I have implemented an EndlessScroll
for RecyclerView
(Only Images in it) or we can say Pagination
but after implementing it I don't know why the images are not loading up from Firebase
So I tried to include a placeholder image from my adapter class but the default placeholder image is not showng up too
BTW before asking this SO Q I asked a Q to how to implement Pagination with StaggeredGridLayoutManager but after implementing the answer to my Orignal question there are no errors but the images are showing up This is the Question link for reference on how I implemented the pagination in my recycler view - How to implement endless scroll (pagination) in recyclerview with StaggeredGridLayoutManager
Here is the code
Home_Fragment.java // for those who are referencing my original question which I put a link above,this is a different fragment than my original question in the original question I have included Profile_Fragment.java, but because that file is much longer,I have included this because it has less code compared to the orignal
private boolean loading = true;
private int pastVisibleItems, visibleItemCount, totalItemCount;
@SuppressLint("SourceLockedOrientationActivity")
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
requireActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
MaterialToolbar materialToolbar = view.findViewById(R.id.toolbar);
materialToolbar.setOnMenuItemClickListener(toolbarItemClickListener);
postRecyclerView = view.findViewById(R.id.recyclerViewHome);
// shimmerFrameLayout = view.findViewById(R.id.shimmerEffect);
// this is for one item per scroll
// SnapHelper snapHelper = new PagerSnapHelper();
// snapHelper.attachToRecyclerView(verticalRecyclerView);
postRecyclerView.setAdapter(postsAdapter);
StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.VERTICAL);
postRecyclerView.setLayoutManager(
staggeredGridLayoutManager // I have 3 rows
);
postRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
visibleItemCount = staggeredGridLayoutManager.getChildCount();
totalItemCount = staggeredGridLayoutManager.getItemCount();
int[] firstVisibleItems = null;
firstVisibleItems = staggeredGridLayoutManager.findFirstVisibleItemPositions(firstVisibleItems);
if (firstVisibleItems != null && firstVisibleItems.length > 0) {
pastVisibleItems = firstVisibleItems[0];
}
if (loading) {
if ((visibleItemCount + pastVisibleItems) >= totalItemCount) {
loading = false;
getData();
}
}
}
});
// setupFirebaseAuth();
// shimmerFrameLayout.startShimmer();
mUploads = new ArrayList<>();
postsAdapter = new PostAdapter_Home(getContext(), mUploads);
postRecyclerView.setAdapter(postsAdapter);
postRecyclerView.scrollToPosition(Home_Fragment.saved_position);
return view;
}
private void getData() {
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot snapshot) {
if (snapshot.exists()) {
// shimmerFrameLayout.stopShimmer();
// shimmerFrameLayout.setVisibility(View.GONE);
postRecyclerView.setVisibility(View.VISIBLE);
mUploads.clear();
for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
Upload upload = dataSnapshot.getValue(Upload.class);
assert upload != null;
upload.setmKey(dataSnapshot.getKey());
mUploads.add(upload);
}
}
//notify the adapter
postsAdapter.notifyDataSetChanged();
loading = true;
}
@Override
public void onCancelled(@NonNull DatabaseError error) {
loading = true;
}
});
}
from Images are not showing up (loading) in recyclerview after implementing Endless scroll (Pagination)
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