android - issue in eclipse start-up -

android - issue in eclipse start-up -

when create new project, default test written:

public class testactivity extends activity { @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); }

}

but since yesterday, in setcontentview, gives me error on r, when import it, shows me error main.. main name of layout in res folder. should do? updated eclipse didnt work.

android eclipse