OKUtils.java

package com.realmo.utils;

import android.os.Handler;
import android.os.Looper;
import android.util.Log;

import com.google.gson.internal.$Gson$Types;

import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import java.util.List;


import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
 * Created by realmo on 2016/9/29.
 */

public class OKUtils {
    private static final String TAG = "OkHttpUtils";
    static volatile OkHttpClient mOkHttpClient;
    private static OKUtils mInstance;
    private Handler mDelivery;

    public OKUtils() {
        mOkHttpClient = new OkHttpClient();

        mDelivery = new Handler(Looper.getMainLooper());
    }

    private synchronized static OKUtils getmInstance() {
        if (mInstance == null) {
            mInstance = new OKUtils();
        }
        return mInstance;
    }


    private void getRequest(String url, final OKUtils.ResultCallback callback) {
        final Request request = new Request.Builder().url(url).build();
        deliveryResult(callback, request);
    }

    private void postRequest(String url, final OKUtils.ResultCallback callback, List<OKUtils.Param> params) {
        Request request = buildPostRequest(url, params);
        deliveryResult(callback, request);
    }

    private void deliveryResult(final OKUtils.ResultCallback callback, Request request) {

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

            @Override
            public void onResponse(Call call, 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) {
                    Log.e(TAG, "convert json failure", e);
                    sendFailCallback(callback, e);
                }

            }
        });
    }

    private void sendFailCallback(final OKUtils.ResultCallback callback, final Exception e) {
        mDelivery.post(new Runnable() {
            @Override
            public void run() {
                if (callback != null) {
                    callback.onFailure(e);
                }
            }
        });
    }

    private void sendSuccessCallBack(final OKUtils.ResultCallback callback, final Object obj) {
        mDelivery.post(new Runnable() {
            @Override
            public void run() {
                if (callback != null) {
                    callback.onSuccess(obj);
                }
            }
        });
    }

    private Request buildPostRequest(String url, List<OKUtils.Param> params) {
        FormBody.Builder builder = new FormBody.Builder();
        for (OKUtils.Param param : params) {
            builder.add(param.key, param.value);
        }
        RequestBody requestBody = builder.build();
        return new Request.Builder().url(url).post(requestBody).build();
    }


    /**********************对外接口************************/

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

    /**
     * post请求
     *
     * @param url      请求url
     * @param callback 请求回调
     * @param params   请求参数
     */
    public static void post(String url, final OKUtils.ResultCallback callback, List<OKUtils.Param> params) {
        getmInstance().postRequest(url, callback, params);
    }


    /**
     * http请求回调类,回调方法在UI线程中执行
     *
     * @param <T>
     */
    public static abstract class ResultCallback<T> {

        Type mType;

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

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

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

        /**
         * 请求失败回调
         * c
         * @param e
         */
        public abstract void onFailure(Exception e);
    }


    /**
     * post请求参数类
     */
    public static class Param {

        String key;
        String value;

        public Param() {
        }

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

    }

}