PatilShreyas

public class Post {
    public String authorName;
    public String message;

    public Post() {
    }

    public Post(String authorName, String message) {
        this.authorName = authorName;
        this.message = message;

PatilShreyas

// Init Paging Configuration
PagedList.Config config = new PagedList.Config.Builder()
        .setEnablePlaceholders(false)
        .setPrefetchDistance(2)
        .setPageSize(10)
        .build();

PatilShreyas

 // Init Adapter Configuration
FirestorePagingOptions options = new FirestorePagingOptions.Builder<Post>()
        .setLifecycleOwner(this)
        .setQuery(mQuery, config, Post.class)
        .build();

PatilShreyas

// Instantiate Paging Adapter
mAdapter = new FirestorePagingAdapter<Post, PostViewHolder>(options) {
    @NonNull
    @Override
    public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = getLayoutInflater().inflate(R.layout.item_post, parent, false);
        return new PostViewHolder(view);
    }

    @Override

PatilShreyas

// Instantiate Paging Adapter
mAdapter = object : FirestorePagingAdapter<Post, PostViewHolder>(options) {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PostViewHolder {
        val view = layoutInflater.inflate(R.layout.item_post, parent, false)
        return PostViewHolder(view)
    }

    override fun onBindViewHolder(viewHolder: PostViewHolder, position: Int, post: Post) {
        // Bind to ViewHolder
        viewHolder.bind(post)

PatilShreyas

@Override
protected void onError(@NonNull Exception e) {
    super.onError(e);
    Log.e("MainActivity", e.getMessage());
    
    // Handle the error.
}

PatilShreyas

// Refresh Action on Swipe Refresh Layout
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        mAdapter.refresh();
    }
});

PatilShreyas

@Override
protected void onStart() {
    super.onStart();
    mAdapter.startListening();
}

PatilShreyas

@Override
protected void onStop() {
    super.onStop();
    mAdapter.stopListening();
}

PatilShreyas

public class PostViewHolder extends RecyclerView.ViewHolder {

    private TextView authorView;
    private TextView messageView;

    public PostViewHolder(@NonNull View itemView) {
        super(itemView);
        authorView = itemView.findViewById(R.id.post_AuthorName);
        messageView = itemView.findViewById(R.id.post_Message);
    }