Java – Dropbox SDK for Android: androidauthsession not found

I'm trying to follow Drop@R_ 419_ 2419 @ tutorials on the website will drop@R_ 419_ 2419 @ integrated into my android project. I referenced all libraries in the SDK / LIBS path to my project preferences by "adding external jars". But I got one

This declaration

private Drop@R_419_2419@API<AndroidAuthSession> mDBApi;

Error, I don't know why. These are project imports automatically completed by using CMD shift O command:

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.drop@R_419_2419@.client2.Drop@R_419_2419@API;
import com.drop@R_419_2419@.client2.session.Session.AccessType;

What did I miss?

Editor: My Library:

resolvent:

I'm a little embarrassed, but the problem is drop@R_ 419_ 2419 @ - wrong import of Java library instead of correct drop@R_ 419_ 2419 @ - Android library!