改造：在 POST @body 中上传图片

Question

经过数小时的搜索和尝试不同的解决方案后，我放弃了，我正在寻求一些指导，如果可能的话，提供一些示例。这是问题所在：我有一个具有图片属性的类。我正在使用 Retrofit，我想将图像作为 HTTP POST 正文的一部分发送，但我收到了一个错误。下面是代码和错误。

提前感谢您的帮助。

POJO 类：

public class Class1 {

@SerializedName("Picture")
private Bitmap mPicture;

@SerializedName("Giver")
public Integer mGiver;

public String getPicture() {
    return mPicture;
}

public void setPicture (Bitmap picture) {
    this.mPicture = picture;
}

public String getLaboratory() {
    return mLaboratory;
}

public void setLaboratory(String laboratory) {
    this.mLaboratory = laboratory;
}

活动：

    mClass1.setPicture(mImageBitmap);
    mClass1DAO.insertClass1(mClass1, new Callback<Integer>() {
        @Override
        public void success(Integer uid, Response response) {
            mClass1.setUID(uid);
            progressDialog.dismiss();
            Toast.makeText(getApplicationContext(), R.string.msgThankYou, Toast.LENGTH_LONG).show();
            dispatchNavigationDrawerActivity();
        }

        @Override
        public void failure(RetrofitError error) {
            progressDialog.dismiss();
            showErrorDialog(error.getLocalizedMessage());
        }
    });

API

@POST("/Service.svc/Insert")
void insert(@Body Class1 class1, Callback<Integer> cb);

c#中的WebService

    [OperationContract]
    [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.Bare, RequestFormat = WebMessageFormat.Json,
    ResponseFormat = WebMessageFormat.Json, UriTemplate = "InsertMedicineToDonate")]
    Int32 insertMedicineToDonate(MedicineToDonate medicineToDonate);

    //insertMedicineToDonate
    public Int32 insertMedicineToDonate(MedicineToDonate medicineToDonate)
    {
        UserService mUserService = new UserService();

        if (mUserService.isUserAuthorized())
        {
            return this.insertMedicineToDonateAuth(medicineToDonate);

        }
        else
        {
            errorDetail = new CustomHttpError(003);
            throw new WebFaultException<CustomHttpError>(errorDetail, HttpStatusCode.Forbidden);
        }

    }

Web 服务 POJO 类

    namespace DoarMed
{
    [DataContract]
    public class MedicineToDonate
    {
        [DataMember]
        public Int32 UID { get; set; }
        [DataMember]
        public Bitmap Picture { get; set; }

错误

在调试中打开类查看属性都正确但图片错误。

请看下面的图片信息：

-       Picture {System.Drawing.Bitmap} System.Drawing.Bitmap
+       Flags   '((System.Drawing.Image)(medicineToDonate.Picture)).Flags' threw an exception of type 'System.ArgumentException'    int {System.ArgumentException}
+       FrameDimensionsList '((System.Drawing.Image)(medicineToDonate.Picture)).FrameDimensionsList' threw an exception of type 'System.ArgumentException'  System.Guid[] {System.ArgumentException}
+       Height  '((System.Drawing.Image)(medicineToDonate.Picture)).Height' threw an exception of type 'System.ArgumentException'   int {System.ArgumentException}

等等

当我尝试将图片保存到数据库时，代码会抛出 System.ArgumentException

我在这里错过了什么？

提前谢谢你

Answer 1

这是解决方案，经过 3 天的尝试。我希望它可以节省您的时间。如果它确实节省了您的时间，请给我 +1。

客户端安卓

类

public class MedicineToDonate {
@SerializedName("Picture")
private String mPicture;
@SerializedName("DateTimeInsert")
public Long mDateTimeInsert;

public Bitmap getPicture() {
    return Global.convertStringToBitmap(mPicture);
}

public void setPicture(Bitmap picture) {
    this.mPicture = Global.convertBitmapToString(picture);
}

改造

    mMedicineToDonateDAO.getGiverAllMedicineToDonate(mGlobal.getUserUID(), new Callback<List<MedicineToDonate>>() {
        @Override
        public void success(List<MedicineToDonate> mMedicineToDonateList, Response response) {
            if (mMedicineToDonateList != null) {
                for (int i = 1; i <= mMedicineToDonateList.size(); i++) {
                    mMedicineToDonate = mMedicineToDonateList.get(i - 1);
                    mAdapter.add(mMedicineToDonate);
                }
            }
            progressDialog.dismiss();
            Fragment mFragment = mFragmentManager.findFragmentByTag(Global.OPTION_DONATE);
            FragmentTransaction ft = mFragmentManager.beginTransaction();
            ft.detach(mFragment)
                    .attach(mFragment)
                    .commit();
            mFragmentManager.executePendingTransactions();
        }

        @Override
        public void failure(RetrofitError error) {
            progressDialog.dismiss();
            showErrorDialog(error.getLocalizedMessage());
        }
    });

全球

    public static String convertBitmapToString(Bitmap imageBitmap){
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    if(imageBitmap != null) {
        imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
        byte[] byteArray = stream.toByteArray();
        return Base64.encodeToString(byteArray, Base64.URL_SAFE);
    }else{
        return null;
    }
}

public static Bitmap convertStringToBitmap (String encodedString) {
    try {
        byte[] data = Base64.decode(encodedString, Base64.URL_SAFE);
        return BitmapFactory.decodeByteArray(data, 0, data.length);
    } catch(Exception e) {
        e.getMessage();
        return null;
    }
}

服务器端 (C#/IIS/Postgresql)

Class
    [DataContract]
    public class MedicineToDonate
    {
    [DataMember]
    public string Picture { get; set; }
    [DataMember]
    public Int64 DateTimeInsert { get; set; }
    [DataMember]

INSERT:
            NpgsqlParameter addPictureParameter = new NpgsqlParameter("@" + Global.MEDICINETODONATE_COL_picture, NpgsqlDbType.Bytea);
        byte[] byteArrayPicture = Global.convertStringToByteArray(medicineToDonate.Picture);
        addPictureParameter.Value = byteArrayPicture;

SELECT:
        byte [] pictureByteArray = (byte[]) reader[12];
mMedicineToDonate.Picture = Global.convertByteArrayToString(pictureByteArray);

全球

    public static string convertByteArrayToString(byte[] bytes)
    {
        char[] chars = new char[bytes.Length / sizeof(char)];
        System.Buffer.BlockCopy(bytes, 0, chars, 0, bytes.Length);
        return new string(chars);
    }