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Android OkHttp完全解析

發(fā)布時(shí)間：2025/4/16 Android 30 豆豆

生活随笔收集整理的這篇文章主要介紹了 Android OkHttp完全解析小編覺(jué)得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.

http://blog.csdn.net/lmj623565791/article/details/47911083；本文出自:【張鴻洋的博客】

1. 概述

最近在群里聽(tīng)到各種討論okhttp的話題，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，完整的封裝類的地址見(jiàn)：https://github.com/hongyangAndroid/okhttp-utils

使用前，對(duì)于Android Studio的用戶，可以選擇添加:

compile 'com.squareup.okhttp:okhttp:2.4.0'11

或者Eclipse的用戶，可以下載最新的jar okhttp he latest JAR ，添加依賴就可以用了。

注意:okhttp內(nèi)部依賴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

2. 使用教程

2.1 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(){@Overridepublic void onFailure(Request request, IOException e){}@Overridepublic void onResponse(final Response response) throws IOException{//String htmlStr = response.body().string();}});

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。

然后通過(guò)request的對(duì)象去構(gòu)造得到一個(gè)Call對(duì)象，類似于將你的請(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。

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，得累死。

ok，需要注意幾點(diǎn)：

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()獲取；如果希望獲得返回的二進(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(){@Overridepublic void run(){mTv.setText(res);}}); }

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。

2.2 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(){});1234567891012345678910

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。

2.3 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做寫文件操作，我們這里就不贅述了。

關(guān)于用法，也可以參考泡網(wǎng)OkHttp使用教程

接下來(lái)我們主要看如何封裝上述的代碼。

3. 封裝

由于按照上述的代碼，寫多個(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：

3.1 使用

一般的get請(qǐng)求

OkHttpClientManager.getAsyn("https://www.baidu.com", new OkHttpClientManager.ResultCallback<String>(){@Overridepublic void onError(Request request, Exception e){e.printStackTrace();}@Overridepublic void onResponse(String u){mTv.setText(u);//注意這里是UI線程}});12345678910111213141234567891011121314

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。

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>(){@Overridepublic void onError(Request request, IOException e){e.printStackTrace();}@Overridepublic 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.

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>(){@Overridepublic void onError(Request request, IOException e){}@Overridepublic void onResponse(String response){//文件下載成功，這里回調(diào)的reponse為文件的absolutePath} });

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");1212

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。

4. 整合Gson

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，希望客戶端回調(diào)可以直接拿到對(duì)象，于是整合進(jìn)入了Gson，完善該功能。

4.1 直接回調(diào)對(duì)象

例如現(xiàn)在有個(gè)User實(shí)體類：

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;}@Overridepublic String toString(){return "User{" +"username='" + username + '\'' +", password='" + password + '\'' +'}';} }

服務(wù)端返回：

{"username":"zhy","password":"123"}11

客戶端可以如下方式調(diào)用：

OkHttpClientManager.getAsyn("http://192.168.56.1:8080/okHttpServer/user!getUser", new OkHttpClientManager.ResultCallback<User>() {@Overridepublic void onError(Request request, Exception e){e.printStackTrace();}@Overridepublic 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。

4.2 回調(diào)對(duì)象集合

依然是上述的User類，服務(wù)端返回

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

則客戶端可以如下調(diào)用：

OkHttpClientManager.getAsyn("http://192.168.56.1:8080/okHttpServer/user!getUsers", new OkHttpClientManager.ResultCallback<List<User>>() {@Overridepublic void onError(Request request, Exception e){e.printStackTrace();}@Overridepublic 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。

5. 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 enabledmOkHttpClient.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(){@Overridepublic void onFailure(final Request request, final IOException e){sendFailedStringCallback(request, e, callback);}@Overridepublic 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(){@Overridepublic void onFailure(Request request, IOException e){setErrorResId(view, errorResId);}@Overridepublic 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(){@Overridepublic 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(){@Overridepublic 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contentTypebuilder.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(){@Overridepublic void onFailure(final Request request, final IOException e){sendFailedStringCallback(request, e, callback);}@Overridepublic 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(){@Overridepublic void run(){if (callback != null)callback.onError(request, e);}});}private void sendSuccessResultCallback(final Object object, final ResultCallback callback){mDelivery.post(new Runnable(){@Overridepublic 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okhttp-utils，大家可以自己下載查看。

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