Examples with QuerySnapshot com.google.firebase.firestore.QuerySnapshot used on opensource projects

Example 1 with QuerySnapshot

use of com.google.firebase.firestore.QuerySnapshot in project PhotoBlog-Android-Blog-App by akshayejh.

the class HomeFragment method loadMorePost.

public void loadMorePost() {
    if (firebaseAuth.getCurrentUser() != null) {
        Query nextQuery = firebaseFirestore.collection("Posts").orderBy("timestamp", Query.Direction.DESCENDING).startAfter(lastVisible).limit(3);
        nextQuery.addSnapshotListener(getActivity(), new EventListener<QuerySnapshot>() {

            @Override
            public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
                if (!documentSnapshots.isEmpty()) {
                    lastVisible = documentSnapshots.getDocuments().get(documentSnapshots.size() - 1);
                    for (DocumentChange doc : documentSnapshots.getDocumentChanges()) {
                        if (doc.getType() == DocumentChange.Type.ADDED) {
                            String blogPostId = doc.getDocument().getId();
                            BlogPost blogPost = doc.getDocument().toObject(BlogPost.class).withId(blogPostId);
                            blog_list.add(blogPost);
                            blogRecyclerAdapter.notifyDataSetChanged();
                        }
                    }
                }
            }
        });
    }
}

Example 2 with QuerySnapshot

use of com.google.firebase.firestore.QuerySnapshot in project PhotoBlog-Android-Blog-App by akshayejh.

the class BlogRecyclerAdapter method onBindViewHolder.

@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
    holder.setIsRecyclable(false);
    final String blogPostId = blog_list.get(position).BlogPostId;
    final String currentUserId = firebaseAuth.getCurrentUser().getUid();
    String desc_data = blog_list.get(position).getDesc();
    holder.setDescText(desc_data);
    String image_url = blog_list.get(position).getImage_url();
    String thumbUri = blog_list.get(position).getImage_thumb();
    holder.setBlogImage(image_url, thumbUri);
    String user_id = blog_list.get(position).getUser_id();
    // User Data will be retrieved here...
    firebaseFirestore.collection("Users").document(user_id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {

        @Override
        public void onComplete(@NonNull Task<DocumentSnapshot> task) {
            if (task.isSuccessful()) {
                String userName = task.getResult().getString("name");
                String userImage = task.getResult().getString("image");
                holder.setUserData(userName, userImage);
            } else {
            // Firebase Exception
            }
        }
    });
    try {
        long millisecond = blog_list.get(position).getTimestamp().getTime();
        String dateString = DateFormat.format("MM/dd/yyyy", new Date(millisecond)).toString();
        holder.setTime(dateString);
    } catch (Exception e) {
        Toast.makeText(context, "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
    }
    // Get Likes Count
    firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").addSnapshotListener(new EventListener<QuerySnapshot>() {

        @Override
        public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
            if (!documentSnapshots.isEmpty()) {
                int count = documentSnapshots.size();
                holder.updateLikesCount(count);
            } else {
                holder.updateLikesCount(0);
            }
        }
    });
    // Get Likes
    firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).addSnapshotListener(new EventListener<DocumentSnapshot>() {

        @Override
        public void onEvent(DocumentSnapshot documentSnapshot, FirebaseFirestoreException e) {
            if (documentSnapshot.exists()) {
                holder.blogLikeBtn.setImageDrawable(context.getDrawable(R.mipmap.action_like_accent));
            } else {
                holder.blogLikeBtn.setImageDrawable(context.getDrawable(R.mipmap.action_like_gray));
            }
        }
    });
    // Likes Feature
    holder.blogLikeBtn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {

                @Override
                public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                    if (!task.getResult().exists()) {
                        Map<String, Object> likesMap = new HashMap<>();
                        likesMap.put("timestamp", FieldValue.serverTimestamp());
                        firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).set(likesMap);
                    } else {
                        firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).delete();
                    }
                }
            });
        }
    });
    holder.blogCommentBtn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent commentIntent = new Intent(context, CommentsActivity.class);
            commentIntent.putExtra("blog_post_id", blogPostId);
            context.startActivity(commentIntent);
        }
    });
}

Example 3 with QuerySnapshot

use of com.google.firebase.firestore.QuerySnapshot in project PhotoBlog-Android-Blog-App by akshayejh.

the class HomeFragment method onCreateView.

@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_home, container, false);
    blog_list = new ArrayList<>();
    blog_list_view = view.findViewById(R.id.blog_list_view);
    firebaseAuth = FirebaseAuth.getInstance();
    blogRecyclerAdapter = new BlogRecyclerAdapter(blog_list);
    blog_list_view.setLayoutManager(new LinearLayoutManager(container.getContext()));
    blog_list_view.setAdapter(blogRecyclerAdapter);
    blog_list_view.setHasFixedSize(true);
    if (firebaseAuth.getCurrentUser() != null) {
        firebaseFirestore = FirebaseFirestore.getInstance();
        blog_list_view.addOnScrollListener(new RecyclerView.OnScrollListener() {

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                Boolean reachedBottom = !recyclerView.canScrollVertically(1);
                if (reachedBottom) {
                    loadMorePost();
                }
            }
        });
        Query firstQuery = firebaseFirestore.collection("Posts").orderBy("timestamp", Query.Direction.DESCENDING).limit(3);
        firstQuery.addSnapshotListener(getActivity(), new EventListener<QuerySnapshot>() {

            @Override
            public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
                if (!documentSnapshots.isEmpty()) {
                    if (isFirstPageFirstLoad) {
                        lastVisible = documentSnapshots.getDocuments().get(documentSnapshots.size() - 1);
                        blog_list.clear();
                    }
                    for (DocumentChange doc : documentSnapshots.getDocumentChanges()) {
                        if (doc.getType() == DocumentChange.Type.ADDED) {
                            String blogPostId = doc.getDocument().getId();
                            BlogPost blogPost = doc.getDocument().toObject(BlogPost.class).withId(blogPostId);
                            if (isFirstPageFirstLoad) {
                                blog_list.add(blogPost);
                            } else {
                                blog_list.add(0, blogPost);
                            }
                            blogRecyclerAdapter.notifyDataSetChanged();
                        }
                    }
                    isFirstPageFirstLoad = false;
                }
            }
        });
    }
    // Inflate the layout for this fragment
    return view;
}

Example 4 with QuerySnapshot

use of com.google.firebase.firestore.QuerySnapshot in project FirebaseUI-Android by firebase.

the class FirestorePagingSource method loadSingle.

@NonNull
@Override
public Single<LoadResult<PageKey, DocumentSnapshot>> loadSingle(@NonNull LoadParams<PageKey> params) {
    final Task<QuerySnapshot> task;
    if (params.getKey() == null) {
        task = mQuery.limit(params.getLoadSize()).get(mSource);
    } else {
        task = params.getKey().getPageQuery(mQuery, params.getLoadSize()).get(mSource);
    }
    return Single.fromCallable(() -> {
        Tasks.await(task);
        if (task.isSuccessful()) {
            QuerySnapshot snapshot = task.getResult();
            PageKey nextPage = getNextPageKey(snapshot);
            if (snapshot.getDocuments().isEmpty()) {
                return toLoadResult(snapshot.getDocuments(), null);
            }
            return toLoadResult(snapshot.getDocuments(), nextPage);
        }
        throw task.getException();
    }).subscribeOn(Schedulers.io()).onErrorReturn(throwable -> new LoadResult.Error<>(throwable));
}