RecyclerView简单的实例

温故而知新，献上一段郭神的RecyclerView供大家参考

一个Fruit

public class Fruit {    private String name;    public Fruit(String name) {        this.name = name;    }    public String getName() {        return name;    }

Fruit的布局文件

<?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"><TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:id="@+id/fruit_name"    android:gravity="center_vertical"    android:layout_marginLeft="10dp"/></LinearLayout>

一个FruitAdapter

import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import java.util.List;/** * Created by Dam on 2017/9/19. */public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> {    private List<Fruit> mFruitList;    static class ViewHolder extends RecyclerView.ViewHolder {            TextView fruitName;        public ViewHolder(View view) {                       //参数view为RecycleView子项的最外层布局，可以从findviewbyid获取布局中的TextView实例            super(view);            fruitName = (TextView)view.findViewById(R.id.fruit_name);        }    }    public FruitAdapter(List<Fruit> fruitList) {                                        //把要展示的数据源传进来并赋值给全局变量mFruitList        mFruitList = fruitList;    }    @Override       //用于创建ViewHolder实例    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.fruit_item, parent, false);//将布局加载进来传入构造函数，创建ViewHolder实例        ViewHolder holder = new ViewHolder(view);        return holder;                                  //将ViewHolder实例返回    }    @Override       //用于对RecyclerView子项的数据进行赋值，在每个子项被滚动到屏幕内时执行    public void onBindViewHolder(ViewHolder holder, int position) {        Fruit fruit = mFruitList.get(position);          //通过position得到当前项的Fruit实例        holder.fruitName.setText(fruit.getName());      //将数据设置到ViewHolder的TextView中    }    @Override    public int getItemCount() {         //告诉RecyclerView有多少子项，直接返回数据源长度        return mFruitList.size();    }}

activity_main

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout 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"    tools:context="com.inclub.demo916.MainActivity"><android.support.v7.widget.RecyclerView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/recyclerview"></android.support.v7.widget.RecyclerView></android.support.constraint.ConstraintLayout>

MainAcitivity

import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private List<Fruit> fruitList = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initFruits();                                                           //初始化水果数据        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);//获取RecyclerView实例        LinearLayoutManager manager = new LinearLayoutManager(this);        //LayoutManager用于指定RecyclerView布局(此处使用LinerlayoutManager，实现与ListView类似的效果        recyclerView.setLayoutManager(manager);                               //将LayoutManager设置到RecyclerView中        FruitAdapter adapter = new FruitAdapter(fruitList);             //将水果数据传入到FruitAdapter的构造函数中        recyclerView.setAdapter(adapter);                               //完成适配器设置    }    private void initFruits() {        for (int i = 0; i < 2; i++) {            Fruit apple0 = new Fruit("apple0");            fruitList.add(apple0);            Fruit apple1 = new Fruit("apple1");            fruitList.add(apple1);            Fruit apple2 = new Fruit("apple2");            fruitList.add(apple2);            Fruit apple3 = new Fruit("apple3");            fruitList.add(apple3);            Fruit apple4 = new Fruit("apple4");            fruitList.add(apple4);            Fruit apple5 = new Fruit("apple5");            fruitList.add(apple5);            Fruit apple6 = new Fruit("apple6");            fruitList.add(apple6);        }    }}