詳解Android OkHttp完全解析

更新時(shí)間：2016年11月24日 16:42:11 作者：鴻洋_

本篇文章主要介紹了Android OkHttp完全解析，現(xiàn)在就分享給大家，也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

一、概述

最近在群里聽(tīng)到各種討論okhttp的話(huà)題，可見(jiàn)okhttp的口碑相當(dāng)好了。再加上Google貌似在6.0版本里面刪除了HttpClient相關(guān)API，對(duì)于這個(gè)行為不做評(píng)價(jià)。為了更好的在應(yīng)對(duì)網(wǎng)絡(luò)訪問(wèn)，學(xué)習(xí)下okhttp還是蠻必要的，本篇博客首先介紹okhttp的簡(jiǎn)單使用，主要包含：

一般的get請(qǐng)求
一般的post請(qǐng)求
基于Http的文件上傳
文件下載
加載圖片
支持請(qǐng)求回調(diào)，直接返回對(duì)象、對(duì)象集合
支持session的保持

最后會(huì)對(duì)上述幾個(gè)功能進(jìn)行封裝，完整的封裝類(lèi)的地址見(jiàn)：http://xiazai.jb51.net/201611/yuanma/okhttputils-master_jb51.zip

使用前，對(duì)于Android Studio的用戶(hù)，可以選擇添加:
compile 'com.squareup.okhttp:okhttp:2.4.0'
或者Eclipse的用戶(hù)，可以下載最新的jarokhttp he latest JAR ，添加依賴(lài)就可以用了。

注意:okhttp內(nèi)部依賴(lài)okio，別忘了同時(shí)導(dǎo)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

對(duì)了網(wǎng)絡(luò)加載庫(kù)，那么最常見(jiàn)的肯定就是http get請(qǐng)求了，比如獲取一個(gè)網(wǎng)頁(yè)的內(nèi)容。

//創(chuàng)建okHttpClient對(duì)象
OkHttpClient mOkHttpClient = new OkHttpClient();
//創(chuàng)建一個(gè)Request
final Request request = new Request.Builder()
    .url("https://github.com/hongyangAndroid")
    .build();
//new call
Call call = mOkHttpClient.newCall(request); 
//請(qǐng)求加入調(diào)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.以上就是發(fā)送一個(gè)get請(qǐng)求的步驟，首先構(gòu)造一個(gè)Request對(duì)象，參數(shù)最起碼有個(gè)url，當(dāng)然你可以通過(guò)Request.Builder設(shè)置更多的參數(shù)比如：header、method等。

2.然后通過(guò)request的對(duì)象去構(gòu)造得到一個(gè)Call對(duì)象，類(lèi)似于將你的請(qǐng)求封裝成了任務(wù)，既然是任務(wù)，就會(huì)有execute()和cancel()等方法。

3.最后，我們希望以異步的方式去執(zhí)行請(qǐng)求，所以我們調(diào)用的是call.enqueue，將call加入調(diào)度隊(duì)列，然后等待任務(wù)執(zhí)行完成，我們?cè)贑allback中即可得到結(jié)果。

看到這，你會(huì)發(fā)現(xiàn)，整體的寫(xiě)法還是比較長(zhǎng)的，所以封裝肯定是要做的，不然每個(gè)請(qǐng)求這么寫(xiě)，得累死。

ok，需要注意幾點(diǎn)：

1、onResponse回調(diào)的參數(shù)是response，一般情況下，比如我們希望獲得返回的字符串，可以通過(guò)response.body().string()獲?。蝗绻Ｍ@得返回的二進(jìn)制字節(jié)數(shù)組，則調(diào)用response.body().bytes()；如果你想拿到返回的inputStream，則調(diào)用response.body().byteStream()

看到這，你可能會(huì)奇怪，竟然還能拿到返回的inputStream，看到這個(gè)最起碼能意識(shí)到一點(diǎn)，這里支持大文件下載，有inputStream我們就可以通過(guò)IO的方式寫(xiě)文件。不過(guò)也說(shuō)明一個(gè)問(wèn)題，這個(gè)onResponse執(zhí)行的線程并不是UI線程。的確是的，如果你希望操作控件，還是需要使用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、我們這里是異步的方式去執(zhí)行，當(dāng)然也支持阻塞的方式，上面我們也說(shuō)了Call有一個(gè)execute()方法，你也可以直接調(diào)用call.execute()通過(guò)返回一個(gè)Response。

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

(二) Http Post 攜帶參數(shù)

看來(lái)上面的簡(jiǎn)單的get請(qǐng)求，基本上整個(gè)的用法也就掌握了，比如post攜帶參數(shù)，也僅僅是Request的構(gòu)造的不同。

Request request = buildMultipartFormRequest(
  url, new File[]{file}, new String[]{fileKey}, null);
FormEncodingBuilder builder = new FormEncodingBuilder(); 
builder.add("username","張鴻洋");

Request request = new Request.Builder()
     .url(url)
    .post(builder.build())
    .build();
 mOkHttpClient.newCall(request).enqueue(new Callback(){});

大家都清楚，post的時(shí)候，參數(shù)是包含在請(qǐng)求體中的；所以我們通過(guò)FormEncodingBuilder。添加多個(gè)String鍵值對(duì)，然后去構(gòu)造RequestBody，最后完成我們Request的構(gòu)造。

后面的就和上面一樣了。

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

（三）基于Http的文件上傳

接下來(lái)我們?cè)诮榻B一個(gè)可以構(gòu)造RequestBody的Builder，叫做MultipartBuilder。當(dāng)我們需要做類(lèi)似于表單上傳的時(shí)候，就可以使用它來(lái)構(gòu)造我們的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, "張鴻洋"))
  .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()
{
 //...
});

上述代碼向服務(wù)器傳遞了一個(gè)鍵值對(duì)username:張鴻洋和一個(gè)文件。我們通過(guò)MultipartBuilder的addPart方法可以添加鍵值對(duì)或者文件。

其實(shí)類(lèi)似于我們拼接模擬瀏覽器行為的方式，如果你對(duì)這塊不了解，可以參考：從原理角度解析Android （Java） http 文件上傳

ok，對(duì)于我們最開(kāi)始的目錄還剩下圖片下載，文件下載；這兩個(gè)一個(gè)是通過(guò)回調(diào)的Response拿到byte[]然后decode成圖片；文件下載，就是拿到inputStream做寫(xiě)文件操作，我們這里就不贅述了。

接下來(lái)我們主要看如何封裝上述的代碼。

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

三、封裝

由于按照上述的代碼，寫(xiě)多個(gè)請(qǐng)求肯定包含大量的重復(fù)代碼，所以我希望封裝后的代碼調(diào)用是這樣的：

（一）使用

1.一般的get請(qǐng)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);//注意這里是UI線程
   }
  });

對(duì)于一般的請(qǐng)求，我們希望給個(gè)url，然后CallBack里面直接操作控件。

2.文件上傳且攜帶參數(shù)

我們希望提供一個(gè)方法，傳入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")}
  );

鍵值對(duì)沒(méi)什么說(shuō)的，參數(shù)3為file，參數(shù)4為file對(duì)應(yīng)的name，這個(gè)name不是文件的名字；
對(duì)應(yīng)于http中的

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

對(duì)應(yīng)的是name后面的值，即mFile.

3.文件下載

對(duì)于文件下載，提供url，目標(biāo)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)
  {
   //文件下載成功，這里回調(diào)的reponse為文件的absolutePath
  }
});

4.展示圖片

展示圖片，我們希望提供一個(gè)url和一個(gè)imageview，如果下載成功，直接幫我們?cè)O(shè)置上即可。

OkHttpClientManager.displayImage(mImageView, 
  http://images.csdn.net/20150817/1.jpg);

內(nèi)部會(huì)自動(dòng)根據(jù)imageview的大小自動(dòng)對(duì)圖片進(jìn)行合適的壓縮。雖然，這里可能不適合一次性加載大量圖片的場(chǎng)景，但是對(duì)于app中偶爾有幾個(gè)圖片的加載，還是可用的。

四、整合Json

很多人提出項(xiàng)目中使用時(shí)，服務(wù)端返回的是Json字符串，希望客戶(hù)端回調(diào)可以直接拿到對(duì)象，于是整合進(jìn)入了json，完善該功能。

（一）直接回調(diào)對(duì)象

例如現(xiàn)在有個(gè)User實(shí)體類(lèi)：

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 + '\'' +
    '}';
 }
}

服務(wù)端返回：

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

客戶(hù)端可以如下方式調(diào)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線程
 }
});

我們傳入泛型User，在onResponse里面直接回調(diào)User對(duì)象。

這里特別要注意的事，如果在json字符串->實(shí)體對(duì)象過(guò)程中發(fā)生錯(cuò)誤，程序不會(huì)崩潰，onError方法會(huì)被回調(diào)。

注意：這里做了少許的更新，接口命名從StringCallback修改為ResultCallback。接口中的onFailure方法修改為onError。

(二) 回調(diào)對(duì)象集合

依然是上述的User類(lèi)，服務(wù)端返回

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

則客戶(hù)端可以如下調(diào)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());
 }
});

唯一的區(qū)別，就是泛型變?yōu)長(zhǎng)ist<User> ，ok ，如果發(fā)現(xiàn)bug或者有任何意見(jiàn)歡迎留言。

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

源碼

ok，基本介紹完了，對(duì)于封裝的代碼其實(shí)也很簡(jiǎn)單，我就直接貼出來(lái)了，因?yàn)橐矝](méi)什么好介紹的，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請(qǐng)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請(qǐng)求
  *
  * @param url
  * @return 字符串
  */
 private String _getAsString(String url) throws IOException
 {
  Response execute = _getAsyn(url);
  return execute.body().string();
 }


 /**
  * 異步的get請(qǐng)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請(qǐng)求
  *
  * @param url
  * @param params post的參數(shù)
  * @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請(qǐng)求
  *
  * @param url
  * @param params post的參數(shù)
  * @return 字符串
  */
 private String _postAsString(String url, Param... params) throws IOException
 {
  Response response = _post(url, params);
  return response.body().string();
 }

 /**
  * 異步的post請(qǐng)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);
 }

 /**
  * 異步的post請(qǐng)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的文件上傳
  *
  * @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();
 }

 /**
  * 異步基于post的文件上傳
  *
  * @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);
 }

 /**
  * 異步基于post的文件上傳，單文件不帶參數(shù)上傳
  *
  * @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);
 }

 /**
  * 異步基于post的文件上傳，單文件且攜帶其他form參數(shù)上傳
  *
  * @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);
 }

 /**
  * 異步下載文件
  *
  * @param url
  * @param destFileDir 本地文件存儲(chǔ)的文件夾
  * @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();
     //如果下載文件成功，第一個(gè)參數(shù)為文件的絕對(duì)路徑
     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());
 }

 /**
  * 加載圖片
  *
  * @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);
   }
  });
 }


 //*************對(duì)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 根據(jù)文件名設(shè)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解析的錯(cuò)誤
    {
     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;
 }


}

源碼地址：demo下載http://xiazai.jb51.net/201611/yuanma/okhttputils-master_jb51.zip
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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