public class RefreshFootAdapter extends     RecyclerView.Adapter<RecyclerView.ViewHolder> {   // 上拉加載更多   public static final int SATUS_PULLUP_LOAD_MORE = 0;   // 正在加載中   public static final int SATUS_LOADING_MORE = 1;   public static final int SATUS_UP_LOADING_MORE = 2;   // 上拉加載更多狀態-默認為0   private int load_more_status = 0;   private LayoutInflater mInflater;   private List<String> mTitles = null;   private static final int TYPE_ITEM = 0; // 普通Item View   private static final int TYPE_FOOTER = 1; // 底部FootView   private static final int TYPE_FOOTER_EMPTY = 2; // 底部空白View   private static int pagesize;   private int eview_height = 1;   private long TimeFlag;// 回彈時間   private RecyclerView parent;   private boolean loadmare;// 判斷當前是可加載更多   private boolean loading;// 判斷是否正在加載   private int startY, nowY;// 滑動判斷 <span style="white-space:pre"> </span>//構造函數 處理滑動監聽 更新等功能   public RefreshFootAdapter(Context context, RecyclerView parent,       final LinearLayoutManager linearLayoutManager, int pagesize,       final Runnable onloadmore) {     this.parent = parent;     this.mInflater = LayoutInflater.from(context);     this.mTitles = new ArrayList<String>();     for (int i = 0; i < 20; i++) {       int index = i + 1;       mTitles.add("item" + index);     }     this.pagesize = pagesize;     parent.setOnTouchListener(new OnTouchListener() {       @Override       public boolean onTouch(View v, MotionEvent ev) {         // TODO Auto-generated method stub         switch (ev.getAction()) {         case MotionEvent.ACTION_MOVE:           nowY = (int) ev.getY();           if (RefreshFootAdapter.this.getItemCount() == linearLayoutManager               .findLastVisibleItemPosition() + 1) {             if (startY == 0) {// 按下               startY = nowY;             }             int changeY = nowY - startY;             RefreshFootAdapter.this                 .notifyEmptyView((int) (-changeY / 1.3f));             if (loading) {               return false;             }             RefreshFootAdapter.this                 .changeMoreStatus(RefreshFootAdapter.this.SATUS_UP_LOADING_MORE);             loadmare = true;           } else {             loadmare = false;             if (loading) {               return false;             }             RefreshFootAdapter.this                 .changeMoreStatus(RefreshFootAdapter.this.SATUS_PULLUP_LOAD_MORE);             // 普通的滑動             startY = 0;           }           break;         case MotionEvent.ACTION_UP:           RefreshFootAdapter.this.resetEmptyView();           if (loadmare) {             if (loading) {               return false;             } else {               RefreshFootAdapter.this                   .changeMoreStatus(RefreshFootAdapter.this.SATUS_LOADING_MORE);               if (onloadmore != null && !loading) {                 loading = true;                 onloadmore.run();               }             }           }           startY = 0;           break;         default:           break;         }         return false;       }     });   }   /**    * item顯示類型    *    * @param parent    * @param viewType    * @return    */   public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,       int viewType) {     // 進行判斷顯示類型，來創建返回不同的View     if (viewType == TYPE_ITEM) {       View view = mInflater.inflate(R.layout.item_recycler_layout,           parent, false);       // 這邊可以做一些屬性設置，甚至事件監聽綁定       // view.setBackgroundColor(Color.RED);       ItemViewHolder itemViewHolder = new ItemViewHolder(view);       return itemViewHolder;     } else if (viewType == TYPE_FOOTER) {       View foot_view = mInflater.inflate(           R.layout.recycler_load_more_layout, parent, false);       // 這邊可以做一些屬性設置，甚至事件監聽綁定       // view.setBackgroundColor(Color.RED);       FootViewHolder footViewHolder = new FootViewHolder(foot_view);       return footViewHolder;     } else if (viewType == TYPE_FOOTER_EMPTY) {       View foot_view_empty = mInflater.inflate(           R.layout.recycler_load_more_layout_empty, parent, false);       // 這邊可以做一些屬性設置，甚至事件監聽綁定       // view.setBackgroundColor(Color.RED);       FootEmptyHolder footEmptyViewHolder = new FootEmptyHolder(           foot_view_empty);       return footEmptyViewHolder;     }     return null;   }   /**    * 數據的綁定顯示    *    * @param holder    * @param position    */   public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {     if (holder instanceof ItemViewHolder) {       ((ItemViewHolder) holder).item_tv.setText(mTitles.get(position));       holder.itemView.setTag(position);     } else if (holder instanceof FootViewHolder) {       FootViewHolder footViewHolder = (FootViewHolder) holder;       switch (load_more_status) {       case SATUS_PULLUP_LOAD_MORE:         footViewHolder.foot_view_item_tv.setText("上拉加載更多...");         break;       case SATUS_LOADING_MORE:         footViewHolder.foot_view_item_tv.setText("正在加載更多數據...");         break;       case SATUS_UP_LOADING_MORE:         footViewHolder.foot_view_item_tv.setText("松開加載更多數據...");         break;       }     } else if (holder instanceof FootEmptyHolder) {       FootEmptyHolder footViewHolder = (FootEmptyHolder) holder;       footViewHolder.empty.setLayoutParams(new ViewGroup.LayoutParams(           111, eview_height));     }   }   /**    * 進行判斷是普通Item視圖還是FootView視圖    *    * @param position    * @return    */   @Override   public int getItemViewType(int position) {     // 最后一個item設置為footerView     if (position + 1 == getItemCount()) {       return TYPE_FOOTER_EMPTY;     } else if (position + 2 == getItemCount()) {       return TYPE_FOOTER;     } else {       return TYPE_ITEM;     }   } <span style="white-space:pre"> </span>//如果是頁數的倍數 itemcount+2   @Override   public int getItemCount() {     if (mTitles.size() % pagesize != 0) {       return mTitles.size();     } else {       return mTitles.size() + 2;     }     // return mTitles.size()+1;   }   // 自定義的ViewHolder，持有每個Item的的所有界面元素   public static class ItemViewHolder extends RecyclerView.ViewHolder {     public TextView item_tv;     public ItemViewHolder(View view) {       super(view);       item_tv = (TextView) view.findViewById(R.id.item_tv);     }   }   /**    * 底部FootView布局    */   public static class FootViewHolder extends RecyclerView.ViewHolder {     private TextView foot_view_item_tv;     public FootViewHolder(View view) {       super(view);       foot_view_item_tv = (TextView) view           .findViewById(R.id.foot_view_item_tv);     }   } <span style="white-space:pre"> </span>//空白項   public static class FootEmptyHolder extends RecyclerView.ViewHolder {     private View empty;     public FootEmptyHolder(View view) {       super(view);       empty = view.findViewById(R.id.empty);     }   }   // 添加數據   public void addItem(List<String> newDatas) {     // mTitles.add(position, data);     // notifyItemInserted(position);     newDatas.addAll(mTitles);     mTitles.removeAll(mTitles);     mTitles.addAll(newDatas);     notifyDataSetChanged();   } <span style="white-space:pre"> </span>//更新添加數據   public void addMoreItem(List<String> newDatas) {     mTitles.addAll(newDatas);     notifyDataSetChanged();   } <span style="white-space:pre"> </span>//更新空白項高度   private void notifyEmptyView(int height) {     this.eview_height = height;     notifyItemChanged(getItemCount() - 1);   } <span style="white-space:pre"> </span>//空白回彈 偽回彈動畫   private void resetEmptyView() {     final int dx = eview_height;     new Thread(new Runnable() {       @Override       public void run() {         // TODO Auto-generated method stub         final int time = 500;         final long startTime = new Date().getTime();         TimeFlag = startTime;         long nowTime = new Date().getTime();         while (startTime + time > nowTime && TimeFlag == startTime) {           nowTime = new Date().getTime();           final int dt = (int) (nowTime - startTime);           parent.post(new Runnable() {             @Override             public void run() {               // TODO Auto-generated method stub               eview_height = eview_height * (time - dt) / time;               notifyDataSetChanged();             }           });           try {             Thread.sleep(10);           } catch (InterruptedException e) {             // TODO Auto-generated catch block             e.printStackTrace();           }         }         parent.post(new Runnable() {           @Override           public void run() {             // TODO Auto-generated method stub             eview_height = 0;             notifyDataSetChanged();           }         });       }     }).start();   } <span style="white-space:pre"> </span>//停止加載更多 重置loading狀態和顯示文本   public void stopLoadMore() {     notifyDataSetChanged();     loading = false;     RefreshFootAdapter.this     .changeMoreStatus(RefreshFootAdapter.this.SATUS_PULLUP_LOAD_MORE);   }   //改變加載條狀態   private void changeMoreStatus(int status) {     if (loading) {       return;     }     load_more_status = status;     notifyDataSetChanged();   } }