the error message is : incompatible types: FirestoreRecyclerOptions cannot be converted to FirebaseRecyclerOptions ----
and the code is as follows.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_agencies);
firebaseFirestore= FirebaseFirestore.getInstance();
//views definition
agencyFeed = (RecyclerView)findViewById(R.id.agencyRecyclerView);
//------Requirements for retrieving data and storing it to recycler view---
//Query ----- for retrieving data from firestore
Query query = firebaseFirestore.collection("Agencies");
// recyclerOptions
FirestoreRecyclerOptions<AgencyModel> options = new FirestoreRecyclerOptions.Builder<AgencyModel>()
.setQuery(query,AgencyModel.class)
.build();
adapter = new FirebaseRecyclerAdapter<AgencyModel, AgencyViewHolder>(options){
#NonNull
#Override
public AgencyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.agency_cards,parent,false);
return new AgencyViewHolder(view);
}
#Override
protected void onBindViewHolder(#NonNull AgencyViewHolder holder, int position, #NonNull AgencyModel model) {
holder.name.setText(model.getName());
holder.location.setText(model.getLocation());
}
};
agencyFeed.hasFixedSize();
agencyFeed.setLayoutManager(new GridLayoutManager(this,2));
agencyFeed.setAdapter(adapter);
}
//viewholder class
public class AgencyViewHolder extends RecyclerView.ViewHolder {
private TextView name, location;
public AgencyViewHolder(#NonNull View itemView) {
super(itemView);
name= itemView.findViewById(R.id.agency_name); //name of agency
location= itemView.findViewById(R.id.locationTextView);
}
}
#Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
#Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
}
You are using Firestore according to your query, therefore you have to use FirestoreRecyclerAdapter and not FirebaseRecyclerAdapter. Therefore change:
adapter = new FirebaseRecyclerAdapter<AgencyModel, AgencyViewHolder>(options){
into this:
adapter = new FirestoreRecyclerAdapter<AgencyModel, AgencyViewHolder>(options){
Related
i have a document inside firestore, that document also has a list inside is called "foods". I want to be able to load only that list of "foods" into a recyclerview, I'm not sure how to query the list for recycler options. Here is what the DB structure looks like:
Here is my Adapter
List<Order> myOrders;
public OrderDetailAdapter(#NonNull FirestoreRecyclerOptions<Order> options) {
super(options);
}
#Override
protected void onBindViewHolder(#NonNull OrderDetailAdapter.DetailsHolder holder, int position, #NonNull Order model) {
Order order = myOrders.get(position);
holder.product_name.setText(model.getProductName());
holder.product_price.setText(model.getPrice());
holder.product_quantity.setText(model.getQuantity());
holder.product_discount.setText(model.getDiscount());
}
#NonNull
#Override
public OrderDetailAdapter.DetailsHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.order_item_layout, parent,false);
return new DetailsHolder(v);
}
public class DetailsHolder extends RecyclerView.ViewHolder {
TextView product_name, product_price, product_discount, product_quantity;
public DetailsHolder(#NonNull View itemView) {
super(itemView);
product_name = itemView.findViewById(R.id.product_name);
product_price = itemView.findViewById(R.id.product_price);
product_discount = itemView.findViewById(R.id.product_discount);
product_quantity = itemView.findViewById(R.id.product_quantity);
}
}
#Override
public int getItemCount() {
return myOrders.size();
}
}
Here is my Activity:
private FirebaseFirestore db = FirebaseFirestore.getInstance();
DocumentReference documentReference;
TextView order_id, order_comment, order_date, order_total;
String order_id_value ="";
RecyclerView lstFoods;
RecyclerView.LayoutManager layoutManager;
OrderDetailAdapter orderAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_order_details);
if (getIntent() !=null)
order_id_value = getIntent().getStringExtra("order_number");
documentReference = db.collection("Requests").document(order_id_value);
lstFoods = findViewById(R.id.food_list);
lstFoods.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
lstFoods.setLayoutManager(layoutManager);
order_id.setText(order_id_value);
documentReference.addSnapshotListener(new EventListener<DocumentSnapshot>() {
#Override
public void onEvent(#Nullable DocumentSnapshot documentSnapshot, #Nullable FirebaseFirestoreException e) {
if (documentSnapshot.exists()){
Order order = documentSnapshot.toObject(Order.class);
orderAdapter.notifyDataSetChanged();
lstFoods.setAdapter(orderAdapter);
}else{
Log.d("TAG", "ERROR");
}
}
});
}
#Override
protected void onStart() {
super.onStart();
orderAdapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
orderAdapter.stopListening();
}
}
When i try to run it i get the following error:
error: incompatible types: List cannot be converted to FirestoreRecyclerOptions
super(options);
As mentioned in the title, my recyclerview does not work. No idea why, because I do not get any errors or anything in the logcat or while building the app. Is there a way I could debug this or could you point out the mistake that I did?
I've implemented another recyclerview with the adapter, but I used a simple adapter. I tried using the firebaseUI in this case, and it seems that the adapter somehow cannot retrieve the data from the firebase firestore.
https://imgur.com/a/JSLXuou The screenshot of my database structure.
My adapter:
public class ManageAdapter extends FirestoreRecyclerAdapter<Manage, ManageAdapter.ManageHolder> {
public ManageAdapter(#NonNull FirestoreRecyclerOptions<Manage> options) {
super(options);
}
#Override
protected void onBindViewHolder(#NonNull ManageHolder holder, int position, #NonNull Manage model) {
holder.textviewName.setText(model.getName());
holder.textviewGrade.setText(model.getGrade());
//holder.textviewAge.setText(String.valueOf(model.getAge()));
}
#NonNull
#Override
public ManageHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.manage_item,
parent,false);
return new ManageHolder(v);
}
class ManageHolder extends RecyclerView.ViewHolder{
TextView textviewName;
TextView textviewAge;
TextView textviewGrade;
public ManageHolder(#NonNull View itemView) {
super(itemView);
textviewAge = itemView.findViewById(R.id.manage_item_title_age);
textviewGrade = itemView.findViewById(R.id.manage_item_grade);
textviewName = itemView.findViewById(R.id.manage_item_name);
}
}
}
Main class:
private FirebaseFirestore firebaseFirestore;
private Toolbar mToolbar;
private Button delete_event;
private RecyclerView participants;
private TextView manage_events_title;
private TextView participans_text;
private ManageAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_manage_events);
final String ID = getIntent().getExtras().getString("ID");
firebaseFirestore = FirebaseFirestore.getInstance();
delete_event = (Button) findViewById(R.id.delete_event);
manage_events_title = (TextView) findViewById(R.id.manage_events_title);
participans_text = (TextView) findViewById(R.id.participants_text);
participants = (RecyclerView) findViewById(R.id.recyclerview_manage);
setUpRecyclerView();
}
private void setUpRecyclerView(){
final String ID = getIntent().getExtras().getString("ID");
Query query = firebaseFirestore.collection("Events").document(ID).collection("Users");
FirestoreRecyclerOptions<Manage> options = new FirestoreRecyclerOptions.Builder<Manage>()
.setQuery(query, Manage.class).build();
adapter = new ManageAdapter(options);
participants.setHasFixedSize(true);
participants.setLayoutManager(new LinearLayoutManager(this));
participants.setAdapter(adapter);
}
#Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
I've got a problem with my app. I am trying to show all my user's list and their details (status, phone number), but I keep on getting the null pointer exception error on the onStart method. Here is my code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customer_status);
...
}
#Override
protected void onStart() {
super.onStart();
firebaseRecyclerAdapter.startListening();
options =
new FirebaseRecyclerOptions.Builder<Users>()
.setQuery(mUserDbase, Users.class)
.build();
firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Users, UsersViewHolder>(options) {
#NonNull
#Override
public UsersViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.activity_customer_status, parent, false);
return new UsersViewHolder(view);
}
#Override
protected void onBindViewHolder(#NonNull UsersViewHolder usersViewHolder, int i, #NonNull Users users) {
usersViewHolder.setName(users.getName());
usersViewHolder.setPhone(users.getPhone());
usersViewHolder.setStatus(users.getStatus());
}
};
mUserList.setAdapter(firebaseRecyclerAdapter);
}
#Override
protected void onStop() {
super.onStop();
firebaseRecyclerAdapter.stopListening();
}
// View Holder Class
public static class UsersViewHolder extends RecyclerView.ViewHolder{
View mView;
public UsersViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setName (String name){
TextView userNameView = (TextView) mView.findViewById(R.id.name_text);
userNameView.setText(name);
}
public void setPhone (String phone){
TextView userNameView = (TextView) mView.findViewById(R.id.phone_text);
userNameView.setText(phone);
}
public void setStatus (String status){
TextView userNameView = (TextView) mView.findViewById(R.id.status_text);
userNameView.setText(status);
}
}
}
I've followed this question: Error in FirebaseListAdapter.startListening(), which explains that the activity life cycle works as (onCreate>onStart>onResume), so assuming that (i'm a newb) I placed my on start code above my firebaseRecyclerAdapter. I've also followed this question as a guide but it didn't help me either. Please help
You are using the pointer firebaseRecyclerAdapter before initializing it.
firebaseRecyclerAdapter = new FirebaseRecyclerAdapte(){...};
firebaseRecyclerAdapter.startListening();
mUserList.setAdapter(firebaseRecyclerAdapter);
I've checked each and every bit of code in order to successfully render the data on recyclerview from Firebase, but still cannot figure out the problem.
Nothing is show on the logcat when I use Log.d for getting the children of the snapshot(means line is not executed). Can anybody point out the error.
public class MyOrders extends AppCompatActivity {
private static final String TAG = "MyOrders";
DatabaseReference databaseReference;
FirebaseRecyclerAdapter firebaseRecyclerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_orders);
RecyclerView myOrderList = findViewById(R.id.myOrderList);
Query query = FirebaseDatabase.getInstance().getReference("Requests").orderByChild("name").equalTo(User.currentUser.getUserName());
FirebaseRecyclerOptions<Request> options = new FirebaseRecyclerOptions.Builder<Request>().setQuery(query, new SnapshotParser<Request>() {
#NonNull
#Override
public Request parseSnapshot(#NonNull DataSnapshot snapshot) {
Log.d(TAG, "onCreate: "+snapshot.getChildrenCount());
return new Request(snapshot.child("name").getValue().toString(), snapshot.child("phone").getValue().toString(), snapshot.child("address").getValue().toString(), snapshot.child("total").getValue().toString());
}
}).build();
firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Request, MyOrdersViewHolder>(options){
#NonNull
#Override
public MyOrdersViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.my_order_template, viewGroup, false);
return new MyOrdersViewHolder(v);
}
#Override
protected void onBindViewHolder(#NonNull MyOrdersViewHolder holder, int position, #NonNull Request model) {
Log.d(TAG, "onCreate: "+position);
holder.setOrder_id(firebaseRecyclerAdapter.getRef(position).getKey());
holder.setOrder_status(model.getOrderStatus());
holder.setOrder_items(model.getRequestedOrderList().size()+"");
holder.setItemClickLitener(new ItemClickLitener() {
#Override
public void onClick(View v, int pos, boolean isLongClick) {
Toast.makeText(MyOrders.this, ""+"Pending Action", Toast.LENGTH_SHORT).show();
}
});
}
};
myOrderList.setAdapter(firebaseRecyclerAdapter);
}
#Override
protected void onStart() {
super.onStart();
firebaseRecyclerAdapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
firebaseRecyclerAdapter.stopListening();
}
}
My Structure:
I am developing a chat app by using firebase realtime database. I am using FirebaseRecyclerAdapter to display messages. But the thing is on scrolling, messages get duplicated and out of order.
Here is my implementation:
public class FirebaseChatActivity extends AppCompatActivity {
private String messageSenderId;
private String messageReceiverId;
private FirebaseRecyclerAdapter<ChatMessage, MessageViewHolder> firebaseRecyclerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_firebase_chat);
RecyclerView recyclerView = findViewById(R.id.rv_firebase_chat_activity);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
messageSenderId = "eoSU5m7PyucyC9h30JfHhV6S8Av2";
messageReceiverId = "ZOqofCid0XN5ovIAj1mXhRYxdnO2";
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
Query query = rootRef.child("messages").child(messageSenderId).child(messageReceiverId);
FirebaseRecyclerOptions<ChatMessage> firebaseRecyclerOptions = new FirebaseRecyclerOptions.Builder<ChatMessage>()
.setQuery(query, ChatMessage.class)
.build();
firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<ChatMessage, MessageViewHolder>(firebaseRecyclerOptions) {
#Override
protected void onBindViewHolder(#NonNull MessageViewHolder messageViewHolder, int position, #NonNull ChatMessage message) {
if (message.getMessageType().equals("text")) {
messageViewHolder.showMessage.setText(message.getMessageText());
} else if (message.getMessageType().equals("image")) {
try {
Glide.with(getApplicationContext())
.load(message.getPhotoUrl())
.placeholder(R.drawable.no_image2)
.error(R.drawable.image_1)
.into(messageViewHolder.photoImageView);
} catch (Exception e) {
Log.d("MessageAdapterLog", e.toString());
}
}
}
#Override
public MessageViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
android.view.View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_item_right, parent, false);
return new MessageViewHolder(view);
}
};
recyclerView.setAdapter(firebaseRecyclerAdapter);
}
private class MessageViewHolder extends RecyclerView.ViewHolder {
public TextView showMessage;
public ImageView photoImageView;
public MessageViewHolder(#NonNull android.view.View itemView) {
super(itemView);
showMessage = itemView.findViewById(R.id.show_message);
photoImageView = itemView.findViewById(R.id.photo_image_view);
}
}
#Override
protected void onStart() {
super.onStart();
firebaseRecyclerAdapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
if (firebaseRecyclerAdapter!= null) {
firebaseRecyclerAdapter.stopListening();
}
}
}
I have tried many different solutions e.g set as mentioned here as well as .addChildEventListener (completely different implementation) but unable to solve the issue.
Full Activity code as well as database structure is attached. Kindly let me know what I am doing wrong.
Thanks
The problem is that everytime you scroll, to make a new item visible again it will run the code inside your onBindViewHolder to inflate that view and rebind it.
if (message.getMessageType().equals("text")) {
messageViewHolder.showMessage.setText(message.getMessageText());
} else if (message.getMessageType().equals("image")) {
try {
Glide.with(getApplicationContext())
.load(message.getPhotoUrl())
.placeholder(R.drawable.no_image2)
.error(R.drawable.image_1)
.into(messageViewHolder.photoImageView);
} catch (Exception e) {
Log.d("MessageAdapterLog", e.toString());
}
}
}
to solve this problem you will need to override two methods inside your adapter
#Override
public long getItemId(int position) {
return position;
}
#Override
public int getItemViewType(int position) {
return position;
}