Created
January 11, 2017 23:42
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| /** | |
| * @Author McGalanes | |
| * @Email melwin.magalhaes@gmail.com | |
| */ | |
| public class LoadMoreAdapter extends RecyclerView.Adapter { | |
| private final int VIEW_ITEM = 1; | |
| private final int VIEW_PROG = 0; | |
| private List<City> mCityList; | |
| // The minimum amount of items to have below your current scroll position | |
| // before mLoading more. | |
| private int mVisibleThreshold = 5; | |
| private int mLastVisibleItem, mTotalItemCount; | |
| private boolean mLoading; | |
| private OnLoadMoreListener mOnLoadMoreListener; | |
| public LoadMoreAdapter(List<City> students, RecyclerView recyclerView) { | |
| mCityList = students; | |
| if (recyclerView.getLayoutManager() instanceof LinearLayoutManager) { | |
| final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView | |
| .getLayoutManager(); | |
| recyclerView | |
| .addOnScrollListener(new RecyclerView.OnScrollListener() { | |
| @Override | |
| public void onScrolled(RecyclerView recyclerView, | |
| int dx, int dy) { | |
| super.onScrolled(recyclerView, dx, dy); | |
| mTotalItemCount = linearLayoutManager.getItemCount(); | |
| mLastVisibleItem = linearLayoutManager | |
| .findLastVisibleItemPosition(); | |
| if (!mLoading | |
| && mTotalItemCount <= (mLastVisibleItem + mVisibleThreshold)) { | |
| // End has been reached | |
| // Do something | |
| if (mOnLoadMoreListener != null) { | |
| mOnLoadMoreListener.onLoadMore(); | |
| } | |
| mLoading = true; | |
| } | |
| } | |
| }); | |
| } | |
| } | |
| @Override | |
| public int getItemViewType(int position) { | |
| return mCityList.get(position) != null ? VIEW_ITEM : VIEW_PROG; | |
| } | |
| @Override | |
| public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, | |
| int viewType) { | |
| RecyclerView.ViewHolder vh; | |
| if (viewType == VIEW_ITEM) { | |
| View v = LayoutInflater.from(parent.getContext()).inflate( | |
| R.layout.cell_item, parent, false); | |
| vh = new CityViewHolder(v); | |
| } else { | |
| View v = LayoutInflater.from(parent.getContext()).inflate( | |
| R.layout.cell_loader, parent, false); | |
| vh = new ProgressViewHolder(v); | |
| } | |
| return vh; | |
| } | |
| @Override | |
| public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { | |
| if (holder instanceof CityViewHolder) { | |
| City singleCity = mCityList.get(position); | |
| CityViewHolder.bind(singleCity); | |
| } else { | |
| ((ProgressViewHolder) holder).mProgressBar.setIndeterminate(true); | |
| } | |
| } | |
| public void setLoaded() { | |
| mLoading = false; | |
| } | |
| @Override | |
| public int getItemCount() { | |
| return mCityList.size(); | |
| } | |
| public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) { | |
| this.mOnLoadMoreListener = onLoadMoreListener; | |
| } | |
| public static class CityViewHolder extends RecyclerView.ViewHolder { | |
| public CityViewHolder(View itemView) { | |
| super(itemView); | |
| //inject views here | |
| } | |
| public static void bind(City singleCity) { | |
| //update views here | |
| } | |
| } | |
| public static class ProgressViewHolder extends RecyclerView.ViewHolder { | |
| public ProgressBar mProgressBar; | |
| public ProgressViewHolder(View v) { | |
| super(v); | |
| mProgressBar = (ProgressBar) v.findViewById(R.id.progressbar_id); | |
| } | |
| } | |
| public interface OnLoadMoreListener { | |
| void onLoadMore(); | |
| } | |
| } |
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