Android RecyclerView实现横向滚动

我相信很久以前，大家在谈横向图片轮播是时候，优先会选择具有HorizontalScrollView效果和ViewPager来做，不过自从Google大会之后，系统为我们提供了另一个控件RecyclerView。RecyclerView是listview之后的又一利器，它可以实现高度的定制。今天就利用RecyclerView实现我们需要的相册效果。

先上一个图：

主要实现就是一个RecyclerView+RecyclerView.Adapter实现。

Activity的布局文件：

<android.support.v7.widget.RecyclerView  
       android:id="@+id/recycler_view"  
       android:layout_width="match_parent"  
       android:layout_height="wrap_content"  
       android:layout_centerVertical="true"  
       android:scrollbars="none" />  

我这里是自定义的控件，主要代码：

public class SimpleLinearLayout extends LinearLayout {  
  
    protected Context mContext;  
    protected View contentView;  
    protected AtomicBoolean isPreparingData;  
  
    public SimpleLinearLayout(Context context) {  
        super(context);  
        this.mContext = context;  
        isPreparingData = new AtomicBoolean(false);  
        initViews();  
    }  
  
    public SimpleLinearLayout(Context context, AttributeSet attrs) {  
        super(context, attrs);  
        this.mContext = context;  
        isPreparingData = new AtomicBoolean(false);  
        initViews();  
    }  
    protected void initViews() {  
  
    }  
}  

主页面代码：

public class SpeedHourView extends SimpleLinearLayout {  
  
    @BindView(R.id.recycler_view)  
    RecyclerView recyclerView;  
  
    private SpeedHourAdapter speedHourAdapter=null;  
    private SpeedHourEntity entity=null;  
  
    public SpeedHourView(Context context) {  
        this(context, null);  
    }  
  
    public SpeedHourView(Context context, AttributeSet attrs) {  
        super(context, attrs);  
    }  
  
    @Override  
    protected void initViews() {  
        contentView = inflate(mContext, R.layout.layout_speed_per_hour, this);  
        ButterKnife.bind(this);  
        init();  
    }  
  
    private void init() {  
        initData();  
        initView();  
        initAdapter();  
    }  
  
    private void initData() {  
        String data = FileUtils.readAssert(mContext, "speenhour.txt");  
        entity = JsonUtils.parseJson(data, SpeedHourEntity.class);  
    }  
  
    private void initView() {  
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);  
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);  
        recyclerView.setLayoutManager(linearLayoutManager);  
  
    }  
  
    private void initAdapter() {  
        speedHourAdapter=new SpeedHourAdapter(mContext);  
        recyclerView.setAdapter(speedHourAdapter);  
        if (entity!=null&&entity.topic!=null&&entity.topic.items!=null&&entity.topic.items.size()>0){  
            List<SpeedHourEntity.TopicBean.ItemsBean.ListBean> listBeen=entity.topic.items.get(0).list;  
             if (listBeen!=null&&listBeen.size()>0)  
             speedHourAdapter.setList(listBeen);  
        }  
  
        speedHourAdapter.setOnItemClickListener(new SpeedHourAdapter.OnItemClickListener() {  
            @Override  
            public void onItemClick(View view, int position) {  
                ProductDetailsActivity.open(mContext);  
            }  
        });  
    }  
  
    @OnClick(R.id.more_view)  
    public void moreClick() {  
        ToastUtils.showToast("更多时速达");  
    }  
}  

adapter布局：

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:ptr="http://schemas.android.com/apk/res-auto"  
    android:id="@+id/speed_view"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:orientation="vertical"  
    android:padding="10dp"  
    android:gravity="center">  
  
    <ImageView  
        android:id="@+id/speed_image"  
        android:layout_width="85dp"  
        android:layout_height="85dp"  
        android:scaleType="fitXY"  
         />  
  
    <TextView  
        android:id="@+id/speed_name"  
        style="@style/style_c6_s14"  
        android:layout_marginTop="5dp"  
        android:text="蜂蜜柚子茶"  
        android:maxLines="1"/>  
  
    <TextView  
        android:id="@+id/speed_price"  
        style="@style/style_c8_s14"  
        android:layout_marginTop="5dp"  
        android:text="￥30.0"  
        android:maxLength="6"  
        android:maxLines="1"/>  
</LinearLayout>  

adapter代码：

public class SpeedHourAdapter extends RecyclerView.Adapter<SpeedHourHolder> {  
  
    private List<ListBean> specailList;  
    private LayoutInflater mInflater;  
    private Context mContext=null;  
  
    public SpeedHourAdapter(Context context) {  
        this.mContext=context;  
        mInflater = LayoutInflater.from(context);  
    }  
  
    public void setList(List<ListBean> list) {  
        this.specailList = list;  
        notifyDataSetChanged();  
    }  
  
  
    public OnItemClickListener mOnItemClickListener;  
  
    public interface OnItemClickListener {  
        void onItemClick(View view, int position);  
    }  
  
    public void setOnItemClickListener(OnItemClickListener mOnItemClickLitener) {  
        this.mOnItemClickListener = mOnItemClickLitener;  
    }  
  
    @Override  
    public SpeedHourHolder onCreateViewHolder(ViewGroup parent, int viewType) {  
        View view = mInflater.inflate(R.layout.item_speedhour_layout, parent, false);  
  
        SpeedHourHolder holder = new SpeedHourHolder(view);  
        return holder;  
    }  
  
    @Override  
    public void onBindViewHolder(final SpeedHourHolder holder, final int position) {  
        ListBean bean = specailList.get(position);  
        if (bean != null) {  
            holder.speedImage.setScaleType(ImageView.ScaleType.FIT_XY);  
            Glide.with(mContext).load(bean.pic).error(R.drawable.welfare_default_icon).into(holder.speedImage);  
            holder.speedName.setText("同仁堂枸杞茶");  
            holder.speedPrice.setText("￥"+Math.random()*100);  
        }  
  
        holder.speedView.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View view) {  
              if (mOnItemClickListener!=null){  
                  mOnItemClickListener.onItemClick(holder.speedView,position);  
              }  
            }  
        });  
    }  
  
    @Override  
    public int getItemCount() {  
        return specailList.size();  
    }  
}  
  
  
class SpeedHourHolder extends RecyclerView.ViewHolder {  
  
    @BindView(R.id.speed_view)  
    LinearLayout speedView;  
    @BindView(R.id.speed_image)  
    ImageView speedImage;  
    @BindView(R.id.speed_name)  
    TextView speedName;  
    @BindView(R.id.speed_price)  
    TextView speedPrice;  
  
    public SpeedHourHolder(View itemView) {  
        super(itemView);  
        ButterKnife.bind(this,itemView);  
        itemView.setTag(this);  
    }  
  

代码中用到的实体类：

public class SpeedHourEntity {  
  
    public TopicBean topic;  
  
    public static class TopicBean {  
        public long nextupdatetime;  
        public List<ItemsBean> items;  
  
        public static class ItemsBean {  
            public int id;  
            public String theme;  
            public int products;  
            public int users;  
            public String href;  
            public boolean follow;  
            public int topictype;  
  
            public List<ListBean> list;  
  
            public static class ListBean {  
                public String id;  
                public int price;  
                public String pic;  
            }  
        }  
    }  
}