PullToRefreshGridView

<uses-permission android:name="android.permission.INTERNET"/><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

=============mainactivity===============================================

package wangaimin.bwie.com.example.lenovo.gridview;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.GridView;import com.google.gson.Gson;import com.handmark.pulltorefresh.library.ILoadingLayout;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshGridView;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.List;public class MainActivity extends AppCompatActivity {    private PullToRefreshGridView refreshGridView;    private int page_num = 1;    private List<DataDataBean.ResultsBean> list = new ArrayList<>();//记录当前展示的所有数据    private ILoadingLayout startLabels;    private GridViewAdapter gridViewAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        refreshGridView = (PullToRefreshGridView) findViewById(R.id.refresh_grid_view);        getDataFromNet();        //2.设置可以刷新的模式        refreshGridView.setMode(PullToRefreshBase.Mode.BOTH);        //3.设置刷新的时候展示的文字(状态)        startLabels = refreshGridView.getLoadingLayoutProxy(true, false);        startLabels.setPullLabel("下拉刷新");        startLabels.setRefreshingLabel("正在刷新...");        startLabels.setReleaseLabel("放开刷新");        ILoadingLayout endLabels = refreshGridView.getLoadingLayoutProxy(false, true);        endLabels.setPullLabel("上拉刷新");        endLabels.setRefreshingLabel("正在载入...");        endLabels.setReleaseLabel("放开刷新...");        //4.设置下拉和上拉刷新的监听事件        refreshGridView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<GridView>() {            @Override            public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {                //下拉刷新....请求第一页的数据,清空之前的数据,然后再添加设置适配器                getRefreshData();            }            @Override            public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {                //上拉刷新/加载...加载的时候页数++                page_num++;                getDataFromNet();            }        });    }    private void getRefreshData() {        NetDataUtil.getData("http://gank.io/api/data/Android/10/1",MainActivity.this, new JsonCallBack() {            @Override            public void getJsonString(String json) {                //解析                Gson gson = new Gson();                DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);                //先清空一下数据                list.clear();                //添加到集合的最前边,,,,(0,,,,)                list.addAll(0,dataDataBean.getResults());                //设置适配器                setAdapter();                //设置适配器之后停止刷新的操作                refreshGridView.onRefreshComplete();                //可以设置刷新的时间....                startLabels.setLastUpdatedLabel("上次更新时间:"+new SimpleDateFormat("HH:mm").format(new Date(System.currentTimeMillis())));//last最近的,最后一次update修改/更新            }        });    }    private void setAdapter() {        if (gridViewAdapter == null){            gridViewAdapter = new GridViewAdapter(MainActivity.this,list);            refreshGridView.setAdapter(gridViewAdapter);        }else {            gridViewAdapter.notifyDataSetChanged();        }    }    private void getDataFromNet() {        //第一个参数是接口,第二个上下文,第三个回调json数据        NetDataUtil.getData("http://gank.io/api/data/Android/10/"+page_num,MainActivity.this, new JsonCallBack() {            @Override            public void getJsonString(String json) {                //解析                Gson gson = new Gson();                DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);                //往后面添加...                list.addAll(dataDataBean.getResults());                //设置适配器                setAdapter();                //停止刷新                refreshGridView.onRefreshComplete();            }        });    }}

=================activity_main=======================================================

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="wangaimin.bwie.com.example.lenovo.gridview.MainActivity">    <com.handmark.pulltorefresh.library.PullToRefreshGridView        xmlns:ptr="http://schemas.android.com/apk/res-auto"        android:layout_height="match_parent"        android:layout_width="match_parent"        android:numColumns="3"        android:id="@+id/refresh_grid_view"        ptr:ptrDrawable="@drawable/default_ptr_flip"        ptr:ptrAnimationStyle="flip"        ptr:ptrHeaderBackground="#383838"        ptr:ptrHeaderTextColor="#FFFFFF"  >    </com.handmark.pulltorefresh.library.PullToRefreshGridView></LinearLayout>

=============item_gridviewlayout=========================================================

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent">    <ImageView        android:id="@+id/grid_image"        android:src="@mipmap/ic_launcher"        android:layout_width="100dp"        android:layout_height="100dp" />    <TextView        android:id="@+id/grid_text"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>