XUtils3下载文件

  public Callback.Cancelable DonwloadFile(String url, File downloadFile, DownloadCallback callback) {
        RequestParams params = new RequestParams(url);
        params.setAutoRename(false);
        params.setAutoResume(true);
        params.setMaxRetryCount(3);
        params.setCancelFast(true);
        params.setSaveFilePath(downloadFile.getAbsolutePath());
        Callback.Cancelable cancelable = x.http().get(params, callback);
        return cancelable;
    }
public class DownloadCallback implements Callback.CommonCallback  {}