GridView puu Adaapter 接收数据_bean 通知apter-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44660509/article/details/88093795

本文介绍了一个使用Fragment进行数据加载与显示的例子，包括从网络获取数据、使用Gson解析JSON、自定义适配器展示数据以及实现下拉刷新和上拉加载更多功能。代码中展示了如何初始化布局、视图、数据以及适配器，并处理网络请求和数据库查询。

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package com.example.Frag;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
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.GridView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.example.Bean.Bean;
import com.example.Beas.BeasFramen;
import com.example.MyAdapter.GridAdapter;
import com.example.MyAdapter.MyAdapter;
import com.example.NetUlit.NetUli;
import com.example.dao.Dao;
import com.example.day_13_01.R;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.youth.banner.Banner;
import com.youth.banner.loader.ImageLoader;

import java.util.ArrayList;
import java.util.List;

public class Frag_01 extends BeasFramen {
private List image = new ArrayList();
private String url = “http://api.expoon.com/AppNews/getNewsList/type/1/p/”;
private Banner banner;
private List<Bean.DataBean> list = new ArrayList<Bean.DataBean>();
private GridView gridView;
private int page = 1;
private PullToRefreshListView pull;
private GridAdapter gridAdapter;
private MyAdapter myAdapter;
private Dao dao;

@Override
protected int initLayout() {
    return R.layout.frag_01;

}

@Override
protected void initView() {
    banner = find(R.id.banner);
    gridView = find(R.id.grid);
    pull = find(R.id.listview);
    dao = new Dao(getActivity());
    pull.setMode(PullToRefreshBase.Mode.BOTH);
    pull.setScrollingWhileRefreshingEnabled(true);
}

@Override
protected void initDate() {

    image.add("http://ww1.sinaimg.cn/large/0065oQSqly1fsvb1xduvaj30u013175p.jpg");
    image.add("http://ww1.sinaimg.cn/large/0065oQSqly1fsq9iq8ttrj30k80q9wi4.jpg");
    image.add("http://ww1.sinaimg.cn/large/0065oQSqly1fsp4iok6o4j30j60optbl.jpg");
    image.add("http://ww1.sinaimg.cn/large/0065oQSqly1fsmis4zbe7j30sg16fq9o.jpg");
    myAdapter = new MyAdapter(getActivity(),list);
    gridAdapter = new GridAdapter(getActivity(), list);
    pull.setAdapter(myAdapter);
     gridView.setAdapter(gridAdapter);
    if (NetUli.isgetconten(getActivity())) {
        banner.isAutoPlay(true).setImages(image).setDelayTime(2000).setImageLoader(new ImageLoader() {
            @Override
            public void displayImage(Context context, Object path, ImageView imageView) {
                Glide.with(context).load(path).into(imageView);
            }
        }).start();
        isgoing(page);
        pull.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                  isgoing(page);
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                      page++;
                      isgoing(page);
            }
        });
    } else {
        Toast.makeText(getActivity(), "请检查网络", Toast.LENGTH_SHORT).show();
        Cursor person = dao.query("person", null, null, null, null, null, null);

if(person.moveToFirst()){
do {
String news_title = person.getString(person.getColumnIndex(“news_title”));
String pic_url = person.getString(person.getColumnIndex(“pic_url”));
list.add(new Bean.DataBean(news_title,pic_url));
}while (person.moveToNext());
}

    }
}

private void isgoing(int p) {
        String ss = url+p;
        NetUli.MyAsyncTaca(ss, new NetUli.MyCallBack() {
            @Override
            public void getDate(String s) {
                ismaking(s);
            }
        });
}

private void ismaking(String sl) {
    Gson gson = new Gson();
    Bean bean = gson.fromJson(sl, Bean.class);
    List<Bean.DataBean> data = bean.getData();
    for (int i = 0; i <data.size() ; i++) {
        ContentValues values = new ContentValues();
        values.put("news_title",data.get(i).getNews_title());
        values.put("pic_url",data.get(i).getPic_url());
        dao.insert("person",null,values);

    }
  list.addAll(data);
  gridAdapter.notifyDataSetChanged();;
  myAdapter.notifyDataSetChanged();
  pull.onRefreshComplete();
}

}