关于recyclerview的横向布局的宽度以及item的点击事件的添加

来源：互联网发布：安道尔微信暗语知乎编辑：程序博客网时间：2024/05/16 01:47
package adapter;import android.annotation.TargetApi;import android.os.Build;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.ProgressBar;import android.widget.TextView;import com.example.lxy.yiyuangou.R;import java.util.ArrayList;import java.util.List;import vo.HotProduct;/** * Created by 栾先生 on 2016/5/11. */public class ListAdapter extends RecyclerView.Adapter<ListAdapter.ItemViewHolder> {    private int image[] = {R.drawable.home_btn_buy, R.drawable.home_btn_new, R.drawable.home_btn_show, R.drawable.home_btn_show, R.drawable.home_btn_show, R.drawable.home_btn_show};
//HotProduct是一个JavaBean类    private List<HotProduct> datas;    private OnItemClickListener mOnItemClickListener;    public ListAdapter() {        datas = new ArrayList<>();        for (int i = 1; i <= 6; i++) {            HotProduct hp = new HotProduct("价值:￥500" + i, "500", "1000", "500");            datas.add(hp);        }    }    /**     * 自定义viewholder     */    class ItemViewHolder extends RecyclerView.ViewHolder {        ImageView iv;        ProgressBar pb;        TextView money, yi, zong, sheng;        public ItemViewHolder(View v) {            super(v);            iv = (ImageView) v.findViewById(R.id.ren_iamge);            yi = (TextView) v.findViewById(R.id.ren_yican);            zong = (TextView) v.findViewById(R.id.ren_zong);            sheng = (TextView) v.findViewById(R.id.ren_sheng);            money = (TextView) v.findViewById(R.id.ren_money);            pb = (ProgressBar) v.findViewById(R.id.ren_pb);        }    }    @Override    public ListAdapter.ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        //这么添加布局，item中的marchparent将会失效//        ItemViewHolder v = new ItemViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.renqi_item, null));               // 这么做为自适应的item  随着item的大小变化而变化        ItemViewHolder v = new ItemViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.renqi_item, parent, false));        return v;    }    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)    @Override    public void onBindViewHolder(final ListAdapter.ItemViewHolder holder, int position) {        ItemViewHolder vh = (ItemViewHolder) holder;        vh.iv.setImageResource(image[position]);        vh.money.setText(datas.get(position).getMoney());        vh.yi.setText(datas.get(position).getYicanyu());        vh.zong.setText(datas.get(position).getZong());        vh.sheng.setText(datas.get(position).getSheng());        if (mOnItemClickListener != null) {            /**             * 这里加了判断，itemViewHolder.itemView.hasOnClickListeners()             * 目的是减少对象的创建，如果已经为view设置了click监听事件,就不用重复设置了             * 不然每次调用onBindViewHolder方法，都会创建两个监听事件对象，增加了内存的开销             */            if (!holder.itemView.hasOnClickListeners()) {//                                 Log.e("ListAdapter", "setOnClickListener");                holder.itemView.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View v) {                        int pos = holder.getPosition();                        mOnItemClickListener.onItemClick(v, pos);                    }                });                holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {                    @Override                    public boolean onLongClick(View v) {                        int pos = holder.getPosition();                        mOnItemClickListener.onItemLongClick(v, pos);                        return true;                    }                });            }        }    }    @Override    public int getItemCount() {        return image.length;    }    public void setOnItemClickListener(OnItemClickListener mOnItemClickListener) {        this.mOnItemClickListener = mOnItemClickListener;    }    /**     * 处理item的点击事件和长按事件     */    public interface OnItemClickListener {         public void onItemClick(View view, int position);        public  void onItemLongClick(View view, int position);    }}
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