这篇博客探讨了如何运用MVP（Model-View-Presenter）设计模式来实现一个购物车系统，主要关注购物车订单列表的创建和管理。通过Api类与后台交互，完成商品的添加、删除及更新操作。
public class PriceAndCount {
private double price;
private int count;
public PriceAndCount(double price, int count) {
this.price = price;
this.count = count;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
}不能忘了这两行，勾选用 private boolean checked;
private int count=1;net包
Api类
public interface Api {
boolean ISONLINE = true;
String DEV = "http://169.27.23.105";
public static String ONLINE = "http://120.27.23.105";
public static String HOST = ISONLINE ? ONLINE : DEV;
public static String Login = HOST + "/user/login";
public static String REGISTER = HOST + "/user/reg";
public static String CATAGORY = HOST + "/product/getCatagory";
public static String PRODUCT_CATAGORY = HOST + "/product/getProductCatagory?cid=%s";
public static String PRODUCT_CATAGORY_LIST = HOST + "/product/getProducts";
public static String PRODUCT_DETAIL = HOST + "/product/getProductDetail?pid=%s&source=android";
public static String ADD_CARD = HOST + "/product/addCart";
public static String SELECT_CARD = HOST + "/product/getCarts";
public static String DEL_CARD = HOST + "/product/deleteCart";
public static String str1 = "https://www.zhaoapi.cn/product/getProductDetail";
public static String str2 = "https://www.zhaoapi.cn/product/getCarts";
}Httputils类
public class HttpUtils {
private static HttpUtils httpUtils;
private final OkHttpClient client;
private HttpUtils(){
HttpLoggingInterceptor logging=new HttpLoggingInterceptor();
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
client=new OkHttpClient.Builder().addInterceptor(new MyInterceptor()).build();
}
public static HttpUtils getHttpUtils(){
if(httpUtils==null){
synchronized (HttpUtils.class){
if(httpUtils==null){
httpUtils=new HttpUtils();
}
}
}
return httpUtils;
}
/*
* GET请求*/
public void doGet(String url, Callback callback){
Request request=new Request.Builder().url(url).build();
client.newCall(request).enqueue(callback);
}
/**
* POST请求
*
* @param url
* @param params
* @param callback
*/
public void doPost(String url, Map<String, String> params, Callback callback) {
if (params == null) {
throw new RuntimeException("参数为空了");
}
FormBody.Builder builder = new FormBody.Builder();
for (Map.Entry<String, String> entry : params.entrySet()) {
builder.add(entry.getKey(), entry.getValue());
}
Log.e("OkHttpUtils", "请求地址：" + url + " 请求的参数：");
FormBody formBody = builder.build();
Request request = new Request.Builder().url(url).post(formBody).build();
client.newCall(request).enqueue(callback);
}
}拦截器
public class MyInterceptor implements Interceptor{
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
if (request.method().equals("GET")) {
String url = request.url().url().toString();
url += "&source=android";
Request newRequset = request.newBuilder().url(url).build();
return chain.proceed(newRequset);
} else {
FormBody formBody = (FormBody) request.body();
FormBody.Builder builder = new FormBody.Builder();
for (int i = 0; i < formBody.size(); i++) {
builder.add(formBody.name(i), formBody.value(i));
}
builder.add("source", "android");
FormBody newFormBody = builder.build();
Request newRequest = request.newBuilder().url(request.url().url().toString()).post(newFormBody).build();
return chain.proceed(newRequest);
}
}
}
public interface OnNetListener<T> {
public void onSuccess(T t);
public void onFaliure(Exception e);
}
ElvAdapter
public class ElvAdapter extends BaseExpandableListAdapter {
private Context context;
private List<GetCart.DataBean> group;
private List<List<GetCart.DataBean.ListBean>> child;
private final LayoutInflater inflater;
public ElvAdapter(Context context, List<GetCart.DataBean> group, List<List<GetCart.DataBean.ListBean>> child) {
this.context = context;
this.group = group;
this.child = child;
inflater = LayoutInflater.from(context);
}
@Override
public int getGroupCount() {
return group.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return child.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return group.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return child.get(groupPosition).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View view;
final GroupViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.elv_group, null);
holder = new GroupViewHolder();
holder.tv = view.findViewById(R.id.tvGroup);
holder.cbGroup = view.findViewById(R.id.cbGroup);
view.setTag(holder);
} else {
view = convertView;
holder = (GroupViewHolder) view.getTag();
}
final GetCart.DataBean dataBean = group.get(groupPosition);
holder.tv.setText(dataBean.getSellerName());
holder.cbGroup.setChecked(dataBean.isChecked());
holder.cbGroup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//需要改变三个checkbox的状态值
//1.一级列表的checkbox状态值
dataBean.setChecked(holder.cbGroup.isChecked());
//2.二级列表的checkbox状态值
setChildrenCb(groupPosition, holder.cbGroup.isChecked());
//3.全选的checkbox状态值
((SecondActivity) context).setAllChecked(isAllGroupCbChecked());
//计算钱和数量并显示
setPriceAndCount();
//刷新界面
notifyDataSetChanged();
}
});
return view;
}
@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, final View convertView, ViewGroup parent) {
View view;
final ChildViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.elv_child, null);
holder = new ChildViewHolder();
holder.iv = view.findViewById(R.id.iv);
holder.tvTitle = view.findViewById(R.id.tvTitle);
holder.tvSubhead = view.findViewById(R.id.tvSubhead);
holder.tvPrice = view.findViewById(R.id.tvPrice);
holder.cbChild = view.findViewById(R.id.cbChild);
holder.btDel = view.findViewById(R.id.btDel);
holder.tvNum = view.findViewById(R.id.tvNum);
holder.ivDel = view.findViewById(R.id.ivDel);
holder.ivAdd = view.findViewById(R.id.ivAdd);
view.setTag(holder);
} else {
view = convertView;
holder = (ChildViewHolder) view.getTag();
}
final GetCart.DataBean.ListBean listBean = child.get(groupPosition).get(childPosition);
String images = listBean.getImages();
Glide.with(context).load(images.split("\\|")[0]).into(holder.iv);
holder.tvTitle.setText(listBean.getTitle());
holder.cbChild.setChecked(child.get(groupPosition).get(childPosition).isChecked());
holder.tvSubhead.setText(listBean.getSubhead());
holder.tvPrice.setText(listBean.getPrice() + "元");
holder.tvNum.setText(listBean.getCount() + "");
//给checkbox设置点击事件
holder.cbChild.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//需要改变三个checkbox的状态值
//1.二级列表的checkbox状态值
listBean.setChecked(holder.cbChild.isChecked());
//2.一级列表的checkbox状态值
group.get(groupPosition).setChecked(isAllChildCbChecked(groupPosition));
//3.全选的checkbox状态值
((SecondActivity) context).setAllChecked(isAllGroupCbChecked());
//计算钱和数量并显示
setPriceAndCount();
//刷新界面
notifyDataSetChanged();
}
});
holder.ivAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//获取目前显示的值
int count = listBean.getCount();
count++;
//改变JavaBean里的状态值
listBean.setCount(count);
//计算钱和数量并显示
setPriceAndCount();
//刷新列表
notifyDataSetChanged();
}
});
holder.ivDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//获取目前显示的值
int count = listBean.getCount();
if (count <= 1) {
count = 1;
} else {
count--;
}
//改变JavaBean里的状态值
listBean.setCount(count);
//计算钱和数量并显示
setPriceAndCount();
//刷新列表
notifyDataSetChanged();
}
});
holder.btDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//其实就是删除集合
List<GetCart.DataBean.ListBean> listBeans = child.get(groupPosition);
if (listBeans.size() > 0) {
listBeans.remove(childPosition);
}
if (listBeans.size() == 0) {
child.remove(groupPosition);
group.remove(groupPosition);
}
//计算钱和数量并显示
setPriceAndCount();
//改变全选状态
((SecondActivity) context).setAllChecked(isAllGroupCbChecked());
//刷新列表
notifyDataSetChanged();
}
});
return view;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
class GroupViewHolder {
TextView tv;
CheckBox cbGroup;
}
class ChildViewHolder {
ImageView iv;
TextView tvTitle;
TextView tvSubhead;
TextView tvPrice;
CheckBox cbChild;
Button btDel;
TextView tvNum;
ImageView ivDel;
ImageView ivAdd;
}
/**
* 设置一级列表对应的二级列表checkbox状态
*
* @param groupPosition
* @param bool
*/
private void setChildrenCb(int groupPosition, boolean bool) {
List<GetCart.DataBean.ListBean> listBeans = child.get(groupPosition);
for (int i = 0; i < listBeans.size(); i++) {
listBeans.get(i).setChecked(bool);
}
}
/**
* 判断一级列表checkbox状态
*
* @return
*/
private boolean isAllGroupCbChecked() {
if (group.size() == 0) {
return false;
}
for (int i = 0; i < group.size(); i++) {
if (!group.get(i).isChecked()) {
return false;
}
}
return true;
}
/**
* 判断二级列表checkbox状态
*
* @return
*/
private boolean isAllChildCbChecked(int groupPosition) {
List<GetCart.DataBean.ListBean> listBeans = child.get(groupPosition);
for (int i = 0; i < listBeans.size(); i++) {
if (!listBeans.get(i).isChecked()) {
return false;
}
}
return true;
}
/**
* 设置钱和数量
*/
private void setPriceAndCount() {
((SecondActivity) context).setPriceAndCount(compute());
}
/**
* 计算钱和数量
*/
private PriceAndCount compute() {
double price = 0;
int count = 0;
for (int i = 0; i < group.size(); i++) {
List<GetCart.DataBean.ListBean> listBeans = child.get(i);
for (int j = 0; j < listBeans.size(); j++) {
if (listBeans.get(j).isChecked()) {
price += listBeans.get(j).getPrice() * listBeans.get(j).getCount();
count += listBeans.get(j).getCount();
}
}
}
return new PriceAndCount(price, count);
}
/**
* 全选或者全不选
*
* @param bool
*/
public void AllOrNone(boolean bool) {
for (int i = 0; i < group.size(); i++) {
group.get(i).setChecked(bool);
setChildrenCb(i, bool);
}
setPriceAndCount();
notifyDataSetChanged();
}
}
RvAllAdapter
public class RvAllAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private List<OrderBean.DataBean> list;
public RvAllAdapter(Context context, List<OrderBean.DataBean> list) {
this.context = context;
this.list = list;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.order_item, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
MyViewHolder myViewHolder = (MyViewHolder) holder;
OrderBean.DataBean dataBean = list.get(position);
myViewHolder.tvTitle.setText(dataBean.getTitle());
int status = dataBean.getStatus();
myViewHolder.tvBt.setText("查看订单");
myViewHolder.tvStatus.setTextColor(Color.parseColor("#000000"));
if (status == 0) {
myViewHolder.tvStatus.setText("待支付");
myViewHolder.tvBt.setText("取消订单");
myViewHolder.tvStatus.setTextColor(Color.parseColor("#ff0000"));
} else if (status == 1) {
myViewHolder.tvStatus.setText("已取消");
} else if (status == 2) {
myViewHolder.tvStatus.setText("已支付");
}
myViewHolder.tvPrice.setText("价格：" + dataBean.getPrice());
myViewHolder.tvPrice.setTextColor(Color.parseColor("#ff0000"));
myViewHolder.tvTime.setText(dataBean.getCreatetime());
}
@Override
public int getItemCount() {
return list.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
private final TextView tvTitle;
private final TextView tvStatus;
private final TextView tvPrice;
private final TextView tvTime;
private final TextView tvBt;
public MyViewHolder(View itemView) {
super(itemView);
tvTitle = itemView.findViewById(R.id.textView);
tvStatus = itemView.findViewById(R.id.textView2);
tvPrice = itemView.findViewById(R.id.textView3);
tvTime = itemView.findViewById(R.id.textView4);
tvBt = itemView.findViewById(R.id.textView5);
}
}
}public class AllFragment extends Fragment {
private RecyclerView rv;
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_all, null);
rv = view.findViewById(R.id.rv);
rv.setLayoutManager(new LinearLayoutManager(getActivity()));
String url = "https://www.zhaoapi.cn/product/getOrders?uid=71";
HttpUtils.getHttpUtils().doGet(url, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String string = response.body().string();
final OrderBean orderBean = new Gson().fromJson(string, OrderBean.class);
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
RvAllAdapter adapter = new RvAllAdapter(getContext(), orderBean.getData());public class ShangpinModel implements IShangpinModel {
private Handler handler=new Handler(Looper.getMainLooper());
//查看商品
@Override
public void doPost(Map<String, String> params, final OnNetListener<ShangpinBean> onNetListener) {
HttpUtils.getHttpUtils().doPost(Api.str1, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final ShangpinBean shangpinBean = new Gson().fromJson(response.body().string(), ShangpinBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(shangpinBean);
}
});
}
});
}
//加入购物车
@Override
public void doAdd(Map<String, String> params, final OnNetListener<AddCartBean> onNetListener) {
; HttpUtils.getHttpUtils().doPost(Api.str1, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final AddCartBean addCartBean = new Gson().fromJson(response.body().string(), AddCartBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(addCartBean);
}
});
}
});
}
//查询购物车
@Override
public void GetCart(Map<String, String> params, final OnNetListener<GetCart> onNetListener) {
HttpUtils.getHttpUtils().doPost(Api.str2, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final GetCart getCart = new Gson().fromJson(response.body().string(), GetCart.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(getCart);
}
});
}
});
}
}
rv.setAdapter(adapter); } }); } }); return view; }}
public class WaitFragment extends Fragment {
@Nullable
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return super.onCreateView(inflater, container, savedInstanceState);
}
}model层public interface IShangpinModel {
public void doPost(Map<String,String> params, OnNetListener<ShangpinBean> onNetListener);
public void doAdd(Map<String,String> params, OnNetListener<AddCartBean> onNetListener);
public void GetCart(Map<String,String> params, OnNetListener<GetCart> onNetListener);
}
public class ShangpinModel implements IShangpinModel {
private Handler handler=new Handler(Looper.getMainLooper());
//查看商品
@Override
public void doPost(Map<String, String> params, final OnNetListener<ShangpinBean> onNetListener) {
HttpUtils.getHttpUtils().doPost(Api.str1, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final ShangpinBean shangpinBean = new Gson().fromJson(response.body().string(), ShangpinBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(shangpinBean);
}
});
}
});
}
//加入购物车
@Override
public void doAdd(Map<String, String> params, final OnNetListener<AddCartBean> onNetListener) {
; HttpUtils.getHttpUtils().doPost(Api.str1, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final AddCartBean addCartBean = new Gson().fromJson(response.body().string(), AddCartBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(addCartBean);
}
});
}
});
}
//查询购物车
@Override
public void GetCart(Map<String, String> params, final OnNetListener<GetCart> onNetListener) {
HttpUtils.getHttpUtils().doPost(Api.str2, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final GetCart getCart = new Gson().fromJson(response.body().string(), GetCart.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(getCart);
}
});
}
});
}
}ptstener层public class ShangpinPrestener {
private IShangpinModel iShangpinModel;
private IShangpinView iShangpinView;
private ISecondListener iSecondListener;
public ShangpinPrestener(IShangpinView iShangpinView) {
this.iShangpinView = iShangpinView;
iShangpinModel=new ShangpinModel();
}
public ShangpinPrestener(ISecondListener iSecondListener) {
this.iSecondListener = iSecondListener;
iShangpinModel=new ShangpinModel();
}
//查看商品
public void doPost(){
Map<String,String> params=new HashMap<>();
params.put("pid","71");
iShangpinModel.doPost(params, new OnNetListener<ShangpinBean>() {
@Override
public void onSuccess(ShangpinBean shangpinBean) {
if (iShangpinView != null) {
iShangpinView.show(shangpinBean);
}
}
@Override
public void onFaliure(Exception e) {
}
});
}
//添加购物车
public void addCart(){
Map<String,String> params=new HashMap<>();
params.put("pid", "71");
params.put("uid", "70");
iShangpinModel.doAdd(params, new OnNetListener<AddCartBean>() {
@Override
public void onSuccess(AddCartBean addCartBean) {
if(iShangpinView!=null){
iShangpinView.addShwo(addCartBean.getCode().equals("0")?"添加成功":"添加失败了");
}
}
@Override
public void onFaliure(Exception e) {
}
});
}
//查看购物车
public void getCart(){
Map<String, String> params = new HashMap<>();
params.put("uid", "1234");
params.put("pid", "71");
iShangpinModel.GetCart(params, new OnNetListener<GetCart>() {
@Override
public void onSuccess(GetCart getCart) {
if (iSecondListener != null) {
List<GetCart.DataBean> group = getCart.getData();
List<List<GetCart.DataBean.ListBean>> child = new ArrayList<>();
for (int i = 0; i < group.size(); i++) {
child.add(group.get(i).getList());
}
iSecondListener.show(group, child);
}
}
@Override
public void onFaliure(Exception e) {
}
});
}
}
view层
public interface ISecondListener {
void show(List<GetCart.DataBean> group,List<List<GetCart.DataBean.ListBean>> child);
}
public interface IShangpinView {
void show(ShangpinBean shangpinBean);
void addShwo(String str);
}
Activity
public class ConfirmActivity extends AppCompatActivity implements View.OnClickListener {
private TextView mTvLeft;
/**
* 立即下单
*/
private Button mBt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_confirm);
//接收传过来实付款
Intent intent = getIntent();
String money = intent.getStringExtra("money");
initView();
mTvLeft.setText("实付款：¥" + money);
}
private void initView() {
mTvLeft = (TextView) findViewById(R.id.tvLeft);
mBt = (Button) findViewById(R.id.bt);
mBt.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
default:
break;
case R.id.bt:
//跳转到订单页面
Intent intent = new Intent(ConfirmActivity.this, OrderActivity.class);
startActivity(intent);
break;
}
}
}
public class MainActivity extends AppCompatActivity implements View.OnClickListener ,IShangpinView{
private ImageView mIv;
private TextView mTvBargainPrice;
private TextView mTvPrice;
/**
* 购物车
*/
private TextView mTvCart;
/**
* 加入购物车
*/
private TextView mTvAddCart;
private ShangpinPrestener shangpinPrestener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
shangpinPrestener=new ShangpinPrestener(this);
shangpinPrestener.doPost();
}
private void initView() {
mIv = (ImageView) findViewById(R.id.iv);
mIv.setOnClickListener(this);
mTvBargainPrice = (TextView) findViewById(R.id.tvBargainPrice);
mTvBargainPrice.setOnClickListener(this);
mTvPrice = (TextView) findViewById(R.id.tvPrice);
mTvPrice.setOnClickListener(this);
mTvCart = (TextView) findViewById(R.id.tvCart);
mTvCart.setOnClickListener(this);
mTvAddCart = (TextView) findViewById(R.id.tvAddCart);
mTvAddCart.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
default:
break;
case R.id.tvCart:
Intent intent=new Intent(MainActivity.this,SecondActivity.class);
startActivity(intent);
break;
case R.id.tvAddCart:
shangpinPrestener.addCart();
break;
}
}
@Override
public void show(ShangpinBean shangpinBean) {
String images = shangpinBean.getData().getImages();
String[] split = images.split("\\|");
Glide.with(this).load(split[0]).into(mIv);
mTvBargainPrice.setText("原价："+shangpinBean.getData().getPrice());
mTvPrice.setText("优惠价："+shangpinBean.getData().getBargainPrice());
}
@Override
public void addShwo(String str) {
Toast.makeText(this,str,Toast.LENGTH_SHORT).show();
}
}
public class OrderActivity extends AppCompatActivity {
/**
* 全部
*/
private TextView mTvAll;
/**
* 待支付
*/
private TextView mTvWait;
private LinearLayout mLl;
private ViewPager mVp;
private List<Fragment> list = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_order);
initView();
list.add(new AllFragment());
list.add(new WaitFragment());
mVp.setAdapter(new MyAdapter(getSupportFragmentManager()));
}
private void initView() {
mTvAll = (TextView) findViewById(R.id.tvAll);
mTvWait = (TextView) findViewById(R.id.tvWait);
mLl = (LinearLayout) findViewById(R.id.ll);
mVp = (ViewPager) findViewById(R.id.vp);
}
class MyAdapter extends FragmentPagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return list.get(position);
}
@Override
public int getCount() {
return list.size();
}
}
}
public class SecondActivity extends AppCompatActivity implements ISecondListener{
private ExpandableListView mElv;
/**
* 全选
*/
private CheckBox mCb;
/**
* 合计：
*/
private TextView mTvTotal;
/**
* 去结算(0)
*/
private TextView mTvCount;
private ShangpinPrestener shangpinPrestener;
private ElvAdapter elvAdapter;
private PriceAndCount priceAndCount;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
initView();
shangpinPrestener=new ShangpinPrestener(this);
shangpinPrestener.getCart();
mCb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
elvAdapter.AllOrNone(mCb.isChecked());
}
});
}
private void initView() {
mElv = (ExpandableListView) findViewById(R.id.elv);
mCb = (CheckBox) findViewById(R.id.cb);
mTvTotal = (TextView) findViewById(R.id.tvTotal);
mTvCount = (TextView) findViewById(R.id.tvCount);
mTvCount.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(SecondActivity.this,ConfirmActivity.class);
if(priceAndCount!=null){
intent.putExtra("money",priceAndCount.getPrice()+"");
}
startActivity(intent);
}
});
}
@Override
public void show(List<GetCart.DataBean> group, List<List<GetCart.DataBean.ListBean>> child) {
elvAdapter = new ElvAdapter(SecondActivity.this,group,child);
mElv.setGroupIndicator(null);
mElv.setAdapter(elvAdapter);
for (int i = 0; i < group.size(); i++) {
mElv.expandGroup(i);
}
} public void setPriceAndCount(PriceAndCount priceAndCount) {
this.priceAndCount = priceAndCount;
mTvTotal.setText("合计：" + priceAndCount.getPrice());
mTvCount.setText("去结算(" + priceAndCount.getCount() + ")");
}
public void setAllChecked(boolean bool) {
mCb.setChecked(bool);
}
}XMLconfrim<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_confirm"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="mvpframework .com.gouwuche.ConfirmActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#33000000">
<TextView
android:id="@+id/tvLeft"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/bt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#ff0000"
android:text="立即下单" />
</RelativeLayout>
</LinearLayout>
main<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="mvpframework. .com.gouwuche.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#ff3360"
android:text="商品详情"
android:gravity="center"
android:textColor="#ffffff"
android:textSize="25sp"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="400dp"
android:id="@+id/iv"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:id="@+id/tvBargainPrice"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFF1100C"
android:id="@+id/tvPrice"/>
<View
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="match_parent"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#33000000"
android:id="@+id/tvCart"
android:text="购物车"
android:gravity="center"/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:id="@+id/tvAddCart"
android:layout_weight="1"
android:background="#33000000"
android:gravity="center"
android:text="加入购物车"
/>
</LinearLayout>
</LinearLayout>
order<?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:id="@+id/activity_order"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="mvpframework .com.gouwuche.OrderActivity">
<LinearLayout
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/tvAll"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_weight="1"
android:gravity="center"
android:text="全部" />
<TextView
android:id="@+id/tvWait"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_weight="1"
android:gravity="center"
android:text="待支付" />
</LinearLayout>
<android.support.v4.view.ViewPager
android:id="@+id/vp"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v4.view.ViewPager>
</LinearLayout>
second<?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:id="@+id/activity_second"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
tools:context="mvpframework.com.gouwuche.SecondActivity">
<ExpandableListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/elv"
android:layout_weight="1"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="40dp">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/cb"
android:layout_centerVertical="true"
android:text="全选"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tvTotal"
android:layout_centerVertical="true"
android:layout_marginLeft="15dp"
android:layout_toRightOf="@id/cb"
android:text="合计："/>
<TextView
android:id="@+id/tvCount"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="#ff0000"
android:gravity="center"
android:text="去结算(0)"
android:textColor="#ffffff" />
</RelativeLayout>
</LinearLayout>
child<?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="120dp"
android:descendantFocusability="blocksDescendants"
android:gravity="center_vertical"
android:orientation="horizontal"
android:paddingLeft="50dp">
<CheckBox
android:id="@+id/cbChild"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="@+id/iv"
android:layout_width="100dp"
android:layout_height="100dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- <TextView
android:id="@+id/tvSubhead"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />-->
<TextView
android:id="@+id/tvSubhead"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<TextView
android:id="@+id/tvPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:layout_marginLeft="10dp"
android:id="@+id/ivDel"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/iv_del" />
<TextView
android:id="@+id/tvNum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25sp"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:text="1"/>
<ImageView
android:id="@+id/ivAdd"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/iv_add" />
</LinearLayout>
</LinearLayout>
<Button
android:id="@+id/btDel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="删除" />
</LinearLayout>group<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/cbGroup"/>
<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:id="@+id/tvGroup"
android:gravity="center_vertical"/>
</LinearLayout>fragment_all<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
</LinearLayout>order<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="19dp"
android:layout_marginStart="19dp"
android:layout_marginTop="21dp"
android:text="TextView" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginEnd="31dp"
android:layout_marginRight="31dp"
android:text="TextView" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView"
android:layout_alignStart="@+id/textView"
android:layout_below="@+id/textView"
android:layout_marginTop="27dp"
android:text="TextView" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="@+id/textView3"
android:layout_alignRight="@+id/textView3"
android:layout_below="@+id/textView3"
android:layout_marginTop="24dp"
android:text="TextView" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView4"
android:layout_alignEnd="@+id/textView2"
android:layout_alignRight="@+id/textView2"
android:text="TextView" />
</RelativeLayout>效果图
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