如何在Retrofit Android中随文件一起发送数据

// 步骤2：创建Retrofit实例
Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .build();

// 步骤3：创建API接口
interface ApiService {
    @Multipart
    @POST("upload")
    Call<ResponseBody> uploadFile(
        @Part MultipartBody.Part file,
        @Part("description") RequestBody description
    );
}

// 步骤4：定义请求参数
File file = new File("path/to/file");
RequestBody fileRequestBody = RequestBody.create(MediaType.parse("multipart/form-data"), file);
MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), fileRequestBody);
RequestBody description = RequestBody.create(MediaType.parse("text/plain"), "File description");

// 步骤5：发送请求
ApiService apiService = retrofit.create(ApiService.class);
Call<ResponseBody> call = apiService.uploadFile(filePart, description);
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
        // 处理响应结果
    }

    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
        // 处理请求失败
    }
});