无法使用Retrofit 2上传图像

// 1. 添加依赖库
implementation 'com.squareup.retrofit2:retrofit:2.x.x'
implementation 'com.squareup.retrofit2:converter-gson:2.x.x'
implementation 'com.squareup.okhttp3:okhttp:4.x.x'

// 2. 创建网络请求接口
public interface ApiService {
    @Multipart
    @POST("upload")
    Call<ResponseBody> uploadImage(@Part MultipartBody.Part image);
}

// 3. 创建Retrofit实例
OkHttpClient client = new OkHttpClient.Builder().build();
Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("https://example.com/api/") // 替换为实际的上传URL
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build();

// 4. 创建请求体
File imageFile = new File("path/to/image.jpg");
RequestBody requestBody = RequestBody.create(MediaType.parse("image/*"), imageFile);
MultipartBody.Part imagePart = MultipartBody.Part.createFormData("image", imageFile.getName(), requestBody);

// 5. 创建网络请求
ApiService apiService = retrofit.create(ApiService.class);
Call<ResponseBody> call = apiService.uploadImage(imagePart);

// 6. 执行图像上传
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
        if (response.isSuccessful()) {
            // 处理上传成功的情况
        } else {
            // 处理上传失败的情况
        }
    }

    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
        // 处理网络请求失败的情况
    }
});