1. 程式人生 > >XListView上拉載入,下拉重新整理

XListView上拉載入,下拉重新整理

第一步:依賴自定義元件XlistView 第二步:佈局引入XlistView元件(自定義元件根目錄)

    <com.exam.myxlistviewlibrary.utils.view.XListView
        android:id="@+id/frag_01_xlv"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </com.exam.myxlistviewlibrary.utils.view.XListView>

第三步:配置Adapter(與listview相同).滑動監聽setXlistViewlistenner

package com.exam.week_02.frag;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.exam.myxlistviewlibrary.utils.NetWordUtils;
import com.exam.myxlistviewlibrary.utils.view.XListView;
import com.exam.week_02.ImageloaderUtil;
import com.exam.week_02.R;
import com.exam.week_02.bena.Data;
import com.exam.week_02.bena.Goods;
import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.ArrayList;

public class Fragment_01 extends Fragment {
    String baseUrl = "http://api.expoon.com/AppNews/getNewsList/type/1/p/";

    private XListView xListView;
    ArrayList<Data> list = new ArrayList<Data>();
    int page;
    private MyAdapter myAdapter;
    private ImageLoader instance;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.frag_01,container,false);
        xListView = view.findViewById(R.id.frag_01_xlv);

        instance = ImageLoader.getInstance();

        initdata(page);
        myAdapter = new MyAdapter();

        xListView.setPullLoadEnable(true);
        xListView.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {
                list.clear();
                initdata(0);
            }

            @Override
            public void onLoadMore() {
                page++;
                initdata(page);
            }
        });
        return view;
    }

    private void initdata(int s) {
        String url = baseUrl+s;
        new MyAsyntask().execute(url);
    }
    class  MyAsyntask  extends AsyncTask<String,Void,String>{

        @Override
        protected String doInBackground(String... strings) {
            String netjson = NetWordUtils.getNetjson(strings[0]);
            return netjson;
        }
        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            Goods goods = gson.fromJson(s, Goods.class);
            ArrayList<Data> data = goods.getData();
            list.addAll(data);
            xListView.setAdapter(myAdapter);
            myAdapter.notifyDataSetChanged();
            uiComplete();
        }
    }
    class MyAdapter extends BaseAdapter{
        @Override
        public int getViewTypeCount() {
            return 2;
        }

        @Override
        public int getItemViewType(int position) {
            return position % 2;
        }

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            int itemViewType = getItemViewType(position);
            switch (itemViewType){
                case 0:
                    convertView = View.inflate(getActivity(),R.layout.item00,null);
                    TextView textView = convertView.findViewById(R.id.item00_textView);

                    ImageView imageView = convertView.findViewById(R.id.item00_image);
                    textView.setText(list.get(position).getNews_title());
                    //DisplayImageOptions option = ImageloaderUtil.getDisplayImageOption();
                    instance.displayImage(list.get(position).getPic_url(),imageView);
                    break;
                case 1:
                    convertView = View.inflate(getActivity(),R.layout.item11,null);
                    TextView textView1 = convertView.findViewById(R.id.item11_textView);
                    textView1.setText(list.get(position).getNews_title());
                    break;
            }
            return convertView;
        }
    }
    public void uiComplete(){
        xListView.setRefreshTime("剛剛");
        xListView.stopRefresh();    //讓重新整理頭消失
        xListView.stopLoadMore();   //讓上拉載入的ui消失;

    }
}