// init once
Rl.init(context);
// debug mode
Rl.debug(true);
// put
Rl.put("remote path", "local path", true);
// get without checking local file and redownload
Rl.get("remote path");
// get with checking local file and redownload
Rl.get("remote path", new IRlStrict() {
    @Override
    public void get(String path) {

    }
});
// work in with Glide
Glide.with(context).load(Rl.get("picture path")).into(imageView);

public class YourDownloader extends RlDownloader {

  private IRlStrict strict;

    @Override
    public void start(String remote, IRlStrict strict) {
        this.strict = strict;
        // asynchronization code
        strict.get(finished_path);
    }

    @Override
    public void cancel() {
        // cancel download resource
    }
}
// call setter
Rl.downloader(YourDownloader.class);

public class YourUploader extends RlUploader {
    @Override
    public void upload(String remote, String local, RlUploaderStater stater) {
        // synchronizing upload (because IntentService is used to upload files queue)
        // upload succeed
        stater.done();
        // upload failed
        stater.undone();
    }
}
// call setter
Rl.uploader(YourUploader.class);
// select a time call (start upload files queue)
Rl.uploading();