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(fǎng)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：
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.VeVB.COm/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)Requestfinal Request request = new Request.Builder() .url("https://github.com/hongyangAndroid") .build();//new callCall 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(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(xiàn)程并不是UI線(xiàn)程。的確是的，如果你希望操作控件，還是需要使用handler等，例如：
@Overridepublic 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(xiàn)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(xiàn)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.VeVB.COm/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武林網(wǎng)。
新聞熱點(diǎn)
疑難解答
圖片精選
網(wǎng)友關(guān)注
