Question

基本上，我使用multipart/form-data和retrofit2一次将多张图片上传到服务器。但是奇怪的是，即使在压缩了图像大小之后，为什么要将它们上传到服务器也要花很长时间。意味着上传26 seconds的10张图片几乎要花938 kb。服务器的上传速度很好，因为当我上传2或3张照片时，它们的上传速度如此之快，但我不明白为什么会发生这种情况。所以，我应该一张一张地上传照片吗？我要解决这个问题吗？

接口：

public interface FileUploadService {  
@Multipart
@POST("upload")
Call<ResponseBody> uploadMultipleFiles(
        @Part("description") RequestBody description,
        @Part MultipartBody.Part file1,
        @Part MultipartBody.Part file2);

}

上传课程：

@NonNull
private RequestBody createPartFromString(String descriptionString) {  
return RequestBody.create(
        okhttp3.MultipartBody.FORM, descriptionString);
 }

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

File file = FileUtils.getFile(this, fileUri);

// creating RequestBody instance from file
RequestBody requestFile =
    RequestBody.create(
        MediaType.parse(getContentResolver().getType(fileUri)), 
        file
    );

  // MultipartBody.Part is used to send also the actual file name
  return MultipartBody.Part.createFormData(partName, file.getName(), 
requestFile);
} 

public void upload(){
Uri file1Uri = ... // get it from a file chooser or a camera intent  
Uri file2Uri = ... // get it from a file chooser or a camera intent

// create upload service client
FileUploadService service =  
    ServiceGenerator.createService(FileUploadService.class);

// create part for file (photo, video, ...)
MultipartBody.Part body1 = prepareFilePart("video", file1Uri);  
MultipartBody.Part body2 = prepareFilePart("thumbnail", file2Uri);

// adding another part within the multipart request
RequestBody description = createPartFromString("hello, this is description 
speaking");

// finally, execute the request
Call<ResponseBody> call = service.uploadMultipleFiles(description, body1, 
body2);  
call.enqueue(new Callback<ResponseBody>() {  
@Override
public void onResponse(Call<ResponseBody> call,
        Response<ResponseBody> response) {
    Log.v("Upload", "success");
}

@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
    Log.e("Upload error:", t.getMessage());
}
});
}

图像上传速度缓慢

0 个答案: