使用RxJava和Recyclerview實現購物車編輯刪除加減商品數量

原創 gh323093 2020-06-11 02:45

使用的依賴和權限

implementation 'com.squareup.okhttp3:okhttp:3.9.0'
implementation 'com.google.code.gson:gson:2.8.2'
implementation 'com.jakewharton:butterknife:8.8.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
implementation 'com.facebook.fresco:fresco:0.12.0'
// 支持 GIF 動圖，需要添加
implementation 'com.facebook.fresco:animated-gif:0.12.0'
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0'
implementation 'io.reactivex.rxjava2:rxjava:2.1.13'
implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
implementation 'com.google.dagger:dagger:2.8'
annotationProcessor 'com.google.dagger:dagger-compiler:2.7'
implementation 'com.squareup.retrofit2:converter-scalars:2.4.0'
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:support-v4:27.1.1'
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

 

activity_main

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

    <RelativeLayout
        android:padding="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:textSize="23sp"
            android:layout_centerVertical="true"
            android:text="＜"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TextView
            android:textStyle="bold"
            android:textSize="23sp"
            android:layout_centerHorizontal="true"
            android:text="購物車"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/bianji"
            android:textSize="20sp"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:text="編輯"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>

    <TextView
        android:layout_marginTop="5dp"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#D4D4D4"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_View"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <RelativeLayout
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:layout_alignParentBottom="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <CheckBox
            android:layout_marginLeft="10dp"
            android:layout_centerVertical="true"
            android:background="@drawable/shopcart_unselected"
            android:button="@null"
            android:id="@+id/quanxuan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TextView

            android:layout_centerVertical="true"
            android:textStyle="bold"
            android:layout_marginLeft="40dp"
            android:textSize="23sp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="全選"
            />

        <LinearLayout
            android:orientation="vertical"
            android:layout_centerInParent="true"
            android:layout_marginRight="70dp"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <TextView

                android:textColor="#e53e42"
                android:id="@+id/total_price"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:text="總價 : ¥0元"
                />

            <TextView
                android:layout_alignBottom="@+id/total_price"
                android:id="@+id/total_num"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:text="共0件商品"
                />

        </LinearLayout>

        <TextView
            android:id="@+id/quzhifu"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:padding="30dp"
            android:gravity="center"
            android:textSize="22sp"
            android:text="去支付"
            android:textColor="#fff"
            android:background="#FC7903"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <LinearLayout
            android:id="@+id/linear_shanchu"
            android:visibility="gone"
            android:layout_alignParentRight="true"
            android:layout_marginLeft="30dp"
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <TextView
                android:paddingRight="30dp"
                android:paddingLeft="30dp"
                android:padding="20dp"
                android:gravity="center"
                android:textSize="20sp"
                android:text="分享寶貝"
                android:textColor="#fff"
                android:background="#FC7903"
                android:layout_width="wrap_content"
                android:layout_height="match_parent" />
            <TextView
                android:paddingRight="30dp"
                android:paddingLeft="30dp"
                android:padding="20dp"
                android:gravity="center"
                android:textSize="20sp"
                android:text="移到收藏夾"
                android:textColor="#fff"
                android:background="#FC7903"
                android:layout_width="wrap_content"
                android:layout_height="match_parent" />
            <TextView
                android:id="@+id/shanchu"
                android:paddingRight="30dp"
                android:paddingLeft="30dp"
                android:padding="30dp"
                android:gravity="center"
                android:textSize="20sp"
                android:text="刪除"
                android:textColor="#fff"
                android:background="#DC143C"
                android:layout_width="wrap_content"
                android:layout_height="match_parent" />
        </LinearLayout>
    </RelativeLayout>

</LinearLayout>

custom_jiajian

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

    <Button
        android:background="#F2F1F1"
        android:textSize="20sp"
        android:id="@+id/reverse"
        android:text="一"
        android:layout_width="40dp"
        android:layout_height="40dp" />

    <EditText
        android:gravity="center"
        android:background="#FAFAFA"
        android:textStyle="bold"
        android:textSize="23sp"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:text="1"
        android:id="@+id/count" />

    <Button
        android:id="@+id/add"
        android:background="#F2F1F1"
        android:textSize="25sp"
        android:text="+"
        android:layout_width="40dp"
        android:layout_height="40dp" />

</LinearLayout>

recy_cart_item

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

    <RelativeLayout
        android:padding="5dp"
        android:background="#FFFFFF"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <CheckBox
            android:layout_centerVertical="true"
            android:id="@+id/shop_checkbox"
            android:layout_width="50dp"
            android:layout_height="50dp" />

        <TextView
            android:layout_centerVertical="true"
            android:layout_marginLeft="35dp"
            android:text="良品鋪子"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="23sp"
            android:textStyle="bold"
            android:id="@+id/shop_name" />

        <TextView
            android:id="@+id/item_bianji"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:textSize="20sp"
            android:text="編輯"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#D4D4D4"/>
    <LinearLayout
        android:background="#F2F2F2"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <CheckBox
            android:id="@+id/item_checkbox"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <com.facebook.drawee.view.SimpleDraweeView
            fresco:failureImage="@mipmap/ic_launcher"
            fresco:placeholderImage="@mipmap/ic_launcher"
            android:id="@+id/item_face"
            android:src="@mipmap/ic_launcher"
            android:layout_width="140dp"
            android:layout_height="140dp" />

        <LinearLayout
            android:layout_marginLeft="10dp"
            android:orientation="vertical"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/item_name"
                android:textSize="20sp"
                android:text="三隻松鼠"
                android:layout_width="wrap_content"
                android:layout_weight="1"
                android:layout_height="0dp" />

            <TextView
                android:textColor="#f00"
                android:id="@+id/item_price"
                android:textSize="23sp"
                android:text="299"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1" />

            <com.bwie.test.utils.CustomJiaJian
                android:visibility="gone"
                android:id="@+id/custom_jiajian"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1" />

            <TextView
                android:textSize="20sp"
                android:visibility="gone"
                android:id="@+id/item_yansechima"
                android:text="顏色 : 黑色 ; 尺碼: 29"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
        </LinearLayout>

        <!-- <ImageView
             android:visibility="gone"
             android:id="@+id/item_delete"
             android:layout_marginRight="10dp"
             android:src="@drawable/shopcart_delete"
             android:layout_width="30dp"
             android:layout_height="30dp" />-->

        <TextView
            android:visibility="gone"
            android:id="@+id/item_delete"
            android:padding="20dp"
            android:background="#FC7903"
            android:textColor="#fff"
            android:textSize="23sp"
            android:gravity="center"
            android:text="刪除"
            android:layout_width="wrap_content"
            android:layout_height="match_parent" />
    </LinearLayout>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#D4D4D4"/>

</LinearLayout>

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.CheckBox;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.bwie.test.adapter.RecyAdapter;
import com.bwie.test.bean.CartBean;
import com.bwie.test.myshoppingcart.inter_view.MyViewCallBack;
import com.bwie.test.presenter.MyPresenterCart;

public class MainActivity extends AppCompatActivity implements MyViewCallBack{
    private RecyclerView recyclerView;
    private TextView total_price;
    private TextView total_num;
    private CheckBox quanxuan;
    private MyPresenterCart myPresenterCart;
    private RecyAdapter recyAdapter;
    private TextView bianji;
    private LinearLayout linear_shanchu;
    private TextView quzhifu;
    private TextView shanchu;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //隱藏原有標題
        getSupportActionBar().hide();
        //查找控件
        recyclerView = (RecyclerView) findViewById(R.id.recycler_View);
        total_price = (TextView) findViewById(R.id.total_price);
        total_num = (TextView) findViewById(R.id.total_num);
        quanxuan = (CheckBox) findViewById(R.id.quanxuan);
        bianji = findViewById(R.id.bianji);
        linear_shanchu = findViewById(R.id.linear_shanchu);
        quzhifu = findViewById(R.id.quzhifu);
        shanchu = findViewById(R.id.shanchu);

        bianji.setTag(1);//編輯設置tag
        quanxuan.setTag(1);//1爲不選中
        LinearLayoutManager manager = new LinearLayoutManager(MainActivity.this,LinearLayoutManager
                                              .VERTICAL,false);

        myPresenterCart = new MyPresenterCart(this);
        recyAdapter = new RecyAdapter(this);
        //進入頁面查詢購物車的數據
        myPresenterCart.select();

        recyclerView.setLayoutManager(manager);
        recyclerView.setAdapter(recyAdapter);

        //調用recyAdapter裏面的接口,設置 全選按鈕 總價 總數量
        recyAdapter.setUpdateListener(new RecyAdapter.UpdateListener() {
            @Override
            public void setTotal(String total, String num, boolean allCheck) {
                //設置ui的改變
                total_num.setText("共"+num+"件商品");//總數量
                total_price.setText("總價 :¥"+total+"元");//總價
                if(allCheck){
                    quanxuan.setTag(2);
                    quanxuan.setBackgroundResource(R.drawable.shopcart_selected);
                }else{
                    quanxuan.setTag(1);
                    quanxuan.setBackgroundResource(R.drawable.shopcart_unselected);
                }
                quanxuan.setChecked(allCheck);
            }
        });

        //這裏只做ui更改, 點擊全選按鈕,,調到adapter裏面操作
        quanxuan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //調用adapter裏面的方法 ,,把當前quanxuan狀態傳遞過去
                int tag = (int) quanxuan.getTag();
                if(tag==1){
                    quanxuan.setTag(2);
                    quanxuan.setBackgroundResource(R.drawable.shopcart_selected);
                }else{
                    quanxuan.setTag(1);
                    quanxuan.setBackgroundResource(R.drawable.shopcart_unselected);
                }
                recyAdapter.quanXuan(quanxuan.isChecked());
            }
        });

        //點擊批量刪除的按鈕
        shanchu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                recyAdapter.shanChu();
            }
        });

        //點擊編輯按鈕,
        bianji.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int tag = (int) bianji.getTag();
                if(tag==1){
                    bianji.setText("完成");
                    bianji.setTag(2);
                    quzhifu.setVisibility(View.GONE);
                    linear_shanchu.setVisibility(View.VISIBLE);
                }else{
                    bianji.setText("編輯");
                    bianji.setTag(1);
                    quzhifu.setVisibility(View.VISIBLE);
                    linear_shanchu.setVisibility(View.GONE);
                }
            }
        });
    }

    @Override
    public void success(CartBean cartBean) {
        if(cartBean!=null) {
            //System.out.println(cartBean.getData().get(0).getList().get(0).getTitle());
            //將返回的數據 添加到適配器裏
            recyAdapter.add(cartBean);
        }
    }

    @Override
    public void failure() {
        System.out.println("網不好");
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(MainActivity.this, "網有點慢", Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        //調用p層數據
        myPresenterCart.detach();
    }
}

inter_view文件夾下MyViewCallBack

import com.bwie.test.bean.CartBean;

public interface MyViewCallBack {
    public void success(CartBean cartBean);
    public void failure();
}

MyViewCallBack2

import com.bwie.test.bean.DeleteBean;

public interface MyViewCallBack2 {
    public void success(DeleteBean deleteBean);
    public void failure();
}

model文件夾下MyModelCart

import com.bwie.test.bean.CartBean;
import com.bwie.test.model.inter_model.MyModelCallBack;
import com.bwie.test.utils.APIFactory;
import com.bwie.test.utils.AbstractObserver;

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

public class MyModelCart {
    public void select(final MyModelCallBack myModelCallBack) {
        final Map<String,String> map = new HashMap<>();
        map.put("source","android");
        map.put("uid","71");

        //調用apifactory裏面的方法
        APIFactory.getInstance().select("product/getCarts", map, new AbstractObserver<CartBean>() {
            @Override
            public void onSuccess(CartBean cartBean) {
                myModelCallBack.success(cartBean);
            }

            @Override
            public void onFailure() {
                myModelCallBack.failure();
            }
        });
    }
}

MyModelDelete

import com.bwie.test.bean.DeleteBean;
import com.bwie.test.model.inter_model.MyModelCallBack2;
import com.bwie.test.utils.APIFactory;
import com.bwie.test.utils.AbstractObserver;

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

public class MyModelDelete {
    public void delete(String pid,final MyModelCallBack2 myModelCallBack2) {
        final Map<String,String> map = new HashMap<>();
        map.put("source","android");
        map.put("pid",pid);
        map.put("uid","71");

        //調用apifactory裏面的方法
        APIFactory.getInstance().delete("/product/deleteCart", map, new AbstractObserver<DeleteBean>() {
            @Override
            public void onSuccess(DeleteBean deleteBean) {
                myModelCallBack2.success(deleteBean);
            }

            @Override
            public void onFailure() {
                myModelCallBack2.failure();
            }
        });
    }
}

inter_model文件夾下MyModelCallBack

import com.bwie.test.bean.CartBean;

public interface MyModelCallBack {
    public void success(CartBean cartBean);
    public void failure();
}

MyModelCallBack2

import com.bwie.test.bean.DeleteBean;

public interface MyModelCallBack2 {
    public void success(DeleteBean deleteBean);
    public void failure();
}

presenter文件夾下MyPresenterCart

import com.bwie.test.bean.CartBean;
import com.bwie.test.model.MyModelCart;
import com.bwie.test.model.inter_model.MyModelCallBack;
import com.bwie.test.myshoppingcart.inter_view.MyViewCallBack;

public class MyPresenterCart {
    MyModelCart myModelCart;
    MyViewCallBack myViewCallBack;

    public MyPresenterCart(MyViewCallBack myViewCallBack) {
        this.myViewCallBack = myViewCallBack;
        this.myModelCart = new MyModelCart();
    }

    public void select() {
        myModelCart.select(new MyModelCallBack() {
            @Override
            public void success(CartBean cartBean) {
                myViewCallBack.success(cartBean);
            }

            @Override
            public void failure() {
                myViewCallBack.failure();
            }
        });
    }

    public void detach() {
        this.myViewCallBack = null;
    }
}

MyPresenterDelete

import com.bwie.test.bean.DeleteBean;
import com.bwie.test.model.MyModelDelete;
import com.bwie.test.model.inter_model.MyModelCallBack2;
import com.bwie.test.myshoppingcart.inter_view.MyViewCallBack2;

public class MyPresenterDelete {
    MyModelDelete myModelDelete;
    MyViewCallBack2 myViewCallBack2;

    public MyPresenterDelete(MyViewCallBack2 myViewCallBack2) {
        this.myViewCallBack2 = myViewCallBack2;
        this.myModelDelete = new MyModelDelete();
    }

    public void delete(String pid) {
        myModelDelete.delete(pid,new MyModelCallBack2() {
            @Override
            public void success(DeleteBean deleteBean) {
                myViewCallBack2.success(deleteBean);
            }

            @Override
            public void failure() {
                myViewCallBack2.failure();
            }
        });
    }

    public void detach() {
        this.myViewCallBack2 = null;
    }
}

adapter文件夾下RecyAdapter

import android.content.Context;
import android.content.DialogInterface;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.bwie.test.bean.CartBean;
import com.bwie.test.bean.DeleteBean;
import com.bwie.test.myshoppingcart.R;
import com.bwie.test.myshoppingcart.inter_view.MyViewCallBack;
import com.bwie.test.myshoppingcart.inter_view.MyViewCallBack2;
import com.bwie.test.presenter.MyPresenterCart;
import com.bwie.test.presenter.MyPresenterDelete;
import com.bwie.test.utils.CustomJiaJian;
import com.facebook.drawee.backends.pipeline.Fresco;

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

public class RecyAdapter extends RecyclerView.Adapter<RecyAdapter.MyViewHolder> implements 
                       MyViewCallBack2, MyViewCallBack{
    MyPresenterCart myPresenterCart;
    //創建大的集合
    private List<CartBean.DataBean.ListBean> list;
    //存放商家的id和商家的名稱的map集合
    private Map<String,String> map = new HashMap<>();

    MyPresenterDelete myPresenterDelete ;
    Context context;
    public RecyAdapter(Context context) {
        this.context = context;
        myPresenterCart = new MyPresenterCart(this);
        myPresenterDelete = new MyPresenterDelete(this);
        //初始化fresco
        Fresco.initialize(context);
    }

    public void add(CartBean cartBean) {
        if(list==null){
            list = new ArrayList<>();
        }

        if(cartBean!=null) {
            for (CartBean.DataBean shop : cartBean.getData()) {
                map.put(shop.getSellerid(), shop.getSellerName());
                //第二層遍歷裏面的商品
                for (int i = 0; i < shop.getList().size(); i++) {
                    //添加到list集合裏
                    list.add(shop.getList().get(i));
                }
            }
            //調用方法 設置顯示或隱藏 商鋪名
            setFirst(list);
        }notifyDataSetChanged();
    }

    /**
     * 設置數據源,控制是否顯示商家
     * */
    private void setFirst(List<CartBean.DataBean.ListBean> list) {
        if(list.size()>0){
            list.get(0).setIsFirst(1);
            //從第二條開始遍歷
            for (int i=1;i<list.size();i++){
                //如果和前一個商品是同一家商店的
                if (list.get(i).getSellerid() == list.get(i-1).getSellerid()){
                    //設置成2不顯示商鋪
                    list.get(i).setIsFirst(2);
                }else{//設置成1顯示商鋪
                    list.get(i).setIsFirst(1);
                    //如果當前條目選中,把當前的商鋪也選中
                    if (list.get(i).isItem_check()==true){
                        list.get(i).setShop_check(list.get(i).isItem_check());
                    }
                }
            }
        }
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = View.inflate(context, R.layout.recy_cart_item,null);
        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        /**
         * 設置商鋪的 shop_checkbox和商鋪的名字 顯示或隱藏
         * */
        if(list.get(position).getIsFirst()==1){
            //顯示商家
            holder.shop_checkbox.setVisibility(View.VISIBLE);
            holder.shop_name.setVisibility(View.VISIBLE);
            //設置shop_checkbox的選中狀態
            holder.shop_checkbox.setChecked(list.get(position).isShop_check());
            holder.shop_name.setText(map.get(String.valueOf(list.get(position).getSellerid()))+" ＞");
        }else{//2
            //隱藏商家
            holder.shop_name.setVisibility(View.GONE);
            holder.shop_checkbox.setVisibility(View.GONE);
        }

        //拆分images字段
        String[] split = list.get(position).getImages().split("\\|");
        //設置商品的圖片
        holder.item_face.setImageURI(Uri.parse(split[0]));
        // ImageLoader.getInstance().displayImage(split[0],holder.item_face);
        //控制商品的item_checkbox,,根據字段改變
        holder.item_checkbox.setChecked(list.get(position).isItem_check());
        holder.item_name.setText(list.get(position).getTitle());
        holder.item_price.setText(list.get(position).getPrice()+"");
        //調用customjiajian裏面的方法設置 加減號中間的數字
        holder.customJiaJian.setEditText(list.get(position).getNum());

        holder.item_bianji.setTag(1);
        //點擊item編輯才顯示 自定義加減框
        holder.item_bianji.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int tag= (int) holder.item_bianji.getTag();
                if(tag==1) {
                    //加減號顯示
                    holder.item_bianji.setText("完成");
                    holder.customJiaJian.setVisibility(View.VISIBLE);
                    //商品的名稱隱藏
                    holder.item_name.setVisibility(View.GONE);
                    holder.item_yansechima.setVisibility(View.VISIBLE);
                    holder.item_price.setVisibility(View.GONE);
                    holder.item_delete.setVisibility(View.VISIBLE);
                    holder.item_bianji.setTag(2);
                }else{
                    //相反的 隱藏的顯示,顯示的隱藏
                    //加減號顯示
                    holder.item_bianji.setText("編輯");
                    holder.customJiaJian.setVisibility(View.GONE);
                    //商品的名稱隱藏
                    holder.item_name.setVisibility(View.VISIBLE);
                    holder.item_yansechima.setVisibility(View.GONE);
                    holder.item_price.setVisibility(View.VISIBLE);
                    holder.item_delete.setVisibility(View.GONE);
                    holder.item_bianji.setTag(1);
                }
            }
        });
        //設置點擊多選框
        holder.shop_checkbox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //先改變數據源中的shop_check
                list.get(position).setShop_check(holder.shop_checkbox.isChecked());

                for (int i=0;i<list.size();i++){
                    //如果是同一家商鋪的 都給成相同狀態
                    if(list.get(position).getSellerid()==list.get(i).getSellerid()){
                        //當前條目的選中狀態 設置成 當前商鋪的選中狀態
                        list.get(i).setItem_check(holder.shop_checkbox.isChecked());
                    }
                }
                //刷新適配器
                notifyDataSetChanged();
                //調用求和的方法
                sum(list);
            }
        });

        //商品的item_checkbox點擊事件,控制商鋪的shop_checkbox
        holder.item_checkbox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //先改變數據源中的item_checkbox
                list.get(position).setItem_check(holder.item_checkbox.isChecked());
                //反向控制商鋪的shop_checkbox
                for (int i=0;i<list.size();i++){
                    for (int j=0;j<list.size();j++){
                        //如果兩個商品是同一家店鋪的 並且 這兩個商品的item_checkbox選中狀態不一樣
                        if(list.get(i).getSellerid()==list.get(j).getSellerid() && !list.get(j)
                                                 .isItem_check()){
                            //就把商鋪的shop_checkbox改成false
                            list.get(i).setShop_check(false);
                            break;
                        }else{
                            //同一家商鋪的商品 選中狀態都一樣,就把商鋪shop_checkbox狀態改成true
                            list.get(i).setShop_check(true);
                        }
                    }
                }
                //更新適配器
                notifyDataSetChanged();
                //調用求和的方法
                sum(list);
            }
        });

        //刪除條目的點擊事件
        holder.item_delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                list.remove(position);//移除集合中的當前數據
                //刪除完當前的條目 重新判斷商鋪的顯示隱藏
                setFirst(list);

                //調用重新求和
                sum(list);
                notifyDataSetChanged();
            }
        });

        //加減號的監聽,
        holder.customJiaJian.setCustomListener(new CustomJiaJian.CustomListener() {
            @Override
            public void jiajian(int count) {
                //改變數據源中的數量
                list.get(position).setNum(count);
                notifyDataSetChanged();
                sum(list);
            }

            @Override
            //輸入值 求總價
            public void shuRuZhi(int count) {
                list.get(position).setNum(count);
                notifyDataSetChanged();
                sum(list);
            }
        });
    }

    //批量刪除的按鈕
    public void shanChu() {
        //存儲刪除的id
        final List<Integer> delete_listid = new ArrayList<>();
        for (int i=0;i<list.size();i++){
            if(list.get(i).isItem_check()){
                //將要刪除的pid添加到這個集合裏
                delete_listid.add(list.get(i).getPid());
            }
        }
        if (delete_listid.size()==0){
            //如果沒有要刪除的,就吐司提示
            Toast.makeText(context, "請選中至少一個商品後再刪除", Toast.LENGTH_SHORT).show();
            return;
        }
        //彈框
        final AlertDialog.Builder dialog = new AlertDialog.Builder(context);
        dialog.setTitle("操作提示");
        dialog.setMessage("你確定要刪除這"+delete_listid.size()+"個商品?");
        dialog.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                //使用接口刪除
                String a  = "";
                for(int j=0;j<delete_listid.size();j++) {
                    Integer integer = delete_listid.get(j);
                    String pid = String.valueOf(integer);
                    myPresenterDelete.delete(pid);
                    // list.remove(j);
                }
                //  Toast.makeText(context, a,Toast.LENGTH_SHORT).show();
            }
        }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.cancel();
            }
        }).create().show();
    }

    //view層調用這個方法, 點擊quanxuan按鈕的操作
    public void quanXuan(boolean checked) {
        for (int i=0;i<list.size();i++){
            list.get(i).setShop_check(checked);
            list.get(i).setItem_check(checked);
        }
        notifyDataSetChanged();
        sum(list);
    }

    private void sum(List<CartBean.DataBean.ListBean> list) {
        int totalNum = 0;
        float totalMoney = 0.0f;
        boolean allCheck = true;
        for (int i=0;i<list.size();i++){
            if (list.get(i).isItem_check()){
                totalNum += list.get(i).getNum();
                totalMoney += list.get(i).getNum() * list.get(i).getPrice();
            }else{
                //如果有個未選中,就標記爲false
                allCheck = false;
            }
        }
        //接口回調出去 把總價 總數量 和allcheck 傳給view層
        updateListener.setTotal(totalMoney+"",totalNum+"",allCheck);
    }

    @Override
    public int getItemCount() {
        return list==null?0:list.size();
    }

    @Override
    public void success(DeleteBean deleteBean) {
        //調用第一個presenter的方法 重新查詢數據
        myPresenterCart.select();
    }

    @Override
    public void success(CartBean cartBean) {
        list.clear();
        add(cartBean);
    }

    @Override
    public void failure() {
        System.out.println("網不好");
        Toast.makeText(context, "adapter網有點慢", Toast.LENGTH_SHORT).show();
    }

    public static class MyViewHolder extends RecyclerView.ViewHolder{
        private final CheckBox shop_checkbox;
        private final TextView shop_name;
        private final CheckBox item_checkbox;
        private final TextView item_name;
        private final TextView item_price;
        private final CustomJiaJian customJiaJian;
        //private final ImageView item_delete;
        private final TextView item_delete;
        private final ImageView item_face;
        private final TextView item_bianji;
        private final TextView item_yansechima;

        public MyViewHolder(View itemView) {
            super(itemView);
            //拿到控件
            shop_checkbox = (CheckBox) itemView.findViewById(R.id.shop_checkbox);
            shop_name = (TextView) itemView.findViewById(R.id.shop_name);
            item_checkbox = (CheckBox) itemView.findViewById(R.id.item_checkbox);
            item_name = (TextView) itemView.findViewById(R.id.item_name);
            item_price = (TextView) itemView.findViewById(R.id.item_price);
            customJiaJian = (CustomJiaJian) itemView.findViewById(R.id.custom_jiajian);
            //item_delete = (ImageView) itemView.findViewById(R.id.item_delete);
            item_delete = (TextView) itemView.findViewById(R.id.item_delete);
            item_face = (ImageView) itemView.findViewById(R.id.item_face);
            item_bianji = itemView.findViewById(R.id.item_bianji);
            item_yansechima = itemView.findViewById(R.id.item_yansechima);
        }
    }

    UpdateListener updateListener;
    public void setUpdateListener(UpdateListener updateListener){
        this.updateListener = updateListener;
    }

    //接口
    public interface UpdateListener{
        public void setTotal(String total,String num,boolean allCheck);
    }
}

utils文件夾下CustomJiaJian

import android.content.Context;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.bwie.test.myshoppingcart.R;

public class CustomJiaJian extends LinearLayout{
    private Button reverse;
    private Button add;
    private EditText countEdit;
    private int mCount =1;

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

    public CustomJiaJian(final Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        View view = View.inflate(context, R.layout.custom_jiajian,this);
        //查找控件
        reverse = (Button) view.findViewById(R.id.reverse);
        add = (Button) view.findViewById(R.id.add);
        countEdit = (EditText) view.findViewById(R.id.count);

        reverse.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                String content = countEdit.getText().toString().trim();
                int count = Integer.valueOf(content);

                if(count>1){
                    mCount = count-1;
                    countEdit.setText(mCount+"");
                    //回調給adapter裏面
                    if(customListener!=null){
                        customListener.jiajian(mCount);
                    }
                }else{
                    Toast.makeText(context, "最小數量爲1", Toast.LENGTH_SHORT).show();
                }
            }
        });

        add.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                String content = countEdit.getText().toString().trim();
                int count = Integer.valueOf(content)+1;
                mCount = count;

                countEdit.setText(mCount+"");
                //接口回調給adapter
                if(customListener!=null){
                    customListener.jiajian(mCount);
                }
            }
        });
    }

    public CustomJiaJian(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    CustomListener customListener;
    public void setCustomListener(CustomListener customListener){
        this.customListener = customListener;
    }

    //加減的接口
    public interface CustomListener{
        public void jiajian(int count);
        public void shuRuZhi(int count);
    }

    public void setEditText(int num) {
        if(countEdit!=null){
            countEdit.setText(num+"");
        }
    }
}

AbstractObserver

import com.google.gson.Gson;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import io.reactivex.Observer;
import io.reactivex.disposables.Disposable;

public abstract class AbstractObserver<T> implements Observer<String>{
    //不需要下面重寫的四個方法,只需要自己寫的兩個抽象方法
    public abstract void onSuccess(T t);
    public abstract void onFailure();

    @Override
    public void onSubscribe(Disposable d) {
    }

    @Override
    public void onNext(String result) {
        //這裏的s是請求網絡傳回來的string字符串
        Type type = getClass().getGenericSuperclass();
        Type[] types = ((ParameterizedType) type).getActualTypeArguments();
        Class clazz = (Class) types[0];//強轉成類對象
        //使用gson解析
        Gson gson = new Gson();
        T t = (T) gson.fromJson(result,clazz);
        //調用抽象方法onSuccess
        onSuccess(t);
    }

    @Override
    public void onError(Throwable e) {
        try {
            onFailure();
        }catch (Exception e1){
            e.printStackTrace();
        }
    }

    @Override
    public void onComplete() {

    }
}

APIFactory

import java.util.Map;
import io.reactivex.Observer;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;

public class APIFactory {
    private static APIFactory factory = null;

    public static APIFactory getInstance(){
        if(factory==null){
            synchronized (APIFactory.class){
                if(factory==null){
                    factory = new APIFactory();
                }
            }
        }
        return factory;
    }

    //查詢購物車的方法
    public void select(String url, Map<String,String> map, Observer<String> observer){
        //調用retrofit工具類
        RetrofitUtils.getInstance().select(url,map)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(observer);
    }

    //刪除購物車的方法
    public void delete(String url, Map<String,String> map, Observer<String> observer){
        //調用retrofit工具類
        RetrofitUtils.getInstance().select(url,map)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(observer);
    }
}

IGetService

import java.util.Map;
import io.reactivex.Observable;
import retrofit2.http.GET;
import retrofit2.http.QueryMap;
import retrofit2.http.Url;

public interface IGetService {
    //查詢購物車,
    @GET
    Observable<String> select(@Url String url, @QueryMap Map<String,String> map);

    //刪除購物車
    @GET
    Observable<String> delete(@Url String url, @QueryMap Map<String,String> map);

    //更新購物車
    @GET
    Observable<String> update(@Url String url,@QueryMap Map<String,String> map);
}

OkHttpUtils

import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;

public class OkHttpUtils {
    private static OkHttpClient client = null;

    public static OkHttpClient getInstance(){
        if(client==null){
            synchronized (OkHttpUtils.class){
                if(client==null){
                    client = new OkHttpClient.Builder()
                            .connectTimeout(2000, TimeUnit.SECONDS)
                            .writeTimeout(2000,TimeUnit.SECONDS)
                            .readTimeout(2000, TimeUnit.SECONDS)
                            .build();
                }
            }
        }
        return client;
    }
}

RetrofitUtils

import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.scalars.ScalarsConverterFactory;

public class RetrofitUtils {
    private static IGetService service = null;
    //單例模式
    public static IGetService getInstance(){
        if(service==null){
            synchronized (RetrofitUtils.class){
                if(service==null){
                    Retrofit retrofit = new Retrofit.Builder()
                            .baseUrl("https://www.zhaoapi.cn")
                            .addConverterFactory(ScalarsConverterFactory.create())
                            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                            .client(OkHttpUtils.getInstance())
                            .build();

                    service = retrofit.create(IGetService.class);
                }
            }
        }
        return service;
    }
}

bean文件夾下CartBean

import java.util.List;

public class CartBean {
 
    private String code;
    private String msg;
    private List<DataBean> data;

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public List<DataBean> getData() {
        return data;
    }

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    public static class DataBean {

        private boolean groupChecked;

        public boolean isGroupChecked() {
            return groupChecked;
        }

        public void setGroupChecked(boolean groupChecked) {
            this.groupChecked = groupChecked;
        }

        private String sellerName;
        private String sellerid;
        private List<ListBean> list;

        public String getSellerName() {
            return sellerName;
        }

        public void setSellerName(String sellerName) {
            this.sellerName = sellerName;
        }

        public String getSellerid() {
            return sellerid;
        }

        public void setSellerid(String sellerid) {
            this.sellerid = sellerid;
        }

        public List<ListBean> getList() {
            return list;
        }

        public void setList(List<ListBean> list) {
            this.list = list;
        }

        public static class ListBean {

            private double bargainPrice;
            private String createtime;
            private String detailUrl;
            private String images;
            private int num;
            private int pid;
            private double price;
            private int pscid;
            private int selected;//當前的商品子條目是否選中....1表示選中,0未選中
            private int sellerid;
            private String subhead;
            private String title;
            //自己添加的三個字段
            private int isFirst = 1;//1爲顯示商鋪
            private boolean item_check;//每個商品的選中狀態
            private boolean shop_check;//商店的選中狀態

            public int getIsFirst() {
                return isFirst;
            }

            public void setIsFirst(int isFirst) {
                this.isFirst = isFirst;
            }

            public boolean isItem_check() {
                return item_check;
            }

            public void setItem_check(boolean item_check) {
                this.item_check = item_check;
            }

            public boolean isShop_check() {
                return shop_check;
            }

            public void setShop_check(boolean shop_check) {
                this.shop_check = shop_check;
            }

            public double getBargainPrice() {
                return bargainPrice;
            }

            public void setBargainPrice(double bargainPrice) {
                this.bargainPrice = bargainPrice;
            }

            public String getCreatetime() {
                return createtime;
            }

            public void setCreatetime(String createtime) {
                this.createtime = createtime;
            }

            public String getDetailUrl() {
                return detailUrl;
            }

            public void setDetailUrl(String detailUrl) {
                this.detailUrl = detailUrl;
            }

            public String getImages() {
                return images;
            }

            public void setImages(String images) {
                this.images = images;
            }

            public int getNum() {
                return num;
            }

            public void setNum(int num) {
                this.num = num;
            }

            public int getPid() {
                return pid;
            }

            public void setPid(int pid) {
                this.pid = pid;
            }

            public double getPrice() {
                return price;
            }

            public void setPrice(double price) {
                this.price = price;
            }

            public int getPscid() {
                return pscid;
            }

            public void setPscid(int pscid) {
                this.pscid = pscid;
            }

            public int getSelected() {
                return selected;
            }

            public void setSelected(int selected) {
                this.selected = selected;
            }

            public int getSellerid() {
                return sellerid;
            }

            public void setSellerid(int sellerid) {
                this.sellerid = sellerid;
            }

            public String getSubhead() {
                return subhead;
            }

            public void setSubhead(String subhead) {
                this.subhead = subhead;
            }

            public String getTitle() {
                return title;
            }

            public void setTitle(String title) {
                this.title = title;
            }


        }
    }
}

DeleteBean

public class DeleteBean {

    private String msg;
    private String code;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
}
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首先我們先寫一個攔截器 package com.bwey.text.util; import android.os.Build; import android.util.Log; import com.google.gson.Gso

小神奇 2020-06-09 18:57:16

MVP和Retrofit+Rxjava+OkHttp封裝結合請求數據

效果圖我就不展示了，主要就是把Retrofit+Rxjava+OkHttp封裝在了一起，廢話不多說，甩代碼 請求接口，我使用的是GET public interface Inters { /** * http://ap

小神奇 2020-06-09 18:57:16

仿京東分類實現

   首先我這一塊我用的是MVP模式寫的這個分類，簡單說一下它的佈局，就兩塊，左面一塊就是RecyclerView，右面一塊是二級列表嵌套RecyclerView，請求的時候 我用的Retrofit+Rxjava+OkHttp的結合請求的

小神奇 2020-06-09 18:57:16

MVP泛型請求數據

實現我們先寫public class BasePresenter<V> { // V 相當於V的接口 public V view; /** * Presenter 持有View 的接口 *

小神奇 2020-06-09 18:57:16

商品搜索的實現

商品的搜索根據所給我們接口來實現 https://www.zhaoapi.cn/product/searchProducts?keywords="+key+"&page=1 查詢的Bean包 public class SouBean {

小神奇 2020-06-09 18:57:16

OkHttp3網絡請求（一）

Injor Chan 2020-05-27 11:14:16

MVP-簡單的OkHttp網絡請求數據

小神奇 2020-02-24 03:55:18

Fresco-的簡單實用

小神奇 2020-02-24 03:55:18

Viewpager的自動輪播加+GridView網上獲取數據+小圓點

小神奇 2020-02-24 03:55:18