RecyclerView的基本用法

一：在activity_main.xml中引用RecyclerView控件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <android.support.v7.widget.RecyclerView
        android:id="@+id/id_recyclerview_horizontal"
        android:layout_width="match_parent"
        android:layout_height="120dp"
        android:layout_centerVertical="true"
        android:background="#FF0000"
        android:scrollbars="none" />

</RelativeLayout>

二： 创建待显示的条目布局item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="120dp"
    android:layout_height="120dp"
    android:background="#3A3D3E" >

    <ImageView
        android:id="@+id/id_index_gallery_item_image"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_margin="5dp"
        android:scaleType="centerCrop" />

    <TextView
        android:id="@+id/id_index_gallery_item_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/id_index_gallery_item_image"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        android:textColor="#ff0000"
        android:text="some info"
        android:textSize="12dp" />

</RelativeLayout>

三：创建RecyclerView的adapter

import java.util.List;
import android.content.Context;
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;

public class MyRecyclerViewAdapter extends
        RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder>
{

    private LayoutInflater mInflater;
    private List<Integer> mDatas;

    /**
     * 构造器
     * @param context
     * @param datats
     */
    public MyRecyclerViewAdapter(Context context, List<Integer> datats)
    {
        mInflater = LayoutInflater.from(context);
        mDatas = datats;
    }

    /**
     * 自己的ViewHolder必须继承RecyclerView.ViewHolder
     */
    public static class ViewHolder extends RecyclerView.ViewHolder
    {   //构造器参数是待显示的item的布局的view
        public ViewHolder(View arg0)
        {
            super(arg0);
        }

        ImageView mImg;
        TextView mTxt;
    }

    /**
     * 获取总的条目数
     * @return
     */
    @Override
    public int getItemCount()
    {
        return mDatas.size();
    }

    /**
     * 创建ViewHolder
     * viewHolder类似于ListView的convertView，同样类似于BaseAdapter的getView()方法
     */
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i)
    {
        View view = mInflater.inflate(R.layout.recyclerview_item,
                viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(view);

        viewHolder.mImg = (ImageView) view
                .findViewById(R.id.id_index_gallery_item_image);
        return viewHolder;
    }

    /**
     * 给各个item绑定数据
     */
    @Override
    public void onBindViewHolder(final ViewHolder viewHolder, final int i)
    {
        viewHolder.mImg.setImageResource(mDatas.get(i));
        if(mOnItemClickLitener != null){
            viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOnItemClickLitener.onItemClick(viewHolder.itemView,i);
                }
            });
        }
    }
    /**
     * ItemClick的回调接口
     * @author zhy
     *
     */
    public interface OnItemClickLitener
    {
        void onItemClick(View view, int position);
    }

    private OnItemClickLitener mOnItemClickLitener;

    public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener)
    {
        this.mOnItemClickLitener = mOnItemClickLitener;
    }
}

四：在Activity中使用RecyclerView

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private MyRecyclerViewAdapter mAdapter;
    private List<Integer> mDatas;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        initDatas();
        //得到控件
        mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview_horizontal);
        //设置布局管理器
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        mRecyclerView.setLayoutManager(linearLayoutManager);
        //设置适配器
        mAdapter = new MyRecyclerViewAdapter(this, mDatas);
        mAdapter.setOnItemClickLitener(new MyRecyclerViewAdapter.OnItemClickLitener() {
            @Override
            public void onItemClick(View view, int position) {
                Toast.makeText(MainActivity.this,"位置:"+position,Toast.LENGTH_SHORT).show();
            }
        });
        mRecyclerView.setAdapter(mAdapter);
    }
    private void initDatas()
    {
        mDatas = new ArrayList<Integer>(Arrays.asList(R.drawable.a,
                R.drawable.b, R.drawable.c, R.drawable.d, R.drawable.e,
                R.drawable.f, R.drawable.g, R.drawable.h, R.drawable.l));
    }

}

注：代码来自于网络