PAGINATION IN RECYCLERVIEW

Hello, Here is a simple pagination tutorial in recyclerview.

Step 1 : -  Create a recycler view and its adapter, In my case i have created a custom adapter in order to show user's profile image.

Step 2 : - Add  onscrollchange listener on your recycler view and put your login in this method.

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);

            if(dy > 0) //check for scroll down
            {
                visibleItemCount = mLayoutManager.getChildCount();
                totalItemCount = mLayoutManager.getItemCount();
                pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition();

                if (loading)
                {
                    if ( (visibleItemCount + pastVisiblesItems) >= totalItemCount)
                    {
                        loading = false;
                        Log.e(TAG, "Last Item Wow !");
                        loadData();
                    }
                }
            }


        }
    });

}

Step 3 : - Call your api and on success or failure make the loading flag true so that it could work on second call.

pd.setMessage("loading next 10 questions.");
if(pd != null && !pd.isShowing())
    pd.show();
new Thread(new Runnable() {
    @Override
    public void run() {
        for (int i = lastcount; i<lastcount+threshold; i++){
        }
        try {
            new ApiManager().getQuestions(MainActivity.this, "10", new ApiListener() {
                @Override
                public void onCallSuccess(QuesitonBean quesitonBean) {
                    if(pd != null && pd.isShowing())
                        pd.dismiss();
                    Log.e(TAG, "Success"+quesitonBean.getItems().size());
                    for (int i = 0; i < quesitonBean.getItems().size(); i++) {
                        list_items.add(quesitonBean.getItems().get(i));
                        adapter.notifyDataSetChanged();
                        loading = true;
                    }
                }

                @Override
                public void onError() {
                    if(pd != null && pd.isShowing())
                        pd.dismiss();

                    loading = true;
                    Log.e(TAG, "error");
                }
            });
            showProgress(true);
            Thread.sleep(2000);
            showProgress(false);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
}).start();

This is it, now you are done with pagination, run the app and feel delighted.

Here is a simple demo code for the above tutorial.

happy coding :)