Android : How to use dropbox with libgdx?

I have been searching for awhile but cannot find solution to my problem. I'm really beginner so please correct me if I have made a mistake.

While following instructions described in this link:

https://www.dropbox.com/developers/sync/start/android

mDbxAcctMgr = DbxAccountManager.getInstance(getApplicationContext(), APP_KEY, APP_SECRET);

I can't fix the error on getApplicationContext(). I figured out that I have to extend Activity but since I'm using libGDX I searched up and figured out that getApplicationContext() is the same as getContext() in

import com.badlogic.gdx.backends.android.AndroidApplication;

however... I can't import this. I don't have it in my library? eclipse tells me to create a new class. How do I import this? I've used lastest nightly build to create my project.

Please help me!

Thanks!