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