Android OkHttp、pos、get、文件上传下载工具类_android下载文件工具类

OkHttp、pos、get、文件上传下载工具类

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;


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.io.Serializable;
import java.net.ConnectException;
import java.net.FileNameMap;
import java.net.SocketTimeoutException;
import java.net.URLConnection;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class OkHttpClientManager {
    private static OkHttpClientManager mInstance;
    private final OkHttpClient mOkHttpClient;
    private final Handler mDelivery;
    Context context;

    private static final String TAG = "OkHttpClientManager";


    private OkHttpClientManager() {
        mOkHttpClient = new OkHttpClient();
        //设置信任证书
        mOkHttpClient.setSslSocketFactory(createSSLSocketFactory());
        mOkHttpClient.setHostnameVerifier(new TrustAllHostnameVerifier());

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

    public static OkHttpClientManager getInstance() {
        if (mInstance == null) {
            synchronized (OkHttpClientManager.class) {
                if (mInstance == null) {
                    mInstance = new OkHttpClientManager();
                }
            }
        }
        return mInstance;
    }


//    public static void logingetAsyn(String url, StringCallback callback) {
//        getInstance()._getAsyn(url, callback);
//    }


    /**
     * 同步的Get请求
     *
     * @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);
        return call.execute();
    }


    /**
     * 同步的Get请求
     *
     * @param url
     * @return 字符串
     */
    private String _getAsString(String url) throws IOException {
        Response execute = _getAsyn(url);
        return execute.body().string();
    }


    private String _getAsString11(String url) throws IOException {
        final Request request = new Request.Builder()
                .url(url)
                .build();
        Call call = mOkHttpClient.newCall(request);
        if (call.execute().isSuccessful()) {
            return "200";
        } else {
            return "000";
        }
//        return "";
    }


    /**
     * 异步的get请求
     *
     * @param url
     * @param callback
     */
    public void _getAsyn(String url, final StringCallback callback, Context context) {
        final Request request = new Request.Builder()
                .url(url)
                .build();
        deliveryResult(callback, request, context);
    }


    //自定义SS验证相关类
    private static class TrustAllCerts implements X509TrustManager {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }
    }

    private static class TrustAllHostnameVerifier implements HostnameVerifier {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    }

    private static SSLSocketFactory createSSLSocketFactory() {
        SSLSocketFactory ssfFactory = null;
        try {
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(null, new TrustManager[]{new TrustAllCerts()}, new SecureRandom());
            ssfFactory = sc.getSocketFactory();
        } catch (Exception e) {
        }
        return ssfFactory;
    }


    /**
     * 同步的Post请求
     *
     * @param url
     * @param params post的参数
     * @return
     */
    private Response _post(String url, Param... params) throws IOException {
        Request request = buildPostRequest(url, params);
        return mOkHttpClient.newCall(request).execute();
    }


    /**
     * 同步的Post请求
     *
     * @param url
     * @param params post的参数
     * @return 字符串
     */
    private String _postAsString(String url, Param... params) throws IOException {
        Response response = _post(url, params);
        return response.body().string();
    }

    /**
     * 异步的post请求
     *
     * @param url
     * @param callback
     * @param params
     */
    public void _postAsyn(String url, final StringCallback callback, Context context, Param... params) {

        Request request = buildPostRequest(url, params);


        deliveryResult(callback, request, context);
    }

    /**
     * 异步的post请求(带cookie)
     *
     * @param url
     * @param callback
     * @param params
     */
    public void _postAsynCookie(String url, final StringCallback callback, String cookie, Context context, Param... params) {
        Request request = buildPostRequestCooike(url, cookie, params);
        deliveryResult(callback, request, context);
    }

    public void _postAsynCookieSP(String url, final StringCallback callback, String cookie, Context context, Map<String, String> map) {
        Request request = buildPostRequestCooikeSp(url, cookie, map);
        deliveryResult(callback, request, context);
    }


    private Request buildPostRequestCooikeSp(String url, String cookie, Map<String, String> map) {
        if (map == null) {
            map = new HashMap<>();
        }
        FormEncodingBuilder builder = new FormEncodingBuilder();
        for (Map.Entry<String, String> param : map.entrySet()) {
            if (param.getKey() != null && param.getValue() != null) {
                builder.add(param.getKey(), param.getValue());
                Log.e(TAG, "buildPostRequestCooikeSp: " + param.getKey() + "----" + param.getValue());
            } else {
                builder.add("", "");
            }
        }
        RequestBody requestBody = builder.build();
        return new Request.Builder()
                .url(url)
                .post(requestBody)
                .addHeader("cookie", cookie)
                .build();
    }


    /**
     * 异步的post请求(带cookie)
     *
     * @param url
     * @param callback
     */
    public void _postAsynCookie11(String url, final StringCallback callback, String cookie, Context context) {
        Request request = buildPostRequestCooike1(url, cookie);
        deliveryResult(callback, request, context);
    }


    private Request buildPostRequestCooike1(String url, String cookie) {

        FormEncodingBuilder builder = new FormEncodingBuilder();
        return new Request.Builder()
                .url(url)
                .addHeader("cookie", cookie)
                .build();
    }


    /**
     * 异步的post请求
     *
     * @param url
     * @param callback
     * @param params
     */
    public void _postAsyn(String url, final StringCallback callback, Map<String, String> params, Context context) {
        Param[] paramsArr = map2Params(params);
        Request request = buildPostRequest(url, paramsArr);
        deliveryResult(callback, request, context);
    }

    /**
     * 同步基于post的文件上传
     *
     * @param params
     * @return
     */
    private Response _post(String url, String[] fileName, File[] files, String[] fileKeys, Param... params) throws IOException {
        Request request = buildMultipartFormRequest(url, fileName, files, fileKeys, params);
        return mOkHttpClient.newCall(request).execute();
    }

    private Response _post(String url, String[] fileName, File file, String fileKey) throws IOException {
        Request request = buildMultipartFormRequest(url, fileName, new File[]{file}, new String[]{fileKey}, null);
        return mOkHttpClient.newCall(request).execute();
    }

    private Response _post(String url, String[] fileName, File file, String fileKey, Param... params) throws IOException {
        Request request = buildMultipartFormRequest(url, fileName, new File[]{file}, new String[]{fileKey}, params);
        return mOkHttpClient.newCall(request).execute();
    }

    /**
     * 异步基于post的文件上传
     *
     * @param url
     * @param callback
     * @param files
     * @param fileKeys
     * @throws IOException
     */
    public void _postAsyn(String url, String[] fileName, StringCallback callback, File[] files, String[] fileKeys, Context context, Param... params) throws IOException {
        Request request = buildMultipartFormRequest(url, fileName, files, fileKeys, params);
        deliveryResult(callback, request, context);
    }

    /**
     * 异步基于post的文件上传
     *
     * @param url
     * @param callback
     * @param files
     * @param fileKeys
     * @throws IOException
     */
    public void _postAsynUp(String url, StringCallback callback, File[] files, String[] fileKeys, Context context, Param... params) throws IOException {
        Request request = buildMultipartFormRequestUp(url, files, fileKeys, params);
        deliveryResult(callback, request, context);
    }

    //异步基于post的文件上传 携带cookie
    public void _postAsynCookie(String url, String cookie, StringCallback callback, File[] files, String[] fileKeys, Context context, Param... params) throws IOException {
        Request request = buildMultipartFormcookie(url, cookie, files, fileKeys, params);
        deliveryResult(callback, request, context);
    }

    /**
     * 异步基于post的文件上传，单文件不带参数上传
     *
     * @param url
     * @param callback
     * @param file
     * @param fileKey
     * @throws IOException
     */
    private void _postAsyn(String url, String[] fileName, StringCallback callback, File file, String fileKey, Context context) throws IOException {
        Request request = buildMultipartFormRequest(url, fileName, new File[]{file}, new String[]{fileKey}, null);
        deliveryResult(callback, request, context);
    }

    /**
     * 异步基于post的文件上传，单文件且携带其他form参数上传
     *
     * @param url
     * @param callback
     * @param file
     * @param fileKey
     * @param params
     * @throws IOException
     */
    private void _postAsyn(String url, String[] fileName, StringCallback callback, File file, String fileKey, Context context, Param... params) throws IOException {
        Request request = buildMultipartFormRequest(url, fileName, new File[]{file}, new String[]{fileKey}, params);
        deliveryResult(callback, request, context);
    }

    /**
     * 异步下载文件
     *
     * @param url
     * @param destFileDir 本地文件存储的文件夹
     * @param callback
     */
    public void _downloadAsyn(final String url, final String destFileDir, final StringCallback callback) {

        File file1 = new File(destFileDir);
        if (!file1.exists()) {
            file1.mkdirs();
        }
        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();
                    //如果下载文件成功，第一个参数为文件的绝对路径
                    sendSuccessStringCallback(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());
    }

    /**
     * 加载图片
     *
     * @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);
            }
        });
    }


    //*************对外公布的方法************


    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 String getAsString11(String url) throws IOException {
        return getInstance()._getAsString11(url);
    }

//    public static void getAsyn(String url, StringCallback 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 StringCallback callback, Param... params) {
//        getInstance()._postAsyn(url, callback, params);
//    }
//
//
//    public static void postAsyn(String url, final StringCallback callback, Map<String, String> params) {
//        getInstance()._postAsyn(url, callback, params);
//    }


    public static Response post(String url, String[] fileName, File[] files, String[] fileKeys, Param... params) throws IOException {
        return getInstance()._post(url, fileName, files, fileKeys, params);
    }

    public static Response post(String url, String[] fileName, File file, String fileKey) throws IOException {
        return getInstance()._post(url, fileName, file, fileKey);
    }

    public static Response post(String url, String[] fileName, File file, String fileKey, Param... params) throws IOException {
        return getInstance()._post(url, fileName, file, fileKey, params);
    }

//    public static void postAsyn(String url, String[] fileName, StringCallback callback, File[] files, String[] fileKeys, Param... params) throws IOException {
//        getInstance()._postAsyn(url, fileName, callback, files, fileKeys, params);
//    }


//    public static void postAsyn(String url, String[] fileName, StringCallback callback, File file, String fileKey) throws IOException {
//        getInstance()._postAsyn(url, fileName, callback, file, fileKey);
//    }
//
//
//    public static void postAsyn(String url, String[] fileName, StringCallback callback, File file, String fileKey, Param... params) throws IOException {
//        getInstance()._postAsyn(url, fileName, 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, StringCallback callback) {
        getInstance()._downloadAsyn(url, destDir, callback);
    }

    //****************************

    private Request buildMultipartFormRequestUp(String url, File[] files,
                                                String[] fileKeys, Param[] params) {
        params = validateParam(params);


        MultipartBuilder builder = new MultipartBuilder()
                .type(MultipartBuilder.FORM);


        for (int x = 0; x < files.length; x++) {
            builder.addFormDataPart("media", files[x].getName(), RequestBody.create(MediaType.parse("image/png"), files[x]));
        }

        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 根据文件名设置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 Request buildMultipartFormcookie(String url, String cookie, File[] files,
                                             String[] fileKeys, Param[] params) {
        params = validateParam(params);


        MultipartBuilder builder = new MultipartBuilder()
                .type(MultipartBuilder.FORM);

//<!--这两段是干啥的？-->
//        for (int x = 0; x < files.length; x++) {
//            builder.addFormDataPart("media", files[x].getName(), RequestBody.create(MediaType.parse("image/png"), files[x]));
//        }
//
//        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 根据文件名设置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)
                .addHeader("cookie", cookie)
                .build();
    }

    private Request buildMultipartFormRequest(String url, String[] fileNamey, 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 = fileNamey[i];
                fileBody = RequestBody.create(MediaType.parse(guessMimeType(fileName)), file);
                //TODO 根据文件名设置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 void deliveryResult(final StringCallback callback, final Request request, final Context context) {
        mOkHttpClient.setConnectTimeout(30, TimeUnit.SECONDS);//设置连接超时时间
        mOkHttpClient.setReadTimeout(30, TimeUnit.SECONDS);
        mOkHttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(final Request request, final IOException e) {

                sendFailedStringCallback(request, e, callback);
//
//                if (MyApplication.Isshow == 0) {
//                    MyApplication.Isshow = 1;
//                    if (getNetWorkInfo(context) != 1) {
//                        new Thread(new Runnable() {
//                            @Override
//                            public void run() {
//                                Looper.prepare();
//                                AlertDialog("连接超时请检查网络！请重新登录...", context);
//                                Looper.loop();//增加部分
//                            }
//                        }).start();
//
//                    }
//                }
            }

            @Override
            public void onResponse(final Response response) {
                try {
                    final String string = response.body().string();

                    sendSuccessStringCallback(string, callback);
                } catch (IOException e) {
                    sendFailedStringCallback(response.request(), e, callback);
                }
            }
        });
    }

    //  判断手机的网络状态（是否联网）
    public static int getNetWorkInfo(Context context) {
        //网络状态初始值
        int type = -1;  //-1(当前网络异常，没有联网)
        //通过上下文得到系统服务，参数为网络连接服务，返回网络连接的管理类
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        //通过网络管理类的实例得到联网日志的状态，返回联网日志的实例
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        //判断联网日志是否为空

        if (activeNetworkInfo == null) {
            //状态为空当前网络异常，没有联网
            return type;
        }
        //不为空得到使用的网络类型
        int type1 = activeNetworkInfo.getType();

        switch (type1) {
            case ConnectivityManager.TYPE_MOBILE:   //网络类型为运营商（移动/联通/电信）
                type = 0;
                break;
            case ConnectivityManager.TYPE_WIFI: //网络类型为WIFI（无线网）
                type = 1;
                break;
            default:
                type = -1;
                break;
        }
        //返回网络类型
        return type;
    }


    private void AlertDialog(final String strContent, final Context context) {
        LayoutInflater factory = LayoutInflater.from(context);
        View myView = factory.inflate(R.layout.exit_dialog, null);
        final Dialog dialog = new AlertDialog.Builder(context)
                .setView(myView).create();
        //设置点击Dialog外部任意区域关闭Dialog
        dialog.setCanceledOnTouchOutside(true);
        dialog.show();
        //设置弹窗在底部
        Window window = dialog.getWindow();
        window.setGravity(Gravity.CENTER);
        final Button btn_cancel = dialog.findViewById(R.id.btn_cancel);
        final Button btn_sure = dialog.findViewById(R.id.btn_sure);
        final TextView textView6 = dialog.findViewById(R.id.textView6);
        btn_cancel.setVisibility(View.GONE);
        textView6.setText(strContent);
        LinearLayout linear_edpass = dialog.findViewById(R.id.linear_edpass);
        final EditText edit_pass = dialog.findViewById(R.id.edit_pass);
        textView6.setVisibility(View.VISIBLE);
        linear_edpass.setVisibility(View.GONE);

        btn_sure.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
                VSGService.getInstance().logout(context, null);
                context.startActivity(new Intent(context, LoginActivity.class));
            }
        });
        btn_cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
    }


    private void sendFailedStringCallback(final Request request, final IOException e, final StringCallback callback) {
        mDelivery.post(new Runnable() {
            @Override
            public void run() {
                if (callback != null)
                    callback.onFailure(request, e);
            }
        });
    }

    private void sendSuccessStringCallback(final String string, final StringCallback callback) {
        mDelivery.post(new Runnable() {
            @Override
            public void run() {
                if (callback != null)
                    callback.onResponse(string);
            }
        });
    }

    private Request buildPostRequest(String url, Param[] params) {

        if (params == null) {
            params = new Param[0];
        }
        FormEncodingBuilder builder = new FormEncodingBuilder();
        for (Param param : params) {
            if (param.key != null && param.value != null) {
                builder.add(param.key, param.value);
            } else {
                builder.add("", "");
            }
        }
        RequestBody requestBody = builder.build();
        return new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();
    }


    private Request buildPostRequestCooike(String url, String cookie, Param[] params) {
        if (params == null) {
            params = new Param[0];
        }
        FormEncodingBuilder builder = new FormEncodingBuilder();
        for (Param param : params) {
            if (param.key != null && param.value != null) {
                builder.add(param.key, param.value);
            } else {
                builder.add("", "");
            }
        }
        RequestBody requestBody = builder.build();
        return new Request.Builder()
                .url(url)
                .post(requestBody)
                .addHeader("cookie", cookie)
                .build();
    }


    public interface StringCallback {
        void onFailure(Request request, IOException e);

        void onResponse(String response);
    }

    public static class Param implements Serializable {
        public Param() {
        }

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

        String key;
        String value;

        public String getKey() {
            return key;
        }

        public void setKey(String key) {
            this.key = key;
        }

        public String getValue() {
            return value;
        }

        public void setValue(String value) {
            this.value = value;
        }

    }

    public static String toStr(Param[] params) {
        String strParams = "";
        for (Param param : params) {
            strParams = strParams + "{" +
                    "key:'" + param.key + '\'' +
                    ", value:'" + param.value + '\'' +
                    "},";
        }
        return "[" + strParams + "]";
    }
}

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