this my view fragment from real time database my code working so well and when i add the code to delete the database child it gives me many errors i want to delete child from posts after for example 10 days img1
public class HomeView extends Fragment {
private View view;
private RecyclerView recentPosts;
private DatabaseReference donor_ref;
FirebaseAuth mAuth;
private BloodRequestAdapter restAdapter;
private List<CustomUserData> postLists;
private ProgressDialog pd;
public HomeView() {
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.home_view_fragment, container, false);
recentPosts = (RecyclerView) view.findViewById(R.id.recyleposts);
recentPosts.setLayoutManager(new LinearLayoutManager(getContext()));
donor_ref = FirebaseDatabase.getInstance().getReference();
postLists = new ArrayList<>();
pd = new ProgressDialog(getActivity());
pd.setMessage("Loading");
pd.setCancelable(true);
pd.setCanceledOnTouchOutside(false);
mAuth = FirebaseAuth.getInstance();
getActivity().setTitle("My First Project");
restAdapter = new BloodRequestAdapter(postLists);
RecyclerView.LayoutManager pmLayout = new LinearLayoutManager(getContext());
recentPosts.setLayoutManager(pmLayout);
recentPosts.setItemAnimator(new DefaultItemAnimator());
recentPosts.addItemDecoration(new DividerItemDecoration(getActivity(), LinearLayoutManager.VERTICAL));
recentPosts.setAdapter(restAdapter);
AddPosts();
return view;
}
private void AddPosts()
{
Query allposts = donor_ref.child("posts");
pd.show();
allposts.addListenerForSingleValueEvent(new ValueEventListener() {
private DataSnapshot snapshot;
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.exists()) {
for (DataSnapshot singlepost : dataSnapshot.getChildren()) {
CustomUserData customUserData = singlepost.getValue(CustomUserData.class);
postLists.add(customUserData);
restAdapter.notifyDataSetChanged();
}
pd.dismiss();
}
else
{
Toast.makeText(getActivity(), "Database Is Empty",
Toast.LENGTH_LONG).show();
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
Log.d("User", databaseError.getMessage());
}
});
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onStop() {
super.onStop();
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
i tried to delete realtime database child after X day it not working also gives me many errors here's the code for deletion
long cutoff = new Date().getTime()-TimeUnit.MILLISECONDS.convert(10, TimeUnit.DAYS);
Date d = new Date(cutoff );
SimpleDateFormat dateFormatGmt = new SimpleDateFormat("yyyy-MM-dd");
String old_date = `dateFormatGmt.format(new Date(cutoff));
ref2 = new Firebase("https://b-bank-39.firebaseio.com/posts/" + Date);
ref2.child(old_date).removeValue();
Any Support About Modify The Code Thanks
