在发送表单数据方面需要帮助（android）

Question

public class FilesUploadingTask2 extends AsyncTask<Void, Void, String> {

    // Конец строки
    private String lineEnd = "\r\n";
    // Два тире
    private String twoHyphens = "--";
    // Разделитель
    private String boundary =  "----WebKitFormBoundaryefkgxHeaEjv3FGL7";

    // Переменные для считывания файла в оперативную память
    private int bytesRead, bytesAvailable, bufferSize;
    private byte[] buffer;
    private int maxBufferSize = 1*1024*1024;

    // Путь к файлу в памяти устройства
    private String filePath;
    private JSONObject JsonToSend;
    // Адрес метода api для загрузки файла на сервер
    public final String API_FILES_UPLOADING_PATH = globalvariables.globURL + "/api/v1/shares/report/";

    // Ключ, под которым файл передается на сервер
    public static final String FORM_FILE_NAME = "photos";

    public FilesUploadingTask2(String filePath, JSONObject js) {
        this.filePath = filePath;
        this.JsonToSend = js;
    }
    public void addFormField(BufferedWriter dos, String parameter, String value){
        try {
            dos.write(twoHyphens + boundary + lineEnd);
            dos.write("Content-Disposition: form-data; name=\""+parameter+"\"" + lineEnd);
            dos.write("Content-Type: text/plain; charset=UTF-8" + lineEnd);
            dos.write(lineEnd);
            dos.write(value + lineEnd);
            dos.flush();
        }
        catch(Exception e){

        }
    }
    public void addFormField2(BufferedWriter dos, String parameter, int value){
        try {
            dos.write(twoHyphens + boundary + lineEnd);
            dos.write("Content-Disposition: form-data; name=\""+parameter+"\"" + lineEnd);
            dos.write("Content-Type: text/plain; charset=UTF-8" + lineEnd);
            dos.write(lineEnd);
            dos.write(value + lineEnd);
            dos.flush();
        }
        catch(Exception e){

        }
    }
    public void addFormField3(BufferedWriter dos, String parameter){
        try {
            dos.write(twoHyphens + boundary + lineEnd);
            dos.write("Content-Disposition: form-data; name=\""+parameter+"\"" + lineEnd);
            dos.write("Content-Type: text/plain; charset=UTF-8" + lineEnd);
            dos.write(lineEnd);
            dos.write(null + lineEnd);
            dos.flush();
        }
        catch(Exception e){

        }
    }
    @Override
    protected String doInBackground(Void... params) {
        // Результат выполнения запроса, полученный от сервера
        String result = null;

        try {
            // Создание ссылки для отправки файла
            URL uploadUrl = new URL(API_FILES_UPLOADING_PATH);

            // Создание соединения для отправки файла
            HttpURLConnection connection = (HttpURLConnection) uploadUrl.openConnection();

            // Разрешение ввода соединению
            connection.setDoInput(true);
            // Разрешение вывода соединению
            connection.setDoOutput(true);
            // Отключение кеширования
            connection.setUseCaches(false);

            // Задание запросу типа POST
            connection.setRequestMethod("POST");

            // Задание необходимых свойств запросу
            connection.setRequestProperty("Authorization", "token " + globalvariables.ClientToken);
            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
            connection.setRequestProperty("Accept","application/json");

            // Создание потока для записи в соединение
            DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
            BufferedWriter outputStream2 = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            JSONObject Test = new JSONObject();
            Log.d("gogogo", JsonToSend.toString());
            try {
                Test.put("product", 1514);
                Test.put("price", 1514);
                Test.put("quantity", 131);
                Test.put("measure", 0);
                Test.put("productData", JsonToSend.toString());
            } catch (JSONException e) {
                Log.e("MYAPP", "unexpected JSON exception", e);
            }



            // Начало контента
            outputStream.writeBytes(twoHyphens + boundary + lineEnd);
            // Заголовок элемента формы
            outputStream.writeBytes("Content-Disposition: form-data; name=\"" +
                    FORM_FILE_NAME + "\"; filename=\"" + filePath + "\"" + lineEnd);
            // Тип данных элемента формы
            outputStream.writeBytes("Content-Type: image/jpeg" + lineEnd);
            // Конец заголовка
            outputStream.writeBytes(lineEnd);
            // Поток для считывания файла в оперативную память
            FileInputStream fileInputStream = new FileInputStream(new File(filePath));

            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            buffer = new byte[bufferSize];

            // Считывание файла в оперативную память и запись его в соединение
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);

            while (bytesRead > 0) {
                outputStream.write(buffer, 0, bufferSize);
                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            }

            // Конец элемента формы
            outputStream.writeBytes(lineEnd);
            outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

            // Получение ответа от сервера
            int serverResponseCode = connection.getResponseCode();

            // Закрытие соединений и потоков
            fileInputStream.close();
            outputStream.flush();
            outputStream.close();
            addFormField(outputStream2, "products", Test.toString());
            addFormField3(outputStream2, "report_date");
            addFormField3(outputStream2, "report_sum");
            addFormField2(outputStream2, "check_number", 3333);
            addFormField2(outputStream2, "report_sum", 4444);;
            Log.i("STATUS", String.valueOf(connection.getResponseCode()));
            Log.i("MSG" , connection.getRequestMethod());
            // Считка ответа от сервера в зависимости от успеха
            if(serverResponseCode == 201) {
                result = readStream(connection.getInputStream());
            } else {
                result = readStream(connection.getErrorStream());
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return result;
    }

    // Считка потока в строку
    public String readStream(InputStream inputStream) throws IOException {
        StringBuffer buffer = new StringBuffer();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

        String line;
        while ((line = reader.readLine()) != null) {
            buffer.append(line);
        }

        return buffer.toString();
    }
}

{photos:[],product:[],report_date:null,report_sum:null,check_number:“”,qr_img:null,qr_link:“”}

旧表单-数据表单：

------WebKitFormBoundaryEFKGXHEAEJV3FGL7内容-配置：表单-数据；name=“report_date”2018-08-17t12:00:00.000z------WebKitFormBoundaryEFKGXHEAEJV3FGL7内容-处置：表单-数据；name=“照片”；filename=“公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民name=“照片”；filename=“公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民公民name=“照片”；filename=“collage.jpg”content-type：image/jpeg------WebKitFormBoundaryeFKGXHEAEJV3FGL7 content-disposition：form-data；name=“照片”；filename=“gatsby.jpg”content-type：image/jpeg------WebKitFormBoundaryeFKGXHEAEJV3FGL7 content-disposition：form-data；name=“产品”{“产品”：11292,“价格”：0,“数量”：“12”,“措施”：10,“产品数据”：{“ID”：11292,“标题”：“贝里尼多PG 0275️300(1-️️))”,“Full_Title”：“Brand_Title”：“”Collect_Title“：”Bellini“,”Slug“：”Bellini-Multi-PG-02-75KH300-1-I-Sort“,”Image“：NULL,”Brand“：NULL,”Collection“：1844,”Category“：”Collection“：”：23,“条形码”：“010400000177”,“价格”：“0.00”,“度量”：10,“度量_display”：“χ~.”,“组”：“”}}----WebKitFormBoundaryEFKGXHEAEJV3FGL7内容-处置：表单-数据；name=“report_sum”44440------webkitformboundaryefkgxheaejv3fgl7 content-disposition:form-data；name=“check_number”33333------WebKitFormBoundaryEFKGXHEAEJV3FGL7--

我将非常感谢你的帮助，我已经整理了很长时间，但还是没有成功。（我为语言知识的贫乏而道歉。）

Answer 1

使用HTTPurlConnection和FormData/MultiPart一起使用可能比较棘手，或者需要很多行双板代码。尝试使用网络库，如retrofit或okhttp，它们提供了简单的代码和更多的好处。

使用okhttp：-

首先在gradle中添加依赖项：-

compile 'com.squareup.okhttp3:okhttp:3.11.0'

OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new MultipartBody.Builder()
    .setType(MultipartBody.FORM)
    .addFormDataPart("somParam", "someValue")
    .build();

Request request = new Request.Builder()
    .url(BASE_URL + route)
    .post(requestBody)
    .build();


 //synchrounous call
  Response response = client.newCall(request).execute();