshot snapshot,
final OnItemSelectedListener listener) {
Item item = snapshot.toObject(Item.class);
Resources resources = itemView.getResources();
view1.setText(item.getfield1());
view2.setText(Integer.toString(item.getfield2()));
if(item.getfield3() == AVAILABLE)
view3.setText("Available");
else
view3.setText("Unavailable");
view4.setText(item.getfield4().toString());
// Click listener
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener != null) {
listener.onItemSelected(snapshot);
}
}
});
}
}
}
As you can notice above, I am getting data from the Firebase and displaying them as a RecyclerView. But I don't think it is the problem of empty query data, so please help.
It could be that data from firebase is not being retrieved, hence there is no content for recyclerview to display. Please check if your firebase connection is working fine and you are retrieving something from it
I have activity and 3 fragments in ViewPage.
In last fragment I have recycleView, if i move to this page i want to refresh recycle view and its work only if I call:
mAdapter = new LocationAdapter(mListener.loadLocationList());
mRecyclerView.setAdapter(mAdapter);
This should work aswell after call notifyDataSetChanged but didn't.
What can we wrong ?
in last fragment:
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mRecyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new LocationAdapter(mListener.loadLocationList());
mRecyclerView.setAdapter(mAdapter);
}
private class HistoryFragmentReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (HISTORY_FRAGMENT_SELECTED.equals(intent.getAction())){
updateLocationList();
}
}
}
private void updateLocationList() {
mAdapter = new LocationAdapter(mListener.loadLocationList());
mRecyclerView.setAdapter(mAdapter);
}
i wanted notifydatasetchanged instead of 2 lines in updatelocationlist()
LocationAdapter:
public class LocationAdapter extends RecyclerView.Adapter<LocationAdapter.LocationViewHolder> {
private LinkedList<LatLng> mDataset;
public static class LocationViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public View mTextView;
public LocationViewHolder(View v) {
super(v);
mTextView = v;
}
}
public LocationAdapter(LinkedList<LatLng> myDataset) {
mDataset = myDataset;
}
#NonNull
#Override
public LocationAdapter.LocationViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int i) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View v = layoutInflater.inflate(R.layout.my_text_view, parent, false);
LocationViewHolder vh = new LocationViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(#NonNull LocationAdapter.LocationViewHolder locationViewHolder, int position) {
TextView textView = locationViewHolder.mTextView.findViewById(R.id.textView3);
textView.setText(String.valueOf(mDataset.get(position)));
}
#Override
public int getItemCount() {
return mDataset.size();
}
}
The problem is you set data only in your adapter's constructor.
When you call notifyDataSetChanged you can't expect that your adapter will take new data magically. You have to set it by yourself.
My suggestion would be add a setData method in your adapter and call it before notifyDataSetChanged.
Something like this in your adapter:
public void setData(LinkedList<LatLng> myDataset) {
mDataset = myDataset
}
and in your caller:
private void updateLocationList() {
mAdapter.setData(mListener.loadLocationList());
mAdapter.notifyDataSetChanged();
}
I'm trying to retrieve data from Firebase to Recyclerview. I've already implement all other steps but now i'm getting error at the last stage when i'm implementing the adapter(FirebaseRecyclerAdapter).
My Fragment
public class Journal extends Fragment {
RecyclerView recyclerView;
DatabaseReference myref;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_journal,container,false);
myref= FirebaseDatabase.getInstance().getReference("/Journal");
recyclerView = (RecyclerView) v.findViewById(R.id.journal_rv);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
FirebaseRecyclerAdapter<JournalEntry, JournalHolder> adapter = new FirebaseRecyclerAdapter<JournalEntry, JournalHolder>(
JournalEntry.class,
R.layout.journal_list_item,
JournalHolder.class,
myref) {
#Override
protected void onBindViewHolder(JournalHolder holder, int position, JournalEntry model) {
holder.setTitle(model.getEvent_title());
holder.setContent(model.getEvent_content());
holder.setSchool(model.getSchool_name());
holder.setDate(model.getDate());
holder.setStudents(model.getNumber_of_students());
holder.setSchoolIv(model.getImg_url());
}
#Override
public JournalHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return null;
}
};
return v;
}
public static class JournalHolder extends RecyclerView.ViewHolder{
TextView Jtitle , Jcontent,Jschool,Jstudents,jdate;
ImageView schoolIV;
public JournalHolder(View itemView) {
super(itemView);
Jtitle =(TextView)itemView.findViewById(R.id.journal_title);
Jcontent =(TextView)itemView.findViewById(R.id.event_content);
Jschool =(TextView)itemView.findViewById(R.id.journal_school);
Jstudents =(TextView)itemView.findViewById(R.id.journal_students);
jdate = (TextView)itemView.findViewById(R.id.journal_dates) ;
schoolIV = (ImageView)itemView.findViewById(R.id.journal_image);
}
public void setTitle(String title) {
Jtitle.setText(title);
}
public void setContent(String content) {
Jcontent.setText(content);
}
public void setSchool(String school) {
Jschool.setText(school);
}
public void setDate(String date) {
jdate.setText(date);
}
public void setStudents(String students) {
Jstudents.setText(students);
}
public void setSchoolIv(String schoolIv) {
Picasso.with(itemView.getContext())
.load(schoolIv)
.into(schoolIV);
}
}
}
This is what is shown as error
FireBaseRecyclerView in FirebaseRecyclerView can not be applied to :
JournalEntry.class (java...consti.last.database.JournalEntry>)
R.layout.journal_list_item (int)
BlogViewHolder.class (java...consti.last.Journal.BlogViewHolder>)
myref (com...firebase.database.DatabaseReference)
Please help me. I tried all the methods but nothing works.
Or if you have any advice...thank you in advance.
PS : I'm using Fragments
under Activity declaration write:-
private FirebaseRecyclerAdapter<JournalEntry, JournalHolder> adapter;
then inside onCreateView():
adapter = new FirebaseRecyclerAdapter<JournalEntry, JournalHolder>(
JournalEntry.class,
R.layout.journal_list_item,
JournalHolder.class,
myref) { //be sure that these classes and parameters are correct..
above return v;:
recyclerView.setAdapter(adapter);
Use this method instead of onBindViewHolder:
#Override
protected void populateViewHolder(JournalHolder holder,JournalEntry model, int position) {
Be sure you have all the correct methods in the model class JournalEntry.class and holder class JournalHolder.class and that its the right location and right layout.
I finally found solution here:Firebase RecyclerView
I had the same problem.
In this version FirebaseResycleView use the following:
Query query = FirebaseDatabase.getInstance()
.getReference(); // you can add child as .child("child_name");
FirebaseRecyclerOptions<JournalEntry> options = new FirebaseRecyclerOptions.Builder<JournalEntry>()
.setQuery(query, JournalEntry.class)
.build();
FirebaseRecyclerAdapter<JournalEntry, JournalHolder> adapter = new FirebaseRecyclerAdapter<JournalEntry, JournalHolder>(
options) {
#Override
protected void onBindViewHolder(JournalHolder holder, int position, JournalEntry model) {
holder.setTitle(model.getEvent_title());
holder.setContent(model.getEvent_content());
holder.setSchool(model.getSchool_name());
holder.setDate(model.getDate());
holder.setStudents(model.getNumber_of_students());
holder.setSchoolIv(model.getImg_url());
}
#Override
public JournalHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.journal_list_item, parent, false);
return new JournalHolder(view);
}
};
And after don't forget:
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(adapter);
adapter.startListening();