PatilShreyas

public class Post {
    public String title;
    public String body;

    public Post(){}

    public Post(String title, String body) {
        this.title = title;
        this.body = body;
    }

PatilShreyas

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private DatabaseReference mDatabase;

    private SwipeRefreshLayout mSwipeRefreshLayout;

    FirebaseRecyclerPagingAdapter<Post, PostViewHolder> mAdapter;

PatilShreyas

       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);

           mSwipeRefreshLayout = findViewById(R.id.swipe_refresh_layout);
 
           //Initialize RecyclerView
           mRecyclerView = findViewById(R.id.recycler_view);
           mRecyclerView.setHasFixedSize(true);

PatilShreyas

 PagedList.Config config = new PagedList.Config.Builder()
                .setEnablePlaceholders(false)
                .setPrefetchDistance(5)
                .setPageSize(10)
                .build();

PatilShreyas

DatabasePagingOptions<Post> options = new DatabasePagingOptions.Builder<Post>()
                .setLifecycleOwner(this)
                .setQuery(mDatabase, config, Post.class)
                .build();

PatilShreyas

        mAdapter = new FirebaseRecyclerPagingAdapter<Post, PostViewHolder>(options) {
            @NonNull
            @Override
            public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
                return new PostViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list, parent, false));
            }

            @Override
            protected void onBindViewHolder(@NonNull PostViewHolder holder,
                                         int position,

PatilShreyas

      @Override
      protected void onBindViewHolder(@NonNull PostViewHolder holder,
                                   int position,
                                   @NonNull Post model) {

          DatabaseReference reference = getRef(position);
      }

PatilShreyas

      @Override
      protected void onError(@NonNull DatabaseError databaseError) {
          mSwipeRefreshLayout.setRefreshing(false);
          databaseError.toException().printStackTrace();
          // Handle Error

      }

PatilShreyas

        @Override
        protected void onError(@NonNull DatabaseError databaseError) {
            retry();          
        }

PatilShreyas

        mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                mAdapter.refresh();
            }
        });