二级列表购物车okhttp(完整版)

1:首先导入依赖

compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'
compile 'com.google.code.gson:gson:2.8.2'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
compile 'org.greenrobot:eventbus:3.1.1'
compile 'com.github.bumptech.glide:glide:3.7.0'

2:清单列表

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

3:然后来看下具体结构吧




4bean层


4-1:cratBean是从网上获取的:接口是:https://www.zhaoapi.cn/product/getCarts?uid=3004

4-2countpricebean是用来写方法的:

public class CountPriceBean {
private double price;
private int count;

public CountPriceBean(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;
}
}

5net层
5-1:commonUtils

public class CommonUtils {
public static final String TAG = "Dash";//sp文件的xml名称
private static SharedPreferences sharedPreferences;

public static View inflate(int layoutId) {
View view = View.inflate(DashApplication.getAppContext(), layoutId, null);
return view;
}

public static int dip2px(int dip) {
//获取像素密度
float density = DashApplication.getAppContext().getResources().getDisplayMetrics().density;
//
int px = (int) (dip * density + 0.5f);//100.6
return px;

}

public static int px2dip(int px) {
//获取像素密度
float density = DashApplication.getAppContext().getResources().getDisplayMetrics().density;
//
int dip = (int) (px / density + 0.5f);
return dip;

}

/**
* 获取资源中的字符串
* @param stringId
* @return
*/
public static String getString(int stringId) {
return DashApplication.getAppContext().getResources().getString(stringId);
}

public static Drawable getDrawable(int did) {
return DashApplication.getAppContext().getResources().getDra
4000
wable(did);
}

public static int getDimens(int id) {
return DashApplication.getAppContext().getResources().getDimensionPixelSize(id);
}

/**
* sp存入字符串类型的值
* @param flag
* @param str
*/
public static void saveSp(String flag, String str) {
if (sharedPreferences == null) {
sharedPreferences = DashApplication.getAppContext().getSharedPreferences(TAG, DashApplication.getAppContext().MODE_PRIVATE);
}
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.putString(flag, str);
edit.commit();
}

public static String getSp(String flag) {
if (sharedPreferences == null) {
sharedPreferences = DashApplication.getAppContext().getSharedPreferences(TAG, DashApplication.getAppContext().MODE_PRIVATE);
}
return sharedPreferences.getString(flag, "");
}

public static boolean getBoolean(String tag) {
if (sharedPreferences == null) {
sharedPreferences = DashApplication.getAppContext().getSharedPreferences(TAG, DashApplication.getAppContext().MODE_PRIVATE);
}
return sharedPreferences.getBoolean(tag, false);
}

public static void putBoolean(String tag, boolean content) {
if (sharedPreferences == null) {
sharedPreferences = DashApplication.getAppContext().getSharedPreferences(TAG, DashApplication.getAppContext().MODE_PRIVATE);
}
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.putBoolean(tag, content);
edit.commit();
}

/**
* 清除sp数据
* @param tag
*/
public static void clearSp(String tag) {
if (sharedPreferences == null) {
sharedPreferences = DashApplication.getAppContext().getSharedPreferences(TAG, DashApplication.getAppContext().MODE_PRIVATE);
}
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.remove(tag);
edit.commit();
}

/**
* 自己写的运行在主线程的方法
* 如果是主线程,执行任务,否则使用handler发送到主线程中去执行
*
*
* @param runable
*/
public static void runOnUIThread(Runnable runable) {
//先判断当前属于子线程还是主线程
if (android.os.Process.myTid() == DashApplication.getMainThreadId()) {
runable.run();
} else {
//子线程
DashApplication.getAppHanler().post(runable);
}
}
}

5-2:okhttp3util:

public class OkHttp3Util {

private static OkHttpClient okHttpClient = null;

private OkHttp3Util() {
}

public static OkHttpClient getInstance() {
if (okHttpClient == null) {
//加同步安全
synchronized (OkHttp3Util.class) {
if (okHttpClient == null) {
//okhttp可以缓存数据....指定缓存路径
File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");
//指定缓存大小
int cacheSize = 10 * 1024 * 1024;

okHttpClient = new OkHttpClient.Builder()//构建器
.connectTimeout(15, TimeUnit.SECONDS)//连接超时
.writeTimeout(20, TimeUnit.SECONDS)//写入超时
.readTimeout(20, TimeUnit.SECONDS)//读取超时

.cache(new Cache(sdcache.getAbsoluteFile(), cacheSize))//设置缓存
.build();
}
}

}

return okHttpClient;
}

/**
* get请求
* 参数1 url
* 参数2 回调Callback
*/

public static void doGet(String oldUrl, Callback callback) {

//要添加的公共参数...map
Map<String,String> map = new HashMap<>();
map.put("source","android");

StringBuilder stringBuilder = new StringBuilder();//创建一个stringBuilder

stringBuilder.append(oldUrl);

if (oldUrl.contains("?")){
//?在最后面....2类型
if (oldUrl.indexOf("?") == oldUrl.length()-1){

}else {
//3类型...拼接上&
stringBuilder.append("&");
}
}else {
//不包含? 属于1类型,,,先拼接上?号
stringBuilder.append("?");
}

//添加公共参数....
for (Map.Entry<String,String> entry: map.entrySet()) {
//拼接
stringBuilder.append(entry.getKey())
.append("=")
.append(entry.getValue())
.append("&");
}

//删掉最后一个&符号
if (stringBuilder.indexOf("&") != -1){
stringBuilder.deleteCharAt(stringBuilder.lastIndexOf("&"));
}

String newUrl = stringBuilder.toString();//新的路径

//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();
//创建Request
Request request = new Re
227e8
quest.Builder().url(newUrl).build();
//得到Call对象
Call call = okHttpClient.newCall(request);
//执行异步请求
call.enqueue(callback);

}

public static void doPost(String url, Map<String, String> params, Callback callback) {
//要添加的公共参数...map
Map<String,String> map = new HashMap<>();
map.put("source","android");

//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();
//3.x版本post请求换成FormBody 封装键值对参数

FormBody.Builder builder = new FormBody.Builder();
//遍历集合
for (String key : params.keySet()) {
builder.add(key, params.get(key));

}

//添加公共参数
for (Map.Entry<String,String> entry: map.entrySet()) {
builder.add(entry.getKey(),entry.getValue());
}

//创建Request
Request request = new Request.Builder().url(url).post(builder.build()).build();

Call call = okHttpClient.newCall(request);
call.enqueue(callback);

}

public static void uploadFile(String url, File file, String fileName,Map<String,String> params) {
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getInstance();

MultipartBody.Builder builder = new MultipartBody.Builder();
builder.setType(MultipartBody.FORM);

//参数
if (params != null){
for (String key : params.keySet()){
builder.addFormDataPart(key,params.get(key));
}
}
//文件...参数name指的是请求路径中所接受的参数...如果路径接收参数键值是fileeeee,此处应该改变
builder.addFormDataPart("file",fileName,RequestBody.create(MediaType.parse("application/octet-stream"),file));

//构建
MultipartBody multipartBody = builder.build();

//创建Request
Request request = new Request.Builder().url(url).post(multipartBody).build();

//得到Call
Call call = okHttpClient.newCall(request);
//执行请求
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("upload",e.getLocalizedMessage());
}

@Override
public void onResponse(Call call, Response response) throws IOException {
//上传成功回调 目前不需要处理
if (response.isSuccessful()){
String s = response.body().string();
Log.e("upload","上传--"+s);
}
}
});

}

/**
* Post请求发送JSON数据....{"name":"zhangsan","pwd":"123456"}
* 参数一：请求Url
* 参数二：请求的JSON
* 参数三：请求回调
*/
public static void doPostJson(String url, String jsonParams, Callback callback) {
RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);
Request request = new Request.Builder().url(url).post(requestBody).build();
Call call = getInstance().newCall(request);
call.enqueue(callback);

}

/**
* 下载文件 以流的形式把apk写入的指定文件 得到file后进行安装
* 参数er：请求Url
* 参数san：保存文件的文件夹....download
*/
public static void download(final Activity context, final String url, final String saveDir) {
Request request = new Request.Builder().url(url).build();
Call call = getInstance().newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
//com.orhanobut.logger.Logger.e(e.getLocalizedMessage());
}

@Override
public void onResponse(Call call, final Response response) throws IOException {

InputStream is = null;
byte[] buf = new byte[2048];
int len = 0;
FileOutputStream fos = null;
try {
is = response.body().byteStream();//以字节流的形式拿回响应实体内容
//apk保存路径
final String fileDir = isExistDir(saveDir);
//文件
File file = new File(fileDir, getNameFromUrl(url));

fos = new FileOutputStream(file);
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
}

fos.flush();

context.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(context, "下载成功:" + fileDir + "," + getNameFromUrl(url), Toast.LENGTH_SHORT).show();
}
});

//apk下载完成后 调用系统的安装方法
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
context.startActivity(intent);

} catch (IOException e) {
e.printStackTrace();
} finally {
if (is != null) is.close();
if (fos != null) fos.close();

}
}
});

}

/**
* 判断下载目录是否存在......并返回绝对路径
*
* @param saveDir
* @return
* @throws IOException
*/
public static String isExistDir(String saveDir) throws IOException {
// 下载位置
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);
if (!downloadFile.mkdirs()) {
downloadFile.createNewFile();
}
String savePath = downloadFile.getAbsolutePath();
Log.e("savePath", savePath);
return savePath;
}
return null;
}

/**
* @param url
* @return 从下载连接中解析出文件名
*/
private static String getNameFromUrl(String url) {
return url.substring(url.lastIndexOf("/") + 1);
}

/**
* 公共参数拦截器
*/
private static class CommonParamsInterceptor implements Interceptor{

//拦截的方法
@Override
public Response intercept(Chain chain) throws IOException {

//获取到请求
Request request = chain.request();
//获取请求的方式
String method = request.method();
//获取请求的路径
String oldUrl = request.url().toString();

Log.e("---拦截器",request.url()+"---"+request.method()+"--"+request.header("User-agent"));

//要添加的公共参数...map
Map<String,String> map = new HashMap<>();
map.put("source","android");

if ("GET".equals(method)){
// 1.http://www.baoidu.com/login                --------？ key=value&key=value
// 2.http://www.baoidu.com/login?               --------- key=value&key=value
// 3.http://www.baoidu.com/login?mobile=11111    -----&key=value&key=value

StringBuilder stringBuilder = new StringBuilder();//创建一个stringBuilder

stringBuilder.append(oldUrl);

if (oldUrl.contains("?")){
//?在最后面....2类型
if (oldUrl.indexOf("?") == oldUrl.length()-1){

}else {
//3类型...拼接上&
stringBuilder.append("&");
}
}else {
//不包含? 属于1类型,,,先拼接上?号
stringBuilder.append("?");
}

//添加公共参数....
for (Map.Entry<String,String> entry: map.entrySet()) {
//拼接
stringBuilder.append(entry.getKey())
.append("=")
.append(entry.getValue())
.append("&");
}

//删掉最后一个&符号
if (stringBuilder.indexOf("&") != -1){
stringBuilder.deleteCharAt(stringBuilder.lastIndexOf("&"));
}

String newUrl = stringBuilder.toString();//新的路径

//拿着新的路径重新构建请求
request = request.newBuilder()
.url(newUrl)
.build();

}else if ("POST".equals(method)){
//先获取到老的请求的实体内容
RequestBody oldRequestBody = request.body();//....之前的请求参数,,,需要放到新的请求实体内容中去

//如果请求调用的是上面doPost方法
if (oldRequestBody instanceof FormBody){
FormBody oldBody = (FormBody) oldRequestBody;

//构建一个新的请求实体内容
FormBody.Builder builder = new FormBody.Builder();
//1.添加老的参数
for (int i=0;i<oldBody.size();i++){
builder.add(oldBody.name(i),oldBody.value(i));
}
//2.添加公共参数
for (Map.Entry<String,String> entry:map.entrySet()) {

builder.add(entry.getKey(),entry.getValue());
}

FormBody newBody = builder.build();//新的请求实体内容

//构建一个新的请求
request = request.newBuilder()
.url(oldUrl)
.post(newBody)
.build();
}

}

Response response = chain.proceed(request);

return response;
}
}
}

6:present层:
6-1:ICartPresenter

public interface ICartPresenter {
void getSuccessCartJson(String json);
}

6-2:cartPreaenter:

public class CartPresenter implements ICartPresenter{

private final CartModel cartModel;
private IMainActivity iMainActivity;

public CartPresenter(IMainActivity iMainActivity) {
this.iMainActivity = iMainActivity;
cartModel = new CartModel(this);
}

public void getCartData(String cartUrl) {
cartModel.getCartData(cartUrl);

}

@Override
public void getSuccessCartJson(String json) {
//回调给view
iMainActivity.getSuccessCartData(json);
}
}

7model层:


cartmodel:

public class CartModel {
private ICartPresenter iCartPresenter;

public CartModel(ICartPresenter iCartPresenter) {
this.iCartPresenter = iCartPresenter;
}

public void getCartData(final String cartUrl) {
//获取数据
OkHttp3Util.doGet(cartUrl, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e(cartUrl,e.getLocalizedMessage());
}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()){
final String json = response.body().string();

//返回数据到主线程
CommonUtils.runOnUIThread(new Runnable() {
@Override
public void run() {
iCartPresenter.getSuccessCartJson(json);
}
});

}
}
});

}
}

8:view层

:有5个:cartexpanablelistview,IMainactivity,myadapter,dashapplication,mainactivity

8-1:dashapplication:这个可以和myapp写在一起在清单列表里用name

public class DashApplication extends Application {

private static Context context;
private static Handler handler;
private static int mainId;
public static boolean isLoginSuccess;//是否已经登录的状态

@Override
public void onCreate() {
super.onCreate();

//关于context----http://blog.csdn.net/lmj623565791/article/details/40481055
context = getApplicationContext();
//初始化handler
handler = new Handler();
//主线程的id
mainId = Process.myTid();

}

/**
* 对外提供了context
* @return
*/
public static Context getAppContext() {
return context;
}

/**
* 得到全局的handler
* @return
*/
public static Handler getAppHanler() {
return handler;
}

/**
* 获取主线程id
* @return
*/
public static int getMainThreadId() {
return mainId;
}
}

8-2 :cartexpanablelistview

public class CartExpanableListview extends ExpandableListView {
public CartExpanableListview(Context context) {
super(context);
}

public CartExpanableListview(Context context, AttributeSet attrs) {
super(context, attrs);
}

public CartExpanableListview(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE>>2,MeasureSpec.AT_MOST);

super.onMeasure(widthMeasureSpec, height);
}
}

8-3:IMainactivity

public interface IMainActivity {
void getSuccessCartData(String json);
}

8-4:myadapter

public class MyAdapter extends BaseExpandableListAdapter{

private Handler handler;
private Context context;
private List<CartBean.DataBean> listGroup;
private List<List<CartBean.DataBean.ListBean>> listChilds;

public MyAdapter(Context context, List<CartBean.DataBean> listGroup, List<List<CartBean.DataBean.ListBean>> listChilds, Handler handler) {
this.context = context;
this.listGroup = listGroup;
this.listChilds = listChilds;
this.handler = handler;
}
@Override
public int getGroupCount() {
return listGroup.size();
}

@Override
public int getChildrenCount(int i) {
return listChilds.get(i).size();
}

@Override
public Object getGroup(int i) {
return listGroup.get(i);
}

@Override
public Object getChild(int i, int i1) {
return listChilds.get(i).get(i1);
}

@Override
public long getGroupId(int i) {
return i;
}

@Override
public long getChildId(int i, int i1) {
return i1;
}

@Override
public boolean hasStableIds() {
return true;
}

@Override
public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
GroupHolder holder;
if (view==null){
view = View.inflate(context, R.layout.group_item_layout, null);
holder=new GroupHolder();

holder.check_group=view.findViewById(R.id.check_group);
holder.text_group=view.findViewById(R.id.text_group);
view.setTag(holder);
}else{
holder= (GroupHolder) view.getTag();
}

final CartBean.DataBean dataBean=listGroup.get(i);
//赋值
holder.check_group.setChecked(dataBean.isGroupChecked());
holder.text_group.setText(dataBean.getSellerName());
//设置点击事件
holder.check_group.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//改变当前一级选中状态
dataBean.setGroupChecked(!dataBean.isGroupChecked());
//根据当前一级状态,改变改组里耳机列表的状态
changeChildState(i,dataBean.isGroupChecked());
//通过判断所有一级组是否选中,来决定是否全部选中
changeAllState(isAllGroupChecked());
//发送价格个数量
sendPriceAndCount();
//刷新适配器
notifyDataSetChanged();
}
});
return view;
}

/**
* 根据所有一级列表是否选中,确定外面的全选是否选中
* @param allGroupChecked
*/
private void changeAllState(boolean allGroupChecked) {
Message msg = Message.obtain();
msg.what =1;
msg.obj = allGroupChecked;
handler.sendMessage(msg);

}

/**
* 所有的一级列表是否选中
* @return
*/
private boolean isAllGroupChecked() {
for (int i=0;i<listGroup.size();i++){

if (! listGroup.get(i).isGroupChecked()){
return false;
}
}

return true;
}

/**
* 根据当前一级列表的状态,,,改变当前组中所有二级列表的状态
* @param groupPosition
* @param groupChecked
*/
private void changeChildState(int groupPosition, boolean groupChecked) {
List<CartBean.DataBean.ListBean> listBeans = listChilds.get(groupPosition);

for (int i=0;i<listBeans.size();i++){
listBeans.get(i).setSelected(groupChecked? 1:0);
}

}
@Override
public View getChildView(final int i, int i1, boolean b, View view, ViewGroup viewGroup) {
ChildHolder holder;
if (view==null){
view = View.inflate(context, R.layout.child_item_layout, null);
holder=new ChildHolder();
holder.text_add = view.findViewById(R.id.text_add);
holder.text_num = view.findViewById(R.id.text_num);
holder.text_jian = view.findViewById(R.id.text_jian);
holder.text_title = view.findViewById(R.id.text_title);
holder.text_price = view.findViewById(R.id.text_price);
holder.image_good = view.findViewById(R.id.image_good);
holder.check_child = view.findViewById(R.id.check_child);
view.setTag(holder);
}else{
holder= (ChildHolder) view.getTag();
}

final CartBean.DataBean.ListBean listBean=listChilds.get(i).get(i1);
holder.text_num.setText(listBean.getNum()+"");
holder.text_price.setText("$"+listBean.getPrice());
holder.text_title.setText(listBean.getTitle());
//设置checkbox为选中状态
holder.check_child.setChecked(listBean.getSelected()==0? false:true);
Glide.with(context).load(listBean.getImages().split("\\|")[0]).into(holder.image_good);

//设置点击事件
holder.check_child.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//点击改变当前子条目状态...实际是改变当前数据..刷新适配器
listBean.setSelected(listBean.getSellerid()==0? 1:0);
//发送价钱的数量给界面
sendPriceAndCount();
//判断当前子条目是否选中
if (listBean.getSelected()==1){
//判断一下当前组中所有的子条目是否全部选中
if (isAllChildSelected(i)){
//如果全部选中改变当前组状态
changeGroupState(i,true);
//确定是否改变全选
changeAllState(isAllGroupChecked());
}
}else {
//如果没有选中改变一下当前组的状态
changeGroupState(i,false);
//.确定是否改变全选
changeAllState(isAllGroupChecked());
}
notifyDataSetChanged();
}
});
//加号:
holder.text_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//改变当前位置 中商品的数量
listBean.setNum(listBean.getNum()+1);

//判断一下是否选中...计算价格数量
if (listBean.getSelected() == 1){
sendPriceAndCount();
}

//
notifyDataSetChanged();
}
});
//减号
holder.text_jian.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int num = listBean.getNum();

if (num == 1){
return;
}

listBean.setNum(num -1);

//判断是否选中
if (listBean.getSelected() == 1){
sendPriceAndCount();
}

notifyDataSetChanged();
}
});
return view;
}

/**
* 改变当前组的状态
* @param groupPosition
* @param b
*/
private void changeGroupState(int groupPosition, boolean b) {

listGroup.get(groupPosition).setGroupChecked(b);

}

/**
* 判断当前组中所有的二级是否选中
* @param groupPosition
* @return
*/
private boolean isAllChildSelected(int groupPosition) {
List<CartBean.DataBean.ListBean> listBeans = listChilds.get(groupPosition);

for (int i=0;i<listBeans.size();i++){
if (listBeans.get(i).getSelected() == 0){

return false;
}
}

return true;
}

@Override
public boolean isChildSelectable(int i, int i1) {
return true;//子条目是否可以点击
}

/**
* 设置是否全选
* @param checked
*/
public void setIfCheckAll(boolean checked) {

for (int i = 0;i<listGroup.size();i++){
CartBean.DataBean dataBean = listGroup.get(i);
//设置组上面的checkBox是否选中
dataBean.setGroupChecked(checked);

List<CartBean.DataBean.ListBean> listBeans = dataBean.getList();
for (int j = 0; j< listBeans.size(); j++){
//改变是否选中的状态...数据应该变的是
listBeans.get(j).setSelected(checked? 1:0);
}

}

//计算价钱和数量并且发送到mainActivity显示
sendPriceAndCount();

//刷新适配器
notifyDataSetChanged();

}
/**
* 计算总价和数量,,,发送显示
*/
private void sendPriceAndCount() {
double price = 0;
int count = 0;

for (int i=0;i<listGroup.size();i++){
List<CartBean.DataBean.ListBean> listBeans = listGroup.get(i).getList();
for (int j = 0;j<listBeans.size();j++){

CartBean.DataBean.ListBean listBean = listBeans.get(j);
if (listBean.getSelected()==1){

price += listBean.getPrice()* listBean.getNum();
count += listBean.getNum();

}
}
}

CountPriceBean countPriceBean = new CountPriceBean(price, count);
//显示到activity页面
Message msg = Message.obtain();
msg.what = 0;
msg.obj = countPriceBean;
handler.sendMessage(msg);

}
private class GroupHolder{
CheckBox check_group;
TextView text_group;
}

private class ChildHolder{
CheckBox check_child;
ImageView image_good;
TextView text_title;
TextView text_price;
TextView text_jian;
TextView text_num;
TextView text_add;
}
}

8-5:mainactivity

public class MainActivity extends AppCompatActivity implements IMainActivity,View.OnClickListener{
private CartExpanableListview expanableListview;
private String cartUrl = "https://www.zhaoapi.cn/product/getCarts?uid=3004";
private CartPresenter cartPresenter;
private Gson gson;
private MyAdapter myAdapter;
private CheckBox check_all;
private TextView text_total;
private TextView text_buy;

private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
if (msg.what == 0){
CountPriceBean countPriceBean = (CountPriceBean) msg.obj;

//设置
text_total.setText("合计:¥"+countPriceBean.getPrice());
text_buy.setText("去结算("+countPriceBean.getCount()+")");
}else  if (msg.what == 1){//改变全选
boolean flag = (boolean) msg.obj;

check_all.setChecked(flag);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

check_all = (CheckBox) findViewById(R.id.check_all);
text_total = (TextView) findViewById(R.id.text_total);
text_buy = (TextView) findViewById(R.id.text_buy);
expanableListview = (CartExpanableListview) findViewById(R.id.expanable_listview);
//去掉默认的指示器
expanableListview.setGroupIndicator(null);

cartPresenter = new CartPresenter(this);
gson = new Gson();

//全选:...点击事件
check_all.setOnClickListener(this);

}

@Override
protected void onResume() {
super.onResume();

//请求数据
cartPresenter.getCartData(cartUrl);

}

@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.check_all:
myAdapter.setIfCheckAll(check_all.isChecked());

break;
}
}

@Override
public void getSuccessCartData(String json) {
//解析数据
CartBean cartBean=gson.fromJson(json,CartBean.class);
//一个是一级标题的数据
List<CartBean.DataBean> listGroup =cartBean.getData();
//所有子条目的数据
List<List<CartBean.DataBean.ListBean>> listChilds = new ArrayList<>();
for (int i=0;i<listGroup.size();i++){
listChilds.add(listGroup.get(i).getList());
}
//设置适配器
myAdapter = new MyAdapter(MainActivity.this, listGroup, listChilds,handler);
expanableListview.setAdapter(myAdapter);

//展开所有
for (int i=0;i<listGroup.size();i++){
expanableListview.expandGroup(i);
}
}

}

------------------------------------------------
布局文件啦




activity_main:


相对布局

<ScrollView
android:layout_above="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<com.bwie.buycar.view.CartExpanableListview
android:id="@+id/expanable_listview"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</com.bwie.buycar.view.CartExpanableListview>

<LinearLayout
android:orientation="vertical"
android:background="#00ff00"
android:layout_width="match_parent"
android:layout_height="500dp">

</LinearLayout>
</LinearLayout>
</ScrollView>

<LinearLayout
android:id="@+id/linear_layout"
android:layout_alignParentBottom="true"
android:gravity="center_vertical"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="50dp">

<CheckBox
android:layout_marginLeft="10dp"
android:button="@null"
android:background="@drawable/check_box_selector"
android:id="@+id/check_all"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/text_total"
android:text="合计:¥0.00"
android:layout_weight="2"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<TextView
android:text="去结算(0)"
android:background="#ff0000"
android:textColor="#ffffff"
android:gravity="center"
android:id="@+id/text_buy"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent" />
</LinearLayout>

child_item_layout:


相对布局

<CheckBox
android:layout_centerVertical="true"
android:id="@+id/check_child"
android:button="@null"
android:background="@drawable/check_box_selector"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<ImageView
android:id="@+id/image_good"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/check_child"
android:layout_marginLeft="10dp"
android:layout_width="80dp"
android:layout_height="80dp" />

<TextView
android:id="@+id/text_title"
android:layout_toRightOf="@+id/image_good"
android:layout_marginLeft="10dp"
android:layout_alignTop="@+id/image_good"
android:maxLines="2"
android:minLines="2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/text_price"
android:layout_toRightOf="@+id/image_good"
android:layout_marginLeft="10dp"
android:layout_alignBottom="@+id/image_good"
android:text="¥99.99"
android:textColor="#ff0000"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<LinearLayout
android:layout_alignParentRight="true"
android:layout_alignBottom="@+id/image_good"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<TextView
android:id="@+id/text_jian"
android:text="一"
android:padding="5dp"
android:background="@drawable/bian_kuang_line"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:gravity="center"
android:id="@+id/text_num"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:background="@drawable/bian_kuang_line"
android:layout_width="wrap_content"
android:layout_height="match_parent" />

<TextView
android:id="@+id/text_add"
android:text="十"
android:padding="5dp"
android:background="@drawable/bian_kuang_line"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>

grop_item_layout:


线性布局

<CheckBox
android:button="@null"
android:background="@drawable/check_box_selector"
android:id="@+id/check_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:layout_marginLeft="10dp"
android:text="京东自营"
android:id="@+id/text_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />