listview展示 添加数据库 判断有无网

public class Fragment1 extends BaseFragment {
    private ListView listView;
    private List<JsonBean.DataBean> data;
    private JsonBean jsonBean;
    private ListView clistView;
    private Dao dao;
    private Cursor chen;

//布局

@Override
    protected int bindLayout() {
        return R.layout.fragment1;
    }

//控件

@Override
    protected void initView() {
        dao = new Dao(getActivity());
        listView = bindView(R.id.listView);
        clistView = bindView(R.id.clistView);
    }

//判断有误网

@Override
protected void initData() {
    if (HttpUtils.isNetWord(getActivity())) {
        HttpUtils.MyAsyncTask myAsyncTask = new HttpUtils.MyAsyncTask();
        myAsyncTask.setBacks(new HttpUtils.MyAsyncTask.CallBacks() {
            @Override
            public void getData(String s) {
                Gson gson = new Gson();
                jsonBean = gson.fromJson(s, JsonBean.class);
                data = jsonBean.getData();
                Toast.makeText(getActivity(), "数据请求成功", Toast.LENGTH_SHORT).show();
                listView.setAdapter(new MyAdapter(data,getActivity()));
                //判断数据库有没有数据
                if (dao.select("chen",null,null,null,null,null,null).moveToFirst()){
                    return;
                }else {
                    for (int i=0;i<data.size();i++){
                        ContentValues contentValues = new ContentValues();
                        contentValues.put("news_summary",data.get(i).getNews_summary());
                        contentValues.put("news_title",data.get(i).getNews_title());
                        contentValues.put("url",data.get(i).getPic_url());
                        dao.add("chen",null,contentValues);
                    }
                }
            }
        });
        myAsyncTask.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/1");
    }else {
       // Toast.makeText(getActivity(), "无网络连接", Toast.LENGTH_SHORT).show();da
      Cursor  chen = dao.select("chen", null, null, null, null, null, null);
       data= new ArrayList<>();
      if (chen.moveToFirst()){
            do {
                String news_summary = chen.getString(chen.getColumnIndex("news_summary"));
                String news_title = chen.getString(chen.getColumnIndex("news_title"));
                String url = chen.getString(chen.getColumnIndex("url"));
                data.add(new JsonBean.DataBean(news_summary,news_title,url));
            }while (chen.moveToNext());
        }
        listView.setAdapter(new MyAdapter(data,getActivity()));
    }
}

//
@Override
protected void bindEvent() {
}
}