首先需要匯入依賴和開啟許可權

implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.github.bumptech.glide:glide:4.8.0'

開啟許可權

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

效果圖

Activity程式碼

package com.example.recyclerview.activity;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.support.v7.widget.RecyclerView;

import com.example.recyclerview.R;
import com.example.recyclerview.User;
import com.example.recyclerview.adapter.OneAdapter;

public class OneActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //①類似於ListView的linearLayoutManager的線性佈局，水平排練:橫向滑動ScrollView
        //②類似於GridView的網格佈局
        //三。瀑布流StaggeredGridLayoutManager羅列混排佈局

        RecyclerView recyclerView = findViewById(R.id.recyclerview);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(OrientationHelper.VERTICAL);
//設定佈局管理器
        recyclerView.setLayoutManager(layoutManager);
//設定為垂直佈局，這也是預設的

        OneAdapter normalAdapter = new OneAdapter();

        for (int i = 0; i < 10; i++) {
            User user = new User();
            user.setName("張"+i);
            normalAdapter.addItem(user);
        }

//設定Adapter
        recyclerView.setAdapter(normalAdapter);
        //設定分隔線
//        recyclerView.addItemDecoration( new DividerGridItemDecoration(this ));
//設定增加或刪除條目的動畫
        recyclerView.setItemAnimator( new DefaultItemAnimator());
    }
}
 

對應的xml程式碼

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </android.support.v7.widget.RecyclerView>

</LinearLayout>
 

Adapter程式碼

package com.example.recyclerview.adapter;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.recyclerview.R;
import com.example.recyclerview.User;

import java.util.ArrayList;
import java.util.List;

public class OneAdapter extends RecyclerView.Adapter<OneAdapter.VH> {
    public void addItem(User user) {
        if (user != null)
            mDatas.add(user);
    }

    //② 建立ViewHolder
    public static class VH extends RecyclerView.ViewHolder {
        public final TextView title;
        public final ImageView avatar;

        public VH(View v) {
            super(v);
            title = v.findViewById(R.id.title);
            avatar = v.findViewById(R.id.avatar);
        }
    }

    private List<User> mDatas;

    public OneAdapter() {
        this.mDatas = new ArrayList<>();
    }

    //③ 在Adapter中實現3個方法
    @Override
    public void onBindViewHolder(VH holder, int position) {
        User user = mDatas.get(position);
        holder.title.setText(user.getName());
//        holder.avatar.setImageResource(user.getName());
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //item 點選事件
            }
        });
    }

    @Override
    public int getItemCount() {
        return mDatas.size();
    }

    @Override
    public VH onCreateViewHolder(ViewGroup parent, int viewType) {
        //LayoutInflater.from指定寫法
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.one, parent, false);
        return new VH(v);
    }
}

adapter對應的xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <ImageView
        android:id="@+id/avatar"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center_vertical"/>

</LinearLayout>