本文实例为大家分享了Android实现淘宝购物车的具体代码，供大家参考，具体内容如下
功能基本和淘宝购物车一样，商品按照店铺分类显示，全选，反选，选中商品数量变化，总价随之变化。效果图
思路：店铺和商品都增加一个select属性，列表的CheckBox选择或未选中状态改变同时设置店铺和商品的select属性，每次CheckBox状态改变设置select的值等于cb.isChecked()
购物车页面布局文件activity_shopping_car
Java代码
public class ShoppingCarActivity extends MyActivity implements StatusAction {
@BindView(R.id.titleBar)
TitleBar titleBar;
@BindView(R.id.rv)
RecyclerView rv;
@BindView(R.id.hintLayout)
HintLayout hintLayout;
@BindView(R.id.ll_bottom)
LinearLayout ll_bottom;
@BindView(R.id.ll)
LinearLayout ll;
@BindView(R.id.tv_total_price)
TextView tv_total_price;
@BindView(R.id.tv_del)
TextView tv_del;
@BindView(R.id.cb_all)
CheckBox cb_all;
@BindView(R.id.smartRefreshLayout)
SmartRefreshLayout smartRefreshLayout;
private ShoppingCarAdapter shoppingCarAdapter;
private int total_page, page = 1;
@Override
protected int getLayoutId() {
return R.layout.activity_shopping_car;
}
@Override
protected void initView() {
setOnClickListener(R.id.tv_buy, R.id.tv_del);
}
@Override
protected void initData() {
EventBus.getDefault().register(this);
//网络请求 获取购物车数据
getCarData();
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, RecyclerView.VERTICAL, false);
rv.setLayoutManager(linearLayoutManager);
shoppingCarAdapter = new ShoppingCarAdapter(this);
//商品选中价格改变回调
shoppingCarAdapter.setOnPriceChangeListener(new ShoppingCarAdapter.OnPriceChangeListener() {
@Override
public void onClick(boolean allSelect, String totalPrice) {
cb_all.setChecked(allSelect);
tv_total_price.setText("￥" + totalPrice);
}
});
rv.setAdapter(shoppingCarAdapter);
//全选 反选
cb_all.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (shoppingCarAdapter != null && shoppingCarAdapter.getData() != null) {
for (int i = 0; i < shoppingCarAdapter.getData().size(); i++) {
shoppingCarAdapter.getData().get(i).setSelect(cb_all.isChecked());
for (int j = 0; j < shoppingCarAdapter.getData().get(i).getItem_data().size(); j++) {
shoppingCarAdapter.getData().get(i).getItem_data().get(j).setSelect(cb_all.isChecked());
}
}
shoppingCarAdapter.notifyDataSetChanged();
shoppingCarAdapter.calculatePrice();
}
}
});
smartRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh(@NonNull RefreshLayout refreshLayout) {
page = 1;
getCarData();
refreshLayout.finishRefresh();
}
}).setOnLoadMoreListener(new OnLoadMoreListener() {
@Override
public void onLoadMore(@NonNull RefreshLayout refreshLayout) {
if (page <= total_page) {
getCarData();
}
refreshLayout.finishLoadMore();
}
});
}
@Subscribe(threadMode = ThreadMode.MAIN)
public void onGetMessage(MessageWrap message) {
if (message.message.equals("refresh_car")) {
getCarData();
}
}
@Override
public void onDestroy() {
super.onDestroy();
EventBus.getDefault().unregister(this);
}
@Override
public void onRightClick(View v) {
if (titleBar.getRightTitle().equals("管理")) {
titleBar.setRightTitle("完成");
ll.setVisibility(View.GONE);
tv_del.setVisibility(View.VISIBLE);
} else if (titleBar.getRightTitle().equals("完成")) {
titleBar.setRightTitle("管理");
ll.setVisibility(View.VISIBLE);
tv_del.setVisibility(View.GONE);
}
}
@SingleClick
@Override
public void onClick(View v) {
switch (v.getId()) {
//点击结算
case R.id.tv_buy:
if (shoppingCarAdapter != null && shoppingCarAdapter.getData() != null) {
JSONArray ja = new JSONArray();
for (ShoppingCarBean shoppingCarBean : shoppingCarAdapter.getData()) {
JSONArray array = new JSONArray();
JSONObject object = null;
for (ShoppingCarBean.ItemDataBean itemDataBean : shoppingCarBean.getItem_data())
if (itemDataBean.isSelect()) {
object = new JSONObject();
if (StringUtils.isNotNullOrEmpty(shoppingCarBean.getShop().getShop_id()))
object.put("shop_id", shoppingCarBean.getShop().getShop_id());
else
object.put("shop_id", 1);
JSONObject object1 = new JSONObject();
object1.put("item_id", itemDataBean.getItem_id());
object1.put("count", itemDataBean.getCount());
object1.put("cart_id", itemDataBean.getCart_id());
object1.put("sku_id", itemDataBean.getSku_id());
array.add(object1);
object.put("items", array);
}
if (object != null)
ja.add(object);
}
// Log.i("logger", "onClick: " + JSONObject.toJSONString(ja));
if (ja != null && ja.size() > 0) {
//提交
confirmOrder(ja);
} else
toast("请选择商品");
}
break;
case R.id.tv_del:
if (shoppingCarAdapter != null && shoppingCarAdapter.getData() != null) {
List list = new ArrayList<>();
for (ShoppingCarBean shoppingCarBean : shoppingCarAdapter.getData()) {
for (ShoppingCarBean.ItemDataBean itemDataBean : shoppingCarBean.getItem_data())
if (itemDataBean.isSelect()) {
list.add(itemDataBean.getCart_id());
}
}
delCart(list);
}
break;
}
}
@Override
public HintLayout getHintLayout() {
return hintLayout;
}
}
adapter代码
public final class ShoppingCarAdapter extends MyAdapter{ public ShoppingCarAdapter(Context context) { super(context); } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { return new ViewHolder(); } final class ViewHolder extends MyAdapter.ViewHolder { @BindView(R.id.cb) CheckBox cb; @BindView(R.id.iv_shopicon) ImageView iv_shopicon; @BindView(R.id.tv_shopname) TextView tv_shopname; @BindView(R.id.ll) LinearLayout linearLayout; ViewHolder() { super(R.layout.item_car); } @Override public void onBindView(int position) { ShoppingCarBean bean = getItem(position); tv_shopname.setText(bean.getShop().getShop_name()); cb.setChecked(bean.isSelect()); //每次添加前先移除所有布局 linearLayout.removeAllViews(); if (bean.getItem_data() != null) { //动态添加商品列表 for (int i = 0; i < bean.getItem_data().size(); i++) { View view = LayoutInflater.from(getContext()).inflate(R.layout.layout_item_car, null); CheckBox c_cb = view.findViewById(R.id.cb); ImageView iv_cover = view.findViewById(R.id.iv); TextView tv_title = view.findViewById(R.id.tv_title); TextView tv_guige = view.findViewById(R.id.tv_guige); TextView tv_price = view.findViewById(R.id.tv_price); TextView tv_count = view.findViewById(R.id.tv_count); TextView tv_des = view.findViewById(R.id.tv_des); TextView tv_add = view.findViewById(R.id.tv_add); tv_title.setText(bean.getItem_data().get(i).getTitle()); tv_price.setText("￥" + bean.getItem_data().get(i).getZk_price()); tv_count.setText("" + bean.getItem_data().get(i).getCount()); tv_guige.setText(bean.getItem_data().get(i).getSku()); Glide.with(getContext()).load(bean.getItem_data().get(i).getPic()) .transform(new RoundedCorners((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5, getContext().getResources().getDisplayMetrics()))) .into(iv_cover); if (bean.isSelect()) { c_cb.setChecked(true); } else { c_cb.setChecked(bean.getItem_data().get(i).isSelect()); } int finalI = i; tv_des.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (bean.getItem_data().get(finalI).getCount() > 1) { bean.getItem_data().get(finalI).setCount(bean.getItem_data().get(finalI).getCount()-1); tv_count.setText(bean.getItem_data().get(finalI).getCount()+""); calculatePrice(); } else ToastUtils.show("不能再少了哦~"); } }); tv_add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { bean.getItem_data().get(finalI).setCount(bean.getItem_data().get(finalI).getCount()+1); tv_count.setText(bean.getItem_data().get(finalI).getCount()+""); calculatePrice(); } }); c_cb.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { boolean select = true; bean.getItem_data().get(finalI).setSelect(c_cb.isChecked()); for (int j = 0; j < bean.getItem_data().size(); j++) { if (bean.getItem_data().get(j).isSelect() == false) { select = false; break; } } bean.setSelect(select); notifyDataSetChanged(); calculatePrice(); } }); view.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(getContext(), ShoppingDetailActivity.class); intent.putExtra("item_id", bean.getItem_data().get(finalI).getItem_id()); startActivity(intent); } }); linearLayout.addView(view); } } cb.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { bean.setSelect(cb.isChecked()); for (int j = 0; j < bean.getItem_data().size(); j++) { bean.getItem_data().get(j).setSelect(cb.isChecked()); } notifyDataSetChanged(); calculatePrice(); } }); } } public interface OnPriceChangeListener { void onClick(boolean allSelect, String totalPrice); } private OnPriceChangeListener onPriceChangeListener; public void setOnPriceChangeListener(OnPriceChangeListener onPriceChangeListener) { this.onPriceChangeListener = onPriceChangeListener; } public void calculatePrice() { if (onPriceChangeListener != null) { BigDecimal total = new BigDecimal("0.00"); boolean allSelect = true; List list = getData(); for (int i = 0; i < getItemCount(); i++) { if (list.get(i).isSelect() == false) allSelect = false; for (int j = 0; j < list.get(i).getItem_data().size(); j++) { if (list.get(i).getItem_data().get(j).isSelect()) { BigDecimal multiply = new BigDecimal(list.get(i).getItem_data().get(j).getZk_price()).multiply(new BigDecimal(list.get(i).getItem_data().get(j).getCount())); BigDecimal price = new BigDecimal(multiply + ""); total = total.add(price); } } } onPriceChangeListener.onClick(allSelect, total + ""); } } }
RecyclerView条目布局item_car
商品条目布局layout_item_car
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。