简单购物车模式

activity_main.xml

<LinearLayout
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="60dp">

        <TextView
            android:text="购物车"
            android:textSize="18sp"
            android:layout_centerInParent="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <TextView
            android:id="@+id/bianji"
            android:text="编辑"
            android:layout_marginRight="20dp"
            android:textSize="15sp"
            android:layout_alignParentEnd="true"
            android:layout_centerVertical="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <TextView
            android:layout_alignParentBottom="true"
            android:background="#000000"
            android:layout_width="match_parent"
            android:layout_height="1dp"/>

    </RelativeLayout>

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

    <TextView
        android:id="@+id/tv_heji"
        android:layout_margin="20dp"
        android:text="合计:0"
        android:textSize="15sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <RelativeLayout
        android:id="@+id/rl1"
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <TextView
            android:layout_alignParentTop="true"
            android:background="#000000"
            android:layout_width="match_parent"
            android:layout_height="1dp"/>
        <CheckBox
            android:layout_marginLeft="10dp"
            android:id="@+id/quanxuan"
            android:text="全选"
            android:layout_centerVertical="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <TextView
            android:id="@+id/tv_heji2"
            android:layout_marginLeft="20dp"
            android:text="合计:0"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/quanxuan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <Button
            android:id="@+id/btn_jiesuan"
            android:text="去结算"
            android:textColor="#ffffff"
            android:layout_marginRight="20dp"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:background="@color/colorAccent"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/rl2"
        android:visibility="gone"
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <TextView
            android:layout_alignParentTop="true"
            android:background="#000000"
            android:layout_width="match_parent"
            android:layout_height="1dp"/>
        <CheckBox
            android:layout_marginLeft="10dp"
            android:id="@+id/quanxuan2"
            android:text="全选"
            android:layout_centerVertical="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <Button
            android:id="@+id/btn_shoucang"
            android:text="收藏"
            android:layout_marginRight="20dp"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <Button
            android:id="@+id/btn_shanchu"
            android:text="删除"
            android:layout_marginRight="10dp"
            android:layout_toLeftOf="@id/btn_shoucang"
            android:layout_centerVertical="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </RelativeLayout>

</LinearLayout>

items.xml

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

    <CheckBox
        android:id="@+id/items_radioButton"
        android:layout_width="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_height="wrap_content"/>

    <ImageView
        android:id="@+id/items_img"
        android:background="@mipmap/ic_launcher"
        android:layout_margin="10dp"
        android:layout_width="120dp"
        android:layout_height="80dp"/>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:id="@+id/items_name"
            android:text="asdasdsadasd"
            android:textSize="18sp"
            android:layout_marginTop="15dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <com.bwie.shizhouming.test.NumberAddSubView
            android:id="@+id/zujian"
            android:layout_marginRight="20dp"
            android:layout_alignParentEnd="true"
            android:layout_below="@+id/items_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
        </com.bwie.shizhouming.test.NumberAddSubView>

        <TextView
            android:id="@+id/jiage"
            android:layout_marginTop="10dp"
            android:text="asdasdsadsa"
            android:layout_alignBottom="@id/zujian"
            android:layout_below="@+id/items_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </RelativeLayout>

</LinearLayout>

number_add_sub_view.xml

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

    <ImageView
        android:id="@+id/btn_sub"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@mipmap/goods_sub_btn"
        android:padding="5dp"
        android:textSize="20sp" />
    <TextView
        android:id="@+id/tv_num"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginRight="20dp"
        android:layout_marginLeft="20dp"
        android:text="1" />
    <ImageView
        android:id="@+id/btn_add"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:background="@mipmap/goods_add_btn"
        android:padding="5dp"
        android:textSize="20sp" />
</LinearLayout>

MainActivity

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView bianji;
    private TextView tv_heji;
    private CheckBox quanxuan;
    private TextView tv_heji2;
    private Button btn_jiesuan;
    private RelativeLayout rl1;
    private CheckBox quanxuan2;
    private Button btn_shanchu;
    private Button btn_shoucang;
    private RelativeLayout rl2;
    private NumberAddSubView nb_addsub_view;
    private RecyclerView mRecyclerView;
    private MyRecyclerAdapter mAdapter;
    private ArrayList<String> mNames;
    private ArrayList<String> mPrices;
    private ArrayList<Boolean> mList;
    private ArrayList<Integer> mCount = new ArrayList<>();
    private boolean mA = true;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //舒适化控件
        initView();
        //初适化数据
        initData();
    }

    private void initData() {
        //初适化商品数量的集合
        mCount = new ArrayList<>();
        mCount.add(1);
        mCount.add(1);
        mCount.add(1);
        mCount.add(1);
        mCount.add(1);

        //初适化商品是否被选中的集合
        mList = new ArrayList<>();
        mList.add(false);
        mList.add(false);
        mList.add(false);
        mList.add(false);
        mList.add(false);
        //初适化商品名称的集合
        mNames = new ArrayList<>();
        mNames.add("衣服");
        mNames.add("裤子");
        mNames.add("鞋子");
        mNames.add("袜子");
        mNames.add("外套");
        //初适化商品价格的集合
        mPrices = new ArrayList<>();
        mPrices.add("200");
        mPrices.add("150");
        mPrices.add("200");
        mPrices.add("20");
        mPrices.add("300");
        //创建适配器，适配数据
        mAdapter = new MyRecyclerAdapter();
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.setAdapter(mAdapter);

    }

    private void initView() {
        //找到控件
        bianji = (TextView) findViewById(R.id.bianji);
        tv_heji = (TextView) findViewById(R.id.tv_heji);
        quanxuan = (CheckBox) findViewById(R.id.quanxuan);
        tv_heji2 = (TextView) findViewById(R.id.tv_heji2);
        btn_jiesuan = (Button) findViewById(R.id.btn_jiesuan);
        rl1 = (RelativeLayout) findViewById(R.id.rl1);
        quanxuan2 = (CheckBox) findViewById(R.id.quanxuan2);
        btn_shanchu = (Button) findViewById(R.id.btn_shanchu);
        btn_shoucang = (Button) findViewById(R.id.btn_shoucang);
        rl2 = (RelativeLayout) findViewById(R.id.rl2);
        mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);

        //注册点击事件
        btn_jiesuan.setOnClickListener(this);
        btn_shanchu.setOnClickListener(this);
        btn_shoucang.setOnClickListener(this);
        quanxuan.setOnClickListener(this);
        quanxuan2.setOnClickListener(this);
        bianji.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            //实现结算功能
            case R.id.btn_jiesuan:
                int price = getPrice();
                Toast.makeText(this, price + "", Toast.LENGTH_SHORT).show();
                break;
            //实现删除功能
            case R.id.btn_shanchu:
                for (int i = 0; i < mList.size(); i++) {
                    if (mList.get(i)) {
                        mList.remove(i);
                        mNames.remove(i);
                        mPrices.remove(i);
                    }
                }
                mAdapter.notifyDataSetChanged();
                break;
            //实现收藏功能
            case R.id.btn_shoucang:
                Toast.makeText(this, "收藏成功", Toast.LENGTH_SHORT).show();
                break;
            //实现全选及反选功能
            case R.id.quanxuan:
                if (quanxuan.isChecked()) {
                    for (int i = 0; i < mList.size(); i++) {
                        mList.set(i, true);
                        getPrice();
                    }
                } else {
                    for (int i = 0; i < mList.size(); i++) {
                        mList.set(i, false);
                        getPrice();
                    }
                }
                mAdapter.notifyDataSetChanged();
                break;
            //实现全选及反选功能
            case R.id.quanxuan2:
                if (quanxuan2.isChecked()) {
                    for (int i = 0; i < mList.size(); i++) {
                        mList.set(i, true);
                    }
                } else {
                    for (int i = 0; i < mList.size(); i++) {
                        mList.set(i, false);
                    }
                }
                mAdapter.notifyDataSetChanged();
                break;
            //实现编辑功能
            case R.id.bianji:
                if (bianji.getText().equals("编辑")) {
                    bianji.setText("完成");
                    rl1.setVisibility(View.GONE);
                    rl2.setVisibility(View.VISIBLE);
                    tv_heji.setVisibility(View.GONE);
                    mA = false;
                } else {
                    bianji.setText("编辑");
                    rl2.setVisibility(View.GONE);
                    rl1.setVisibility(View.VISIBLE);
                    tv_heji.setVisibility(View.VISIBLE);
                    mA = true;
                    getPrice();
                }

                break;
        }
    }
    //计算商品价格的方法
    public int getPrice() {
        //判断是否处于编辑页面
        if (mA) {
            int sum = 0;
            for (int i = 0; i < mList.size(); i++) {
                if (mList.get(i)) {
                    sum += Integer.parseInt(mPrices.get(i)) * mCount.get(i);
                }
            }
            tv_heji.setText("合计:" + sum);
            tv_heji2.setText("合计:" + sum);
            return sum;
        }
        return 0;
    }
    /////////////////////////////////////////////////////////////////////////////////
    //创建内部适配器
    class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.MyViewHolder> {

        @Override
        public MyRecyclerAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            //绑定视图
            View view = LayoutInflater.from(MainActivity.this).inflate(R.layout.items, parent,
                    false);
            MyRecyclerAdapter.MyViewHolder holder = new MyRecyclerAdapter.MyViewHolder(view);
            return holder;
        }

        @Override
        public void onBindViewHolder(final MyRecyclerAdapter.MyViewHolder holder, final int
                position) {
            //绑定数据
            holder.mTextView.setText(mNames.get(position));
            holder.mTextView2.setText(mPrices.get(position));
            holder.mRadioButton.setChecked(mList.get(position));
            holder.mRadioButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (holder.mRadioButton.isChecked()) {
                        mList.set(position, true);
                        getPrice();
                    } else {
                        mList.set(position, false);
                        getPrice();
                    }
                }
            });

            holder.nb_addsub_view.setOnButtonClickListenter(new NumberAddSubView
                    .OnButtonClickListenter() {
                @Override
                public void onButtonAddClick(View view, int value) {
                    Toast.makeText(MainActivity.this, "AddClick Vaule == " + value, Toast
                            .LENGTH_SHORT).show();
                    mCount.set(position, value);
                    getPrice();
                }

                @Override
                public void onButtonSubClick(View view, int value) {
                    Toast.makeText(MainActivity.this, "SubClick Vaule == " + value, Toast
                            .LENGTH_SHORT).show();
                    mCount.set(position, value);
                    getPrice();
                }
            });

        }

        @Override
        public int getItemCount() {
            //返回RecyclerView的条目数
            return mNames.size();
        }
        //自定义ViewHolder
        public class MyViewHolder extends RecyclerView.ViewHolder {

            private CheckBox mRadioButton;
            private ImageView mImageView;
            private TextView mTextView, mTextView2;
            private NumberAddSubView nb_addsub_view;
            //查找控件
            public MyViewHolder(View itemView) {
                super(itemView);
                mRadioButton = (CheckBox) itemView.findViewById(R.id.items_radioButton);
                mTextView = (TextView) itemView.findViewById(R.id.items_name);
                mTextView2 = (TextView) itemView.findViewById(R.id.jiage);
                mImageView = (ImageView) itemView.findViewById(R.id.items_img);
                nb_addsub_view = (NumberAddSubView) itemView.findViewById(R.id.zujian);
            }
        }
    }


}

NumberAddSubView

import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * function: 自定义View实现数量加减器的功能
 */

public class NumberAddSubView extends LinearLayout implements View.OnClickListener {

    private ImageView btn_sub;
    private ImageView btn_add;
    private TextView tv_num;
    private Context mContext;
    /**
     * 设置默认值
     */
    private int value = 1;
    private int minValue = 1;
    private int maxValue = 5;

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

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

    public NumberAddSubView(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.mContext = context;
        initView(context);
    }

    private void initView(Context context) {
        View.inflate(context, R.layout.number_add_sub_view, this);
        btn_sub = (ImageView) findViewById(R.id.btn_sub);
        btn_add = (ImageView) findViewById(R.id.btn_add);
        tv_num = (TextView) findViewById(R.id.tv_num);
        btn_sub.setOnClickListener(this);
        btn_add.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        if (view.getId() == R.id.btn_sub) {
// Toast.makeText(mContext,"减",Toast.LENGTH_SHORT).show();
            subNum();
        } else if (view.getId() == R.id.btn_add) {
// Toast.makeText(mContext,"加",Toast.LENGTH_SHORT).show();
            addNum();
        }
        if (onButtonClickListenter != null) {
            onButtonClickListenter.onButtonAddClick(view, value);
        }
    }

    public int getValue() {
        String val = tv_num.getText().toString();
        if (!TextUtils.isEmpty(val)) {
            value = Integer.parseInt(val);
        }
        return value;
    }

    public void setValue(int value) {
        this.value = value;
        tv_num.setText(value + "");
    }

    public int getMinValue() {
        return minValue;
    }

    public void setMinValue(int minValue) {
        this.minValue = minValue;
    }

    public int getMaxValue() {
        return maxValue;
    }

    public void setMaxValue(int maxValue) {
        this.maxValue = maxValue;
    }

    /**
     * 减少数据
     */
    private void subNum() {
        if (value > minValue) {
            value = value - 1;
            tv_num.setText(value + "");
        }
    }

    /**
     * 添加数据
     */
    private void addNum() {
        if (value < maxValue) {
            value = value + 1;
            tv_num.setText(value + "");
        }
    }

    public interface OnButtonClickListenter {
        /**
         * 当增加按钮被点击的时候回调该方法
         * *
         *
         * @param view
         * @param value
         */
        public void onButtonAddClick(View view, int value);

        /**
         * 当减少按钮被点击的时候回调这个方法
         * *
         *
         * @param view
         * @param value
         */
        public void onButtonSubClick(View view, int value);
    }

    private OnButtonClickListenter onButtonClickListenter;

    public void setOnButtonClickListenter(OnButtonClickListenter onButtonClickListenter) {
        this.onButtonClickListenter = onButtonClickListenter;
    }

}