详解Android OkHttp完全解析

一、概述

最近在群里听到各种讨论okhttp的话题，可见okhttp的口碑相当好了。再加上google貌似在6.0版本里面删除了httpclient相关api，对于这个行为不做评价。为了更好的在应对网络访问，学习下okhttp还是蛮必要的，本篇博客首先介绍okhttp的简单使用，主要包含：

• 一般的get请求
• 一般的post请求
• 基于http的文件上传
• 文件下载
• 加载图片
• 支持请求回调，直接返回对象、对象集合
• 支持session的保持

最后会对上述几个功能进行封装，完整的封装类的地址见：

使用前，对于android studio的用户，可以选择添加:
compile 'com.squareup.okhttp:okhttp:2.4.0'
或者eclipse的用户，可以下载最新的jarokhttp he latest jar ，添加依赖就可以用了。

注意:okhttp内部依赖okio，别忘了同时导入okio：

gradle: compile 'com.squareup.okio:okio:1.5.0'

最新的jar地址：okio the latest jar

二、使用教程

（一）http get

对了网络加载库，那么最常见的肯定就是http get请求了，比如获取一个网页的内容。

//创建okhttpclient对象
okhttpclient mokhttpclient = new okhttpclient();
//创建一个request
final request request = new request.builder()
    .url("https://github.com/hongyangandroid")
    .build();
//new call
call call = mokhttpclient.newcall(request); 
//请求加入调度
call.enqueue(new callback()
  {
   @override
   public void onfailure(request request, ioexception e)
   {
   }

   @override
   public void onresponse(final response response) throws ioexception
   {
     //string htmlstr = response.body().string();
   }
  });   

1.以上就是发送一个get请求的步骤，首先构造一个request对象，参数最起码有个url，当然你可以通过request.builder设置更多的参数比如：header、method等。

2.然后通过request的对象去构造得到一个call对象，类似于将你的请求封装成了任务，既然是任务，就会有execute()和cancel()等方法。

3.最后，我们希望以异步的方式去执行请求，所以我们调用的是call.enqueue，将call加入调度队列，然后等待任务执行完成，我们在callback中即可得到结果。

看到这，你会发现，整体的写法还是比较长的，所以封装肯定是要做的，不然每个请求这么写，得累死。

ok，需要注意几点：

1、onresponse回调的参数是response，一般情况下，比如我们希望获得返回的字符串，可以通过response.body().string()获取；如果希望获得返回的二进制字节数组，则调用response.body().bytes()；如果你想拿到返回的inputstream，则调用response.body().bytestream()

看到这，你可能会奇怪，竟然还能拿到返回的inputstream，看到这个最起码能意识到一点，这里支持大文件下载，有inputstream我们就可以通过io的方式写文件。不过也说明一个问题，这个onresponse执行的线程并不是ui线程。的确是的，如果你希望操作控件，还是需要使用handler等，例如：

@override
public void onresponse(final response response) throws ioexception
{
  final string res = response.body().string();
  runonuithread(new runnable()
  {
   @override
   public void run()
   {
   mtv.settext(res);
   }

  });
}

2、我们这里是异步的方式去执行，当然也支持阻塞的方式，上面我们也说了call有一个execute()方法，你也可以直接调用call.execute()通过返回一个response。

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(二) http post 携带参数

看来上面的简单的get请求，基本上整个的用法也就掌握了，比如post携带参数，也仅仅是request的构造的不同。

request request = buildmultipartformrequest(
  url, new file[]{file}, new string[]{filekey}, null);
formencodingbuilder builder = new formencodingbuilder(); 
builder.add("username","张鸿洋");

request request = new request.builder()
     .url(url)
    .post(builder.build())
    .build();
 mokhttpclient.newcall(request).enqueue(new callback(){});

大家都清楚，post的时候，参数是包含在请求体中的；所以我们通过formencodingbuilder。添加多个string键值对，然后去构造requestbody，最后完成我们request的构造。

后面的就和上面一样了。

--------------------------------------------------------------------------------

（三）基于http的文件上传

接下来我们在介绍一个可以构造requestbody的builder，叫做multipartbuilder。当我们需要做类似于表单上传的时候，就可以使用它来构造我们的requestbody。

file file = new file(environment.getexternalstoragedirectory(), "balabala.mp4");

requestbody filebody = requestbody.create(mediatype.parse("application/octet-stream"), file);

requestbody requestbody = new multipartbuilder()
  .type(multipartbuilder.form)
  .addpart(headers.of(
   "content-disposition", 
    "form-data; name=\"username\""), 
   requestbody.create(null, "张鸿洋"))
  .addpart(headers.of(
   "content-disposition", 
   "form-data; name=\"mfile\"; 
   filename=\"wjd.mp4\""), filebody)
  .build();

request request = new request.builder()
 .url("http://192.168.1.103:8080/okhttpserver/fileupload")
 .post(requestbody)
 .build();

call call = mokhttpclient.newcall(request);
call.enqueue(new callback()
{
 //...
});

上述代码向服务器传递了一个键值对username:张鸿洋和一个文件。我们通过multipartbuilder的addpart方法可以添加键值对或者文件。

其实类似于我们拼接模拟浏览器行为的方式，如果你对这块不了解，可以参考：从原理角度解析android （java） http 文件上传

ok，对于我们最开始的目录还剩下图片下载，文件下载；这两个一个是通过回调的response拿到byte[]然后decode成图片；文件下载，就是拿到inputstream做写文件操作，我们这里就不赘述了。

接下来我们主要看如何封装上述的代码。

--------------------------------------------------------------------------------

三、封装

由于按照上述的代码，写多个请求肯定包含大量的重复代码，所以我希望封装后的代码调用是这样的：

（一）使用

1.一般的get请求

okhttpclientmanager.getasyn("https://www.baidu.com", new okhttpclientmanager.resultcallback<string>()
  {
   @override
   public void onerror(request request, exception e)
   {
    e.printstacktrace();
   }

   @override
   public void onresponse(string u)
   {
    mtv.settext(u);//注意这里是ui线程
   }
  });

对于一般的请求，我们希望给个url，然后callback里面直接操作控件。

2.文件上传且携带参数

我们希望提供一个方法，传入url,params,file,callback即可。

 okhttpclientmanager.postasyn("http://192.168.1.103:8080/okhttpserver/fileupload",//
 new okhttpclientmanager.resultcallback<string>()
 {
  @override
  public void onerror(request request, ioexception e)
  {
   e.printstacktrace();
  }

  @override
  public void onresponse(string result)
  {

  }
 },//
 file,//
 "mfile",//
 new okhttpclientmanager.param[]{
   new okhttpclientmanager.param("username", "zhy"),
   new okhttpclientmanager.param("password", "123")}
  );

键值对没什么说的，参数3为file，参数4为file对应的name，这个name不是文件的名字；
 对应于http中的

<input type="file" name="mfile" > 

对应的是name后面的值，即mfile.

3.文件下载

对于文件下载，提供url，目标dir，callback即可。

okhttpclientmanager.downloadasyn(
 "http://192.168.1.103:8080/okhttpserver/files/messenger_01.png", 
 environment.getexternalstoragedirectory().getabsolutepath(), 
new okhttpclientmanager.resultcallback<string>()
 {
  @override
  public void onerror(request request, ioexception e)
  {

  }

  @override
  public void onresponse(string response)
  {
   //文件下载成功，这里回调的reponse为文件的absolutepath
  }
});

4.展示图片

展示图片，我们希望提供一个url和一个imageview，如果下载成功，直接帮我们设置上即可。

okhttpclientmanager.displayimage(mimageview, 
  http://images.csdn.net/20150817/1.jpg);

内部会自动根据imageview的大小自动对图片进行合适的压缩。虽然，这里可能不适合一次性加载大量图片的场景，但是对于app中偶尔有几个图片的加载，还是可用的。

四、整合json

很多人提出项目中使用时，服务端返回的是json字符串，希望客户端回调可以直接拿到对象，于是整合进入了json，完善该功能。

（一）直接回调对象

例如现在有个user实体类：

package com.zhy.utils.http.okhttp;

public class user {

 public string username ; 
 public string password ;

 public user() {
  // todo auto-generated constructor stub
 }

 public user(string username, string password) {
  this.username = username;
  this.password = password;
 }

 @override
 public string tostring()
 {
  return "user{" +
    "username='" + username + '\'' +
    ", password='" + password + '\'' +
    '}';
 }
}

服务端返回：

{"username":"zhy","password":"123"}

客户端可以如下方式调用：

 okhttpclientmanager.getasyn("http://192.168.56.1:8080/okhttpserver/user!getuser",
new okhttpclientmanager.resultcallback<user>()
{
 @override
 public void onerror(request request, exception e)
 {
  e.printstacktrace();
 }

 @override
 public void onresponse(user user)
 {
  mtv.settext(u.tostring());//ui线程
 }
});

我们传入泛型user，在onresponse里面直接回调user对象。 

 这里特别要注意的事，如果在json字符串->实体对象过程中发生错误，程序不会崩溃，onerror方法会被回调。

注意：这里做了少许的更新，接口命名从stringcallback修改为resultcallback。接口中的onfailure方法修改为onerror。

(二) 回调对象集合

依然是上述的user类，服务端返回

[{"username":"zhy","password":"123"},{"username":"lmj","password":"12345"}]

则客户端可以如下调用：

okhttpclientmanager.getasyn("http://192.168.56.1:8080/okhttpserver/user!getusers",
new okhttpclientmanager.resultcallback<list<user>>()
{
 @override
 public void onerror(request request, exception e)
 {
  e.printstacktrace();
 }
 @override
 public void onresponse(list<user> us)
 {
  log.e("tag", us.size() + "");
  mtv.settext(us.get(1).tostring());
 }
});

唯一的区别，就是泛型变为list<user> ，ok ， 如果发现bug或者有任何意见欢迎留言。

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源码

ok，基本介绍完了，对于封装的代码其实也很简单，我就直接贴出来了，因为也没什么好介绍的，如果你看完上面的用法，肯定可以看懂：

package com.zhy.utils.http.okhttp;

import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.os.handler;
import android.os.looper;
import android.widget.imageview;

import com.google.gson.gson;
import com.google.gson.internal.$gson$types;
import com.squareup.okhttp.call;
import com.squareup.okhttp.callback;
import com.squareup.okhttp.formencodingbuilder;
import com.squareup.okhttp.headers;
import com.squareup.okhttp.mediatype;
import com.squareup.okhttp.multipartbuilder;
import com.squareup.okhttp.okhttpclient;
import com.squareup.okhttp.request;
import com.squareup.okhttp.requestbody;
import com.squareup.okhttp.response;

import java.io.file;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.inputstream;
import java.lang.reflect.parameterizedtype;
import java.lang.reflect.type;
import java.net.cookiemanager;
import java.net.cookiepolicy;
import java.net.filenamemap;
import java.net.urlconnection;
import java.util.hashmap;
import java.util.map;
import java.util.set;

/**
 * created by zhy on 15/8/17.
 */
public class okhttpclientmanager
{
 private static okhttpclientmanager minstance;
 private okhttpclient mokhttpclient;
 private handler mdelivery;
 private gson mgson;


 private static final string tag = "okhttpclientmanager";

 private okhttpclientmanager()
 {
  mokhttpclient = new okhttpclient();
  //cookie enabled
  mokhttpclient.setcookiehandler(new cookiemanager(null, cookiepolicy.accept_original_server));
  mdelivery = new handler(looper.getmainlooper());
  mgson = new gson();
 }

 public static okhttpclientmanager getinstance()
 {
  if (minstance == null)
  {
   synchronized (okhttpclientmanager.class)
   {
    if (minstance == null)
    {
     minstance = new okhttpclientmanager();
    }
   }
  }
  return minstance;
 }

 /**
  * 同步的get请求
  *
  * @param url
  * @return response
  */
 private response _getasyn(string url) throws ioexception
 {
  final request request = new request.builder()
    .url(url)
    .build();
  call call = mokhttpclient.newcall(request);
  response execute = call.execute();
  return execute;
 }

 /**
  * 同步的get请求
  *
  * @param url
  * @return 字符串
  */
 private string _getasstring(string url) throws ioexception
 {
  response execute = _getasyn(url);
  return execute.body().string();
 }


 /**
  * 异步的get请求
  *
  * @param url
  * @param callback
  */
 private void _getasyn(string url, final resultcallback callback)
 {
  final request request = new request.builder()
    .url(url)
    .build();
  deliveryresult(callback, request);
 }


 /**
  * 同步的post请求
  *
  * @param url
  * @param params post的参数
  * @return
  */
 private response _post(string url, param... params) throws ioexception
 {
  request request = buildpostrequest(url, params);
  response response = mokhttpclient.newcall(request).execute();
  return response;
 }


 /**
  * 同步的post请求
  *
  * @param url
  * @param params post的参数
  * @return 字符串
  */
 private string _postasstring(string url, param... params) throws ioexception
 {
  response response = _post(url, params);
  return response.body().string();
 }

 /**
  * 异步的post请求
  *
  * @param url
  * @param callback
  * @param params
  */
 private void _postasyn(string url, final resultcallback callback, param... params)
 {
  request request = buildpostrequest(url, params);
  deliveryresult(callback, request);
 }

 /**
  * 异步的post请求
  *
  * @param url
  * @param callback
  * @param params
  */
 private void _postasyn(string url, final resultcallback callback, map<string, string> params)
 {
  param[] paramsarr = map2params(params);
  request request = buildpostrequest(url, paramsarr);
  deliveryresult(callback, request);
 }

 /**
  * 同步基于post的文件上传
  *
  * @param params
  * @return
  */
 private response _post(string url, file[] files, string[] filekeys, param... params) throws ioexception
 {
  request request = buildmultipartformrequest(url, files, filekeys, params);
  return mokhttpclient.newcall(request).execute();
 }

 private response _post(string url, file file, string filekey) throws ioexception
 {
  request request = buildmultipartformrequest(url, new file[]{file}, new string[]{filekey}, null);
  return mokhttpclient.newcall(request).execute();
 }

 private response _post(string url, file file, string filekey, param... params) throws ioexception
 {
  request request = buildmultipartformrequest(url, new file[]{file}, new string[]{filekey}, params);
  return mokhttpclient.newcall(request).execute();
 }

 /**
  * 异步基于post的文件上传
  *
  * @param url
  * @param callback
  * @param files
  * @param filekeys
  * @throws ioexception
  */
 private void _postasyn(string url, resultcallback callback, file[] files, string[] filekeys, param... params) throws ioexception
 {
  request request = buildmultipartformrequest(url, files, filekeys, params);
  deliveryresult(callback, request);
 }

 /**
  * 异步基于post的文件上传，单文件不带参数上传
  *
  * @param url
  * @param callback
  * @param file
  * @param filekey
  * @throws ioexception
  */
 private void _postasyn(string url, resultcallback callback, file file, string filekey) throws ioexception
 {
  request request = buildmultipartformrequest(url, new file[]{file}, new string[]{filekey}, null);
  deliveryresult(callback, request);
 }

 /**
  * 异步基于post的文件上传，单文件且携带其他form参数上传
  *
  * @param url
  * @param callback
  * @param file
  * @param filekey
  * @param params
  * @throws ioexception
  */
 private void _postasyn(string url, resultcallback callback, file file, string filekey, param... params) throws ioexception
 {
  request request = buildmultipartformrequest(url, new file[]{file}, new string[]{filekey}, params);
  deliveryresult(callback, request);
 }

 /**
  * 异步下载文件
  *
  * @param url
  * @param destfiledir 本地文件存储的文件夹
  * @param callback
  */
 private void _downloadasyn(final string url, final string destfiledir, final resultcallback callback)
 {
  final request request = new request.builder()
    .url(url)
    .build();
  final call call = mokhttpclient.newcall(request);
  call.enqueue(new callback()
  {
   @override
   public void onfailure(final request request, final ioexception e)
   {
    sendfailedstringcallback(request, e, callback);
   }

   @override
   public void onresponse(response response)
   {
    inputstream is = null;
    byte[] buf = new byte[2048];
    int len = 0;
    fileoutputstream fos = null;
    try
    {
     is = response.body().bytestream();
     file file = new file(destfiledir, getfilename(url));
     fos = new fileoutputstream(file);
     while ((len = is.read(buf)) != -1)
     {
      fos.write(buf, 0, len);
     }
     fos.flush();
     //如果下载文件成功，第一个参数为文件的绝对路径
     sendsuccessresultcallback(file.getabsolutepath(), callback);
    } catch (ioexception e)
    {
     sendfailedstringcallback(response.request(), e, callback);
    } finally
    {
     try
     {
      if (is != null) is.close();
     } catch (ioexception e)
     {
     }
     try
     {
      if (fos != null) fos.close();
     } catch (ioexception e)
     {
     }
    }

   }
  });
 }

 private string getfilename(string path)
 {
  int separatorindex = path.lastindexof("/");
  return (separatorindex < 0) ? path : path.substring(separatorindex + 1, path.length());
 }

 /**
  * 加载图片
  *
  * @param view
  * @param url
  * @throws ioexception
  */
 private void _displayimage(final imageview view, final string url, final int errorresid)
 {
  final request request = new request.builder()
    .url(url)
    .build();
  call call = mokhttpclient.newcall(request);
  call.enqueue(new callback()
  {
   @override
   public void onfailure(request request, ioexception e)
   {
    seterrorresid(view, errorresid);
   }

   @override
   public void onresponse(response response)
   {
    inputstream is = null;
    try
    {
     is = response.body().bytestream();
     imageutils.imagesize actualimagesize = imageutils.getimagesize(is);
     imageutils.imagesize imageviewsize = imageutils.getimageviewsize(view);
     int insamplesize = imageutils.calculateinsamplesize(actualimagesize, imageviewsize);
     try
     {
      is.reset();
     } catch (ioexception e)
     {
      response = _getasyn(url);
      is = response.body().bytestream();
     }

     bitmapfactory.options ops = new bitmapfactory.options();
     ops.injustdecodebounds = false;
     ops.insamplesize = insamplesize;
     final bitmap bm = bitmapfactory.decodestream(is, null, ops);
     mdelivery.post(new runnable()
     {
      @override
      public void run()
      {
       view.setimagebitmap(bm);
      }
     });
    } catch (exception e)
    {
     seterrorresid(view, errorresid);

    } finally
    {
     if (is != null) try
     {
      is.close();
     } catch (ioexception e)
     {
      e.printstacktrace();
     }
    }
   }
  });


 }

 private void seterrorresid(final imageview view, final int errorresid)
 {
  mdelivery.post(new runnable()
  {
   @override
   public void run()
   {
    view.setimageresource(errorresid);
   }
  });
 }


 //*************对外公布的方法************


 public static response getasyn(string url) throws ioexception
 {
  return getinstance()._getasyn(url);
 }


 public static string getasstring(string url) throws ioexception
 {
  return getinstance()._getasstring(url);
 }

 public static void getasyn(string url, resultcallback callback)
 {
  getinstance()._getasyn(url, callback);
 }

 public static response post(string url, param... params) throws ioexception
 {
  return getinstance()._post(url, params);
 }

 public static string postasstring(string url, param... params) throws ioexception
 {
  return getinstance()._postasstring(url, params);
 }

 public static void postasyn(string url, final resultcallback callback, param... params)
 {
  getinstance()._postasyn(url, callback, params);
 }


 public static void postasyn(string url, final resultcallback callback, map<string, string> params)
 {
  getinstance()._postasyn(url, callback, params);
 }


 public static response post(string url, file[] files, string[] filekeys, param... params) throws ioexception
 {
  return getinstance()._post(url, files, filekeys, params);
 }

 public static response post(string url, file file, string filekey) throws ioexception
 {
  return getinstance()._post(url, file, filekey);
 }

 public static response post(string url, file file, string filekey, param... params) throws ioexception
 {
  return getinstance()._post(url, file, filekey, params);
 }

 public static void postasyn(string url, resultcallback callback, file[] files, string[] filekeys, param... params) throws ioexception
 {
  getinstance()._postasyn(url, callback, files, filekeys, params);
 }


 public static void postasyn(string url, resultcallback callback, file file, string filekey) throws ioexception
 {
  getinstance()._postasyn(url, callback, file, filekey);
 }


 public static void postasyn(string url, resultcallback callback, file file, string filekey, param... params) throws ioexception
 {
  getinstance()._postasyn(url, callback, file, filekey, params);
 }

 public static void displayimage(final imageview view, string url, int errorresid) throws ioexception
 {
  getinstance()._displayimage(view, url, errorresid);
 }


 public static void displayimage(final imageview view, string url)
 {
  getinstance()._displayimage(view, url, -1);
 }

 public static void downloadasyn(string url, string destdir, resultcallback callback)
 {
  getinstance()._downloadasyn(url, destdir, callback);
 }

 //****************************


 private request buildmultipartformrequest(string url, file[] files,
            string[] filekeys, param[] params)
 {
  params = validateparam(params);

  multipartbuilder builder = new multipartbuilder()
    .type(multipartbuilder.form);

  for (param param : params)
  {
   builder.addpart(headers.of("content-disposition", "form-data; name=\"" + param.key + "\""),
     requestbody.create(null, param.value));
  }
  if (files != null)
  {
   requestbody filebody = null;
   for (int i = 0; i < files.length; i++)
   {
    file file = files[i];
    string filename = file.getname();
    filebody = requestbody.create(mediatype.parse(guessmimetype(filename)), file);
    //todo 根据文件名设置contenttype
    builder.addpart(headers.of("content-disposition",
        "form-data; name=\"" + filekeys[i] + "\"; filename=\"" + filename + "\""),
      filebody);
   }
  }

  requestbody requestbody = builder.build();
  return new request.builder()
    .url(url)
    .post(requestbody)
    .build();
 }

 private string guessmimetype(string path)
 {
  filenamemap filenamemap = urlconnection.getfilenamemap();
  string contenttypefor = filenamemap.getcontenttypefor(path);
  if (contenttypefor == null)
  {
   contenttypefor = "application/octet-stream";
  }
  return contenttypefor;
 }


 private param[] validateparam(param[] params)
 {
  if (params == null)
   return new param[0];
  else return params;
 }

 private param[] map2params(map<string, string> params)
 {
  if (params == null) return new param[0];
  int size = params.size();
  param[] res = new param[size];
  set<map.entry<string, string>> entries = params.entryset();
  int i = 0;
  for (map.entry<string, string> entry : entries)
  {
   res[i++] = new param(entry.getkey(), entry.getvalue());
  }
  return res;
 }

 private static final string session_key = "set-cookie";
 private static final string msessionkey = "jsessionid";

 private map<string, string> msessions = new hashmap<string, string>();

 private void deliveryresult(final resultcallback callback, request request)
 {
  mokhttpclient.newcall(request).enqueue(new callback()
  {
   @override
   public void onfailure(final request request, final ioexception e)
   {
    sendfailedstringcallback(request, e, callback);
   }

   @override
   public void onresponse(final response response)
   {
    try
    {
     final string string = response.body().string();
     if (callback.mtype == string.class)
     {
      sendsuccessresultcallback(string, callback);
     } else
     {
      object o = mgson.fromjson(string, callback.mtype);
      sendsuccessresultcallback(o, callback);
     }


    } catch (ioexception e)
    {
     sendfailedstringcallback(response.request(), e, callback);
    } catch (com.google.gson.jsonparseexception e)//json解析的错误
    {
     sendfailedstringcallback(response.request(), e, callback);
    }

   }
  });
 }

 private void sendfailedstringcallback(final request request, final exception e, final resultcallback callback)
 {
  mdelivery.post(new runnable()
  {
   @override
   public void run()
   {
    if (callback != null)
     callback.onerror(request, e);
   }
  });
 }

 private void sendsuccessresultcallback(final object object, final resultcallback callback)
 {
  mdelivery.post(new runnable()
  {
   @override
   public void run()
   {
    if (callback != null)
    {
     callback.onresponse(object);
    }
   }
  });
 }

 private request buildpostrequest(string url, param[] params)
 {
  if (params == null)
  {
   params = new param[0];
  }
  formencodingbuilder builder = new formencodingbuilder();
  for (param param : params)
  {
   builder.add(param.key, param.value);
  }
  requestbody requestbody = builder.build();
  return new request.builder()
    .url(url)
    .post(requestbody)
    .build();
 }


 public static abstract class resultcallback<t>
 {
  type mtype;

  public resultcallback()
  {
   mtype = getsuperclasstypeparameter(getclass());
  }

  static type getsuperclasstypeparameter(class<?> subclass)
  {
   type superclass = subclass.getgenericsuperclass();
   if (superclass instanceof class)
   {
    throw new runtimeexception("missing type parameter.");
   }
   parameterizedtype parameterized = (parameterizedtype) superclass;
   return $gson$types.canonicalize(parameterized.getactualtypearguments()[0]);
  }

  public abstract void onerror(request request, exception e);

  public abstract void onresponse(t response);
 }

 public static class param
 {
  public param()
  {
  }

  public param(string key, string value)
  {
   this.key = key;
   this.value = value;
  }

  string key;
  string value;
 }


}

源码地址：demo下载
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。