Android菜鳥練習第十六課 RefreshListView的使用配合萬能適配器(本篇文章自用)

public class BusinessHallFragment extends Fragment implements BusinessHallView {
    public View view;
    public BusinessHallPresenter mPresenter;
    public RefreshListView mLv;
    public MyAdapter mAdapter;
    public int page = 1;//請求的頁碼

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_businesshall, null, false);
        initView();
        return view;
    }


    @Override
    public void fillData(List<BusinessBean.BusinessHallList> list) {
        if (mAdapter == null) {
            mAdapter = new MyAdapter(getActivity(), list, R.layout.item_businesshall);//創建適配器
            mAdapter.setData(list);
            mLv.setAdapter(mAdapter);
        } else {
            mAdapter.setData(list);//適配器中自帶更新數據方法
        }
    }

    @Override
    public void addData(List<BusinessBean.BusinessHallList> list) {
        if (list != null && list.size() > 0) {
            mAdapter.addData(list);
        } else {
            mLv.showNoMoreData();
        }
    }

    public void initView() {
        mPresenter = new BusinessHallPresenter(getActivity(), this);
        mLv = (RefreshListView) view.findViewById(R.id.list);
        mLv.setHeadAndFoot(true, true);
        mLv.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onPullDownRefresh() {
                page = 1;
                mPresenter.getData(page);
                mLv.onRefreshFinish();
            }

            @Override
            public void onLoadMoring() {
                page++;
                mPresenter.getData(page);
                mLv.onRefreshFinish();
            }
        });
        mPresenter.getData(page);
    }

    //適配器
    public class MyAdapter extends CommonAdapter<BusinessBean.BusinessHallList> {

        public MyAdapter(Context context, List<BusinessBean.BusinessHallList> datas, int itemLayoutId) {
            super(context, datas, itemLayoutId);
        }

        @Override
        public void convert(int position, ViewHolder helper, BusinessBean.BusinessHallList item) {
            helper.setText(R.id.tv_title, item.getBusiness_hall_name());
            helper.setText(R.id.tv_content, item.getBusiness_hall_name());
            helper.setText(R.id.tv_distance, item.getDistanceCount());
        }
    }
}

第二部分 Presenter

public class BusinessHallPresenter extends BasePresenter {
    public BusinessHallView view;
    public Context context;

    public BusinessHallPresenter(Context context,BusinessHallView view) {
        super(view);
        this.view = view;
        this.context = context;
    }



    public void getData(final int page){
        RequestQueue requestQueue = Volley.newRequestQueue(context);
        JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, Constants.businessHall + "?currentPage="+page+"&pageSize=20&coordinate_x=4.9E-324&coordinate_y=4.9E-324&city_code=null", null, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                Gson gson = new Gson();
                java.lang.reflect.Type type =new TypeToken<BusinessBean>(){}.getType();
                BusinessBean bean = gson.fromJson(response.toString(),type);
                if(page == 1){
                    view.fillData(bean.getBusinessHallList());
                }else{
                    view.addData(bean.getBusinessHallList());
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                view.showToastMessage(error.getMessage());
            }
        });
        requestQueue.add(request);
    }

}