Value event listener for firebase database being skipped

  • Thread starter Android Central Question
  • Start date
A

Android Central Question

0

I get an error in the requests adapter saying list.size = null. When debugging, I noticed the value event listener is not being triggered and it jumps directly to the adapter = new request adapter I have used the same instantiation of the database reference in other parts of the code and it works so I am not sure why this is happening? help please! :(

public class Requests extends Fragment {


RecyclerView acted, unseen;
RecyclerView.Adapter adapter, adapter2;
ArrayList<Requestitem> requestitems;

public Requests() {
// Required empty public constructor
}
@override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_requests, container, false);

}
@override
public void onViewCreated(View view, @nUllaBle Bundle savedInstanceState)
{
unseen = getView().findViewById(R.id.recunseen);
acted = getView().findViewById(R.id.reqacted);

unseen.setLayoutManager(new LinearLayoutManager(this.getContext()));
acted.setLayoutManager(new LinearLayoutManager(this.getContext()));
DatabaseReference userefdata = FirebaseDatabase.getInstance().getReference().child("Requests");
userefdata.addValueEventListener(new ValueEventListener() {

@override
public void onDataChange(@NonNull DataSnapshot snapshot) {

for (DataSnapshot snap : snapshot.getChildren()) {

Requestitem evt = new Requestitem(snap.child("name").getValue(String.class),
snap.child("major").getValue(String.class),
snap.child("time").getValue(String.class),
snap.child("riderid").getValue(String.class),
snap.child("driverid").getValue(String.class),
false
);

requestitems.add(evt);
}
adapter.notifyDataSetChanged();

}

@override
public void onCancelled(@NonNull DatabaseError error) {

}

});
adapter2 = new RequestAdapter(requestitems, new RequestAdapter.OnItemClickListener() {
@override
public void OnItemClick(Requestitem ev) {
showselected(new Profile(ev.getRiderid()));
}
});

adapter = new RequestAdapter(requestitems, new RequestAdapter.OnItemClickListener() {
@override
public void OnItemClick(Requestitem ev) {
showselected(new Profile(ev.getRiderid()));
}
});
acted.setAdapter(adapter2);
unseen.setAdapter(adapter);

}

private void showselected(Fragment f){

getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.cont, f)

.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)

.commit();

}
}
 

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