How to hide NavigationIcon on toolbar

This is working fine with me:

getSupportActionBar().setDisplayHomeAsUpEnabled(false);

hope it helps somebody

Try setting the NavigationIcon to null while getting back to activity.

Activity.toolbar.setNavigationOnClickListener(new View.OnClickListener( {
    @Override
    public void onClick(View view) {
        Activity.fragmentManager.popBackStack();
        Activity.toolbar.setTitle("Activity");
        Activity.toolbar.setNavigationIcon(null);
    }
});