RecycleView的使用方法

RecycleView是5.0推出的新特性，它的功能比listView更加的强大。现在很多的App都已经使用RecycleView。下面介绍下它的基本用法。

1.在布局文件中设置

<?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:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.recycleviewdemo.MainActivity">    <android.support.v7.widget.RecyclerView        android:layout_width="match_parent"        android:layout_height="120dp"        android:layout_centerVertical="true"        android:background="#FF0000"        android:scrollbars="none"        android:id="@+id/id_recyclerview_horizotal"        /></RelativeLayout>

2.在MainActivity中进行初始化

package com.example.recycleviewdemo;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.Toast;import java.util.ArrayList;import java.util.Arrays;import java.util.List;public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;    private GalleryAdapter mAdapter;    private List<Integer> mDatas;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initDatas();        //得到控件        mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview_horizotal);        //设置布局管理器        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);//线性布局管理器        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);        //实现GridView的布局效果new GridLayoutManager(this,num);中第一个参数是上下文，第二个参数是行列数      //  GridLayoutManager gridLayoutManager = new GridLayoutManager(this,4);       //实现瀑布流的效果,第一个参数是列数，第二个参数是方向        // StaggeredGridLayoutManager staggeredGridLayoutManager=new StaggeredGridLayoutManager(2,LinearLayoutManager.VERTICAL);        mRecyclerView.setLayoutManager(linearLayoutManager);        //设置适配器        mAdapter = new GalleryAdapter(this, mDatas);        mAdapter.setOnItemClickListener(new GalleryAdapter.OnItemClickListener() {            @Override            public void onItemClick(View view, int position) {                Toast.makeText(MainActivity.this, position+"", Toast.LENGTH_SHORT).show();            }        });        mRecyclerView.setAdapter(mAdapter);    }    private void initDatas() {        mDatas=new ArrayList<Integer>(Arrays.asList(R.drawable.recommend_30,R.drawable.recommend_31,                R.drawable.recommend_32,R.drawable.recommend_33,R.drawable.recommend_34,                R.drawable.recommend_35,R.drawable.recommend_36,R.drawable.recommend_37,                R.drawable.recommend_38                ));    }}

3.创建适配器

package com.example.recycleviewdemo;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;import java.util.List;/** * Created by Administrator on 2016/10/7. */public class GalleryAdapter extends RecyclerView.Adapter <GalleryAdapter.ViewHolder>{    private LayoutInflater mInflater;    private List<Integer> mDatas;    /**     *     * @param context     * @param datas     */    public GalleryAdapter(Context context,List<Integer> datas) {        mInflater = LayoutInflater.from(context);        mDatas = datas;    }    /**     * ItemClick的回调接口     *     */    private OnItemClickListener mOnItemClickListener;    public void setOnItemClickListener(OnItemClickListener onItemClickListener) {        this.mOnItemClickListener = onItemClickListener;    }    public interface OnItemClickListener{        void onItemClick(View view, int position);    }    public static class ViewHolder extends RecyclerView.ViewHolder{        public ViewHolder(View itemView) {            super(itemView);        }        ImageView mImageView;        TextView mTextView;    }    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view;        view = mInflater.inflate(R.layout.item_recycler, parent, false);        ViewHolder viewHolder = new ViewHolder(view);        viewHolder.mImageView = (ImageView) view.findViewById(R.id.id_index_gallery_item_iamge);        return viewHolder;    }    @Override    public void onBindViewHolder(final ViewHolder viewHolder,final  int position) {        viewHolder.mImageView.setImageResource(mDatas.get(position));        //如果设置了回调，则设置点击事件        if (mOnItemClickListener!=null){            viewHolder.itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    mOnItemClickListener.onItemClick(viewHolder.itemView,position);                }            });        }    }    @Override    public int getItemCount() {        return mDatas.size();    }}
adapter的item
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:layout_width="match_parent"              android:layout_height="120dp">    <ImageView        android:id="@+id/id_index_gallery_item_iamge"        android:layout_width="match_parent"        android:layout_height="100dp"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_margin="5dp"        android:scaleType="centerCrop"        />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@id/id_index_gallery_item_iamge"        android:layout_centerHorizontal="true"        android:layout_marginBottom="5dp"        android:layout_marginTop="5dp"        android:textColor="#ff0000"        android:text="some info"        android:textSize="12dp"        /></RelativeLayout>
然后运行到模拟器上.就可以看到recycleView实现的简单效果