Android实现淘宝购物车
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
<?xml version="1.0" encoding="utf-8"?>
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=".ui.activity.ShoppingCarActivity"> android:id="@+id/titleBar" android:layout_width="match_parent" android:layout_height="wrap_content" app:rightTitle="管理" app:title="购物车" /> android:id="@+id/hintLayout" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"> android:id="@+id/smartRefreshLayout" android:layout_width="match_parent" android:layout_height="match_parent"> android:layout_width="match_parent" android:layout_height="wrap_content" /> android:id="@+id/rv" android:layout_width="match_parent" android:layout_height="wrap_content" /> android:id="@+id/ll_bottom" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="@dimen/ali_auth_space_10" android:background="#fff" android:gravity="center_vertical" android:padding="15dp"> android:id="@+id/cb_all" android:layout_width="wrap_content" android:layout_height="wrap_content" android:button="@drawable/selector_checkbox_green" android:text="全选" /> android:layout_width="0dp" android:layout_height="1dp" android:layout_weight="1" /> android:id="@+id/ll" android:layout_width="wrap_content" android:layout_height="wrap_content"> android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="合计：" android:textColor="#333" android:textSize="15sp" /> android:id="@+id/tv_total_price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5dp" android:text="￥0.00" android:textColor="#DA3527" android:textSize="24sp" /> android:id="@+id/tv_buy" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:background="@drawable/shape_red10" android:paddingLeft="15dp" android:paddingTop="5dp" android:paddingRight="15dp" android:paddingBottom="5dp" android:text="结算" android:textColor="#fff" android:textSize="18sp" />
android:id="@+id/tv_del" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/shape_stroke_red15" android:paddingLeft="15dp" android:paddingTop="5dp" android:paddingRight="15dp" android:paddingBottom="5dp" android:text="删除" android:textColor="#DA3527" android:textSize="18sp" android:visibility="gone" /> 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 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 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 <?xml version="1.0" encoding="utf-8"?> android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="15dp" android:layout_marginTop="10dp" android:layout_marginRight="15dp" android:background="@drawable/shape_white5" android:orientation="vertical" android:paddingLeft="10dp" android:paddingTop="15dp" android:paddingRight="15dp" android:paddingBottom="20dp"> android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical"> android:id="@+id/cb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:button="@drawable/selector_checkbox_green" /> android:id="@+id/iv_shopicon" android:layout_width="25dp" android:layout_height="25dp" android:layout_marginLeft="10dp" /> android:id="@+id/tv_shopname" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:textColor="#333" android:textSize="15sp" android:textStyle="bold" /> android:id="@+id/ll" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> 商品条目布局layout_item_car <?xml version="1.0" encoding="utf-8"?> android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingTop="10dp" android:paddingBottom="5dp"> android:id="@+id/cb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:button="@drawable/selector_checkbox_green" /> android:id="@+id/iv" android:layout_width="75dp" android:layout_height="75dp" android:layout_centerVertical="true" android:layout_marginLeft="8dp" android:layout_toRightOf="@id/cb" /> android:id="@+id/tv_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_toRightOf="@id/iv" android:ellipsize="end" android:maxLines="2" android:textColor="#333" android:textSize="15sp" /> android:id="@+id/tv_guige" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/tv_title" android:layout_marginLeft="10dp" android:layout_marginTop="3dp" android:layout_toRightOf="@id/iv" android:background="@drawable/shape_gray5" android:paddingLeft="3dp" android:paddingRight="3dp" android:textColor="#C1C1C1" android:textSize="10sp" /> android:id="@+id/tv_price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/tv_guige" android:layout_marginLeft="10dp" android:layout_marginTop="8dp" android:layout_toRightOf="@id/iv" android:textColor="#DA3527" android:textSize="18sp" /> android:layout_width="wrap_content" android:layout_height="25dp" android:layout_below="@id/tv_guige" android:layout_alignParentRight="true" android:layout_marginTop="8dp" android:layout_marginBottom="5dp" android:background="@drawable/stroke_gray2"> android:id="@+id/tv_des" android:layout_width="25dp" android:layout_height="match_parent" android:gravity="center" android:text="-" android:textColor="#cccccc" /> android:layout_width="0.5dp" android:layout_height="match_parent" android:background="#cccccc" /> android:id="@+id/tv_count" android:layout_width="30dp" android:layout_height="match_parent" android:gravity="center" /> android:layout_width="0.5dp" android:layout_height="match_parent" android:background="#cccccc" /> android:id="@+id/tv_add" android:layout_width="25dp" android:layout_height="match_parent" android:gravity="center" android:text="+" android:textColor="#cccccc" /> 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。 您可能感兴趣的文章: