PullToRefreshGridView上拉刷新，下拉加载

PullToRefreshGridView上拉刷新，下拉加载

布局：

 <?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:id="@+id/activity_main"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.example.asus.pull_1.Activity.MainActivity">

    <com.handmark.pulltorefresh.library.PullToRefreshGridView
        android:id="@+id/gridview"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </com.handmark.pulltorefresh.library.PullToRefreshGridView>
 </RelativeLayout>

Activity:

 public class MainActivity extends AppCompatActivity {

     @BindView(R.id.gridview)
     PullToRefreshGridView gridview;
     private int index=1;
     private ArrayList<Bean.DataBean> list;
     private AdapterListe adapterListe;
     private Retrofit builder;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         ButterKnife.bind(this);
         gridview.setMode(PullToRefreshBase.Mode.BOTH);//能下拉刷新和上拉加载  
         init();
     }

     private void init() {
         list = new ArrayList();
         adapterListe = new AdapterListe(list, MainActivity.this);//适配器
         gridview.setAdapter(adapterListe);
         loadData(index);
         gridview.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<GridView>() {
            //刷新
             @Override
             public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {
                  list.clear();
                 loadData(1);
                 gridview.postDelayed(new Runnable() {
                     @Override
                     public void run() {
                         gridview.onRefreshComplete();//加载完成后，设置刷新完成
                     }
                 },1000);
             }
             //加载
             @Override
             public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {
                 index++;
                 list.clear();
                 loadData(index);
                 gridview.postDelayed(new Runnable() {
                     @Override
                     public void run() {
                         gridview.onRefreshComplete();//加载完成后，设置刷新完成
                     }
                 },1000);
             }
         });

     }

     private void loadData(int index) {
       //解析
         builder = new Retrofit.Builder()
                 .baseUrl("http://www.qubaobei.com/")
                 .addConverterFactory(GsonConverterFactory.create())
                 .build();
         builder.create(HttpCall.class).getHttpCall(""+index).enqueue(new Callback<Bean>() {
             @Override
             public void onResponse(Call<Bean> call, Response<Bean> response) {
                 list.addAll(response.body().getData());//把获取到的数据放到集合里
                 adapterListe.notifyDataSetChanged();//加载完成后，设置刷新完成
             }

             @Override
             public void onFailure(Call<Bean> call, Throwable t) {
                 Toast.makeText(MainActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
             }
         });
     }
 }

子布局：

 <?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="wrap_content">
     <TextView
         android:id="@+id/tv_title"
     android:layout_width="match_parent"
     android:layout_height="wrap_content" />
     <ImageView
         android:id="@+id/img"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
     <TextView
         android:id="@+id/tv_food_str"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
 </LinearLayout>

适配器：

 public class AdapterListe extends BaseAdapter{
     private List<Bean.DataBean> list;
     private Context context;

     public AdapterListe(List<Bean.DataBean> list, Context context) {
         this.list = list;
         this.context = context;
     }

     @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) {
         view = LayoutInflater.from(context).inflate(R.layout.layout, viewGroup, false);
         TextView tv_title,tv_food_str;
         ImageView img;
         tv_title=view.findViewById(R.id.tv_title);
         tv_food_str=view.findViewById(R.id.tv_food_str);
         img=view.findViewById(R.id.img);
         tv_title.setText(list.get(i).getTitle());
         tv_food_str.setText(list.get(i).getFood_str());
         Glide.with(context).load(list.get(i).getPic()).into(img);
         return view;
     }
 }

接口：

 public interface HttpCall {
     @GET("ios/cf/dish_list.php?stage_id=1&limit=10&page=")//注解（get）获取
     Call<Bean> getHttpCall(@Query("page")String page);//注解（@Query）字符串拼接
 }

Bean类就不发了记着加网络权限和Library包添加依赖