購物車

1.Addsum
public class Addsum extends LinearLayout {

private View view;
private TextView shop_recycler_jian;
private TextView shop_recycler_number;
private TextView shop_recycler_add;

public Addsum(Context context) {
    super(context, null);
}

public Addsum(Context context, AttributeSet attrs) {
    this(context, attrs, -1);
}

public Addsum(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    initView(context);
    initListener();
}

private void initListener() {
    shop_recycler_add.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            add();
        }
    });
    shop_recycler_jian.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            jian();
        }
    });
}

private void jian() {
    String s = shop_recycler_number.getText().toString();
    int parseInt = Integer.parseInt(s);
    if (parseInt>0){
        parseInt--;
        setcurnum(parseInt);
    }
}


private void add() {
    String s = shop_recycler_number.getText().toString();
    int parseInt = Integer.parseInt(s);
    parseInt++;
    setcurnum(parseInt);
}
private void initView(Context context) {
    view = View.inflate(context, R.layout.add_sum, this);
    shop_recycler_jian = view.findViewById(R.id.shop_recycler_jian);
    shop_recycler_add = view.findViewById(R.id.shop_recycler_add);
    shop_recycler_number = view.findViewById(R.id.shop_recycler_number);
    shop_recycler_number.setText("0");
}

public void setcurnum(int parseInt) {
    shop_recycler_number.setText(parseInt+"");
    if (onNumCHangeLitener!=null){
        onNumCHangeLitener.OnitemCLick(this,parseInt);
    }
}

public interface OnNumCHangeLitener{
    void OnitemCLick(View view,int sum);
}
OnNumCHangeLitener onNumCHangeLitener;

public void setOnNumCHangeLitener(OnNumCHangeLitener onNumCHangeLitener) {
    this.onNumCHangeLitener = onNumCHangeLitener;
}

}

2.add_sum.xml

<?xml version="1.0" encoding="utf-8"?>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/shop_recycler_jian"
    android:text="--"
    android:padding="10dp"
    android:textColor="#666666"
    android:textSize="14sp"/>
<TextView
    android:layout_width="80dp"
    android:layout_height="wrap_content"
    android:id="@+id/shop_recycler_number"
    android:gravity="center"
    android:text="1231"
    android:padding="10dp"
    android:textColor="#666666"
    android:textSize="14sp"/>
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/shop_recycler_add"
    android:text="+"
    android:padding="10dp"
    android:textColor="#666666"
    android:textSize="14sp"/>

3.佈局

<CheckBox
    android:id="@+id/checkboxz"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="13dp"
    android:layout_marginLeft="13dp"
    android:layout_marginTop="1dp"
    android:focusable="false"
    android:theme="@style/My_CheckBox" />

<ImageView
    android:id="@+id/imagez"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="0dp"
    android:src="@mipmap/ic_launcher" />

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:id="@+id/textz1"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:maxLines="2"
        android:text="sdfas"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/textz2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_margin="10dp"
        android:text="sdfa" />

    <bw.com.king.shopcar.Addsum
        android:id="@+id/addsum"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:layout_margin="10dp">

    </bw.com.king.shopcar.Addsum>
</RelativeLayout>

4.Adapter

public class ShopCarAdapter extends RecyclerView.Adapter {
private Context context;
private ShopCarBean shopCarBean;
private Addsum.OnNumCHangeLitener onNumCHangeLitener;
public ShopCarAdapter(Context context, ShopCarBean shopCarBean) {
this.context = context;
this.shopCarBean = shopCarBean;
}

@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(context).inflate(R.layout.shopcar_item, viewGroup, false);
    Holder holder = new Holder(view);
    return holder;
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, final int i) {
    final Holder holder = (Holder) viewHolder;
    Glide.with(context).load(shopCarBean.getResult().get(i).getPic()).into(holder.imageView);
    holder.textView.setText(shopCarBean.getResult().get(i).getCommodityName());
    holder.textView1.setText("￥"+shopCarBean.getResult().get(i).getPrice()+"");
    holder.addsum.setcurnum(shopCarBean.getResult().get(i).getCount());
    holder.addsum.setOnNumCHangeLitener(new Addsum.OnNumCHangeLitener() {
        @Override
        public void OnitemCLick(View view, int sum) {
            shopCarBean.getResult().get(i).setCount(sum);
            if (onNumCHangeLitener!=null){
                onNumCHangeLitener.OnitemCLick(view,sum);
            }
        }
    });
    //全選
    if (shopCarBean.getResult().get(i).getCheckbox()==1){
        holder.checkBox1.setChecked(true);
    }else {
        holder.checkBox1.setChecked(false);
    }
    //單選
    holder.checkBox1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (shopCarBean.getResult().get(i).getCheckbox()==1){
                onItemclick.onclick(i,0);
            }else {
                onItemclick.onclick(i,1);
            }
        }
    });
}

public void setOnNumCHangeLitener(Addsum.OnNumCHangeLitener onNumCHangeLitener) {
    this.onNumCHangeLitener = onNumCHangeLitener;
}

@Override
public int getItemCount() {
    return shopCarBean.getResult().size();
}
public class Holder extends RecyclerView.ViewHolder {

    private final CheckBox checkBox1;
    private final ImageView imageView;
    private final TextView textView;
    private final TextView textView1;
    private final Addsum addsum;

    public Holder(@NonNull View itemView) {
        super(itemView);
        checkBox1 = itemView.findViewById(R.id.checkboxz);
        imageView = itemView.findViewById(R.id.imagez);
        textView = itemView.findViewById(R.id.textz1);
        textView1 = itemView.findViewById(R.id.textz2);
       addsum = itemView.findViewById(R.id.addsum);
    }
}

public interface onItemclick{
void onclick(int i,int b);
}
onItemclick onItemclick;

public void setOnItemclick(ShopCarAdapter.onItemclick onItemclick) {
    this.onItemclick = onItemclick;
}

}

5.Fragment
public class ThreeFragment extends Fragment implements ShopCarView {

private ShopCarPresenter shopCarPresenter = new ShopCarPresenter(this);
private RecyclerView shopcar_rec;
private CheckBox qx;
private TextView tvSum;
private Button jiesuan;
private ShopCarAdapter shopCarAdapter;
private Boolean checked;
private List<ShopCarBean.ResultBean> shopCarBeanResult;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_three, container, false);
    shopCarPresenter.showShopCar();
    initView(view);
    return view;
}
private void initView(View view) {
    shopcar_rec = (RecyclerView) view.findViewById(R.id.shopcar_rec);
    qx = (CheckBox) view.findViewById(R.id.qx);
    tvSum = (TextView) view.findViewById(R.id.tvSum);
    jiesuan = (Button) view.findViewById(R.id.jiesuan);
}
@Override
public void onSuccessShopCar(final ShopCarBean shopCarBean) {
    shopCarBeanResult = shopCarBean.getResult();
    //全選、反選
    qx.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked){
                for (int i = 0; i <shopCarBean.getResult().size() ; i++) {
                    shopCarBean.getResult().get(i).setCheckbox(1);
                }
            }else {
                for (int i = 0; i <shopCarBean.getResult().size() ; i++) {
                    shopCarBean.getResult().get(i).setCheckbox(0);
                }
            }
            getTotal();
            shopCarAdapter.notifyDataSetChanged();
        }
    });
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);
    shopcar_rec.setLayoutManager(linearLayoutManager);
    shopCarAdapter = new ShopCarAdapter(getActivity(),shopCarBean);
    shopcar_rec.setAdapter(shopCarAdapter);
    shopCarAdapter.setOnItemclick(new ShopCarAdapter.onItemclick() {
        @Override
        public void onclick(int i, int b) {
            shopCarBean.getResult().get(i).setCheckbox(b);
            getTotal();
        }
    });
    shopCarAdapter.setOnNumCHangeLitener(new Addsum.OnNumCHangeLitener() {
        @Override
        public void OnitemCLick(View view, int sum) {
            getTotal();
        }
    });
}
private void getTotal(){
    int sum=0;
    for (int i = 0; i <shopCarBeanResult.size() ; i++) {
        if (shopCarBeanResult.get(i).getCheckbox()==1){
            int price = shopCarBeanResult.get(i).getPrice();
            int count = shopCarBeanResult.get(i).getCount();
            sum+=price*count;
        }
    }
    tvSum.setText("合計:"+sum+"");
}

@Override
public void onFailerShopCar(String error) {

}

}

6.Bean
public class ShopCarBean {

/**
 * result : [{"commodityId":5,"commodityName":"雙頭兩用修容筆","count":3,"pic":"http://172.17.8.100/images/small/commodity/mzhf/cz/3/1.jpg","price":39},{"commodityId":6,"commodityName":"輕柔系自然裸妝假睫毛","count":4,"pic":"http://172.17.8.100/images/small/commodity/mzhf/cz/4/1.jpg","price":39}]
 * message : 查詢成功
 * status : 0000
 */
private String message;
private String status;
private List<ResultBean> result;

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String getStatus() {
    return status;
}

public void setStatus(String status) {
    this.status = status;
}

public List<ResultBean> getResult() {
    return result;
}

public void setResult(List<ResultBean> result) {
    this.result = result;
}

public static class ResultBean {
    /**
     * commodityId : 5
     * commodityName : 雙頭兩用修容筆
     * count : 3
     * pic : http://172.17.8.100/images/small/commodity/mzhf/cz/3/1.jpg
     * price : 39
     */

    private int commodityId;
    private String commodityName;
    private int count;
    private String pic;
    private int price;
    private int checkbox ;

    public ResultBean(int checkbox) {
        this.checkbox = checkbox;
    }

    public int getCheckbox() {
        return checkbox;
    }

    public void setCheckbox(int checkbox) {
        this.checkbox = checkbox;
    }

    public int getCommodityId() {
        return commodityId;
    }

    public void setCommodityId(int commodityId) {
        this.commodityId = commodityId;
    }

    public String getCommodityName() {
        return commodityName;
    }

    public void setCommodityName(String commodityName) {
        this.commodityName = commodityName;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public String getPic() {
        return pic;
    }

    public void setPic(String pic) {
        this.pic = pic;
    }

    public int getPrice() {
        return price;
    }

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

}