@Override
public void onBackPressed() {
if (mNavController.getCurrentStack().size() > 1) {
mNavController.pop();
} else {
super.onBackPressed();
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// Necessary to restore the BottomBar's state, otherwise we would
// lose the current tab on orientation change.
mBottomBar.onSaveInstanceState(outState);
mNavController.onSaveInstanceState(outState);
}
@Override
public void pushFragment(Fragment fragment) {
mNavController.push(fragment);
}