MVP請求數據自行解決
MainActivity
package com.zjh.administrat.shopping_cartdemo.view;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ExpandableListView;
import android.widget.TextView;
import com.zjh.administrat.shopping_cartdemo.R;
import com.zjh.administrat.shopping_cartdemo.adapter.MyAdapter;
import com.zjh.administrat.shopping_cartdemo.bean.ShoppingBean;
import com.zjh.administrat.shopping_cartdemo.presenter.IPresenterImpl;
import java.util.HashMap;
import java.util.Map;
public class MainActivity extends AppCompatActivity implements IView {
private String urlStr = "http://www.zhaoapi.cn/product/getCarts";
private IPresenterImpl iPresenter;
private ExpandableListView el_cart;
private CheckBox cb_cart_all_select;
private TextView tv_cart_total_price;
private Button btn_cart_pay;
private MyAdapter adapter;
private ShoppingBean data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
adapter = new MyAdapter(this);
el_cart.setAdapter(adapter);
}
//初始化view
private void initData() {
iPresenter = new IPresenterImpl(this);
Map<String, String> map = new HashMap<>();
map.put("uid", "71");
iPresenter.pRequestData(urlStr, map, ShoppingBean.class);
}
//B.刷新checkbox狀態和總價和總數量
private void refreshSelectedAndTotalPriceAndTotalNumber() {
//去判斷是否所有得商品都被選中
boolean allProductsSelected = adapter.isAllProductsSelected();
//設置給全選
cb_cart_all_select.setChecked(allProductsSelected);
//計算總價
float totalPrice = adapter.calculateTotalPrice();
tv_cart_total_price.setText("總價:¥"+totalPrice);
//計算總數量
int totalNumber = adapter.calculateTotalNumber();
btn_cart_pay.setText("去結算("+totalNumber+")");
}
//初始化的操作
private void initView() {
el_cart = findViewById(R.id.el_cart);
cb_cart_all_select = findViewById(R.id.cb_cart_all_select);
tv_cart_total_price = findViewById(R.id.tv_cart_total_price);
btn_cart_pay = findViewById(R.id.btn_cart_pay);
//全選按鈕
findViewById(R.id.cb_cart_all_select).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//底部全選按鈕選中的時候所有得商品都被選中
boolean allProductsSelected = adapter.isAllProductsSelected();
adapter.changeAllProductStatus(!allProductsSelected);
adapter.notifyDataSetChanged();
//刷新底部數據
refreshSelectedAndTotalPriceAndTotalNumber();
}
});
}
//獲取數據
@Override
public void viewData(Object object) {
data = (ShoppingBean) object;
adapter.setDatas(data.getData());
for (int p = 0; p < data.getData().size(); p++) {
el_cart.expandGroup(p);
}
//回調方法
adapter.setOnCartListChangeListener(new MyAdapter.OnCartListChangeListener() {
@Override
public void onSellerCheckedChange(int i) {
//商家被點擊
boolean currentSellerAllProductSelected = adapter.isCurrentSellerAllProductSelected(i);
adapter.changeCurrentSellerAllProductsStatus(i, !currentSellerAllProductSelected);
adapter.notifyDataSetChanged();
//B.刷新底部數據
refreshSelectedAndTotalPriceAndTotalNumber();
}
@Override
public void onProductCheckedChange(int i, int i1) {
//點擊商品得複選框
adapter.changeCurrentProductStatus(i, i1);
adapter.notifyDataSetChanged();
//B.刷新底部數據
refreshSelectedAndTotalPriceAndTotalNumber();
}
@Override
public void onProducNumberChange(int i, int i1, int number) {
//當加減被點擊
adapter.changeCurrentProductNumber(i, i1, number);
adapter.notifyDataSetChanged();
//B.刷新底部數據
refreshSelectedAndTotalPriceAndTotalNumber();
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
iPresenter.onDetch();
}
}
AddSubView自定(商品數量)
package com.zjh.administrat.shopping_cartdemo.view;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.zjh.administrat.shopping_cartdemo.R;
public class AddSubView extends LinearLayout implements View.OnClickListener {
private int number = 1;
private TextView sub_tv, product_number_tv, add_tv;
public AddSubView(Context context) {
this(context,null);
}
public AddSubView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public AddSubView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
View view = inflate(context, R.layout.add_remove, 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 (mNumberChangeListener != null) {
mNumberChangeListener.onNumberChange(number);
}
} else {
Toast.makeText(getContext(), "我是有底線的", Toast.LENGTH_SHORT).show();
}
break;
case R.id.add_tv:
if (number < 9) {
++number;
product_number_tv.setText(number+"");
if (mNumberChangeListener != null) {
mNumberChangeListener.onNumberChange(number);
}
} else {
Toast.makeText(getContext(), "每人限購10件", Toast.LENGTH_SHORT).show();
}
break;
default:
break;
}
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
product_number_tv.setText(number+"");
}
//成員變量
OnNumberChangeListener mNumberChangeListener;
public void setOnNumberChangeListener(OnNumberChangeListener onNumberChangeListener) {
this.mNumberChangeListener = onNumberChangeListener;
}
public interface OnNumberChangeListener {
void onNumberChange(int number);
}
}
MyAdapter適配器
package com.zjh.administrat.shopping_cartdemo.adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.zjh.administrat.shopping_cartdemo.R;
import com.zjh.administrat.shopping_cartdemo.bean.ShoppingBean;
import com.zjh.administrat.shopping_cartdemo.view.AddSubView;
import java.util.ArrayList;
import java.util.List;
public class MyAdapter extends BaseExpandableListAdapter {
private List<ShoppingBean.DataBean> list;
private Context mContext;
public MyAdapter(Context context) {
mContext = context;
list = new ArrayList<>();
}
public void setDatas(List<ShoppingBean.DataBean> data) {
if (data != null){
list.addAll(data);
}
notifyDataSetChanged();
}
@Override
public int getGroupCount() {
return list.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return list.get(groupPosition).getList().size();
}
@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
ShoppingBean.DataBean dataBean = list.get(groupPosition);
ParentViewHolder parentViewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.item_cart_parent, parent, false);
parentViewHolder = new ParentViewHolder(convertView);
convertView.setTag(parentViewHolder);
} else {
parentViewHolder = (ParentViewHolder) convertView.getTag();
}
parentViewHolder.seller_name_tv.setText(dataBean.getSellerName());
boolean currentSellerAllProductSelected = isCurrentSellerAllProductSelected(groupPosition);
parentViewHolder.seller_cb.setChecked(currentSellerAllProductSelected);
//D.設置點擊CheckBox
parentViewHolder.seller_cb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mOnCartListChangeListener != null) {
mOnCartListChangeListener.onSellerCheckedChange(groupPosition);
}
}
});
return convertView;
}
@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
ChildViewHolder childViewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.item_cart_child, parent, false);
childViewHolder = new ChildViewHolder(convertView);
convertView.setTag(childViewHolder);
} else {
childViewHolder = (ChildViewHolder) convertView.getTag();
}
//設置商品名字
childViewHolder.product_title_name_tv.setText(list.get(groupPosition).getList().get(childPosition).getTitle());
//設置商品單價
childViewHolder.product_price_tv.setText("¥:"+list.get(groupPosition).getList().get(childPosition).getPrice()+"");
//設置複選框是否選中
childViewHolder.child_cb.setChecked(list.get(groupPosition).getList().get(childPosition).getSelected() == 1);
//設置組合式自定義控件內部的數量
childViewHolder.add_remove_view.setNumber(list.get(groupPosition).getList().get(childPosition).getNum());
String str = "";
int length = list.get(groupPosition).getList().get(childPosition).getImages().length();
for (int j = 0; j < length; j++) {
if (list.get(groupPosition).getList().get(childPosition).getImages().substring(j, j + 1).equals("|")) {
str = list.get(groupPosition).getList().get(childPosition).getImages().substring(j + 1, length).trim();
}
}
Glide.with(mContext).load(str).into(childViewHolder.product_icon_iv);
//D.設置商品CheckBox的點擊事件,通過接口回調,暴露給外面
childViewHolder.child_cb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mOnCartListChangeListener != null) {
mOnCartListChangeListener.onProductCheckedChange(groupPosition, childPosition);
}
}
});
//D.設置商品數量的點擊事件,通過接口回調,暴露給外面
childViewHolder.add_remove_view.setOnNumberChangeListener(new AddSubView.OnNumberChangeListener() {
@Override
public void onNumberChange(int number) {
if (mOnCartListChangeListener != null){
mOnCartListChangeListener.onProducNumberChange(groupPosition, childPosition, number);
}
}
});
return convertView;
}
public boolean isCurrentSellerAllProductSelected (int i){
//根據商品改變商家--如果商品全部選中商家則選中--有一個商品沒選中則商家不選中
ShoppingBean.DataBean dataBean = list.get(i);
List<ShoppingBean.DataBean.ListBean> beans = dataBean.getList();
for (ShoppingBean.DataBean.ListBean bean : beans) {
if (bean.getSelected() == 0) {
return false;
}
}
return true;
}
public boolean isAllProductsSelected () {
//根據商品改變全選--如果商品全部選中全選則選中--有一個商品沒選中則全選不選中
for (int x = 0; x < list.size(); x++) {
ShoppingBean.DataBean dataBean = list.get(x);
List<ShoppingBean.DataBean.ListBean> list1 = dataBean.getList();
for (int j = 0; j < list1.size(); j++) {
if (list1.get(j).getSelected() == 0) {
return false;
}
}
}
return true;
}
public int calculateTotalNumber () {
//計算總數量
int totalNumber = 0;
for (int i = 0; i < list.size(); i++) {
ShoppingBean.DataBean dataBean = list.get(i);
List<ShoppingBean.DataBean.ListBean> list1 = dataBean.getList();
for (int j = 0; j < list1.size(); j++) {
if (list1.get(j).getSelected() == 1) {
int num = list1.get(j).getNum();
totalNumber += num;
}
}
}
return totalNumber;
}
public float calculateTotalPrice () {
//獲取總價
float totalPrice = 0;
for (int i = 0; i < list.size(); i++) {
ShoppingBean.DataBean dataBean = list.get(i);
List<ShoppingBean.DataBean.ListBean> list1 = dataBean.getList();
for (int j = 0; j < list1.size(); j++) {
if (list1.get(j).getSelected() == 1) {
float price = (float) list1.get(j).getPrice();
int num = list1.get(j).getNum();
totalPrice += price * num;
}
}
}
return totalPrice;
}
//C.當商品組的全選框點擊時,更新所有商品的狀態
public void changeCurrentSellerAllProductsStatus ( int i, boolean isSelected){
ShoppingBean.DataBean dataBean = list.get(i);
List<ShoppingBean.DataBean.ListBean> beans = dataBean.getList();
for (int j = 0; j < beans.size(); j++) {
ShoppingBean.DataBean.ListBean bean = beans.get(j);
bean.setSelected(isSelected ? 1 : 0);
}
}
//C.當商家子條目的全選框選中時,更新其狀態
public void changeCurrentProductStatus ( int i, int i1){
ShoppingBean.DataBean dataBean = list.get(i);
List<ShoppingBean.DataBean.ListBean> list1 = dataBean.getList();
ShoppingBean.DataBean.ListBean listBean = list1.get(i1);
listBean.setSelected(listBean.getSelected() == 0 ? 1 : 0);
}
//C.設置所有商品的狀態
public void changeAllProductStatus (boolean selected){
for (int x = 0; x < list.size(); x++) {
ShoppingBean.DataBean dataBean = list.get(x);
List<ShoppingBean.DataBean.ListBean> list1 = dataBean.getList();
for (int j = 0; j < list1.size(); j++) {
list1.get(j).setSelected(selected ? 1 : 0);
}
}
}
//C.當加減器被點擊時,調用,改變裏面當前商品的數量 參數1定位那個商家 參數2定位哪個商品 參數3定位改變具體的數量是多少
public void changeCurrentProductNumber (int i, int i1, int number){
ShoppingBean.DataBean dataBean = list.get(i);
List<ShoppingBean.DataBean.ListBean> list = dataBean.getList();
ShoppingBean.DataBean.ListBean listBean = list.get(i1);
listBean.setNum(number);
}
//成員變量
OnCartListChangeListener mOnCartListChangeListener;
//D.方法的set
public void setOnCartListChangeListener (OnCartListChangeListener onCartListChangeListener){
mOnCartListChangeListener = onCartListChangeListener;
}
public interface OnCartListChangeListener {
//當商家的checkBox點擊時回調
void onSellerCheckedChange(int i);
//當點擊子條目商品的CheckBox回調
void onProductCheckedChange(int i, int i1);
//當點擊加減按鈕的回調
void onProducNumberChange(int i, int i1, int number);
}
public static class ParentViewHolder {
public CheckBox seller_cb;
public TextView seller_name_tv;
public ParentViewHolder(View rootView) {
seller_cb = rootView.findViewById(R.id.seller_cb);
seller_name_tv = rootView.findViewById(R.id.seller_name_tv);
}
}
public static class ChildViewHolder {
public CheckBox child_cb;
public ImageView product_icon_iv;
public TextView product_title_name_tv;
public TextView product_price_tv;
public AddSubView add_remove_view;
public ChildViewHolder(View rootView) {
child_cb = rootView.findViewById(R.id.child_cb);
product_icon_iv = rootView.findViewById(R.id.product_icon_iv);
product_title_name_tv = rootView.findViewById(R.id.product_title_name_tv);
product_price_tv = rootView.findViewById(R.id.product_price_tv);
add_remove_view = rootView.findViewById(R.id.add_remove_view);
}
}
@Override
public boolean isChildSelectable ( int groupPosition, int childPosition){
return false;
}
@Override
public Object getGroup ( int groupPosition){
return null;
}
@Override
public Object getChild ( int groupPosition, int childPosition){
return null;
}
@Override
public long getGroupId ( int groupPosition){
return 0;
}
@Override
public long getChildId ( int groupPosition, int childPosition){
return 0;
}
@Override
public boolean hasStableIds () {
return false;
}
}
以下是佈局
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
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=".view.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="購 物 車"
android:textSize="30sp"
android:textColor="#f00"
android:textStyle="bold"
android:gravity="center"
android:background="#fffc"
/>
<ExpandableListView
android:id="@+id/el_cart"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="9" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="#94cc"
android:layout_weight="1"
android:gravity="center_vertical">
<CheckBox
android:id="@+id/cb_cart_all_select"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25sp"
android:text="全選" />
<TextView
android:id="@+id/tv_cart_total_price"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingLeft="20dp"
android:textSize="30sp"
android:textColor="#f00"
android:text="合計:¥0.00" />
<Button
android:id="@+id/btn_cart_pay"
android:layout_width="120dp"
android:layout_height="match_parent"
android:textSize="20sp"
android:text="去結算[0]"
android:background="#cc4"
android:textStyle="bold"/>
</LinearLayout>
</LinearLayout>
item_cart_parent.xml商家
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:orientation="horizontal">
<CheckBox
android:id="@+id/seller_cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/seller_name_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="30sp"
android:textStyle="bold"
/>
</LinearLayout>
item_cart_parent.xml商品
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:orientation="horizontal">
<CheckBox
android:id="@+id/child_cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="@+id/product_icon_iv"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginLeft="20dp"
android:scaleType="centerCrop"
android:src="@color/colorPrimary" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="8"
android:orientation="vertical">
<TextView
android:id="@+id/product_title_name_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="2"
android:textSize="20sp"
android:text="商品標題" />
<TextView
android:id="@+id/product_price_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:textSize="25sp"
android:textColor="#f00"
android:textStyle="bold"
android:text="¥0.0" />
</LinearLayout>
<com.zjh.administrat.shopping_cartdemo.view.AddSubView
android:id="@+id/add_remove_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
add_remove.xml加減數量
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="60dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical"
android:background="#99fff0"
android:gravity="center_vertical"
android:padding="2dp">
<TextView
android:id="@+id/sub_tv"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#ffffff"
android:gravity="center"
android:text="-"
android:textSize="16sp" />
<TextView
android:id="@+id/product_number_tv"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginLeft="2dp"
android:textSize="20sp"
android:textColor="#f00"
android:layout_weight="1"
android:background="#ffffff"
android:gravity="center"
android:text="1" />
<TextView
android:id="@+id/add_tv"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginLeft="2dp"
android:layout_weight="1"
android:background="#ffffff"
android:gravity="center"
android:text="+"
android:textSize="16sp" />
</LinearLayout>