Android OKHTTP3.4版本封装

OKHTTP是Android目前比较火的请求数据的框架，介绍可以看看官方的http://square.github.io/okhttp/

使用OKHTTP记得关联okio-1.11.0.jar包

OKHTTP得到的数据格式本身就是UTF-8的，如果需要，可以在返回的Response.body进行转换

OKHTTP建议全局只有一个OkHttpClient，如果需要更改初始化参数，可以使用newBuilder来colne新的对象进行初始化设置

OKHTTP有同步和异步的请求方法，这边使用异步请求的方式进行封装

OKHTTP的回调中不能更新UI，因此要自己再封装一层

这里封装有点不满意，如果有更好的，请告诉我一下

package com.example.textdemo;import java.io.IOException;import android.os.Handler;import android.os.Message;import okhttp3.Call;import okhttp3.Callback;import okhttp3.Response;public abstract class CallbackUTF8 implements Callback{Handler mHandler;public CallbackUTF8(Handler mHandler){super();this.mHandler = mHandler;}@Overridepublic void onFailure(Call arg0, IOException arg1) {onFailure(arg1);}@Overridepublic void onResponse(Call arg0, final Response arg1) throws IOException {mHandler.post(new Runnable() {@Overridepublic void run() {try {onTResponse(arg1, arg1.body().string());} catch (IOException e) {e.printStackTrace();}}});}public abstract void onTResponse(Response response, String utf8);public abstract void onFailure(IOException arg1);}

下面是对get，还有post的封装

package com.example.textdemo;import java.io.File;import java.io.IOException;import java.io.OutputStream;import java.util.Iterator;import java.util.Map;import java.util.Set;import java.util.concurrent.TimeUnit;import android.text.TextUtils;import okhttp3.Cache;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.Headers;import okhttp3.MediaType;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Request.Builder;import okio.BufferedSink;/** *  * @author Administrator * * * 如果要取得返回数据的header，可以在header.headers()，默认返回的字符串就是UTF-8-response.body().string()，get * 添加权限 <uses-permission android:name="android.permission.INTERNET"/>    //下面这些事使用到缓存的时候需要用的    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> * */public class OkHttpUtil {private static final String CHARSET_NAME = "UTF-8";//懒汉式private static OkHttpClient mOkHttpClient;//缓存路径private static final String FilePath = "OKHTTPCacheFile";//缓存大小private static final int cacheSize = 10 * 1024 * 1024; // 10 MiB//链接缓存时间单位秒private static final int conectTimeout = 10;//写入缓存时间单位秒private static final int writeTimeout = 10;//读取缓存时间单位秒private static final int readTimeout = 30;private OkHttpUtil(){}//初始化public static void initOkHttpUtil(){if (mOkHttpClient == null){synchronized (OkHttpUtil.class) {if (mOkHttpClient == null){File cacheDirectory = new File(FilePath);    Cache cache = new Cache(cacheDirectory, cacheSize);    mOkHttpClient = new OkHttpClient().newBuilder()    .cache(cache)//最好不要更改cache目录            .connectTimeout(conectTimeout, TimeUnit.SECONDS)//设置相应时间            .writeTimeout(writeTimeout, TimeUnit.SECONDS)            .readTimeout(readTimeout, TimeUnit.SECONDS)    .build();}}}}//TODO 克隆一个client，更改链接时间等参数设置public static OkHttpClient OkHttpClientClone(int conTime, int WriteTime, int ReadTime){if (mOkHttpClient == null){initOkHttpUtil();}OkHttpClient build = mOkHttpClient.newBuilder().connectTimeout(conTime, TimeUnit.SECONDS).writeTimeout(WriteTime, TimeUnit.SECONDS).readTimeout(ReadTime, TimeUnit.SECONDS).build();return build;}/** * 异步请求数据，有回调参数 * @param url * @param callback */public static void get(String url, CallbackUTF8 callback){Request request = new Request.Builder()                .url(url)                .build();if (mOkHttpClient == null){initOkHttpUtil();}Call newCall = mOkHttpClient.newCall(request);newCall.enqueue(callback);}/** * url参数较多时，可以使用map来拼接参数 * @param url * @param headerMap * @param callback */public static void get(String url, Map<String, String> params, CallbackUTF8 callback){String urls = buildParams(url, params);get(urls, callback);}/** * 带header的get请求 如果url参数比较多，可以传递map，直观点 * @param urls * @param params * @param headerMap * @param callback */public static void get(String urls, Map<String, String> params, Map<String, String> headerMap, CallbackUTF8 callback){String url = buildParams(urls, params);Builder builder = new Request.Builder();for (String str : headerMap.keySet()) {builder.addHeader(str, headerMap.get(str));}Request request = builder                .url(url)                .build();if (mOkHttpClient == null){initOkHttpUtil();}Call newCall = mOkHttpClient.newCall(request);newCall.enqueue(callback);}/** * 简单的post请求 * @param url * @param params * @param callback */public static void post(String url, Map<String, String> params, CallbackUTF8 callback){okhttp3.FormBody.Builder builder = new FormBody.Builder();for (String key : params.keySet()) {builder.add(key, params.get(key));}RequestBody body = builder.build();Request requeset = new Request.Builder().url(url).post(body).build();if (mOkHttpClient == null){initOkHttpUtil();}Call newCall = mOkHttpClient.newCall(requeset);newCall.enqueue(callback);}/** * 提交文件 * @param url * @param file * @param callback */public void postFile(String url, File file, CallbackUTF8 callback){final MediaType MEDIA_TYPE_MARKDOWN  = MediaType.parse("text/x-markdown; charset=utf-8");    Request request = new Request.Builder()        .url(url)        .post(RequestBody.create(MEDIA_TYPE_MARKDOWN, file))        .build();if (mOkHttpClient == null){initOkHttpUtil();}Call newCall = mOkHttpClient.newCall(request);newCall.enqueue(callback);}/** * 拼接url参数 * @param url * @param params * @return */public static String buildParams(String url, Map<String, String> params) {if (TextUtils.isEmpty(url)) {return url;}if (params == null || params.size() == 0) {return url;}url += "?";Set<String> keySet = params.keySet();Iterator<String> itr = keySet.iterator();while (itr.hasNext()) {String key = itr.next();url += key + "=" + params.get(key) + "&";}url = url.substring(0, url.length() - 1);return url;}public static void cancelAllCall(){if (mOkHttpClient == null){return;}}}