Tablayout +pulltorefresh

最新推荐文章于 2019-01-21 08:28:38 发布

原创最新推荐文章于 2019-01-21 08:28:38 发布 · 198 阅读

CC 4.0 BY-SA版权

本文详细介绍了在安卓开发中如何使用自定义适配器进行列表数据展示，包括列表的初始化、数据加载、更新及上拉下拉刷新功能实现。通过具体的代码示例，展示了如何在Fragment中实现PullToRefreshListView的适配，并使用异步任务进行数据请求和处理。

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适配器
public class MAdapter extends BaseAdapter {

private Context context;
private List<InBean.ResultBean> list;

public MAdapter(Context context) {
    this.context = context;
    list=new ArrayList<>();
}

public void setList(List<InBean.ResultBean> list) {
    this.list.clear();
    if (list!=null){
        this.list = list;
    }
    notifyDataSetChanged();
}

@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) {
    ViewHolder holder;
    if (convertView==null){
        convertView=LayoutInflater.from(context).inflate(R.layout.item_in,parent,false);
        holder=new ViewHolder();
        holder.imageView=convertView.findViewById(R.id.item_imager);
        holder.textView1=convertView.findViewById(R.id.item_text1);
        holder.textView2=convertView.findViewById(R.id.item_text2);
        convertView.setTag(holder);
    }else {
        holder= (ViewHolder) convertView.getTag();
    }
    holder.textView1.setText(list.get(position).getName());
    holder.textView2.setText(list.get(position).getSummary());
    //使用Imageloder的框架
    ImageLoader.getInstance().displayImage(list.get(position).getImageUrl(),holder.imageView);

    return convertView;
}
//复用类
class ViewHolder{
    ImageView imageView;
    TextView textView1,textView2;
}

}
tablayout适配器
public class MyAdapter extends FragmentPagerAdapter {
private String [] names=new String[]{“正在热映”,“即将热映”};
public MyAdapter(FragmentManager fm) {
super(fm);
}

private String apiUrl ="";

@Override
public Fragment getItem(int i) {

  switch (i){
      case 0:
              apiUrl="http://172.17.8.100/movieApi/movie/v1/findHotMovieList?page=1&count=10";
      default:
              apiUrl="http://172.17.8.100/movieApi/movie/v1/findReleaseMovieList?page=1&count=10";
  }

     Bundle bundle = new Bundle();
     bundle.putString("url",apiUrl);
     ZFragmentA zFragmentA = new ZFragmentA();
     zFragmentA.setArguments(bundle);
     return zFragmentA;

}

@Override
public int getCount() {
    return names.length;
}

@Nullable
@Override
public CharSequence getPageTitle(int position) {
    return names[position];
}

}
pulltorefresh列表展示
public class ZFragmentA extends BaseFragment {
private PullToRefreshListView pul;
private MAdapter madapter;
private int page=10;
private String url;
/* private List<InBean.ResultBean> list=new ArrayList<>();*/

//获取数据
@Override
protected void initData() {
    //page=1&count=10
     url = getArguments().getString("url");
    // 新建一个class 异步请求news数据
   new InTask().execute(url+page/*+"page="+1+"&count="+10*/);
}

@Override
protected void initView(View view) {
    //获取资源id

    pul=view.findViewById(R.id.pul);
    //创建适配器
    madapter=new MAdapter(getActivity());
    pul.setAdapter(madapter);
    //上拉加载下拉刷新
    setListener();
}

// 上拉加载下拉刷新
private void setListener() {
//设置监听事件
pul.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2() {
//下拉加载
@Override
public void onPullDownToRefresh(PullToRefreshBase refreshView) {
/* list.clear();*/
page=1;
new InTask().execute(url);
pul.onRefreshComplete();
}

        @Override
        public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
            new InTask().execute(url+(++page));
            pul.onRefreshComplete();
        }
    });
}

class InTask extends AsyncTask<String,Void,List<InBean.ResultBean>>{

    @Override
    protected List<InBean.ResultBean> doInBackground(String... strings) {
        try {
            String s = HttpUtils.get(strings[0]);
            Gson gson=new Gson();
            InBean inBean = gson.fromJson(s, InBean.class);
            return inBean.getResult();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    //展示数据
    @Override
    protected void onPostExecute(List<InBean.ResultBean> resultBeans) {
        super.onPostExecute(resultBeans);
        //添加数据
        madapter.setList(resultBeans);

    }
}
@Override
protected int setview() {
    return R.layout.zfragment;
}

}