Classes cannot be accessed from outside package

Question

I have two packages. The class I want to import from the first package is declared as PUBLIC. Despite, when I test a file from the second package it shows me compilation err

Answer 1

closeDrawers(boolean) is not public in android.support.v4.widget.DrawerLayout. Cannot be accessed from outside package

@Override
public void onBackPressed() {
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
       super.onBackPressed();
    }
}