Android RecyclerView横向滑动

android.support.v7.widget.RecyclerView


功能：RecyclerView横向滑动


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


Java类：RecyclerView、GalleryAdapter、List<Integer>

1、主界面布局

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.info.activity.RecyclerActivity">

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

2、子界面布局

<?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">

    <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="#000000"
        android:text="some info"
        android:textSize="12dp" />
</RelativeLayout>

3、Java代码

package com.info.activity;

import android.app.Activity;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
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.ArrayList;
import java.util.Arrays;
import java.util.List;

public class RecyclerActivity extends Activity {

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


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycler);

        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 GalleryAdapter(this, mDatas);
        mRecyclerView.setAdapter(mAdapter);
    }

    private void initDatas()
    {
        mDatas = new ArrayList<>(Arrays.asList(R.drawable.ic_launcher,
                R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
                R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher));
    }

    public class GalleryAdapter extends
            RecyclerView.Adapter<GalleryAdapter.ViewHolder>
    {
        private LayoutInflater mInflater;
        private List<Integer> mDatas;

        public GalleryAdapter(Context context, List<Integer> datats)
        {
            mInflater = LayoutInflater.from(context);
            mDatas = datats;
        }

        public class ViewHolder extends RecyclerView.ViewHolder
        {
            public ViewHolder(View arg0)
            {
                super(arg0);
            }

            ImageView mImg;
            TextView mTxt;
        }

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

        /**
         * 创建ViewHolder
         */
        @Override
        public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i)
        {
            View view = mInflater.inflate(R.layout.activity_recycler_item,
                    viewGroup, false);
            ViewHolder viewHolder = new ViewHolder(view);

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

        /**
         * 设置值
         */
        @Override
        public void onBindViewHolder(final ViewHolder viewHolder, final int i)
        {
            viewHolder.mImg.setImageResource(mDatas.get(i));
        }

    }
}