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Firebase recycler adapter query

firebase recycler adapter query toString()); searchMode = true; } else { searchMode = false; findButton. Don't know why it says "No adapter attached" I set the layout manager and the recycler view, in middle of showProducts(); method i also set the adapter to the recycler view and still says: "No adapter attached" Can't find where is the issue, i'll gladly accept some help. We get this DocumentReference from the DocumentSnapshot, by calling getSnapshots (). 🔧 asdf-firebase - An asdf-vm plugin for firebase-tools. I could hide the RecyclerView; Or create a Firestore Query which I am sure will not return any result. You commonly have to use the view holder pattern with adapters for ListView as described earlier in the chapter to avoid repeated calls to Get code examples like "recyclerview setup android" instantly right from your google search results with the Grepper Chrome Extension. Inside that click on Firebase. * * @param <T> The class type to use as a model for the data contained in the children of the given Firebase location */ public abstract class FirebaseListAdapter<T> extends BaseAdapter { private Query mRef; private Class<T> mModelClass; private int mLayout; private LayoutInflater mInflater; private List<T> mModels; private Map<String, T adapter = null; foreach (var item in items) { Account account = new Account(); account. FirebaseRecyclerAdapter. Query query = FirebaseDatabase. The adapter is used to set data to Recycler View from Data source. getInstance() . firebase. row_user_list, FirebaseUserViewHolder. getChildren()) { StudentDetails studentDetails = dataSnapshot. Thanks folks! Nothing shows on screen for the following code: Main activity: Posts about Recyclerview written by vortana say. limitToLast(50); Create the Options for FirebaseRecyclerView Options. Finally, we call updateOptions (). collection("sports") Once the call is successful, it returns all the documents inside that collection. /path/to/serviceAccountKey. Best used public FirebaseRecyclerViewAdapter(java. Right now, I just want to add an element to an recyclerView adapter, but when I add the second item, the logcat on Android Studio shows the following exception:. . I. Browse other questions tagged java android firebase android-recyclerview native-ads or ask your own question. addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange Android Firebase Remove An Item From A List, If you are viewing items from Firebase database onto the recyclerview/list and trying to remove each item per click or swipe to delete, this solution is for you: First, lets assume we a List listOfApples = new ArrayList<>(); and it has some data in it. But something simple, even if imperfect, would be better than the yawning maw of unrestricted billing that keeps us all up at night. If the adapter has previously been set, all we need to do next is figure out whats been added/deleted/updated given the new list and comparing against the list kept by the adapter; notifying the This repository is maintained by Googlers but is not a supported Firebase product. How does it work? It binds the results of a query to a recyclerview while responding to all the real-time events When we instantiate the FirestoreRecyclerAdapter, we have to pass it a FirestoreRecyclerOptions object which contains a Firestore Query. After creating this class add the below code to it. Add Collection named "friends". . Spin up your backend without managing servers. ui. FIREBASE_DATABASE_LOCATION_USERS) . private static final String TAG = "FirebaseRecyclerAdapter"; private FirebaseRecyclerOptions<T> mOptions; private ObservableSnapshotArray<T> mSnapshots; /**. Link donate : https://www. LENGTH_LONG). Adapter} that listens to a Firebase query. Query ref) Parameters: activity - The activity containing the ListView modelClass - Firebase will marshall the data at a location into an instance of a class that you provide public int findRelativeAdapterPositionIn (Adapter <? extends RecyclerView. Query ref) Parameters: modelClass - Firebase will marshall the data at a location into an instance of a class that you provide private void setUpFirebaseAdapter (Query query) { mFirebaseAdapter = new FirebaseRecyclerAdapter<UserModel, FirebaseUserViewHolder> (UserModel. Active 1 year, 4 months ago. setEnabled(false); } query. FirebaseRecyclerPagingAdapter is built on top of Android Paging Support Library. It supports offline mode so our app will work fine (write, read, listen to, and query data) whether device has internet connection or not, it automatically fetches changes from our database to Firebase Server. Adapter where getItemCount() return 0. credential. java. database. bindUser (model); } }; my_recycler_view. startAt(searchText). To use the FirebaseUI to display list of data, we need: – Java class for data object (Model)– Java class for holding UI elements that match with Model’s fields (ViewHolder and layout) Let’s create a query for our collection “sports”. class, query) { @Override protected void populateViewHolder (FirebaseUserViewHolder viewHolder, UserModel model, int position) { customeLoaderDialog. We will receive data from Firebase Realtime Database and populate an ArrayList. With love and admiration, a Firebase user Disposes the adapter so it no longer receives update from MediaQueue. In this video i am showing how to bind view in FirebaseRecyclerAdapt pagination is also known as load more functionality or infinite loading. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. js – part 3 Recycler view is more advanced version of list view and it works based on View holder design pattern. /adapter' ; // Create a store to hold your Mappers export default const store = new DataStore (); // Mappers in "store" will use the Firebase adapter by default store. Adapter rather than android. name; account. add(studentDetails); } adapter = new RecyclerViewAdapter(ShowStudentDetailsActivity. Since light pictures are easier to load (so make my app faster) and after some TB I will start pay I took a look at how whatsapp handles images and I saw that it uses JPEG images with an average weight of 180-200 KB. Use it as FirebaseRecyclerPagingAdapter#retry (). getValue(StudentDetails. These examples are extracted from open source projects. build(); Create the Adapter Firebase UI RecyclerView Adapter Android Tutorial with Example. this, "Started Search", Toast. net/7wBe3CIn this tutorial , i will show yo private void getUsers(String nodeId) { Query query; if (nodeId == null) query = FirebaseDatabase. child(Consts. The FirestoreRecyclerAdapter will automatically take care of updating it’s data set and displaying any remove animations. ui. Firebase UI RecyclerView Adapter Android Tutorial with Example. orderByChild("name"). 0. firebase. In this video learn to bind view using Oncreate viewholder and OnBindView holder method . 1'} // place this at the bottom of the file. Step 7: Now we will move towards creating an Adapter class. Rajat Feel free to contact us @ below Email We will sure reply your query with-in 2 - 6 hours Browse other questions tagged java android firebase android-recyclerview native-ads or ask your own question. getTime(); see demo Discover Firebase Integrate Firebase into an Android app Create your first authentication system Improve your authentication system with social media Implement account management for the user Quiz: Test your knowledge Create your first data structure Improve user management with Firestore Implement a chat room Send messages in the chat room Quiz: Test your knowledge Get a local image on the import { FirebaseAdapter } from 'js-data-firebase' ; // Create an instance of FirebaseAdapter export default const adapter = new FirebaseAdapter ( { db: window. You can delete documents and collections from the Cloud Firestore page in the console. Then use the file to initialize the SDK: const admin = require ('firebase-admin'); const serviceAccount = require ('. Inside that column Navigate to Firebase Cloud Firestore. example. 🔊 The Firebase Podcast - This is the place where we dive deep into Firebase products and learn new tips and tricks along the way. Another ArrayList is used to store the filtered results. Add the following security rules to your project in the: rules tab: I'm looking to implement a search function. check out : Recycler View With GridLayoutManager Show Grid View in androidx this post will help you in understanding basic about RecycleView in android and how to show data in The new instance of FirebaseRecyclerOptions is created with a query: newQuery. In fact, it’s almost omnipresent in the mobile ecosystem. It holds all the important methods dealing with the implementation of RecylcerView. After clicking on Firebase, you can get to see the right column mentioned below in the screenshot. addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { for (DataSnapshot dataSnapshot : snapshot. FirebaseRecyclerViewAdapter This class is a generic way of backing an RecyclerView with a Firebase location. Get code examples like "recyclerview setup android" instantly right from your google search results with the Grepper Chrome Extension. In the onSwiped callback we delete the corresponding document from the FirestoreDatabase, by calling delete on it’s DocumentReference. After setup Project, build. query. ViewHolder viewHolder, int localPosition) Returns the position of the given RecyclerView. We will learn how to use Firebase's own Recycler view adapter and recycler view instead of List views. VISIBLE); Query firebaseSearchQuery = mUserDatabase. ui. getReference() . ViewHolder > adapter, RecyclerView. Add Firebase Ads SDK in module level build. When you define your adapter, you need to override three key methods: onCreateViewHolder(): RecyclerView calls this method whenever it needs to create a new ViewHolder. Best used with small result sets since all results are loaded at once. And again, I / we do appreciate the complexities there. I Generate a new private key and save the JSON file. me/edmtdevFacebook : http://facebook. Later We will then pass the data from the outside into our adapter in form of a List of Upload items over our adapter’s constructor. The search method allows us search and filter our Firebase realtime database. name = item. orderByKey(); } if (itemSelected) { dataListView. 5HP GTS 22IN RECYCLER LAWNMOWER Carb TECUMSEH Engine. Carburetor Parts For TORO 6. We will then use the internet to query the data from Firebase and populate the application in an organized manner. 321. FirebaseUI Database. This method should be used only after caught in Error. “Firebase Realtime Database Pagination in Recyclerview” is published by Deepak Pradhan. adapter class Helpful product updates from Firebase Summit. 2. google-services' Initialize Firebase Ads SDK Questions: So, I recently started out with firebase and it’s pretty much fun. 😃 The same can be done in * @param query The Firebase location to watch for data changes. It supports offline mode so our app will work fine (write, read, listen to, and query data) whether device has internet connection or not, it automatically fetches changes from our database to Firebase Server. Adapter). Also you should integrate the Firebase project with the project that will you create in Android Studio. registerAdapter ( 'firebase equalTo(itemText. But now I’m stuck at this. public MediaQueueItem getItem (int position) Returns the MediaQueueItem at a given position in the queue. ViewHolder in the given RecyclerView. The Overflow Blog Level Up: Creative coding with p5. Step 6 : Creating our Adapter Class (a). paging:runtime:1 public FirebaseRecyclerAdapter (Query query, Class< T > itemClass) {this (query, itemClass, null, null);} /** * @param query The Firebase location to watch for data changes. widget. We have two ArrayList in our Adapter. class, R. Effortlessly scale to support millions of users with Firebase databases, machine learning infrastructure, hosting and storage solutions, and Cloud Functions. The error is in the following line in which theres a red line showing under (): FirebaseRecyclerAdapter<AllUsers, UsersViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<AllUsers, UsersViewHolder> () {. With orderBy we can order the items in this query by a field in ascending or descending order. This Project will basically fetch / retrive data from firebase using Firebase UI recyclerview adapter library and display it’s contents in recyclerview as a GridView. gms. Viewed 23k extends RecyclerView. The process of associating views to their data is called binding. setQuery(query, Post. getInstance(). These examples are extracted from open source projects. When you define your adapter, you need to override three key methods: onCreateViewHolder(): RecyclerView calls this method whenever it needs to create a new ViewHolder. I have firebase (realtime database) simple structure like this: Listing all items in view: <ion-list> <ion-item *ngFor="let item of arrData; let i = index" (click)="delete(item)"&gt; Retrieving Data From Firebase Database. When it runs, logcat is telling me "E/RecyclerView: No adapter attached; skipping layout. Why need empty query/empty recycler view? I already loaded RecyclerView with Query data when user signin, then I need to empty/clear the RecyclerView when user signout. Cloud Firestore helps us store data in the cloud. setAdapter(adapter); progressDialog. gradle file Way to display List of Data in an Android App with FirebaseUI FirebaseRecyclerAdapter. Here, we use item click and custom dialog box, also we use update and delete query of firebase. databaseReference. child("posts"). com FirebaseUI offers two types of RecyclerView adapters for Cloud Firestore: FirestoreRecyclerAdapter — binds a Query to a RecyclerView and responds to all real-time events included items being added, removed, moved, or changed. endAt(searchText + "\uf8ff"); //set Options FirebaseRecyclerOptions<Users> options = new FirebaseRecyclerOptions. The select method allows us select all data from our Firebase Realtime database. hide (); viewHolder. Adapter} that listens to a Firebase query. firebase. In this class we will create a ViewHolder and override onCreateViewHolder, onBindViewHolder and getItemCount. apply plugin: 'com. To retry items loading in RecyclerView, retry () method from Adapter class is used. Because the array can change even though the adapter isn’t listening for updates, FUI has to clear the adapter. To read data from firebase, we need to attach a ChildEventListener to our database reference. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. So we need to implement ViewHolder as a LifecycleOwner. Build powerful apps. How to use Firebase List adapter. orderByKey() . For creating an Adapter class for our Recycler View, navigate to the app > java > Your app’s package name > Right-click on it and Click > New > Java class and name your class as CourseRVAdapter. Before using this adapter in your app, you will have to implement dependency on the support library. Get code examples like "android studio example recycler view" instantly right from your google search results with the Grepper Chrome Extension. setItemChecked(selectedPosition, false); itemSelected = false; deleteButton. getReference(); DatabaseReference ref2; ref2 = ref1. For the latter approach, it is common to have a inverted timestamp. public FirebaseListAdapter(Activity activity, java. implementation 'android. Firebase Recycler Adapter not working with recycler view of children , I have used Firebase Recycler Adapter to the info for S1, S2 and so on, to represent that data in a recycler view. private void firebaseUserSearch(String searchText) { /*Toast. FirebaseRecyclerOptions<Post> options = new FirebaseRecyclerOptions. Rajat Feel free to contact us @ below Email We will sure reply your query with-in 2 - 6 hours Have read statements from Firebase team members here stating that this is a matter of technical debt, not policy. cert (serviceAccount) }); const db = admin. Key; account. 🔌 Pyrebase - A simple python wrapper for the Firebase API. * Initialize a {@link RecyclerView. google. firebase:firebase-ads:10. You need to call collection after creating a firestore instance. paypal. dismiss(); } @Override public void onCancelled(DatabaseError databaseError Step 2: Connect your app to Firebase . lang. js – part 3 Welcome! This article helps you in understanding to implement RecyclerView using data available in Cloud Firestore in No-SQL form of collections and documents. Cloud Firestore belongs to Firebase, you can read more about firestore before you begin. See * {@link FirebaseRecyclerOptions} for configuration options. January 27, 2017, at 08:49 AM. Builder<Post>(). * Initialize a {@link RecyclerView. fireeats; In the Authentication tab of the Firebase console go to the Sign-in Method page and enable 'Email/Password'. The code adds the items to Firebase with no problems, but it appears that the recyclerView cannot reflect what is in the Firebase Database. The following examples show how to use com. child The adapter is the main code responsible for RecyclerView. Builder<Users>() . Add a field that has a descending value to the data. 5HP GTS 22IN RECYCLER LAWNMOWER Carb TECUMSEH Engine,For TORO 6. setVisibility(View. It marshals received data into the given class type. database () }); // Use DataStore instead of Container in the browser import { DataStore } from 'js-data' ; import adapter from '. * Can also be a slice of a location, using some combination of * < code >limit()</code>, < code >startAt()</code>, and < code >endAt()</code>. Android is the most used operating system on the planet. - Kotlin Firebase list data FirebaseRecyclerAdapter - Kotlin FirebaseUI Database - Kotlin FirebaseRecyclerAdapter example This class is a generic way of backing an Android ListView with a Firebase location. database. arch. firebase recycler adapter with multiple views. class). The basic methods for a successful implementation are: onCreateViewHolder, onBindViewHolder, getItemCount. Issues here are answered by maintainers and other community members on GitHub on a best-effort basis. addListenerForSingleValueEvent(queryValueListener); } Use the package name com. The Adapter creates ViewHolder objects as needed, and also sets the data for those views. layout. lang. For LiveData to work, we need to call binding. We can use FirestoreRecyclerAdapter (from FirebaseUI-Android library) for easy implementation of the population of Firestore. child(Consts. Use a Firebase query to get the correct data, then re-order it client-side. firebase. How to use FirebaseRecyclerAdapter. setLifecycleOwner(this) . firebase. FirebaseRecyclerAdapter. Ask Question Asked 4 years, 3 months ago. keepSynced(true); adapter = new FirebaseRecyclerAdapter<Reminder Trouble displaying Recyclerview with firebase December 31, 2020 android , android-layout , android-recyclerview , firebase I am having trouble displaying my RecyclerView . Discover Firebase Integrate Firebase into an Android app Create your first authentication system Improve your authentication system with social media Implement account management for the user Quiz: Test your knowledge Create your first data structure Improve user management with Firestore Implement a chat room Send messages in the chat room Quiz: Test your knowledge Get a local image on the We will be able to sign up and login users, store their details, posts and photos in Firebase. * Returns the list of items of the adapter: can be useful when dealing with a configuration FirebaseUI offers two types of RecyclerView adapters for the Realtime Database: FirebaseRecyclerAdapter — binds a Query to a RecyclerView and responds to all real-time events included items being FirebasePagingRecyclerAdapter — binds a Query to a RecyclerView by loading data in pages. 📹 Firebase Summit 2020 - All Firebase talks @ the Firebase Summit 2020. uid = item. lang. Hi there, Welcome to Full Android Course with 14 Real Apps - 42 Hours course. limitToFirst(mPostsPerPage); else query = FirebaseDatabase. class) . class); list. firebase. Depedencies. database. When documents are added, Firebase list adapter. Class<T> modelClass, int modelLayout, java. limitToFirst(mPostsPerPage); query. email; list_users. Object. This Adapter binds a Query to a RecyclerView. getReference(). show();*/ progressBar. gradle file dependencies { //Firebase Ads Dependency compile 'com. client. retry () should not be invoked anytime other than ERROR state. Class<VH> viewHolderClass, com. setLifecycleOwner but RecyclerView is not a LifecycleOwner. */ Creating an infallible adapter. getInstance(). com/edmtdevLink JSON DB : http://linkshrink. Object. " I have searched SO and TCP and the net and the answers tell me that I need to set adapter and the linear layout manager. For queries constructed while offline, the Firebase Realtime Database continues to work for previously loaded data. android - アニメーション付きのAndroid Recyclerビューアダプターフィルター 原文 android android-recyclerview recycler-adapter android-filterable AndroidのRecyclerView Adapterのフィルター方法を最適化しようとしています。 Carburetor Parts For TORO 6. This is our recyclerview adapter class. In this article, we will add onClickListener() inside that Adapter class for RecyclerView item click listener. They have guides that tell you exactly how to upload files and setup your firebase app. Source of the Image. I am trying to create my own custom firebase recycler adapter for a chat app. Jan 12, 2016 · Like ListView, RecyclerView uses an adapter to supply its views, but it works a little differently (also note that it’s RecyclerView. Class<T> modelClass, int modelLayout, com. 688. google. database. Run the app on an Android device or emulator. getInstance(). After creating a new project navigate to the Tools option on the top bar. getReference() . If the requested data hasn't loaded, the Firebase Realtime Database loads data from the local cache. See full list on github. setText("Find"); query = dbRef. The process of associating views to their data is called binding. Use the following command to delete data: firebase firestore:delete [options] <<path>> Delete data with the console. build(); adapter = new In part 5 of the Firebase Storage tutorial, we create the adapter class for our RecyclerView. val query: Query = FirebaseFirestore. NotifyDataSetChanged(); list_data. json'); admin. Cloud Firestore helps us store data in the cloud. makeText(AllUserActivity. In the "firends" collection, add some documents with some field (name, image, title, company) in the each documents. You can find guides on how to do this on the Firebase website. getReference () in the adapter and passing the position to it. Adapter<VH> implements FirebaseAdapter<T> {. Adapter = adapter; 1)First connect to your firebase database. google. this, list); recyclerView. I have this following node in the database, I am confused how the class should look like for this kind of data My goal is to display username and userID in the recycler view, how can I set some functions to upload pictures on Firebase Storage, the problem is that the average size is 2 MB or more. Then later that ArrayList will used as the data source for our recyclerview adapter. Android data binding library provide mechanism for us to bind the data in the Android layout, and it allows us to remove all the boilerplate findViewById() codes as well as having to manually update those views in the code. After this, you can observe the change in RecyclerView. Using recycler view we can show grids and list of items. AndroidVersion object is passed as an array in ArrayList as a constructor. Firebase Recycler View crashes on clicking button to remove item from the list. google. The Overflow Blog Level Up: Creative coding with p5. Add the following code snippet to the CourseRVAdapter. firebase. Query; Overview; auth:import and auth:export; Firebase Realtime Database Operation Types; Deploy Targets; Cloud Firestore Index Definition Format; Emulator Suite UI Log Query Syntax – add Firebase to Android App & enable Firebase Auth – use Firebase Cloud Storage to upload and store images – use Firebase Realtime Database to store images’ information (name + url) – use FirebaseRecyclerAdapter to display images in RecyclerView with the help of Picasso lib. Our two most important methods above are the search adn select. WARNING : Master branch is the work in progress for version 3 of Emberfire. Add(account); } adapter = new ListViewAdapter(this, list_users); adapter. In this video tutorial we will Display Chat Requests using firebase recycler adapter with firebase recyclerview in fragments using android studio for our and In part 4 of the FirebaseUI Firestore tutorial, we will add another activity to our app, from which the user can add a new document to the Firestore database. Then we create an adapter class that extends the recycler view. Here is complete code for This is an android development course designed to take someone who is comfortable with Android to a higher grade! I The advanced topics covered include complex recycler-views, Google APIs, flavors, an event bus, view pagers, and most importantly a back-end service called Firebase. Deleting a document from the console The Firebase Realtime Database stores data returned from a query for use when offline. setHasFixedSize (true); my_recycler_view. The following examples show how to use com. That will then listen to changes in the data nodes. Comments are added in the code to know in more detail. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. It handles all of the child events at the given Firebase location. initializeApp ( { credential: admin. Create a Recycler View with Firebase Realtime Database create an adapter class instance and set that adapter on recycler view. firebase. This class is a generic way of backing an Android ListView with a Firebase location. startAt(nodeId) . 2) [code] DatabaseReference ref1= FirebaseDatabase. Security Rules. If the adapter has previously been set, all we need to do next is figure out whats been added/deleted/updated given the new list and comparing against the list kept by the adapter; notifying the The Adapter creates ViewHolder objects as needed, and also sets the data for those views. Load only x items in Firebase Recycler Adapter Answer 10/19/2018 Developer FAQ 2 Hi so I have one Firebase FirebaseRecyclerAdapter and in my Firebase project in my database I have over 30 values and in my app I want to display only the first x items. orderByKey() . -1 * new Date(). setLayoutManager (new This is one type of RecyclerView adapters offered by the FirebaseUI for Firestore. This app uses FirebaseUI for authentication. setQuery(firebaseSearchQuery, Users. java file. One is the original ArrayList that is passed via the constructor. This example demonstrate about how to update Recycler View adapter by creating a beautiful student records app that displays student name with age. MyAdapter. These examples are extracted from open source projects. Android Firestore Query in Kotlin Coroutines (Async without Callback) Snap RecyclerView: Center Target Child View or ViewPager Full View Display Android Horizontal Scrolling RecyclerView FirebaseRecyclerPagingation Library binds Firebase Realtime Database Query to a RecyclerView by loading Data in pages. Create a Firebase Project here. 5HP GTS 22IN RECYCLER LAWNMOWER Carb TECUMSEH Engine Carburetor Parts,75HP Yard Machine Engine, Replace Part Number : For Tecumseh 640350 640303 640271, For TORO 20016 20017 20018, 1x Carburetor,For Tecumseh LV195EA LEV100 . The following examples show how to use com. getSnapshot (). Go to Database menu and choose Cloud Firestore. Read more As we have created our Adapter class in the previous article for displaying the list of courses in Recycler View. Learn how to create a messaging app like Discord or Slack using Firebase! Firebase is one of the most popular mobile development platforms out there that helps you implement authentication and a realtime database for your apps. getInstance(). getText(). email = item. However the data is not Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. If you missed the online event - or if you simply want a refresher - here's a recap of everything we announced plus highlights of our recent launches. Adapter class. Our Adapter implements a Filterable interface, and we should override the getFilter() method. FirebaseRecyclerOptions. client. FIREBASE_DATABASE_LOCATION_USERS) . We just wrapped up our virtual Firebase Summit 2020, which included a keynote, technical sessions, and hands on learning materials. Adapter. Or I can create a blank RecyclerView. Comments are added inside the code to understand the code in more detail. You can also use the Firebase CLI to delete documents and collections. For creating a new Adapter class navigate to the app > java > your app’s package name > Right-click on it and Click on New > Java class and name your java class as AdapterCard and add the below code to it. Now that your data isn’t reloaded on activity start, there’s just one problem left to solve: restoring the user’s scroll position. firestore (); Delete data with the Firebase CLI. firebase recycler adapter query