加頭加尾

ce.gif

加頭加尾比較簡單，不過我這里用了另一種方法，優(yōu)化上可能不足，單總歸是一種方法丝里，大致邏輯：
總布局單拎一個recyclerView,itemviewType 為2，0為頭部（上圖中的收貨地址）体谒，1為商品信息和底部杯聚，其中type=1時的viewholder中的布局包含有一個固定高度的listview和一個底部（具體展示為評論），然后再為listview做適配抒痒。

總adapter代碼如下：

    @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;
    }

總布局xml如下(去掉標(biāo)題和根布局之后的)：

    @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;
    }

總布局xml如下(去掉標(biāo)題和根布局之后的)：

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <LinearLayout
            android:paddingBottom="@dimen/w_dp_55"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <android.support.v7.widget.RecyclerView
                android:id="@+id/shopcar_createOrder_Goods_recyclerView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
            <View
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/shopcar_item_divider"/>

        </LinearLayout>
        <LinearLayout
            android:layout_alignParentBottom="true"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <View
                android:layout_alignTop="@+id/toCreateOrder_submit_layout"
                android:layout_width="match_parent"
                android:layout_height="@dimen/w_dp_1"
                android:background="@color/shopcar_edit_layout_divider"/>
            <RelativeLayout
                android:id="@+id/toCreateOrder_submit_layout"
                android:layout_width="match_parent"
                android:layout_height="@dimen/w_dp_55"
                android:background="@color/bg_white">

                <TextView
                    android:id="@+id/shopcar_submit_order"
                    android:layout_width="@dimen/w_dp_120"
                    android:layout_height="match_parent"
                    android:layout_alignParentRight="true"
                    android:background="@color/appRed"
                    android:gravity="center"
                    android:text="提交訂單"
                    android:textColor="@color/white"
                    android:textSize="18sp" />

                <LinearLayout
                    android:id="@+id/shopcar_createOrder_money"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:layout_marginRight="@dimen/w_dp_20"
                    android:layout_toLeftOf="@+id/shopcar_submit_order"
                    android:gravity="center_vertical"
                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/shopcar_createOrder_AllPrice_priceFirst"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="￥6999."
                        android:textColor="@color/appRed"
                        android:textSize="17sp" />

                    <TextView
                        android:id="@+id/shopcar_createOrder_AllPrice_priceTail"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="00"
                        android:textColor="@color/appRed"
                        android:textSize="14sp" />
                </LinearLayout>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:layout_toLeftOf="@+id/shopcar_createOrder_money"
                    android:gravity="center_vertical"
                    android:text="合計(jì)："
                    android:textColor="@color/black"
                    android:textSize="17sp" />
            </RelativeLayout>
        </LinearLayout>
    </RelativeLayout>

商品列的viewholder代碼如下：

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  小計(jì)：");

    }
}

其中起作用的代碼只有

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

再來看此viewholder的xml文件：

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <com.feihong.txgw.view.NoScrollListView
            android:id="@+id/shopcar_order_goods_info_lv"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/bg_white" />
        <LinearLayout
            android:background="@color/bg_white"
            android:paddingRight="@dimen/w_dp_13"
            android:paddingLeft="@dimen/w_dp_13"
            android:paddingTop="@dimen/w_dp_5"
            android:layout_width="match_parent"
            android:layout_height="@dimen/w_dp_83"
            android:visibility="visible"
            android:orientation="horizontal">
            <TextView
                android:textSize="15sp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="買家留言:"/>
            <EditText
                android:gravity="top|left"
                android:maxLines="3"
                android:padding="5dp"
                android:layout_marginLeft="@dimen/w_dp_3"
                android:id="@+id/shopcar_createrOrder_lea_msg"
                android:textSize="14sp"
                android:background="@null"
                android:textColorHint="#cfcdcd"
                android:hint="對本次交易的說明"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />
        </LinearLayout>
        <View
            android:layout_width="match_parent"
            android:layout_height="@dimen/w_dp_1"
            android:background="@color/shopcar_edit_layout_divider"/>
        <RelativeLayout
            android:background="@color/bg_white"
            android:gravity="center_vertical"
            android:layout_width="match_parent"
            android:layout_height="@dimen/w_dp_45">
            <TextView
                android:layout_toLeftOf="@+id/shopcar_createOrder_Goods_price_allCount"
                android:id="@+id/shopcar_createOrder_Goods_price_count"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="共計(jì)1件商品  小計(jì)："/>
            <TextView
                android:layout_alignParentRight="true"
                android:id="@+id/shopcar_createOrder_Goods_price_allCount"
                android:textColor="@color/appRed"
                android:text="￥6999.00"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
        </RelativeLayout>
    </LinearLayout>

一個自定義的固定listview加評論底部幌绍，簡單的加頭加尾到此完成

recycleView列表中有多種的數(shù)據(jù)集

20170910150502071359b4cb293ef80.gif

有時候會遇到一個列表中有多種itemviewType的情況，常用的方法就是根據(jù)數(shù)據(jù)集的position來判斷 然后返回我們設(shè)置的類型故响，以上圖購物車的內(nèi)容為例傀广，圖中有三種類型的布局，其中中間的那種是我臨時加上去的彩届，邏輯：
主布局：recyclerView
主adapter：根據(jù)數(shù)據(jù)的類型分類 我這里分為了三類 正常商品 失效商品1 失效商品2 伪冰， 跳過正常商品 ， 失效商品1 占有一個type 類似于上面的加尾 也直接跳過
失效商品2 占有兩個type 分別是 失效商品的標(biāo)題 和 失效商品的列表展示
ps：失效商品1對應(yīng)圖中商品的最后 失效商品2對應(yīng)的是購物車列表的中間商品
正常商品 對應(yīng)購物車商品的最上面的商品

失效商品1的布局：定長的listview和標(biāo)題
失效商品2的布局同正常商品的布局一樣
失效商品2的標(biāo)題布局 hhh~~
代碼如下：
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: 購物車適配器
 * @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<>();
    }
    /**
     * 清空數(shù)據(jù)
     */
    public void setClearData(){
        mGoodsList.clear();
        mNormalGoods.clear();
        mFailureGoods.clear();
        mFailure2Goods.clear();
        notifyDataSetChanged();
    }
    /**
     * 添加數(shù)據(jù)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();
    }

    /**
     * 添加單條數(shù)據(jù)
     * @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", "過期商品: "+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;  // 商品名稱 價格
        private TextView mItemGoodsCountAdd,mItemGoodsCountSubtract;  // 商品數(shù)量添加減少
        private TextView mItemGoodsCount;  // 商品數(shù)量
        private TextView mItemGoodsPriceRemainder; // 價格后綴
        private TextView mItemGoodsDescribe;  // 商品描述
        private ImageView mItemGoodsImg; // 商品縮略圖

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

        }
    }
}

ps：因?yàn)槠脑?將一些不必要的邏輯代碼去掉了 這些代碼純屬項(xiàng)目中的邏輯處理樟蠕，并不影響本篇文章
失效商品1和失效商品2的viewholder 都是一些布局的實(shí)例化或者是listview的適配 所以這里也就不貼出來了

最后貼上定長的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
    /**
     * 重寫該方法贮聂，達(dá)到使ListView適應(yīng)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);
    }

}