recyclerview多布局

加头加尾

ce.gif

加头加尾比较简单，不过我这里用了另一种方法，优化上可能不足，单总归是一种方法，大致逻辑：
总布局单拎一个recyclerView,itemviewType 为2，0为头部（上图中的收货地址），1为商品信息和底部，其中type=1时的viewholder中的布局包含有一个固定高度的listview和一个底部（具体展示为评论），然后再为listview做适配。

总adapter代码如下：


    @Override
    public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if(viewType == TYPE_HEAD) return new CreateOrderGoodsHeadViewHolder(LayoutInflater.from(mContext).inflate(R.layout.shopcar_createorder_recycler_head_layout,parent,false));
        else return new CreateOrderGoodsViewHolder(LayoutInflater.from(mContext).inflate(R.layout.shopcar_create_order_goods_list_layout,parent,false),mContext);
    }

    @Override
    public void onBindViewHolder(BaseViewHolder holder, int position) {
        if(getItemViewType(position) == TYPE_LIST){
            CreateOrderGoodsViewHolder mHolder = (CreateOrderGoodsViewHolder) holder;
            mHolder.initData(mGoodsList);
            mHolder.mLeaveMsg.addTextChangedListener(new EditChangedListener(position - 1));
        }else if(getItemViewType(position) == TYPE_HEAD){
            CreateOrderGoodsHeadViewHolder mHolder = (CreateOrderGoodsHeadViewHolder) holder;
            mHolder.mAdrView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent(mContext, MyDeliveryAdrActivity.class);
                    intent.putExtra("intentType","createOrder");
                    mContext.startActivityForResult(intent,10);
                }
            });
        }
    }
   
 @Override
    public int getItemCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        if(position == 0) return TYPE_HEAD;
        else return TYPE_LIST;
    }

总布局xml如下(去掉标题和根布局之后的)：


    @Override
    public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if(viewType == TYPE_HEAD) return new CreateOrderGoodsHeadViewHolder(LayoutInflater.from(mContext).inflate(R.layout.shopcar_createorder_recycler_head_layout,parent,false));
        else return new CreateOrderGoodsViewHolder(LayoutInflater.from(mContext).inflate(R.layout.shopcar_create_order_goods_list_layout,parent,false),mContext);
    }

    @Override
    public void onBindViewHolder(BaseViewHolder holder, int position) {
        if(getItemViewType(position) == TYPE_LIST){
            CreateOrderGoodsViewHolder mHolder = (CreateOrderGoodsViewHolder) holder;
            mHolder.initData(mGoodsList);
            mHolder.mLeaveMsg.addTextChangedListener(new EditChangedListener(position - 1));
        }else if(getItemViewType(position) == TYPE_HEAD){
            CreateOrderGoodsHeadViewHolder mHolder = (CreateOrderGoodsHeadViewHolder) holder;
            mHolder.mAdrView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent(mContext, MyDeliveryAdrActivity.class);
                    intent.putExtra("intentType","createOrder");
                    mContext.startActivityForResult(intent,10);
                }
            });
        }
    }
   
 @Override
    public int getItemCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        if(position == 0) return TYPE_HEAD;
        else return TYPE_LIST;
    }

总布局xml如下(去掉标题和根布局之后的)：

商品列的viewholder代码如下：

public class CreateOrderGoodsViewHolder extends BaseViewHolder {

    public NoScrollListView mListView;
    public EditText mLeaveMsg;
    private ShopCarOrderGoodsAdapter mAdapter;
    private Context mContext;
    private List dbGoodsCartModels;
        public TextView mPrice_GoodsCount;
        public TextView mPrice_GoodsPrice;

    public CreateOrderGoodsViewHolder(View itemView, Context context) {
        super(itemView);
        mContext = context;
        mListView = (NoScrollListView) itemView.findViewById(R.id.shopcar_order_goods_info_lv);
        mLeaveMsg = (EditText) itemView.findViewById(R.id.shopcar_createrOrder_lea_msg);
            mPrice_GoodsCount = (TextView) itemView.findViewById(R.id.shopcar_createOrder_Goods_price_count);
            mPrice_GoodsPrice = (TextView) itemView.findViewById(R.id.shopcar_createOrder_Goods_price_allCount);
        mAdapter = new ShopCarOrderGoodsAdapter(mContext);
        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {

                if (dbGoodsCartModels != null) {
                    Intent intent = new Intent();
                    intent.setClass(mContext, ProductInfoActivity.class);
                    intent.putExtra(ProductInfoActivity.INTENT_PRODUCTID, dbGoodsCartModels.get(position).getGoodsId()+"");
                    mContext.startActivity(intent);

                }
            }
        });
    }

    public void initData(List dbGoodsCartModels) {
        if (dbGoodsCartModels == null || dbGoodsCartModels.size() < 1) {
            return;
        }
        this.dbGoodsCartModels = dbGoodsCartModels;
        mListView.setAdapter(mAdapter);
        mAdapter.setData(dbGoodsCartModels);

        double allPrice = 0 ;
        int allNumGoods = 0 ;
        String strAllPrice = null;

        BigDecimal one = new BigDecimal("1");
        DecimalFormat df = new DecimalFormat("######0.00");
        for(DbGoodsCartModel dbGoodsCartModel : dbGoodsCartModels){
            allNumGoods += dbGoodsCartModel.getGoogdsnum();
            BigDecimal a1 = new BigDecimal(Double.toString(dbGoodsCartModel.getGoodsprice()));
            BigDecimal a2 = new BigDecimal(Double.toString(dbGoodsCartModel.getGoogdsnum()));
            BigDecimal result = a1.multiply(a2);
            allPrice += result.divide(one,2,BigDecimal.ROUND_HALF_UP).doubleValue();
        }
            strAllPrice  = df.format(allPrice);
            mPrice_GoodsPrice.setText("￥"+strAllPrice);
            mPrice_GoodsCount.setText("共"+allNumGoods+"件商品  小计：");

    }
}

其中起作用的代码只有

        mListView.setAdapter(mAdapter);
        mAdapter.setData(dbGoodsCartModels);

再来看此viewholder的xml文件：

一个自定义的固定listview加评论底部，简单的加头加尾到此完成

recycleView列表中有多种的数据集

20170910150502071359b4cb293ef80.gif

有时候会遇到一个列表中有多种itemviewType的情况，常用的方法就是根据数据集的position来判断然后返回我们设置的类型，以上图购物车的内容为例，图中有三种类型的布局，其中中间的那种是我临时加上去的，逻辑：
主布局：recyclerView
主adapter：根据数据的类型分类我这里分为了三类正常商品失效商品1 失效商品2 ，跳过正常商品，失效商品1 占有一个type 类似于上面的加尾也直接跳过
失效商品2 占有两个type 分别是失效商品的标题和失效商品的列表展示
ps：失效商品1对应图中商品的最后失效商品2对应的是购物车列表的中间商品
正常商品对应购物车商品的最上面的商品

失效商品1的布局：定长的listview和标题
失效商品2的布局同正常商品的布局一样
失效商品2的标题布局 hhh~~
代码如下：
主布局：

主adapter：

package com.feihong.txgw.shopcar.adapter;

import android.content.Context;
import android.content.Intent;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.feihong.txgw.R;
import com.feihong.txgw.activity.base.BaseActivity;
import com.feihong.txgw.activity.product.ProductInfoActivity;
import com.feihong.txgw.adapter.Holder.BaseViewHolder;
import com.feihong.txgw.db.DbGoodsCartModel;
import com.feihong.txgw.shopcar.listener.GoodsCountChangeListener;
import com.feihong.txgw.shopcar.listener.GoodsSelectStatusListener;
import com.feihong.txgw.shopcar.listener.OnDelFailureGoodsListener;
import com.feihong.txgw.shopcar.viewholder.ShopCarFail2DevieViewHolder;
import com.feihong.txgw.shopcar.viewholder.ShopcarFailure2ViewHolder;
import com.feihong.txgw.shopcar.viewholder.ShopcarFailureGoodsShowViewHolder;
import com.feihong.txgw.shopcar.viewholder.ShopcarFailureGoodsViewHolder;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * @name txgw_app
 * @class name：com.shopcar.adapter
 * @class describe: 购物车适配器
 * @time 2017/6/29 13:23
 * @change
 * @chang time
 * @class describe
 */
public class ShopCarAdapter extends RecyclerView.Adapter {

    private BaseActivity mContext;
    private ArrayList mGoodsList;
    private GoodsSelectStatusListener mGoodsSelectStatusListener;

    private ArrayList mFailureGoods;
    private ArrayList mNormalGoods;
    private ArrayList mFailure2Goods;
    private final int FAILURE_GOODS = 0;
    private final int NORMAL_GOODS = 1;
    private final int FAILURE_2_GOODS = 3;
    private final int FAILURE_2_GOODS_DEVIDE = 4;

    public ShopCarAdapter(Context context){
        mContext = (BaseActivity) context;
        mGoodsList = new ArrayList<>();
        mFailureGoods = new ArrayList<>();
        mNormalGoods = new ArrayList<>();
        mFailure2Goods = new ArrayList<>();
    }
    /**
     * 清空数据
     */
    public void setClearData(){
        mGoodsList.clear();
        mNormalGoods.clear();
        mFailureGoods.clear();
        mFailure2Goods.clear();
        notifyDataSetChanged();
    }
    /**
     * 添加数据集合
     * @param goodsList
     */
    public void setGoodsList(List goodsList){
        mGoodsList.addAll(goodsList);
        Log.i("wangzi", "adapter  setGoodslist: "+mGoodsList.size()+"  " +goodsList.size());
        for(DbGoodsCartModel dbGoodsCartModel : goodsList){
            if(dbGoodsCartModel.getGoodsStatus() == 0)
                mFailureGoods.add(dbGoodsCartModel);
            else if(dbGoodsCartModel.getGoodsStatus() == -1)
                mFailure2Goods.add(dbGoodsCartModel);
            else
                mNormalGoods.add(dbGoodsCartModel);
        }
        notifyDataSetChanged();
    }

    /**
     * 添加单条数据
     * @param goods
     */
    public void setGoods(DbGoodsCartModel goods){
        mGoodsList.add(goods);
        //mGoodsList
        notifyDataSetChanged();
    }
    @Override
    public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if(viewType == NORMAL_GOODS)
            return new ShopCarViewHolder(LayoutInflater.from(mContext).inflate(R.layout.shopcar_item_layout,parent,false));
        else if (viewType == FAILURE_GOODS)
            return new ShopcarFailureGoodsShowViewHolder(mContext,LayoutInflater.from(mContext).inflate(R.layout.shop_car_fail_lv_layout,parent,false));
        else if(viewType == FAILURE_2_GOODS_DEVIDE)
            return new ShopCarFail2DevieViewHolder(mContext,LayoutInflater.from(mContext).inflate(R.layout.shopcar_failure_2_devide_layout,parent,false));
        else if(viewType == FAILURE_2_GOODS)
            return new ShopcarFailure2ViewHolder(mContext,LayoutInflater.from(mContext).inflate(R.layout.shopcar_item_layout,parent,false));
        return null;
     }

    @Override
    public void onBindViewHolder(final BaseViewHolder holder, final int position) {
        if(getItemViewType(position) == NORMAL_GOODS){
           
        }else if(getItemViewType(position) == FAILURE_GOODS){
            Log.i("wangzi", "过期商品: "+mFailureGoods.size());
            ShopcarFailureGoodsShowViewHolder mHolder = (ShopcarFailureGoodsShowViewHolder) holder;
            mHolder.initData(mFailureGoods,mDelFailureGoodsListener);
        }
    }

    public static final String INTENT_PRODUCTID = "productID";

    @Override
    public int getItemCount() {
//        return mGoodsList.size();
        return mNormalGoods.size() + 1 + mFailure2Goods.size() + 1;
    }

    @Override
    public int getItemViewType(int position) {
        if(position < mNormalGoods.size())
            return NORMAL_GOODS;
        else if(position == mNormalGoods.size())
            return FAILURE_2_GOODS_DEVIDE;
        else if(mNormalGoods.size() < position  && position < mFailure2Goods.size() + mNormalGoods.size() + 1)
            return FAILURE_2_GOODS;
        else if(position >= mFailure2Goods.size() + mNormalGoods.size() + 1)
            return FAILURE_GOODS;
        return 0;
    }

    protected class ShopCarViewHolder extends BaseViewHolder {


        private ImageView mItemGoodsSelect;
        private TextView mItemGoodsName,mItemGoodsPrice;  // 商品名称 价格
        private TextView mItemGoodsCountAdd,mItemGoodsCountSubtract;  // 商品数量添加减少
        private TextView mItemGoodsCount;  // 商品数量
        private TextView mItemGoodsPriceRemainder; // 价格后缀
        private TextView mItemGoodsDescribe;  // 商品描述
        private ImageView mItemGoodsImg; // 商品缩略图

        public ShopCarViewHolder(View itemView) {
            super(itemView);

        }
    }
}

ps：因为篇幅的原因将一些不必要的逻辑代码去掉了这些代码纯属项目中的逻辑处理，并不影响本篇文章
失效商品1和失效商品2的viewholder 都是一些布局的实例化或者是listview的适配所以这里也就不贴出来了

最后贴上定长的listview


public class NoScrollListView extends ListView {

    public NoScrollListView(Context context) {
        super(context);
    }

    public NoScrollListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NoScrollListView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public NoScrollListView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    /**
     * 重写该方法，达到使ListView适应ScrollView的效果
     */
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }

}

recyclerview多布局

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