How to load more data in recycler view from server?

Question

I have a recycler view in which I load some data from the server when user scroll to bottom I want to show a progress bar and send another request to the server for more dat

Answer 1

Use Below Code:

First Declare these global variables:

int visibleItemCount, totalItemCount = 1;
int firstVisiblesItems = 0;
int totalPages = 1; // get your total pages from web service first response
int current_page = 0;

boolean canLoadMoreData = true; // make this variable false while your web service call is going on.

LinearLayoutManager linearLayoutManager;

Assign Layout manager to your Recyclerview:

linearLayoutManager = new LinearLayoutManager(mActivity);
mRecyclerView.setLayoutManager(linearLayoutManager);

Scroll Listener of your recyclerview:

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            if (dy > 0) //check for scroll down
            {
                visibleItemCount = linearLayoutManager.getChildCount();
                totalItemCount = linearLayoutManager.getItemCount();
                firstVisiblesItems = linearLayoutManager.findFirstVisibleItemPosition();

                    if (canLoadMoreData) {
                        if ((visibleItemCount + firstVisiblesItems) >= totalItemCount) {
                            if (current_page < totalPages) {
                                canLoadMoreData  = false;
                                /**
                                 * .
                                 * .
                                 * .
                                 * .call your webservice with page index
                                 * .
                                 * .
                                 *
                                 */
                                //After completion of web service make 'canLoadMoreData = true'
                            }
                        }
                    }

            }
        }
    });