Android自定义下拉刷新上拉加载

public class TestModel {
  private String mTitle;
  private String mDesc;
  private String mTime;

  public TestModel(String mTitle, String mDesc, String mTime) {
    this.mTitle = mTitle;
    this.mDesc = mDesc;
    this.mTime = mTime;
  }
  //...一堆getXxx ,setXxx方法
  //equals必写,添加数据时候用于判断
   @Override
  public boolean equals(Object o) {
    TestModel model = (TestModel) o;
    if (!mTitle.equals(model.getmTitle())) {
      return false;
    } else if (!mDesc.equals(model.getmDesc())) {
      return false;
    } else if (!mTime.equals(model.getmTitle())) {
      return false;
    }
    return true;
  }

private class GetData {
    int size = 0 ;
    int max = 25; //数据的最大值

    public void setStart(int size) {
      this.size = size;
    }
    //根据size获取指定大小的List,最大不能超过max
    public List initData(int size) {
      List mDatas = new ArrayList<>();
      TestModel model = null;
      for (int i = start; i <((size + start) > max &＃63; max : (size + start)); i++) {
        model = new TestModel("Title" + i, "Desc" + i, "今天 11:30");
        mDatas.add(model);
      }
      start += size;
      return mDatas;

    }
  }

public void initData() {
    if (getData == null) {
      getData = new GetData();
    }
    mLists = getData.initData(size); //获取默认显示的数量的item
    mhandler.sendEmptyMessage(REFRESH); //通知handler更新
  }

if (msg.what == REFRESH) {
if (mAdapter == null) {
mAdapter = new OneAdapter(mContext);
mAdapter.setmDatas(mLists);//设置数据
//...对适配器的设置,这里先省去,免得混淆
mRecyclerView.setLayoutManager(new LinearLayoutManager(mContext));
mRecyclerView.setAdapter(mAdapter);
    } else {
     mAdapter.setmDatas(mLists);
     mAdapter.cleadnCount();
     mAdapter.notifyDataSetChanged();
   }
  initRefresh(); //判断refreshLayout是否在刷新,是的话取消刷新操作 .就不贴代码了显的乱糟糟

mRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
   @Override
   public void onRefresh() {
     new Thread(mRunnable).start();//runnable调用了initData()方法;
   }
   });

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@Override
  public int getItemCount() {
    if (mDatas.size() > minShowLoad) { //当前item能将屏幕显示满

      return mDatas.size() + 1; //则默认显示加载或者没有更多
    }
    return mDatas.size(); //如果不能显示满,则不显示加载和没有更多
  }

@Override
  public int getItemViewType(int position) {
    if (position == mDatas.size()) {
      return VIEWTYPE_LOAD; //最后一个显示加载信息
    }
    return VIEWTYPE_CONTENT;//否则显示正常布局
  }

//内容布局
  private class ContentViewHolder extends RecyclerView.ViewHolder {
    private TextView mTitle;
    private TextView mDesc;
    private TextView mTime;
    private ImageView mHead;
    private View itemView;

    public ContentViewHolder(View itemView) {
      super(itemView);
      this.itemView = itemView;
      mTitle = (TextView) itemView.findViewById(R.id.item_title);
      mDesc = (TextView) itemView.findViewById(R.id.item_desc);
      mTime = (TextView) itemView.findViewById(R.id.item_time);
      mHead = (ImageView) itemView.findViewById(R.id.item_head);
    }
  }

//加载更多的布局  (用于显示正在加载和没有更多
  private class LoadMoreViewHolder extends RecyclerView.ViewHolder {
    private ImageView mImage;
    private ProgressBar mProgress;
    private TextView mMsg;

    public LoadMoreViewHolder(View itemView) {
      super(itemView);
      mImage = (ImageView) itemView.findViewById(R.id.load_image);
      mProgress = (ProgressBar) itemView.findViewById(R.id.load_progress);
      mMsg = (TextView) itemView.findViewById(R.id.load_tv);
    }
  }

  @Override
  public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = null;
    switch (viewType) {
      case 1:
        itemView = LayoutInflater.from(mContext).inflate(R.layout.load_layout, parent, false);
        return new LoadMoreViewHolder(itemView);
      case 2:
        itemView = LayoutInflater.from(mContext).inflate(R.layout.item_test, parent, false);
        return new ContentViewHolder(itemView);
    }
    return null;
  }

public interface onLoadMoreListener {
    void loadMore();
  }
  //全局变量
private onLoadMoreListener onLoadMoreListener;

@Override
  public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    if (holder instanceof ContentViewHolder) {
      TestModel model = mDatas.get(position);
      ((ContentViewHolder) holder).mTitle.setText(model.getmTitle());
      ((ContentViewHolder) holder).mDesc.setText(model.getmDesc());
      ((ContentViewHolder) holder).mTime.setText(model.getmTime());
    } else if (holder instanceof LoadMoreViewHolder) {
      if (mDatas.size() 

mAdapter.setOnLoadMoreListener(new OneAdapter.onLoadMoreListener() {
    @Override
    public void loadMore() {
   //增加数据到数据源中
   //调用adapter的addData方法
   //更新适配器显示
  }
}