购物车逻辑 + MVP + 接口回调 +自定义View +拦截器 单例模式+二级列表商品+全选反选+计算总价+加减价格联动
Mainactivity
package com.example.shoppingcart;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import com.example.shoppingcart.adapter.CartAdapter;
import com.example.shoppingcart.api.ProductApi;
import com.example.shoppingcart.callback.CartUICallBack;
import com.example.shoppingcart.entity.DataBean;
import com.example.shoppingcart.presenter.DataPresenter;
import com.example.shoppingcart.util.OkHttpCallback;
import com.example.shoppingcart.view.DataView;
import com.jcodecraeer.xrecyclerview.XRecyclerView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class MainActivity extends AppCompatActivity implements DataView.ClsView,XRecyclerView.LoadingListener,CartUICallBack {
private XRecyclerView rv;
private CheckBox checkbox;
private DataPresenter dataPresenter;
private CartAdapter cartAdapter;
private List carts;
private int page = 1;
private HashMap map;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
}
private void initData() {
//初始化Presenter
dataPresenter = new DataPresenter(this);
carts = new ArrayList<>();
//刷新加载
shuxinData();
//设置布局管理器
rv.setLayoutManager(new LinearLayoutManager(MainActivity.this,OrientationHelper.VERTICAL,false));
checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked){
for (DataBean.Cart cart : carts) {
cart .isChecked = true;
for (DataBean.Cart.Product product : cart.list) {
product.isProductChecked = true;
}
}
}
else {
for (DataBean.Cart cart : carts) {
cart .isChecked = false;
for (DataBean.Cart.Product product : cart.list) {
product.isProductChecked = false;
}
}
}
cartAdapter.notifyDataSetChanged();
getPrice();
}
});
}
private void shuxinData() {
map = new HashMap<>();
map.put("uid","71");
map.put("page",page+"");
dataPresenter.getdatabean(map);
}
private void initView() {
rv = (XRecyclerView) findViewById(R.id.rv);
checkbox = (CheckBox) findViewById(R.id.checkbox);
cartAdapter = new CartAdapter(MainActivity.this);
rv.setAdapter(cartAdapter);
cartAdapter.setUICallBack(this);
rv.setLoadingListener(this);
//允许加载刷新
rv.setLoadingMoreEnabled(true);
rv.setPullRefreshEnabled(true);
}
private void getPrice() {
double totaprice = 0;
for (DataBean.Cart cart : carts) {
for (DataBean.Cart.Product product : cart.list) {
if (product.isProductChecked){
totaprice += product.price*product.productNum;
}
}
}
checkbox.setText("￥"+totaprice);
}
@Override
public void success(List list) {
if (list != null){
carts=list;
for (DataBean.Cart cart : carts) {
for (DataBean.Cart.Product product : cart.list) {
product.productNum=1;
}
}
if (page==1){
cartAdapter.setData(list);
}else {
cartAdapter.addData(list);
}
}
}
@Override
public void defeated(String msg) {
}
@Override
public void prodeuctsuccess(List list_product) {
}
@Override
public void prodeuctdefeated(String msg) {
}
//刷新
@Override
public void onRefresh() {
page = 1;
shuxinData();
rv.refreshComplete();
}
//加载更多
@Override
public void onLoadMore() {
page++;
shuxinData();
rv.loadMoreComplete();
}
//接口上面继承生成此方法
@Override
public void notifyCart() {
getPrice();
}
}
Mainactivity布局
Api
package com.example.shoppingcart.api;
public class Api {
public final static String BASE_URL = "http://www.zhaoapi.cn/";
}
ProductApi
package com.example.shoppingcart.api;
public class ProductApi {
//购物车
public final static String CART_URL = Api.BASE_URL+"product/getCarts";
}
DataView
package com.example.shoppingcart.view;
import com.example.shoppingcart.entity.DataBean;
import com.example.shoppingcart.model.DataModel;
import com.example.shoppingcart.util.OkHttpCallback;
import java.util.HashMap;
import java.util.List;
/**
* 存放接口
*/
public interface DataView {
public interface ClsView{
void success(List list);
void defeated(String msg);
void prodeuctsuccess(List list_product);
void prodeuctdefeated(String msg);
}
public interface ClsModel{
void getdatabean(String url,HashMap params,DataModel.ClsModelCallback callback);
}
public interface ClsPresenter{
void getdatabean(HashMap params);
}
}
OkHttpUtils
package com.example.shoppingcart.util;
import android.os.Handler;
import com.example.shoppingcart.api.ProductApi;
import com.example.shoppingcart.entity.DataBean;
import com.example.shoppingcart.model.DataModel;
import com.example.shoppingcart.view.DataView;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;
public class OkHttpUtils{
private Handler handler = new Handler();
private static OkHttpUtils instance = new OkHttpUtils();
private OkHttpClient okHttpClient;
public static OkHttpUtils getInstance() {
if (instance == null){
synchronized (OkHttpUtils.class){
instance = new OkHttpUtils();
}
}
return instance;
}
private OkHttpUtils(){
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
okHttpClient = new OkHttpClient.Builder()
.connectTimeout(5,TimeUnit.SECONDS)
.readTimeout(5,TimeUnit.SECONDS)
.writeTimeout(5,TimeUnit.SECONDS)
.addInterceptor(interceptor)
.build();
}
public void doGet(String url, HashMap params, final OkHttpCallback okHttpCallback) {
Request request = new Request.Builder()
.get()
.url(url)
.build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (okHttpCallback != null){
handler.post(new Runnable() {
@Override
public void run() {
okHttpCallback.defeated("网络异常啦");
}
});
}
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (okHttpCallback != null){
if (200 == response.code()){
final String result = response.body().string();
handler.post(new Runnable() {
@Override
public void run() {
okHttpCallback.success(result);
}
});
}
}
}
});
}
public void doPost(String url, HashMap params, final OkHttpCallback okHttpCallback) {
FormBody.Builder builder = new FormBody.Builder();
for (Map.Entry map : params.entrySet()){
builder.add(map.getKey(),map.getValue());
}
FormBody formbody = builder.build();
Request request = new Request.Builder()
.url(url)
.post(formbody)
.build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (okHttpCallback != null){
handler.post(new Runnable() {
@Override
public void run() {
okHttpCallback.defeated("网络异常啦");
}
});
}
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (okHttpCallback != null){
if (200 == response.code()){
final String result = response.body().string();
handler.post(new Runnable() {
@Override
public void run() {
okHttpCallback.success(result);
}
});
}
}
}
});
}
}
OkHttpCallback
package com.example.shoppingcart.util;
public interface OkHttpCallback {
void success(String result);
void defeated(String msg);
}
DataModel
package com.example.shoppingcart.model;
import com.example.shoppingcart.api.ProductApi;
import com.example.shoppingcart.util.OkHttpUtils;
import com.example.shoppingcart.view.DataView;
import com.example.shoppingcart.util.OkHttpCallback;
import java.util.HashMap;
/**
* 购物车Model层
*/
public class DataModel implements DataView.ClsModel {
@Override
public void getdatabean(String url,HashMap params,final ClsModelCallback callback) {
OkHttpUtils.getInstance().doPost(ProductApi.CART_URL,params, new OkHttpCallback() {
@Override
public void success(String result) {
if (callback != null){
callback.datasuccess(result);
}
}
@Override
public void defeated(String msg) {
if (callback != null){
callback.datadefeated();
}
}
});
}
public interface ClsModelCallback{
void datasuccess(String result);
void datadefeated();
}
}
DataPresenter
package com.example.shoppingcart.presenter;
import com.example.shoppingcart.api.ProductApi;
import com.example.shoppingcart.entity.DataBean;
import com.example.shoppingcart.util.OkHttpUtils;
import com.example.shoppingcart.view.DataView;
import com.example.shoppingcart.model.DataModel;
import com.example.shoppingcart.util.OkHttpCallback;
import com.google.gson.Gson;
import java.util.HashMap;
public class DataPresenter implements DataView.ClsPresenter {
private DataModel dataModel;
private DataView.ClsView dataView;
public DataPresenter(DataView.ClsView view){
this.dataModel = new DataModel();
this.dataView = view;
}
public void getdatabean(HashMap params) {
dataModel.getdatabean(ProductApi.CART_URL,params, new DataModel.ClsModelCallback() {
@Override
public void datasuccess(String result) {
DataBean dataBean = new Gson().fromJson(result, DataBean.class);
dataView.success(dataBean.data);
}
@Override
public void datadefeated() {
dataView.defeated("msg");
}
});
}
}
AddMinusView(自定义View加减器)
package com.example.shoppingcart.widget;
import android.content.Context;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.example.shoppingcart.R;
public class AddMinusView extends LinearLayout {
private TextView jian ,jia;
private EditText et_num;
private int num = 1;
public AddMinusView(Context context) {
this(context,null);
}
public AddMinusView(Context context,@Nullable AttributeSet attrs) {
this(context, attrs,0);
}
public AddMinusView(Context context,@Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
private void init(final Context context) {
View view = LayoutInflater.from(context).inflate(R.layout.addjian_item,this,true);
jia = findViewById(R.id.jia);
jian = findViewById(R.id.jian);
et_num = findViewById(R.id.et_num);
et_num.setText("1");
jian.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//num是int类型 转换成String类型
num = Integer.parseInt(et_num.getText().toString());
num--;
if (num == 0){
num = 1;
Toast.makeText(context,"不能再减了",Toast.LENGTH_SHORT).show();
return;
}
et_num.setText(num+"");
if (addMinusViewCallback != null){
addMinusViewCallback.numCallback(num);
}
addMinusViewCallback.numCallback(num);
}
});
jia.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
num = Integer.parseInt(et_num.getText().toString());
num++;
et_num.setText(num+"");
if (addMinusViewCallback != null){
addMinusViewCallback.numCallback(num);
}
addMinusViewCallback.numCallback(num);
}
});
}
private AddMinusCallback addMinusViewCallback;
public void setAddMinusViewCallback(AddMinusCallback addMinusViewCallback){
this.addMinusViewCallback = addMinusViewCallback;
}
public interface AddMinusCallback{
void numCallback(int num);
}
}
addjian_item(自定义加减器布局)
CartAdapter(一级列表适配器)
package com.example.shoppingcart.adapter;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;
import com.example.shoppingcart.MainActivity;
import com.example.shoppingcart.R;
import com.example.shoppingcart.callback.CartCallBack;
import com.example.shoppingcart.callback.CartUICallBack;
import com.example.shoppingcart.entity.DataBean;
import com.jcodecraeer.xrecyclerview.XRecyclerView;
import java.util.ArrayList;
import java.util.List;
public class CartAdapter extends RecyclerView.Adapter implements CartCallBack {
private CartUICallBack cartUICallBack;
private Context context;
private List list;
private ProductAdapter productAdapter;
public void setUICallBack(CartUICallBack cartUICallBack) {
this.cartUICallBack = cartUICallBack;
}
public CartAdapter(Context context) {
this.context = context;
this.list = new ArrayList<>();
}
//设置数据
public void setData(List list) {
this.list.clear();
if (list != null){
this.list.addAll(list);
}
notifyDataSetChanged();
}
//加载数据时调用
public void addData(List list) {
if (list != null){
this.list.addAll(list);
}
notifyDataSetChanged();
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = View.inflate(this.context, R.layout.shangjia_item, null);
MyViewHolder viewHolder = new MyViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull final MyViewHolder viewHolder, final int i){
viewHolder.ckbox.setChecked(list.get(i).isChecked);
viewHolder.tv_sj_name.setText(this.list.get(i).sellerName);
//创建商家商品是适配器
productAdapter = new ProductAdapter(context,list.get(i).list);
productAdapter.setCartCallBack(this);
//给商品设置布局管理器
viewHolder.xrecyclerview.setLayoutManager(new LinearLayoutManager(context));
viewHolder.xrecyclerview.setAdapter(productAdapter);
//一级商家复选框选中状态
viewHolder.ckbox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
list.get(i).isChecked = viewHolder.ckbox.isChecked();
for (DataBean.Cart.Product product : list.get(i).list) {
//点击父复选框 子复选框全部选中
product.isProductChecked = list.get(i).isChecked;
}
notifyDataSetChanged();
if (cartUICallBack != null){
cartUICallBack.notifyCart();
}
}
});
}
@Override
public int getItemCount() {
return this.list.size();
}
@Override
public void notifyCartItem(boolean isChecked, int postion) {
//设置以及复选框选中
list.get(postion+1).isChecked = isChecked;
notifyDataSetChanged();
}
@Override
public void notifyNum() {
//数据改变后通知价格联动改变
if (cartUICallBack != null){
cartUICallBack.notifyCart();
}
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private CheckBox ckbox;
private XRecyclerView xrecyclerview;
private TextView tv_sj_name;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
tv_sj_name = itemView.findViewById(R.id.tv_sj_name);
xrecyclerview = itemView.findViewById(R.id.xrecyclerview);
ckbox = itemView.findViewById(R.id.ckbox);
}
}
}
shangjia_item(商家一级列表布局)
CartCallBack(一级列表接口回调)
package com.example.shoppingcart.callback;
public interface CartCallBack {
void notifyCartItem(boolean isChecked ,int postion);
void notifyNum();
}
ProductAdapter(二级列表适配器)
package com.example.shoppingcart.adapter;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.example.shoppingcart.R;
import com.example.shoppingcart.callback.CartCallBack;
import com.example.shoppingcart.entity.DataBean;
import com.example.shoppingcart.widget.AddMinusView;
import com.jcodecraeer.xrecyclerview.XRecyclerView;
import java.util.List;
public class ProductAdapter extends XRecyclerView.Adapter {
private Context context;
private CartCallBack cartCallBack;
public void setCartCallBack(CartCallBack cartCallBack) {
this.cartCallBack = cartCallBack;
}
private List list_product;
public ProductAdapter(Context context, List list_product) {
this.context = context;
this.list_product = list_product;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = View.inflate(context, R.layout.product_item, null);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull final ViewHolder viewHolder, final int i) {
String[] image = list_product.get(i).images.split("\\|");
if (image != null && image.length>0){
Glide.with(context).load(image[0]).into(viewHolder.p_img);
}
viewHolder.p_tv_price.setText("￥"+list_product.get(i).price);
viewHolder.p_tv_title.setText(list_product.get(i).title);
viewHolder.p_checkb.setChecked(list_product.get(i).isProductChecked);
viewHolder.p_checkb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//点击子复选框 父复选框被选中
list_product.get(i).isProductChecked = viewHolder.p_checkb.isChecked();
cartCallBack.notifyNum();
for (DataBean.Cart.Product pu : list_product) {
if (!pu.isProductChecked){
if (cartCallBack != null){
cartCallBack.notifyCartItem(false,list_product.get(i).pos);
}
return;
}
cartCallBack.notifyCartItem(true,list_product.get(i).pos);
}
}
});
viewHolder.addminusView.setAddMinusViewCallback(new AddMinusView.AddMinusCallback() {
@Override
public void numCallback(int num) {
list_product.get(i).productNum = num;
cartCallBack.notifyNum();
}
});
}
@Override
public int getItemCount() {
return list_product.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private CheckBox p_checkb;
private ImageView p_img;
private TextView p_tv_title,p_tv_price;
private AddMinusView addminusView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
p_checkb = itemView.findViewById(R.id.p_checkb);
p_img = itemView.findViewById(R.id.p_img);
p_tv_title = itemView.findViewById(R.id.p_tv_title);
p_tv_price = itemView.findViewById(R.id.p_tv_price);
addminusView = itemView.findViewById(R.id.addminusView);
}
}
}
product_item(商家二级列表布局)
CartUICallBack(二级列表接口回调)
package com.example.shoppingcart.callback;
public interface CartUICallBack {
void notifyCart();
}
DataBean
package com.example.shoppingcart.entity;
import java.util.List;
public class DataBean {
public String code;
public String msg;
public List data;
public class Cart {
//一级列表是否选中标志位
public boolean isChecked;
public String sellerName;
public String sellerid;
public List list;
public class Product {
public boolean isProductChecked;//二级
public String title;
public String images;
public double price;
public String pid;
//下标
public int pos;
//商品数量
public int productNum =1;
}
}
}