PullToFreshListView

加依赖

视图:

<com.handmark.pulltorefresh.library.PullToRefreshListView    android:id="@+id/pull_refresh_list"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:cacheColorHint="#00000000"    android:divider="#19000000"    android:dividerHeight="4dp"    android:fadingEdge="none"    android:fastScrollEnabled="false"    android:footerDividersEnabled="false"    android:headerDividersEnabled="false"    android:smoothScrollbar="true" />

代码:

public class MainActivity extends AppCompatActivity {    PullToRefreshListView ptrshlv;    List<List<String>> result;    LinkedList<List<String>> arr;    MyAdpt myadpt;    String path = "https://suggest.taobao.com/sug?code=utf-8&q=%E6%98%BE%E7%A4%BA%E5%99%A8";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ptrshlv = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);        ptrshlv.setMode(PullToRefreshBase.Mode.BOTH);        arr = new LinkedList<List<String>>();        myadpt = new MyAdpt();        ptrshlv.setAdapter(myadpt);        new MyAsyncTask().execute(path);        ptrshlv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {            @Override            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {                arr.clear();                new MyAsyncTask().execute(path);            }            @Override            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {                new MyAsyncTask().execute(path);            }        });    }    //添加    class MyAsyncTask extends AsyncTask<String,Void,String>{        @Override        protected void onPreExecute() {            super.onPreExecute();        }        @Override        protected void onPostExecute(String s) {            super.onPostExecute(s);            Gson gson = new Gson();            Bean bean = gson.fromJson(s, Bean.class);            result = bean.getResult();            arr.addAll(result);            myadpt.notifyDataSetChanged();            ptrshlv.onRefreshComplete();        }        @Override        protected void onProgressUpdate(Void... values) {            super.onProgressUpdate(values);        }        @Override        protected String doInBackground(String... strings) {            try {                URL url = new URL(strings[0]);                HttpURLConnection huc = (HttpURLConnection) url.openConnection();                if(huc.getResponseCode()==200){                    InputStream inputStream = huc.getInputStream();                    BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));                    StringBuilder sb = new StringBuilder();                    String st = "";                    while((st=br.readLine())!=null){                        sb.append(st);                    }                    String ss = sb.toString();                    return ss;                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }    }    class MyAdpt extends BaseAdapter{        @Override        public int getCount() {            return arr.size();        }        @Override        public Object getItem(int i) {            return arr.get(i);        }        @Override        public long getItemId(int i) {            return i;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            Adpt ad;            List<String> liststr = arr.get(i);            if(view==null){                view = View.inflate(MainActivity.this,android.R.layout.simple_expandable_list_item_1,null);                ad = new Adpt();                ad.tv1 = view.findViewById(android.R.id.text1);                view.setTag(ad);            }else{                ad = (Adpt) view.getTag();            }            ad.tv1.setText(liststr.get(0));            return view;        }        class Adpt{            TextView tv1;        }    }}