Android实现购物车效果_can overlap textview-1 if

MainActivity布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/top_bar"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:background="#E24146"
        android:orientation="vertical" >
        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:minHeight="48dp"
            android:text="购物车"
            android:textColor="#ffffff"
            android:textSize="17sp" />
    </LinearLayout>

    <ListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:childIndicator="@null"
        android:groupIndicator="@null" >
    </ListView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal" >

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="2.5"
            android:gravity="center_vertical"
            android:orientation="horizontal" >

            <CheckBox
                android:id="@+id/all_chekbox"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="4dp"
                android:button="@drawable/check_box_bg"
                android:checkMark="?android:attr/listChoiceIndicatorMultiple"
                android:gravity="center"
                android:minHeight="64dp"
                android:paddingLeft="10dp"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:visibility="visible" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:text="合计:"
                android:textSize="16sp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/tv_total_price"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="￥0.00"
                android:textColor="@color/purple"
                android:textSize="16sp"
                android:textStyle="bold" />
        </LinearLayout>

        <TextView
            android:id="@+id/tv_delete"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="@color/orange"
            android:clickable="true"
            android:gravity="center"
            android:text="删除"
            android:textColor="#FAFAFA" />

        <TextView
            android:id="@+id/tv_go_to_pay"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="#E24146"
            android:clickable="true"
            android:gravity="center"
            android:text="付款(0)"
            android:textColor="#FAFAFA" />
    </LinearLayout>

</LinearLayout>
-------------------------------------------------------------------
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;

public class MainActivity extends AppCompatActivity implements CartAdapter.RefreshPriceInterface ,View.OnClickListener{

    private ListView listView;
    private CheckBox cb_check_all;
    private TextView tv_total_price;
    private TextView tv_delete;
    private TextView tv_go_to_pay;

    private CartAdapter adapter;

    private double totalPrice = 0.00;
    private int totalCount = 0;
    private List<HashMap<String,String>> goodsList;

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

        initDate();
    }

    //控制价格展示
    private void priceControl(Map<String, Integer> pitchOnMap){
        totalCount = 0;
        totalPrice = 0.00;
        for(int i=0;i<goodsList.size();i++){
            if(pitchOnMap.get(goodsList.get(i).get("id"))==1){
                totalCount=totalCount+Integer.valueOf(goodsList.get(i).get("count"));
                double goodsPrice=Integer.valueOf(goodsList.get(i).get("count"))*Double.valueOf(goodsList.get(i).get("price"));
                totalPrice=totalPrice+goodsPrice;
            }
        }
        tv_total_price.setText("￥ "+totalPrice);
        tv_go_to_pay.setText("付款("+totalCount+")");
    }

    @Override
    public void refreshPrice(Map<String, Integer> pitchOnMap) {
        priceControl(pitchOnMap);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.all_chekbox:
                AllTheSelected();
                break;
            case R.id.tv_go_to_pay:
                if(totalCount<=0){
                    Toast.makeText(this,"请选择要付款的商品~",Toast.LENGTH_SHORT).show();
                    return;
                }
                Toast.makeText(this,"钱就是另一回事了~",Toast.LENGTH_SHORT).show();
                break;
            case R.id.tv_delete:
                if(totalCount<=0){
                    Toast.makeText(this,"请选择要删除的商品~",Toast.LENGTH_SHORT).show();
                    return;
                }
                checkDelete(adapter.getPitchOnMap());
                break;
        }
    }

    //删除操作
    private void checkDelete(Map<String,Integer> map){
        List<HashMap<String,String>> waitDeleteList=new ArrayList<>();
        Map<String,Integer> waitDeleteMap =new HashMap<>();
        for(int i=0;i<goodsList.size();i++){
            if(map.get(goodsList.get(i).get("id"))==1){
                waitDeleteList.add(goodsList.get(i));
                waitDeleteMap.put(goodsList.get(i).get("id"),map.get(goodsList.get(i).get("id")));
            }
        }
        goodsList.removeAll(waitDeleteList);
        map.remove(waitDeleteMap);
        priceControl(map);
        adapter.notifyDataSetChanged();
    }

    //全选或反选
    private void AllTheSelected(){
        Map<String,Integer> map=adapter.getPitchOnMap();
        boolean isCheck=false;
        boolean isUnCheck=false;
        Iterator iter = map.entrySet().iterator();
        while (iter.hasNext()) {
            Map.Entry entry = (Map.Entry) iter.next();
            if(Integer.valueOf(entry.getValue().toString())==1)isCheck=true;
            else isUnCheck=true;
        }
        if(isCheck==true&&isUnCheck==false){//已经全选,做反选
            for(int i=0;i<goodsList.size();i++){
                map.put(goodsList.get(i).get("id"),0);
            }
            cb_check_all.setChecked(false);
        }else if(isCheck==true && isUnCheck==true){//部分选择,做全选
            for(int i=0;i<goodsList.size();i++){
                map.put(goodsList.get(i).get("id"),1);
            }
            cb_check_all.setChecked(true);
        }else if(isCheck==false && isUnCheck==true){//一个没选,做全选
            for(int i=0;i<goodsList.size();i++){
                map.put(goodsList.get(i).get("id"),1);
            }
            cb_check_all.setChecked(true);
        }
        priceControl(map);
        adapter.setPitchOnMap(map);
        adapter.notifyDataSetChanged();
    }

    private void initView(){
        listView = (ListView) findViewById(R.id.listview);
        cb_check_all = (CheckBox) findViewById(R.id.all_chekbox);
        tv_total_price = (TextView) findViewById(R.id.tv_total_price);
        tv_delete = (TextView) findViewById(R.id.tv_delete);
        tv_go_to_pay = (TextView) findViewById(R.id.tv_go_to_pay);
        tv_go_to_pay.setOnClickListener(this);
        tv_delete.setOnClickListener(this);
        cb_check_all.setOnClickListener(this);

        adapter=new CartAdapter(this,goodsList);
        adapter.setRefreshPriceInterface(this);
        listView.setAdapter(adapter);
        adapter.notifyDataSetChanged();
    }

    private void initDate(){
        goodsList=new ArrayList<>();
        for(int i=0;i<10;i++){
            HashMap<String,String> map=new HashMap<>();
            map.put("id",(new Random().nextInt(10000)%(10000-2900+2900) + 2900)+"");
            map.put("name","购物车里的第"+(i+1)+"件商品");
            map.put("type",(i+20)+"码");
            map.put("price",(new Random().nextInt(100)%(100-29+29) + 29)+"");
            map.put("count",(new Random().nextInt(10)%(10-1+1) + 1)+"");
            goodsList.add(map);
        }

        initView();
    }
}
--------------------------------------------------------------------------------
CartAdapter布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#CCCCCC" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/page_backgroup"
        android:orientation="horizontal" >

        <CheckBox
            android:id="@+id/check_box"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="4dp"
            android:button="@drawable/check_box_bg"
            android:checkMark="?android:attr/listChoiceIndicatorMultiple"
            android:gravity="center"
            android:minHeight="64dp"
            android:minWidth="32dp"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:visibility="visible" />

        <ImageView
            android:id="@+id/iv_adapter_list_pic"
            android:layout_width="85dp"
            android:layout_height="85dp"
            android:layout_marginBottom="15dp"
            android:layout_marginTop="13dp"
            android:scaleType="centerCrop"
            android:src="@mipmap/good_icon" />

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="center_vertical"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="13dp" >

            <TextView
                android:id="@+id/tv_goods_name"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginRight="10dp"
                android:layout_marginTop="20dp"
                android:ellipsize="end"
                android:maxLines="2"
                android:textColor="@color/grey_color1"
                android:textSize="14sp" />

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_marginBottom="30dp"
                android:orientation="horizontal" >

                <TextView
                    android:id="@+id/tv_goods_price"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:singleLine="true"
                    android:textColor="@color/orange_color"
                    android:textSize="14sp"
                    android:textStyle="bold" />

                <TextView
                    android:id="@+id/tv_type_size"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:layout_marginLeft="10dp"
                    android:layout_toRightOf="@+id/tv_goods_price"
                    android:singleLine="true"
                    android:textColor="@color/grey_color3"
                    android:textSize="10sp"/>

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:layout_centerVertical="true"
                    android:layout_marginRight="15dp"
                    android:orientation="horizontal" >

                    <TextView
                        android:id="@+id/tv_reduce"
                        android:layout_width="25dp"
                        android:layout_height="25dp"
                        android:background="@drawable/text_angle_gray"
                        android:gravity="center"
                        android:text="一"
                        android:textColor="@color/grey_color1"
                        android:textSize="12sp" />

                    <TextView
                        android:id="@+id/tv_num"
                        android:layout_width="25dp"
                        android:layout_height="25dp"
                        android:background="@drawable/text_angle"
                        android:gravity="center"
                        android:singleLine="true"
                        android:text="1"
                        android:textColor="@color/grey_color1"
                        android:textSize="12sp" />

                    <TextView
                        android:id="@+id/tv_add"
                        android:layout_width="25dp"
                        android:layout_height="25dp"
                        android:background="@drawable/text_angle_right"
                        android:gravity="center"
                        android:text="+"
                        android:textColor="@color/grey_color1"
                        android:textSize="12sp" />
                </LinearLayout>
            </RelativeLayout>
        </RelativeLayout>
    </LinearLayout>

</LinearLayout>
----------------------------------------------------------------------------
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by lipeng
 * 2017/6/5.
 */

public class CartAdapter extends BaseAdapter {

    private Context context;
    private List<HashMap<String,String>> dataList;
    private ViewHolder vh;
    private Map<String,Integer> pitchOnMap;
    private RefreshPriceInterface refreshPriceInterface;

    public CartAdapter(Context context, List<HashMap<String,String>> list){
        this.context=context;
        this.dataList=list;

        pitchOnMap=new HashMap<>();
        for(int i=0;i<dataList.size();i++){
            pitchOnMap.put(dataList.get(i).get("id"),0);
        }
    }

    @Override
    public View getView(final int position, View view, ViewGroup viewGroup) {
        vh=new ViewHolder();
        if(view==null){
            view= LayoutInflater.from(context).inflate(R.layout.item_layout,null);

            vh.checkBox=(CheckBox)view.findViewById(R.id.check_box);
            vh.icon=(ImageView)view.findViewById(R.id.iv_adapter_list_pic);
            vh.name=(TextView)view.findViewById(R.id.tv_goods_name);
            vh.price=(TextView)view.findViewById(R.id.tv_goods_price);
            vh.type=(TextView)view.findViewById(R.id.tv_type_size);
            vh.num=(TextView)view.findViewById(R.id.tv_num);
            vh.reduce=(TextView)view.findViewById(R.id.tv_reduce);
            vh.add=(TextView)view.findViewById(R.id.tv_add);

            view.setTag(vh);
        }else {
            vh=(ViewHolder)view.getTag();
        }

        if(dataList.size()>0){

            if(pitchOnMap.get(dataList.get(position).get("id"))==0)vh.checkBox.setChecked(false);
            else vh.checkBox.setChecked(true);
            HashMap<String,String> map=dataList.get(position);
            vh.name.setText(map.get("name"));
            vh.num.setText(map.get("count"));
            vh.type.setText(map.get("type"));
            vh.price.setText("￥ "+(Double.valueOf(map.get("price")) * Integer.valueOf(map.get("count"))));

            vh.checkBox.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    final int index=position;
                    if(((CheckBox)view).isChecked())pitchOnMap.put(dataList.get(index).get("id"),1);else pitchOnMap.put(dataList.get(index).get("id"),0);
                    refreshPriceInterface.refreshPrice(pitchOnMap);
                }
            });
            vh.reduce.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    final int index=position;
                    dataList.get(index).put("count",(Integer.valueOf(dataList.get(index).get("count"))-1)+"");
                    if(Integer.valueOf(dataList.get(index).get("count"))<=0){
                        //可提示是否删除该商品,确定就remove,否则就保留1
                        String deID=dataList.get(index).get("id");
                        dataList.remove(index);
                        pitchOnMap.remove(deID);
                    }
                    notifyDataSetChanged();
                    refreshPriceInterface.refreshPrice(pitchOnMap);
                }
            });
            vh.add.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    final int index=position;
                    dataList.get(index).put("count",(Integer.valueOf(dataList.get(index).get("count"))+1)+"");
                    if(Integer.valueOf(dataList.get(index).get("count"))>15){
                        //15为库存可选择上限
                        Toast.makeText(context,"已达库存上限~",Toast.LENGTH_SHORT).show();
                        return;
                    }
                    notifyDataSetChanged();
                    refreshPriceInterface.refreshPrice(pitchOnMap);
                }
            });
        }

        return view;
    }

    public Map<String,Integer> getPitchOnMap(){
        return pitchOnMap;
    }
    public void setPitchOnMap(Map<String,Integer> pitchOnMap){
        this.pitchOnMap=new HashMap<>();
        this.pitchOnMap.putAll(pitchOnMap);
    }

    public interface RefreshPriceInterface{
        void refreshPrice(Map<String, Integer> pitchOnMap);
    }
    public void setRefreshPriceInterface(RefreshPriceInterface refreshPriceInterface){
        this.refreshPriceInterface=refreshPriceInterface;
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public int getCount() {
        if (dataList != null) {
            return dataList.size();
        } else {
            return 0;
        }
    }

    class ViewHolder{
        CheckBox checkBox;
        ImageView icon;
        TextView name,price,num,type,reduce,add;
    }
}

--------------------------------------------------------------