如何使用Android和php中的Retrofit 2作为后端上传带有图像的多零件数据？

Question

我正在从事一项活动，其中用户输入一些数据（整数和字符串值）并从图库中选择多个图像。 整个数据应发布在一个请求中，我使用的是php作为后端。 我收到响应失败。

这是我在Api.interface中拥有的接口方法...

 @Multipart
@POST("AddKhataSale")
Call<Reciever> SaverPost(@Part("city") String City, @Part("party") String Client,
                         @Part("image_count")  Integer ImageCount, @Part("bill_total") Integer BillTotal,
                         @Part("bill_date") String BillDate, @Part List<MultipartBody.Part> parts
);

从“活动”结果中获取图库中的所有图像

 @Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    try {

        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK
                && null != data) {


            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            imagesEncodedList = new ArrayList<String>();
            if(data.getData()!=null){

                Uri mImageUri=data.getData();


                Cursor cursor = getContentResolver().query(mImageUri,
                        filePathColumn, null, null, null);

                cursor.moveToFirst();

                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                imageEncoded  = cursor.getString(columnIndex);
                cursor.close();

            } else {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
                    if (data.getClipData() != null) {
                        ClipData mClipData = data.getClipData();
                         mArrayUri = new ArrayList<Uri>();


                            ImageCount = mClipData.getItemCount();
                        for (int i = 0; i < mClipData.getItemCount(); i++) {

                            ClipData.Item item = mClipData.getItemAt(i);
                             uri = item.getUri();

                            files[i] =new File(String.valueOf(uri));

                            mArrayUri.add(uri);
                            Cursor cursor = getContentResolver().query(uri, filePathColumn, null, null, null);

                            cursor.moveToFirst();

                            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                            imageEncoded = cursor.getString(columnIndex);
                            imagesEncodedList.add(imageEncoded);
                            cursor.close();

                        }
                        Log.v("LOG_TAG", "Selected Images" + mArrayUri.size());
                        Toast.makeText(this,"Selected Images :"+mArrayUri.size(),Toast.LENGTH_SHORT).show();
                    }
                }
            }
        } else {
            Toast.makeText(this, "You haven't picked Image",
                    Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
                .show();
    }

    super.onActivityResult(requestCode, resultCode, data);
}

在mArrayUri（Arraylist）中，我添加了图像的uri，s。

在按钮上载时，我已调用方法SendKhata（）。

public void SendKhata()
{
    try {
        BillTotal = Integer.valueOf(billamount.getText().toString());
    }
    catch (Exception e)
    {

        Toast.makeText(this,"BillAmount must be Integer ",Toast.LENGTH_SHORT).show();
    }
    try {
        BillDate = billdate.getText().toString();
    }
    catch (Exception e)
    {

        Toast.makeText(this,"BillAmount must be Integer ",Toast.LENGTH_SHORT).show();
    }
    ApiInterface = ApiClient.getApiClient().create(Api.class);
List<MultipartBody.Part> parts = new ArrayList<>();

    for (int i=0; i < mArrayUri.size(); i++){
        parts.add(prepareFilePart("image"+i+"", mArrayUri.get(i)));
        }
//geting CityId,ClientName,ImageCount,BillTotal and BillDate here with no issues...
       Call<Reciever> call = ApiInterface.SaverPost(CityID, selected_Client_Name, ImageCount, BillTotal, BillDate,
               parts);
        call.enqueue(new Callback<Reciever>() {
            @Override
            public void onResponse(Call<Reciever> call, Response<Reciever> response) {
                if (response.isSuccessful()) {
                    Toast.makeText(EzKhataActivity.this, response.body().getCode() + " " + response.body().getMsg().toString()
                            , Toast.LENGTH_LONG).show();
                    Log.e("response:", "response successful");
                }
            }

            @Override
            public void onFailure(Call<Reciever> call, Throwable t) {
                Log.e("response:", "response failiure");
            }
        });

}

private MultipartBody.Part prepareFilePart(String partName, Uri fileUri){

    File file = new File(fileUri.getPath());

    RequestBody requestBody = RequestBody.create(MediaType.parse(getContentResolver().getType(uri)), file);

    return MultipartBody.Part.createFormData(partName, file.getName(),requestBody);
}

这是代码的php部分。

function AddKhataSale()
{
    // params: city, client, no of images, images, total bill, bill date, 
    $CityId = $this->input->post('city');
    $ClientId = $this->input->post('client');
    $ImageCount = $this->input->post('image_count');
    $BillTotal = $this->input->post('bill_total');
    $BillDate = $this->input->post('bill_date');
    $error = array();
    for($i=0; $i<$ImageCount; $i++)
    {
        $FileName = $_FILES['image'.$i]['name'];
        $FileTmp = $_FILES['image'.$i]['tmp_name'];
        $FileType = $_FILES['image'.$i]['type'];

            // die(__DIR__.'/../../uploads/');
        $dp = getcwd().DIRECTORY_SEPARATOR;
        $target_path = $dp . "aan/client_bills/".basename($FileName);
        if(@move_uploaded_file($FileTmp, $target_path))
        {
            // echo "ok";
        }
        else
        {
            array_push($error, $FileName);    
        }


    }
    // echo $ImageCount;
    if(count($error) > 0)
    {
        echo json_encode(array('code'=>'0', 'msg'=>$error));
    }
    else
    {
        echo json_encode(array('code'=>'1', 'msg'=>'successfully uploaded'));
    }

}