xListView的简单使用

xListView的使用：下面是写过的一段代码，加载网络图片适配listview

1：将xlistview当成本工程的依赖包

2：布局文件


<com.limxing.xlistview.view.XListView
    android:id="@+id/lv"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
</com.limxing.xlistview.view.XListView>


3：主界面


public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener {


    private static final String TAG ="MainActivity" ;
    private XListView lv;
    private  int index=1;
    private MyListViewAdapter adapter;
    private boolean b = true;
    private ProgressDialog dialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        lv = (XListView) findViewById(R.id.lv);
        //设置支持上拉加载
        lv.setPullLoadEnable(true);
        //设置支持下拉刷新
        lv.setPullRefreshEnable(true);
        //设置监听事件，实现接口并实现接口里的两个方法
        lv.setXListViewListener(this);

        getData(index);

    }
    //请求数据
    private void getData(int index) {

        new AsyncTask<String,Void,String>(){

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                dialog.dismiss();
                if (s!=null){
                    Gson gson = new Gson();
                    Foods foods = gson.fromJson(s, Foods.class);
                    List<Foods.ResultBean.DataBean> list = foods.getResult().getData();
                   //当适配器为空时，创建适配器并设置
                    if (adapter == null){
                         adapter = new MyListViewAdapter(MainActivity.this,list);
                         lv.setAdapter(adapter);
                    }else{
                     //否则调用适配器里自定义的加载更多的方法  添加更多数据，将读取数据所得到的集合跟自定义的boolean值传过去
                        adapter.addMore(foods.getResult().getData(),b);
                     //刷新适配器
                        adapter.notifyDataSetChanged();
                    }
                }
            }

            @Override
            protected String doInBackground(String... params) {
                try {
                    String path = params[0];
                    URL url = new URL(path);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setReadTimeout(5000);
                    connection.setConnectTimeout(5000);

                    if (connection.getResponseCode() == 200){
                        InputStream is = connection.getInputStream();
                        String json = StreamToos.readStreamWork(is);
                        return json;
                    }

                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return null;
            }
        }.execute("http://apis.juhe.cn/cook/query?key=de558ae7e2e2a24fc1f013fbb3327ae1&menu=红烧肉&pn="+index);

    }


    //下拉刷新
    @Override
    public void onRefresh() {
        b=false;
         //index是页码，表示第几页
        ++index;
        getData(index);
        lv.stopRefresh(true);

    }
    //上拉加载
    @Override
    public void onLoadMore() {
        b=true;
        ++index;
        getData(index);
        lv.stopLoadMore();
    }
}

4：适配器

public class MyListViewAdapter extends BaseAdapter {
    private Context context;
    private List<Foods.ResultBean.DataBean> list;

    public MyListViewAdapter(Context context, List<Foods.ResultBean.DataBean> list) {

        this.context=context;
        this.list=list;
    }

    //自定义添加更多的方法
    public void addMore(List<Foods.ResultBean.DataBean> lists,boolean b){

        for (Foods.ResultBean.DataBean dataBeen:lists) {

         //遍历传过来的集合，当传过来的boolean值为true时，将数据添加到之前的适配器的集合（默认往后面添加）
           //否则将数据添加到集合的前面
            if (b){
                list.add(dataBeen);
            }else{
                list.add(0,dataBeen);
            }
        }

    }

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

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView==null){
            convertView=View.inflate(context, R.layout.listview_item,null);
        }
        ImageView image_1 = (ImageView) convertView.findViewById(R.id.image_1);
        TextView text_1 = (TextView) convertView.findViewById(R.id.text_1);
        text_1.setText(list.get(position).getTitle());
//        使用默认的ImageLoaderConfiguration
        ImageLoader.getInstance().displayImage(list.get(position).getAlbums().get(0),image_1);

        return convertView;
    }


}