MVP实现二级购物车

来源：互联网发布：淘宝店的货源哪里来编辑：程序博客网时间：2024/05/22 00:29

效果图

使用接口:http://120.27.23.105/product/getCarts?uid=100

导入依赖

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compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.google.code.gson:gson:2.8.2'
compile 'com.android.support:recyclerview-v7:25.3.1'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'

清单文件中加入权限

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<uses-permission android:name="android.permission.INTERNET"/>

配置application的name属性,ImageLoader初始化

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<application
android:name=".appli.App"
</application>

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public class App extends Application{
@Override
public void onCreate() {
super.onCreate();
ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this).build();
ImageLoader.getInstance().init(configuration);
}
}

布局中需要用到的的布局,在drawable下面新建qujiesuan.xml

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<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="200dp"/>
<solid android:color="#e53e42"/>
<size android:height="60dp" android:width="130dp"/>
</shape>

drawable下面还需要加入三张图片

接下来就是activity_main.xml里面的布局,上面是recyclerView下面是一系列的功能

activity_main.xml

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_View"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
/>
<LinearLayout
android:gravity="center_vertical"
android:padding="10dp"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckBox
android:background="@drawable/shopcart_unselected"
android:button="@null"
android:id="@+id/quanxuan"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:textStyle="bold"
android:layout_marginLeft="10dp"
android:textSize="23sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="全选"
/>
<LinearLayout
android:padding="10dp"
android:layout_marginLeft="10dp"
android:orientation="vertical"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content">
<TextView
android:textColor="#e53e42"
android:id="@+id/total_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="总价 : ¥0元"
/>
<TextView
android:id="@+id/total_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="共0件商品"
/>
</LinearLayout>
<TextView
android:gravity="center"
android:textSize="25sp"
android:text="去结算"
android:textColor="#fff"
android:background="@drawable/qujiesuan"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>

自定义组合控件,,

custom_jiajian.xml

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_height="wrap_content">
<Button
android:background="#fff"
android:textSize="20sp"
android:id="@+id/reverse"
android:text="一"
android:layout_width="50dp"
android:layout_height="wrap_content" />
<EditText
android:textStyle="bold"
android:textSize="23sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:id="@+id/count"
/>
<Button
android:id="@+id/add"
android:background="#fff"
android:textSize="25sp"
android:text="+"
android:layout_width="50dp"
android:layout_height="wrap_content" />
</LinearLayout>

适配器的条目的布局,recy_cart_item.xml

com.example.day20_mvp_cart.customView.CustomJiaJian 别忘了改成自己的包名下的,否则会报错

recy_cart_item.xml,需要引入自定义组合控件,在创建了CustomJiaJian类以后才可以引入

recy_cart_item.xml适配器的布局

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="vertical"
android:padding="15dp"
android:layout_height="match_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckBox
android:id="@+id/shop_checkbox"
android:layout_width="50dp"
android:layout_height="50dp" />
<TextView
android:layout_marginLeft="20dp"
android:text="良品铺子"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="23sp"
android:textStyle="bold"
android:id="@+id/shop_name"
/>
</LinearLayout>
<LinearLayout
android:gravity="center_vertical"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckBox
android:id="@+id/item_checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="@+id/item_face"
android:src="@mipmap/ic_launcher"
android:layout_width="120dp"
android:layout_height="120dp" />
<LinearLayout
android:layout_marginLeft="10dp"
android:orientation="vertical"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content">
<TextView
android:id="@+id/item_name"
android:textSize="20sp"
android:text="三只松鼠"
android:layout_width="wrap_content"
android:layout_weight="1"
android:layout_height="0dp"
/>
<TextView
android:textColor="#f00"
android:id="@+id/item_price"
android:textSize="23sp"
android:text="299"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
/>
<com.example.day171122_cart.customview.CustomJiaJian
android:id="@+id/custom_jiajian"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
/>
</LinearLayout>
<ImageView
android:id="@+id/item_delete"
android:layout_marginRight="10dp"
android:src="@drawable/shopcart_delete"
android:layout_width="30dp"
android:layout_height="30dp" />
</LinearLayout>
</LinearLayout>

接着写代码里面的,首先将自定义组合控件的类填充在视图里

自定义组合控件的类,CustomJiaJian.java继承LinearLayout,inflate填充布局,＋和-的点击事件回调给adapter

CustomJiaJian.java

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public class CustomJiaJian extends LinearLayout{
private Button reverse;
private Button add;
private EditText countEdit;
private int mCount =1;
public CustomJiaJian(Context context) {
super(context);
}
public CustomJiaJian(Context context, AttributeSet attrs) {
super(context, attrs);
View view = View.inflate(context, R.layout.custom_jiajian,this);
reverse = (Button) view.findViewById(R.id.reverse);
add = (Button) view.findViewById(R.id.add);
countEdit = (EditText) view.findViewById(R.id.count);
reverse.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String content = countEdit.getText().toString().trim();
int count = Integer.valueOf(content);
if(count>1){
mCount = count-1;
countEdit.setText(mCount+"");
//回调给adapter里面
if(customListener!=null){
customListener.jiajian(mCount);
}
}
}
});
add.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String content = countEdit.getText().toString().trim();
int count = Integer.valueOf(content)+1;
mCount = count;
countEdit.setText(mCount+"");
//接口回调给adapter
if(customListener!=null){
customListener.jiajian(mCount);
}
}
});
}
public CustomJiaJian(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
CustomListener customListener;
public void setCustomListener(CustomListener customListener){
this.customListener = customListener;
}
//加减的接口
public interface CustomListener{
public void jiajian(int count);
public void shuRuZhi(int count);
}
//这个方法是供recyadapter设置数量时候调用的
public void setEditText(int num) {
if(countEdit !=null) {
countEdit.setText(num + "");
}
}
}

下面就是okhttp二次封装的类,这里就不详细叙述了,详见okhttp封装类,拦截器地址

根据最上面给出的接口.访问到的数据,生成一个实体类CartBean

在CartBean类里面自己添加三个字段,isFirst,item_check,shop_check

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//自己添加的三个字段
private int isFirst = 1;//1为显示商铺, 2为隐藏商铺
private boolean item_check;//每个商品的选中状态
private boolean shop_check;//商店的选中状态
public int getIsFirst() {
return isFirst;
}
public void setIsFirst(int isFirst) {
this.isFirst = isFirst;
}
public boolean isItem_check() {
return item_check;
}
public void setItem_check(boolean item_check) {
this.item_check = item_check;
}
public boolean isShop_check() {
return shop_check;
}
public void setShop_check(boolean shop_check) {
this.shop_check = shop_check;
}

接下来就是使用MVP架构模式..首先创建presenter和model层,View这里默认就是MainActivity

写两个接口,一个是ModelCallBack是model层的回调接口,ViewCallBack是view层的回调接口

ModelCallBack.java

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public interface ModelCallBack {
public void success(CartBean cartBean);
public void failure(Exception e);
}

ViewCallBack.java

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public interface ViewCallBack {
public void success(CartBean cartBean);
public void failure(Exception e);
}

下面是重要的MainActivity.java, 调用presenter层的方法,实现view层的接口的方法,还调用适配器adapter里面的接口

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public class MainActivity extends AppCompatActivity implements ViewCallBack{
private RecyclerView recyclerView;
private TextView total_price;
private TextView total_num;
private CheckBox quanxuan;
private MyPresenter myPresenter;
private RecyAdapter recyAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//http://120.27.23.105/product/getCarts?uid=100
recyclerView = (RecyclerView) findViewById(R.id.recycler_View);
total_price = (TextView) findViewById(R.id.total_price);
total_num = (TextView) findViewById(R.id.total_num);
quanxuan = (CheckBox) findViewById(R.id.quanxuan);
quanxuan.setTag(1);//1为不选中
LinearLayoutManager manager = new LinearLayoutManager(MainActivity.this,LinearLayoutManager.VERTICAL,false);
//new出适配器
recyAdapter = new RecyAdapter(this);
myPresenter = new MyPresenter(this);
//调用presenter里面的请求数据的方法
myPresenter.getData();
recyclerView.setLayoutManager(manager);
recyclerView.setAdapter(recyAdapter);
//调用recyAdapter里面的接口,设置全选按钮总价总数量
recyAdapter.setUpdateListener(new RecyAdapter.UpdateListener() {
@Override
public void setTotal(String total, String num, boolean allCheck) {
//设置ui的改变
total_num.setText("共"+num+"件商品");//总数量
total_price.setText("总价 :¥"+total+"元");//总价
if(allCheck){
quanxuan.setTag(2);
quanxuan.setBackgroundResource(R.drawable.shopcart_selected);
}else{
quanxuan.setTag(1);
quanxuan.setBackgroundResource(R.drawable.shopcart_unselected);
}
quanxuan.setChecked(allCheck);
}
});
//这里只做ui更改, 点击全选按钮,,调到adapter里面操作
quanxuan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//调用adapter里面的方法 ,,把当前quanxuan状态传递过去
int tag = (int) quanxuan.getTag();
if(tag==1){
quanxuan.setTag(2);
quanxuan.setBackgroundResource(R.drawable.shopcart_selected);
}else{
quanxuan.setTag(1);
quanxuan.setBackgroundResource(R.drawable.shopcart_unselected);
}
recyAdapter.quanXuan(quanxuan.isChecked());
}
});
}
//实现接口,重写的方法
@Override
public void success(CartBean cartBean) {
//拿到返回来的数据 ,, 传给适配器数据
recyAdapter.add(cartBean);
}
@Override
public void failure(final Exception e) {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this,"error",Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
//调用p层的解除绑定
myPresenter.detach();
}
}

MyPresenter.java,presenter层里面调用model层的方法,,防止内存泄露解绑

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public class MyPresenter {
MyModel myModel = new MyModel();
ViewCallBack viewCallBack;
public MyPresenter(ViewCallBack viewCallBack) {
this.viewCallBack = viewCallBack;
}
//调用model 层的请求数据
public void getData(){
myModel.getData(new ModelCallBack() {
@Override
public void success(CartBean cartBean) {
if(viewCallBack!=null) {
viewCallBack.success(cartBean);
}
}
@Override
public void failure(Exception e) {
if(viewCallBack!=null) {
viewCallBack.failure(e);
}
}
});
}
/**
* 防止内存泄露
* */
public void detach(){
viewCallBack=null;
}
}

MyModel.java,model层里面调用okhttp的封装类单例模式,请求网络数据.返回一个bean类,类型改成CartBean

上面已经放过了MainActivity接收到model传给presenter.presenter传给view 的CartBean以后,将数据添加给适配器,

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public class MyModel {
public void getData(final ModelCallBack modelCallBack){
//访问接口
String path = "http://120.27.23.105/product/getCarts?uid=100";
OkhttpUtils.getInstance().asy(null, path, new AbstractUiCallBack<CartBean>() {
@Override
public void success(CartBean cartBean) {
modelCallBack.success(cartBean);
}
@Override
public void fail(Exception e) {
modelCallBack.failure(e);
}
});
}
}

下面是适配器RecyAdapter.java 这里面的操作量就很大,包括了对每个条目的一系列操作,删除,选中,和对自定义视图加减号改变数量等,和是否显示和隐藏一级商家的信息,求总价,总数量等,部分操作也用到了接口回调出去

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public class RecyAdapter extends RecyclerView.Adapter<RecyAdapter.MyViewHolder>{
Context context;
//创建大的集合
private List<CartBean.DataBean.ListBean> list;
//存放商家的id和商家的名称的map集合
private Map<String,String> map = new HashMap<>();
public RecyAdapter(Context context) {
this.context = context;
}
/**
* 添加数据并更新显示
* */
public void add(CartBean cartBean){
//传进来的是bean对象
if(list == null){
list = new ArrayList<>();
}
//第一层遍历商家和商品
for (CartBean.DataBean shop : cartBean.getData()){
//把商品的id和商品的名称添加到map集合里 ,,为了之后方便调用
map.put(shop.getSellerid(),shop.getSellerName());
//第二层遍历里面的商品
for (int i=0;i<shop.getList().size();i++){
//添加到list集合里
list.add(shop.getList().get(i));
}
}
//调用方法设置显示或隐藏商铺名
setFirst(list);
notifyDataSetChanged();
}
/**
* 设置数据源,控制是否显示商家
* */
private void setFirst(List<CartBean.DataBean.ListBean> list) {
if(list.size()>0){
//如果是第一条数据就设置isFirst为1
list.get(0).setIsFirst(1);
//从第二条开始遍历
for (int i=1;i<list.size();i++){
//如果和前一个商品是同一家商店的
if (list.get(i).getSellerid() == list.get(i-1).getSellerid()){
//设置成2不显示商铺
list.get(i).setIsFirst(2);
}else{//设置成1显示商铺
list.get(i).setIsFirst(1);
//如果当前条目选中,把当前的商铺也选中
if (list.get(i).isItem_check()==true){
list.get(i).setShop_check(list.get(i).isItem_check());
}
}
}
}
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = View.inflate(context, R.layout.recy_cart_item,null);
MyViewHolder myViewHolder = new MyViewHolder(view);
return myViewHolder;
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
/**
* 设置商铺的 shop_checkbox和商铺的名字显示或隐藏
* */
if(list.get(position).getIsFirst()==1){
//显示商家
holder.shop_checkbox.setVisibility(View.VISIBLE);
holder.shop_name.setVisibility(View.VISIBLE);
//设置shop_checkbox的选中状态
holder.shop_checkbox.setChecked(list.get(position).isShop_check());
holder.shop_name.setText(map.get(String.valueOf(list.get(position).getSellerid())));
}else{//2
//隐藏商家
holder.shop_name.setVisibility(View.GONE);
holder.shop_checkbox.setVisibility(View.GONE);
}
//拆分images字段
String[] split = list.get(position).getImages().split("\\|");
//设置商品的图片
ImageLoader.getInstance().displayImage(split[0],holder.item_face);
//控制商品的item_checkbox,,根据字段改变
holder.item_checkbox.setChecked(list.get(position).isItem_check());
holder.item_name.setText(list.get(position).getTitle());
holder.item_price.setText(list.get(position).getPrice()+"");
//调用customjiajian里面的方法设置加减号中间的数字
holder.customJiaJian.setEditText(list.get(position).getNum());
//商铺的shop_checkbox点击事件 ,控制商品的item_checkbox
holder.shop_checkbox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//先改变数据源中的shop_check
list.get(position).setShop_check(holder.shop_checkbox.isChecked());
for (int i=0;i<list.size();i++){
//如果是同一家商铺的都给成相同状态
if(list.get(position).getSellerid()==list.get(i).getSellerid()){
//当前条目的选中状态设置成当前商铺的选中状态
list.get(i).setItem_check(holder.shop_checkbox.isChecked());
}
}
//刷新适配器
notifyDataSetChanged();
//调用求和的方法
sum(list);
}
});
//商品的item_checkbox点击事件,控制商铺的shop_checkbox
holder.item_checkbox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//先改变数据源中的item_checkbox
list.get(position).setItem_check(holder.item_checkbox.isChecked());
//反向控制商铺的shop_checkbox
for (int i=0;i<list.size();i++){
for (int j=0;j<list.size();j++){
//如果两个商品是同一家店铺的并且这两个商品的item_checkbox选中状态不一样
if(list.get(i).getSellerid()==list.get(j).getSellerid() && !list.get(j).isItem_check()){
//就把商铺的shop_checkbox改成false
list.get(i).setShop_check(false);
break;
}else{
//同一家商铺的商品选中状态都一样,就把商铺shop_checkbox状态改成true
list.get(i).setShop_check(true);
}
}
}
//更新适配器
notifyDataSetChanged();
//调用求和的方法
sum(list);
}
});
//删除条目的点击事件
holder.item_delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
list.remove(position);//移除集合中的当前数据
//删除完当前的条目重新判断商铺的显示隐藏
setFirst(list);
//调用重新求和
sum(list);
notifyDataSetChanged();
}
});
//加减号的监听,
holder.customJiaJian.setCustomListener(new CustomJiaJian.CustomListener() {
@Override
public void jiajian(int count) {
//改变数据源中的数量
list.get(position).setNum(count);
notifyDataSetChanged();
sum(list);
}
@Override
//输入值求总价
public void shuRuZhi(int count) {
list.get(position).setNum(count);
notifyDataSetChanged();
sum(list);
}
});
}
/**
* 计算总价的方法
* */
private void sum(List<CartBean.DataBean.ListBean> list){
int totalNum = 0;//初始的总价为0
float totalMoney = 0.0f;
boolean allCheck = true;
for (int i=0;i<list.size();i++){
//把已经选中的条目计算价格
if (list.get(i).isItem_check()){
totalNum += list.get(i).getNum();
totalMoney += list.get(i).getNum() * list.get(i).getPrice();
}else{
//如果有个未选中,就标记为false
allCheck = false;
}
}
//接口回调出去把总价总数量和allcheck 传给view层
updateListener.setTotal(totalMoney+"",totalNum+"",allCheck);
}
//view层调用这个方法, 点击quanxuan按钮的操作
public void quanXuan(boolean checked) {
for (int i=0;i<list.size();i++){
list.get(i).setShop_check(checked);
list.get(i).setItem_check(checked);
}
notifyDataSetChanged();
sum(list);
}
@Override
public int getItemCount() {
return list==null?0:list.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
private final CheckBox shop_checkbox;
private final TextView shop_name;
private final CheckBox item_checkbox;
private final TextView item_name;
private final TextView item_price;
private final CustomJiaJian customJiaJian;
private final ImageView item_delete;
private final ImageView item_face;
public MyViewHolder(View itemView) {
super(itemView);
shop_checkbox = (CheckBox) itemView.findViewById(R.id.shop_checkbox);
shop_name = (TextView) itemView.findViewById(R.id.shop_name);
item_checkbox = (CheckBox) itemView.findViewById(R.id.item_checkbox);
item_name = (TextView) itemView.findViewById(R.id.item_name);
item_price = (TextView) itemView.findViewById(R.id.item_price);
customJiaJian = (CustomJiaJian) itemView.findViewById(R.id.custom_jiajian);
item_delete = (ImageView) itemView.findViewById(R.id.item_delete);
item_face = (ImageView) itemView.findViewById(R.id.item_face);
}
}
UpdateListener updateListener;
public void setUpdateListener(UpdateListener updateListener){
this.updateListener = updateListener;
}
//接口
public interface UpdateListener{
public void setTotal(String total,String num,boolean allCheck);
}
}

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