Android OkHttp網絡連接封裝工具類

package com.lidong.demo.utils;

import android.os.Handler;
import android.os.Looper;

import com.google.gson.internal.$Gson$Types;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.FormEncodingBuilder;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;

import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.net.CookieManager;
import java.net.CookiePolicy;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * Description : OkHttp網絡連接封裝工具類
 * Author : ldong
 * Date   : 16/1/31
 */
public class OkHttpUtils {

    private static final String TAG = "OkHttpUtils";

    private static OkHttpUtils mInstance;
    private OkHttpClient mOkHttpClient;
    private Handler mHandler;

    private OkHttpUtils() {
        /**
         * 構建OkHttpClient
         */
        mOkHttpClient = new OkHttpClient();
        /**
         * 設置連接的超時時間
         */
        mOkHttpClient.setConnectTimeout(10, TimeUnit.SECONDS);
        /**
         * 設置響應的超時時間
         */
        mOkHttpClient.setWriteTimeout(10, TimeUnit.SECONDS);
        /**
         * 請求的超時時間
         */
        mOkHttpClient.setReadTimeout(30, TimeUnit.SECONDS);
        /**
         * 允許使用Cookie
         */
        mOkHttpClient.setCookieHandler(new CookieManager(null, CookiePolicy.ACCEPT_ORIGINAL_SERVER));
        /**
         * 獲取主線程的handler
         */
        mHandler = new Handler(Looper.getMainLooper());
    }

    /**
     * 通過單例模式構造對象
     * @return OkHttpUtils
     */
    private synchronized static OkHttpUtils getmInstance() {
        if (mInstance == null) {
            mInstance = new OkHttpUtils();
        }
        return mInstance;
    }

    /**
     * 構造Get請求
     * @param url  請求的url
     * @param callback  結果回調的方法
     */
    private void getRequest(String url, final ResultCallback callback) {
        final Request request = new Request.Builder().url(url).build();
        deliveryResult(callback, request);
    }

    /**
     * 構造post 請求
     * @param url 請求的url
     * @param callback 結果回調的方法
     * @param params 請求參數
     */
    private void postRequest(String url, final ResultCallback callback, List<Param> params) {
        Request request = buildPostRequest(url, params);
        deliveryResult(callback, request);
    }

    /**
     * 處理請求結果的回調
     * @param callback
     * @param request
     */
    private void deliveryResult(final ResultCallback callback, Request request) {

        mOkHttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Request request, final IOException e) {
                sendFailCallback(callback, e);
            }

            @Override
            public void onResponse(Response response) throws IOException {
                try {
                    String str = response.body().string();
                    if (callback.mType == String.class) {
                        sendSuccessCallBack(callback, str);
                    } else {
                        Object object = JsonUtils.deserialize(str, callback.mType);
                        sendSuccessCallBack(callback, object);
                    }
                } catch (final Exception e) {
                    LogUtils.e(TAG, "convert json failure", e);
                    sendFailCallback(callback, e);
                }

            }
        });
    }

    /**
     * 發送失敗的回調
     * @param callback
     * @param e
     */
    private void sendFailCallback(final ResultCallback callback, final Exception e) {
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                if (callback != null) {
                    callback.onFailure(e);
                }
            }
        });
    }

    /**
     * 發送成功的調
     * @param callback
     * @param obj
     */
    private void sendSuccessCallBack(final ResultCallback callback, final Object obj) {
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                if (callback != null) {
                    callback.onSuccess(obj);
                }
            }
        });
    }

    /**
     * 構造post請求
     * @param url  請求url
     * @param params 請求的參數
     * @return 返回 Request
     */
    private Request buildPostRequest(String url, List<Param> params) {
        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();
    }


    /**********************對外接口************************/

    /**
     * get請求
     * @param url  請求url
     * @param callback  請求回調
     */
    public static void get(String url, ResultCallback callback) {
        getmInstance().getRequest(url, callback);
    }

    /**
     * post請求
     * @param url       請求url
     * @param callback  請求回調
     * @param params    請求參數
     */
    public static void post(String url, final ResultCallback callback, List<Param> params) {
        getmInstance().postRequest(url, callback, params);
    }

    /**
     * http請求回調類,回調方法在UI線程中執行
     * @param <T>
     */
    public static abstract class ResultCallback<T> {

        Type mType;

        public ResultCallback(){
            mType = getSuperclassTypeParameter(getClass());
        }

        static Type getSuperclassTypeParameter(Class<?> subclass) {
            Type superclass = subclass.getGenericSuperclass();//返回父類的類型
            if (superclass instanceof Class) {
                throw new RuntimeException("Missing type parameter.");
            }
            ParameterizedType parameterized = (ParameterizedType) superclass;
            return $Gson$Types.canonicalize(parameterized.getActualTypeArguments()[0]);
        }

        /**
         * 請求成功回調
         * @param response
         */
        public abstract void onSuccess(T response);

        /**
         * 請求失敗回調
         * @param e
         */
        public abstract void onFailure(Exception e);
    }

    /**
     * post請求參數類
     */
    public static class Param {

        String key;//請求的參數
        String value;//參數的值

        public Param() {
        }

        public Param(String key, String value) {
            this.key = key;
            this.value = value;
        }

    }


}