Create File object of dropbox excel file link

Hi, I have an app that have already the DbxChooser Class.

I have also this code:

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == DBX_CHOOSER_REQUEST) {
        if (resultCode == Activity.RESULT_OK) {

            // Handle the result
            DbxChooser.Result result = new DbxChooser.Result(data);
            Log.d("TAG", "Link to selected file: " + result.getLink());

I can see on Logcat the full dropbox link and if I paste it on chrome I can download the file automatically. I want to download this link to a Jave File Obeject because after that I have a method thate receive "File" object (Excel file) and read the excel file. I tried to implement a DownloadFileTask but I could not make it.

How can I download the excel file from a link to a File object ?

I have also the DropboxClientFactory class ready:

package com.tkdcenter.StudentsListFromExcel;

/**
 * Created by Alex on 18/9/2018.
 */

import com.dropbox.core.DbxRequestConfig;
import com.dropbox.core.http.OkHttp3Requestor;
import com.dropbox.core.v2.DbxClientV2;

public class DropboxClientFactory {

    public static DbxClientV2 getClient(String ACCESS_TOKEN) {
        // Create Dropbox client
        DbxRequestConfig requestConfig = DbxRequestConfig.newBuilder("Flashcard Maker")
                .withHttpRequestor(new OkHttp3Requestor(OkHttp3Requestor.defaultOkHttpClient()))
                .build();
        DbxClientV2 client = new DbxClientV2(requestConfig, ACCESS_TOKEN);
        return client;
    }
}