nested scrollview inside recyclerview not triggering onscrolllistener when scrolling down
android, android-recyclerview
Solution
If it is lazy loading you want then have a look at my `RecyclerAdapter`
@Override
public void onBindViewHolder(VH viewHolder, final int position) {
// Set Data to Views
if(position == count) {
// When last item is reached.
if (onLoadMoreListener != null) {;
onLoadMoreListener.onLoadMore();
}
}
}
I think this is easier and fairly inexpensive way to achieve lazy loading.
Problem
Edit: I have loading more than 200 datas from webservice.When I am scrolling down the recyclerview, it is not triggering the scrollLisener. Because, if I'm not used dy>0 condition, it is loading all next 20 datas, 20 datas and so on, initially when coming to this activity. Below I have posted the code relevant to that. Logcat: ``` E/dy: 0 ``` Activity code: ``` recyclerView = (RecyclerView) findViewById(R.id.rv_list_tab_home_recycler); recyclerView.setHasFixedSize(true); mLayoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(mLayoutManager); //homePostitemsAdapter = new UserPostAdapter(TabHomeActivity.this, homePostItemsList); homePostitemsAdapter = new TabHomeAdapter(homePostItemsList, recyclerView); // recyclerView.setItemAnimator(new DefaultItemAnimator()); recyclerView.setAdapter(homePostitemsAdapter); recyclerView.setNestedScrollingEnabled(false); ``` Adapter Code: ``` private int visibleThreshold = 5; private int lastVisibleItem, totalItemCount; private boolean loading; private OnLoadMoreListener onLoadMoreListener; public TabHomeAdapter(List<HomePostItems> objects, RecyclerView recycle) { homePostArrListItems = objects; if (recycle.getLayoutManager() instanceof LinearLayoutManager) { final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recycle .getLayoutManager(); Log.e("LinearLayoutManager", "Test"); recycle.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); totalItemCount = linearLayoutManager.getItemCount(); lastVisibleItem = linearLayoutManager .findLastVisibleItemPosition(); Log.e("dy", ""+dy); if (!loading && totalItemCount <= (lastVisibleItem + visibleThreshold ) && dy > 0) { // End has been reached // Do something Log.e("totalItemCount", ""+totalItemCount); Log.e("lastVisibleItem", ""+lastVisibleItem); Log.e("visibleThreshold", ""+visibleThreshold); Log.e("loading", ""+loading); Log.e("onLoadMoreListener", ""+onLoadMoreListener); if (onLoadMoreListener != null) {; onLoadMoreListener.onLoadMore(); } loading = true; } } }); } public void setLoaded() { loading = false; } @Override public int getItemCount() { return homePostArrListItems.size(); } public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) { this.onLoadMoreListener = onLoadMoreListener; } public static class ProgressViewHolder extends RecyclerView.ViewHolder { public ProgressBar progressBar; public ProgressViewHolder(View v) { super(v); progressBar = (ProgressBar) v.findViewById(R.id.progressBar1); } } } ``` When I initially came to this activity, I am getting dy as 0. When I'm scrolling the `RecyclerView` , dy is not triggering in `LogCat`. I think because of the `NestedScrollView` it is not working.But I need nested scroll view because I need to scroll down some views before `RecyclerView`.