recently, when I was watching a mobile phone app tutorial with a high imitation of Lashou, there was a problem when I saw the commodity information in the main interface. It used PullToFresh to achieve the functions of pull-down refresh and pull-up load, that is, to send a http request to my tomcat server to request data and then return it through json, but now I don"t seem to be able to monitor this pull-down action. I hope God can take a look at it for me.

public class GoodsAdapter extends BaseAdapter {

private List<Goods> mList;
public GoodsAdapter(List<Goods> list){
    mList=list;
}

@Override
public int getCount() {
    return (mList != null) ? mList.size() : 0;
}

@Override
public Object getItem(int position) {
    return (mList != null && mList.size() > position) ? mList.get(position-1): null;
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder=null;
    if(convertView==null){
        convertView= LayoutInflater.from(parent.getContext()).inflate(R.layout.goods_list_row,null);
        holder=new ViewHolder();
        ViewUtils.inject(holder,convertView);
        convertView.setTag(holder);
    }else{
        holder=(ViewHolder)convertView.getTag();
    }
    Goods goods=mList.get(position);
    Picasso.with(parent.getContext()).load(goods.getImgUrl())
            .placeholder(R.drawable.default_pic).into(holder.photo);

    holder.title.setText(goods.getSortTile());
    holder.tv_content.setText(goods.getTitle());
    holder.price.setText(String.valueOf("" + goods.getPrice()));
    holder.value.setText(String.valueOf("" + goods.getValue()));


    if (goods.isOp()) {
        holder.appointment_img.setVisibility(View.VISIBLE);
    } else {
        holder.appointment_img.setVisibility(View.GONE);
    }

    return convertView;
}

class ViewHolder{
    @ViewInject(R.id.photo)
    private ImageView photo;
    @ViewInject(R.id.appoitment_img)
    private ImageView appointment_img;
    @ViewInject(R.id.title)
    private TextView title;
    @ViewInject(R.id.tv_content)
    private TextView tv_content;
    @ViewInject(R.id.price)
    private TextView price;
    @ViewInject(R.id.value)
    private TextView value;
    @ViewInject(R.id.distance)
    private TextView distance;


}

}

public class FragmentIndex extends android.support.v4.app.Fragment {

@ViewInject(R.id.home_city)
private TextView home_city;
@ViewInject(R.id.goods_list_view)
private PullToRefreshListView goods_list_view;
private List<Goods> mList;

private int page=0,size=20,count=0;
private GoodsAdapter mGoodsAdapter;


@Override

public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle bundle) {

    View view=LayoutInflater.from(getActivity()).inflate(R.layout.frag_index ,null);
    ViewUtils.inject(this,view);
    goods_list_view.setMode(PullToRefreshBase.Mode.BOTH);//
    goods_list_view.setScrollingWhileRefreshingEnabled(true);

    //
 /*   goods_list_view.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>() {

        @Override
        public void onRefresh(PullToRefreshBase<ListView> refreshView) {
            //
            loadDatas(refreshView.getScrollY()<0);
        }
    });*/
    //
    goods_list_view.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {

        @Override
        //....,,
        public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
            loadDatas(true);
            Log.v("","");
        }

        @Override
        //..pagePP,
        public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
            loadDatas(false);
        }
    });






    //
    new Handler(new Handler.Callback() {
        @Override
        public boolean handleMessage(Message msg) {
            goods_list_view.setRefreshing();
            return true;
        }
    }).sendEmptyMessageDelayed(0,200);



    return  view;
}
//truefalse
private void loadDatas(final boolean direction){
    RequestParams params=new RequestParams();

    if(direction){//
        page=1;
    }else{
        pagePP;
    }


    params.addQueryStringParameter("page",String .valueOf(page));
    params.addQueryStringParameter("size",String.valueOf(size));

    new HttpUtils().send(HttpRequest.HttpMethod.GET, CONST.GOODS_LIST, params, new RequestCallBack<String>() {
        @Override
        public void onSuccess(ResponseInfo<String> responseInfo) {
            goods_list_view.onRefreshComplete();
            Gson gson=new GsonBuilder().create();
            ResponseObject<List<Goods>> object=gson.fromJson(responseInfo.result,new TypeToken <ResponseObject<List<Goods>>>(){}.getType());

            page = object.getPage();
            size = object.getSize();
            count = object.getCount();

            if (direction) {//




                mList=(List<Goods>)object.getDatas();
                mGoodsAdapter = new GoodsAdapter(mList);
                goods_list_view.setAdapter(mGoodsAdapter);
            } else {//
                mList.addAll((List<Goods>)object.getDatas());
                mGoodsAdapter.notifyAll();
            }


            if (count == page) {//

                goods_list_view.setMode(PullToRefreshBase.Mode.PULL_FROM_START);
            }
        }

        @Override
        public void onFailure(HttpException e, String s) {
            goods_list_view.onRefreshComplete();
            Toast.makeText(getActivity(), s, Toast.LENGTH_SHORT).show();
        }
    });
}


@OnClick({R.id.home_city,R.id.home_map,R.id.home_search,})
public void onClick(View v){
    switch (v.getId()){
        case R.id.home_city://
        {
            startActivity(new Intent(getActivity(), CityActivity.class));
            break;
        }

        case R.id.home_map:
            break;
        case R.id.home_search:
            break;
    }
}

@Override
public void setMenuVisibility(boolean menuVisibility){
   super.setMenuVisibility(menuVisibility);
   if(this.getView()!=null)
       this.getView().setVisibility(menuVisibility?View.VISIBLE:View.GONE);
}

}