RecyclerView与SwipReferenceLayout实现下拉刷新与上拉分页加载

RecyclerView为多布局样式,实现上拉分页加载 adapter

public class PictrueAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private List<PictrueBean> list; private Context context; private LayoutInflater inflater; private OnItemClickListener onItemClickListener; public PictrueAdapter(List<PictrueBean> list, Context context, OnItemClickListener onItemClickListener) { this.list = list; this.context = context; inflater = LayoutInflater.from(context); this.onItemClickListener = onItemClickListener; } //设置监听 public interface OnItemClickListener { void onItemClickListener(View view, int position); } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = null; RecyclerView.ViewHolder viewHolder = null; //判断是哪种样式,加载哪种布局 switch (viewType) { case 0: view = inflater.inflate(R.layout.pictrue_adapter_layout, parent, false); viewHolder = new MyViewHolder(view); break; case 1: view = inflater.inflate(R.layout.pictrue_item_layout, parent, false); viewHolder = new MyViewHolder2(view); break; case 2: view=inflater.inflate(R.layout.footer_layout,parent,false); viewHolder=new FooterViewHolder(view); break; } return viewHolder; } @Override public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) { //判断不同的样式,显示不同的内容] if(holder instanceof PictrueAdapter.FooterViewHolder){ ((FooterViewHolder) holder).button.setText("正在加载10条..."); }else if (holder instanceof MyViewHolder) { ((MyViewHolder) holder).tvTitle.setText(list.get(position).getTitle()); ((MyViewHolder) holder).tvCount.setText(list.get(position).getImgcount()); ((MyViewHolder) holder).tvComment.setText(list.get(position).getReviewcount() + ""); Picasso.with(context).load(list.get(position).getBigimgsrc()).error(R.drawable.default_news).placeholder(R.drawable.default_news).into(((MyViewHolder) holder).iv); } else if (holder instanceof MyViewHolder2) { ((MyViewHolder2) holder).tvTitle.setText(list.get(position).getTitle()); ((MyViewHolder2) holder).tvCount.setText(list.get(position).getImgcount()); ((MyViewHolder2) holder).tvComment.setText(list.get(position).getReviewcount() + ""); String img = list.get(position).getSmallimgsrc(); String[] imgs = img.split("\\|"); Picasso.with(context).load(imgs[0]).error(R.drawable.default_news).placeholder(R.drawable.default_news).into(((MyViewHolder2) holder).iv1); Picasso.with(context).load(imgs[1]).error(R.drawable.default_news).placeholder(R.drawable.default_news).into(((MyViewHolder2) holder).iv2); Picasso.with(context).load(imgs[2]).error(R.drawable.default_news).placeholder(R.drawable.default_news).into(((MyViewHolder2) holder).iv3); } //设置点击item监听 if (onItemClickListener != null) { holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int pos = holder.getLayoutPosition(); onItemClickListener.onItemClickListener(holder.itemView, pos); } }); } } //设置不用的样式 @Override public int getItemViewType(int position) { if (position == getItemCount() - 1) { return 2; } else if (position % 4 == 0) { return 0; } else { return 1; } } @Override public int getItemCount() { return list == null ? 0 : list.size()+1; } class MyViewHolder extends RecyclerView.ViewHolder { ImageView iv; TextView tvTitle, tvComment, tvCount; public MyViewHolder(View itemView) { super(itemView); iv = ((ImageView) itemView.findViewById(R.id.pictrue_iv)); tvComment = ((TextView) itemView.findViewById(R.id.pictrue_comment)); tvTitle = ((TextView) itemView.findViewById(R.id.pictrue_title)); tvCount = ((TextView) itemView.findViewById(R.id.pictrue_count)); } } class MyViewHolder2 extends RecyclerView.ViewHolder { ImageView iv1, iv2, iv3; TextView tvTitle, tvComment, tvCount; public MyViewHolder2(View itemView) { super(itemView); iv1 = ((ImageView) itemView.findViewById(R.id.pictrue_item_iv1)); iv2 = ((ImageView) itemView.findViewById(R.id.pictrue_item_iv2)); iv3 = ((ImageView) itemView.findViewById(R.id.pictrue_item_iv3)); tvComment = ((TextView) itemView.findViewById(R.id.pictrue_item_comment)); tvTitle = ((TextView) itemView.findViewById(R.id.pictrue_item_title)); tvCount = ((TextView) itemView.findViewById(R.id.pictrue_item_count)); } } class FooterViewHolder extends RecyclerView.ViewHolder { Button button; public FooterViewHolder(View itemView) { super(itemView); button = (Button) itemView.findViewById(R.id.footer_btn); } } }

java代码:

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); if(newState==RecyclerView.SCROLL_STATE_IDLE) { int lastPosition = -1; RecyclerView.LayoutManager manager = recyclerView.getLayoutManager(); if (manager instanceof LinearLayoutManager) { lastPosition = ((LinearLayoutManager) manager).findLastVisibleItemPosition(); } else if (manager instanceof GridLayoutManager) { lastPosition = ((GridLayoutManager) manager).findLastVisibleItemPosition(); } else if (manager instanceof StaggeredGridLayoutManager) { int[] lastPositions = new int[((StaggeredGridLayoutManager) manager).getSpanCount()]; ((StaggeredGridLayoutManager) manager).findLastVisibleItemPositions(lastPositions); lastPosition = findMax(lastPositions); } if (lastPosition == ((LinearLayoutManager) manager).getItemCount()-1) { initData(list.get(list.size() - 1).getId()); } } } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); swip.setEnabled(manager.findFirstCompletelyVisibleItemPosition()==0); } }); swip.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { handler.sendEmptyMessageDelayed(0,3000); } }); private int findMax(int[] lastPositions){ int max=lastPositions[0]; for (int elem:lastPositions){ if(elem>max){ max=elem; } } return max; } private Handler handler=new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); list.clear(); initData(0); swip.setRefreshing(false); } };