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时间:2019-10-16 19:44:32来源:IT技术作者:seo实验室小编阅读:62次「手机版」
 

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购物车 主布局

<com.jcodecraeer.xrecyclerview.XRecyclerView

Android:id="@+id/xrv_cart"

android:layout_width=“match_parent

android:layout_height=“0dp”

android:layout_weight=“9”

></com.jcodecraeer.xrecyclerview.XRecyclerView>

adapter适配器

public class CartAdapter extends XRecyclerView.Adapter<CartAdapter.ViewHolder> {

private context context;

private List<Cart.ResultBean> list;

private List checkBoxs;

public CartAdapter(Context context) {
    this.context = context;
    list = new ArrayList<>();
    checkBoxs = new ArrayList<>();
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = View.inflate(context, R.layout.cart_recy_item, null);
    ViewHolder holder = new ViewHolder(view);
    return holder;
}

@Override
public void onBindViewHolder(@NonNull final ViewHolder viewHolder, final int i) {
    Uri uri = Uri.parse(list.get(i).getPic());
    viewHolder.cartSdvPic.setImageURI(uri);
    viewHolder.cartTxtCommodityName.setText(list.get(i).getCommodityName());
    viewHolder.cartTxtPrice.setText(""+list.get(i).getPrice());
    viewHolder.cartAddCount.setNumber(list.get(i).getCount());
    /**
     * 点击商品时回调
     */
    viewHolder.cb.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mCartlistener !=null){
                boolean cbChecked = viewHolder.cb.isChecked();
                checkBoxs.get(i).setCk(cbChecked);
                mCartlistener.GoodsChange();
            }
        }
    });

    viewHolder.cartAddCount.setOnNumberChangeListener(new MyAddSubView.OnNumberChangeListener() {
        @Override
        public void onNumberChange(int num) {
            if (mCartlistener !=null){
                mCartlistener.NumChange(i,num);
            }
        }
    });
}

@Override
public int getItemCount() {
    if(list.size()>0){
        for (int i = 0; i <list.size(); i++) {
            checkBoxs.add(new CheckBoxs(false));
            if(checkBoxs.size()==list.size()){
                break;
            }
        }
    }
    return list.size();
}
public void setData(List<Cart.ResultBean> result) {
    list = result;
    notifydatasetChanged();
}


public class ViewHolder extends RecyclerView.ViewHolder {

    private final SimpleDraweeView cartSdvPic;
    private final TextView cartTxtCommodityName;
    private final TextView cartTxtPrice;
    private final MyAddSubView cartAddCount;
    private final CheckBox cb;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        cb = itemView.findViewById(R.id.cb);
        cartSdvPic = itemView.findViewById(R.id.cart_sdv_pic);
        cartTxtCommodityName = itemView.findViewById(R.id.cart_txt_commodityName);
        cartTxtPrice = itemView.findViewById(R.id.cart_txt_price);
        cartAddCount = itemView.findViewById(R.id.cart_add_count);
    }
}

/**
 * 定义接口回调
 */
public interface Cartlistener{
    void GoodsChange();
    void NumChange(int index,int num);
}
private Cartlistener mCartlistener;

public void setCartlistener(Cartlistener cartlistener){
    mCartlistener = cartlistener;
}

/**
 * 计算商品总价
 * @return
 */
public float setsumprice(){
    float num = 0.0f;
    for (int i = 0; i < list.size(); i++) {
        if (checkBoxs.get(i).isCkeck() ==true){
            int count = list.get(i).getCount();
            int price = list.get(i).getPrice();
            num+=count*price;
        }
    }
    return num;
}

/**
 * 改变商品数量
 * @param index
 * @param num
 */

public void changeshopnum(int index,int num){
    list.get(index).setCount(num);
}
public void setAllshopselected(boolean b){
    for (int i = 0; i < checkBoxs.size(); i++) {
        checkBoxs.get(i).setCk(b?true:false);
    }
}

/**
 * 所有商品是否都选中
 * @return
 */
public boolean isAllshopselected(){
    for (int i = 0; i < list.size(); i++) {
        if (checkBoxs.get(i).isCkeck() ==false){
            return false;
        }
    }
    return true;
}

/**
 * 是否所有商品被选中
 * @return
 */
public boolean isAllshopselecteds(){
    mCartlistener.GoodsChange();
    for (int i = 0; i < list.size(); i++) {
        if (checkBoxs.get(i).isCkeck() == false){
            return false;
        }
    }
    return true;
}


public int setshopNum(){
    int shopnum = 0;
    for (int i = 0; i < list.size(); i++) {
        if (checkBoxs.get(i).isCkeck() ==true){
            shopnum += list.get(i).getCount();
        }
    }
    return shopnum;
}

Adapter里的布局

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginleft="10dp"
    android:orientation="horizontal"
    android:padding="5dp">

    <com.facebook.drawee.view.SimpleDraweeView
        android:id="@+id/cart_sdv_pic"
        android:layout_width="150dp"
        android:layout_height="150dp" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/cart_txt_commodityName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margintop="70dp"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/cart_txt_price"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:padding="10dp" />

            <com.bw.sellgoods.MyAddSubView
                android:id="@+id/cart_add_count"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:padding="10dp"></com.bw.sellgoods.MyAddSubView>
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

MyAddSubView

public class MyAddSubView extends LinearLayout implements View.OnClickListener {

private int number = 1;

private TextView sub_tv;

private TextView product_number_tv;

private TextView add_tv;

public MyAddSubView(Context context) {
    this(context, null);
}

public MyAddSubView(Context context, @Nullable AttributeSet attrs) {
    this(context, attrs, 0);
}

public MyAddSubView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    View view = inflate(context, R.layout.cart_add_remove_view_layout, this);

    sub_tv = view.findViewById(R.id.sub_tv);
    product_number_tv = view.findViewById(R.id.product_number_tv);
    add_tv = view.findViewById(R.id.add_tv);


    sub_tv.setOnClickListener(this);
    add_tv.setOnClickListener(this);
}


@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.sub_tv:
            if (number > 1) {
                --number;
                product_number_tv.setText(number + "");
                if (onNumberChangeListener != null) {
                    onNumberChangeListener.onNumberChange(number);
                }
            } else {
                toast.maketext(getContext(), "不能再少了", Toast.LENGTH_SHORT).show();
            }
            break;


        case R.id.add_tv:
            ++number;
            product_number_tv.setText(number + "");
            if (onNumberChangeListener != null) {
                onNumberChangeListener.onNumberChange(number);
            }
            break;
    }
}


public int getNumber() {
    return number;
}

public void setNumber(int number) {
    this.number = number;
    product_number_tv.setText(number + "");
}

OnNumberChangeListener onNumberChangeListener;

public void setOnNumberChangeListener(OnNumberChangeListener onNumberChangeListener) {
    this.onNumberChangeListener = onNumberChangeListener;
}

public interface OnNumberChangeListener {
    void onNumberChange(int num);
}

自定义加减器

<TextView
    android:text="1"
    android:layout_marginLeft="2dp"
    android:background="#ffffff"
    android:layout_weight="1"
    android:id="@+id/product_number_tv"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:gravity="center"
    />

<TextView
    android:layout_marginLeft="2dp"
    android:background="#ffffff"
    android:layout_weight="1"
    android:id="@+id/add_tv"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="+"
    android:textSize="16sp" />

CheckBoxs

public class CheckBoxs {

boolean isCkeck;

public CheckBoxs(boolean isCkeck) {
    this.isCkeck = isCkeck;
}

public boolean isCkeck() {
    return isCkeck;
}

public void setCk(boolean ck) {
    isCkeck = ck;
}

}

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