PullToRefresh引入依赖,布局，适配器ListView上拉加载下拉刷新

使用PullToRefreshListView前 先在File-New-import Module 导入pulltoRefreshLibrary，
然后给项目 添加 module的依赖，

选择pulltoRefreshLibrary

activity_main.xml 

[html] view plain copy <?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:tools="http://schemas.android.com/tools"      android:layout_width="match_parent"      android:layout_height="match_parent"      >        <com.handmark.pulltorefresh.library.PullToRefreshListView          xmlns:ptr="http://schemas.android.com/apk/res-auto"          android:layout_height="match_parent"          android:layout_width="match_parent"          android:id="@+id/refresh_list_view"          ptr:ptrDrawable="@drawable/default_ptr_flip"          ptr:ptrAnimationStyle="flip"          ptr:ptrHeaderBackground="#383838"          ptr:ptrHeaderTextColor="#FFFFFF"          >  </com.handmark.pulltorefresh.library.PullToRefreshListView>  </RelativeLayout>  适配器里面的

[html] view plain copy public class MyAdapter extends BaseAdapter{      List<DBean.NewslistBean> list;      Context context;      public MyAdapter(List<DBean.NewslistBean> list, Context context) {          this.context = context;          this.list = list;            ImageLoaderConfiguration configuration = ImageLoaderConfiguration.createDefault(context);          ImageLoader.getInstance().init(configuration);      }        @Override      public int getCount() {          return list.size();      }        @Override      public Object getItem(int i) {          return list.get(i);      }        @Override      public long getItemId(int i) {          return i;      }        @Override      public View getView(int i, View view, ViewGroup viewGroup) {          ViewHolder holder;          if (view==null){              view = View.inflate(context,R.layout.list_item,null);                holder = new ViewHolder();              holder.imageView = view.findViewById(R.id.list_image);              holder.textView = view.findViewById(R.id.list_text);                view.setTag(holder);          }else{              holder = (ViewHolder) view.getTag();          }          holder.textView.setText(list.get(i).getTitle());          ImageLoader.getInstance().displayImage(list.get(i).getPicUrl(),holder.imageView);          return view;      }      class ViewHolder{          ImageView imageView;          TextView textView;      }  }  MainActivity里面的[html] view plain copy public class MainActivity extends AppCompatActivity {      private List<DBean.NewslistBean> list = new ArrayList<>();      private PullToRefreshListView refreshListView;int num = 1;        private MyAdapter myAdapter;    private ILoadingLayout endlabels;      private ILoadingLayout startlabels;      @Override       protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);            setContentView(R.layout.activity_main);          refreshListView = (PullToRefreshListView)      findViewById(R.id.refresh_list_view);            getDataFromNet();             //设置PullToRefreshListView刷新模式,上拉下拉都可以            refreshListView.setMode(PullToRefreshBase.Mode.BOTH);             //设置刷新显示的状态,可以下拉,不能上拉           startlabels = refreshListView.getLoadingLayoutProxy(true,false);         startlabels.setRefreshingLabel("正在刷新");           startlabels.setPullLabel("下拉刷新");            startlabels.setReleaseLabel("松开刷新");          endlabels = refreshListView.getLoadingLayoutProxy(false,true);           endlabels.setRefreshingLabel("正在加载");            endlabels.setPullLabel("上拉加载");            endlabels.setReleaseLabel("松开加载");            //设置监听事件            refreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {        @Override                //下拉刷新调用               public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {                  num =1;                   //获取数据                 getDataFromNetxiala();                 setAdapter();                }              @Override             //上拉加载调用          public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {        num++;         getDataFromNet();            setAdapter();              }          });       }        private void setAdapter() {           if (myAdapter==null) {             myAdapter = new MyAdapter(list, MainActivity.this);          refreshListView.setAdapter(myAdapter);           }else{          myAdapter.notifyDataSetChanged();          }        }        private void getDataFromNet() {        AsyncTask<Void, Void, String> asyncTask = new AsyncTask<Void, Void, String>() {       @Override               protected String doInBackground(Void... voids) {        String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+num;             try {                       URL url = new URL(path);                     HttpURLConnection connection = (HttpURLConnection) url.openConnection();       connection.setRequestMethod("GET");               connection.setConnectTimeout(5000);                      connection.setReadTimeout(5000);                       int responseCode = connection.getResponseCode();                  if (responseCode==200){                         InputStream inputStream = connection.getInputStream();                      String json = streamtoString(inputStream,"utf-8");                      Thread.sleep(2000);                      return json;                     }                  } catch (Exception e) {       e.printStackTrace();                  }                   return null;          }              @Override        protected void onPostExecute(String json) {         Gson gson = new Gson();                  DBean dBean = gson.fromJson(json, DBean.class);          list.addAll(dBean.getNewslist());                   long currentTimeMillis = System.currentTimeMillis();           Date date2= new Date(currentTimeMillis);                  SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm");           String format = dateFormat.format(date2);                   //设置刷新的时间                   endlabels.setLastUpdatedLabel(format);             //停止刷新                   refreshListView.onRefreshComplete();         setAdapter();           }            };           asyncTask.execute();      }       private void getDataFromNetxiala() {        AsyncTask<Void, Void, String> asyncTask = new AsyncTask<Void, Void, String>() {       @Override             protected String doInBackground(Void... voids) {            String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+num;            try {                   URL url = new URL(path);                      HttpURLConnection connection = (HttpURLConnection) url.openConnection();             connection.setRequestMethod("GET");                   connection.setConnectTimeout(5000);                    connection.setReadTimeout(5000);                      int responseCode = connection.getResponseCode();                   if (responseCode==200){                          InputStream inputStream = connection.getInputStream();                String json = streamtoString(inputStream,"utf-8");                         Thread.sleep(2000);                          return json;                        }                   } catch (Exception e) {          e.printStackTrace();            }                   return null;           }               @Override              protected void onPostExecute(String json) {        Gson gson = na6e8ew Gson();                DBean dBean = gson.fromJson(json, DBean.class);          list.addAll(0,dBean.getNewslist());                  long currentTimeMillis = System.currentTimeMillis();       Date date2= new Date(currentTimeMillis);                 SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm");        String format = dateFormat.format(date2);                  //设置刷新的时间                 startlabels.setLastUpdatedLabel(format);          //停止刷新                    refreshListView.onRefreshComplete();          setAdapter();               }          };           asyncTask.execute();       }        private String streamtoString(InputStream inputStream, String charset) {         try {         InputStreamReader inputStreamReader = new InputStreamReader(inputStream, charset);             BufferedReader bufferedReader = new BufferedReader(inputStreamReader);           String s= null;             StringBuilder builder = new StringBuilder();           while((s=bufferedReader.readLine())!=null){          builder.append(s);                }                return builder.toString();          } catch (Exception e) {        e.printStackTrace();           }        return charset;        }     }