在底部导航视图上重新创建活动

Question

在选定的底部导航视图项上重新创建了活动

private BottomNavigationView.OnNavigationItemSelectedListener navlistner =
        new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()) {
                    case R.id.na_home:
                        Intent a = new Intent(MainActivity.this,MainActivity.class);
                        startActivity(a);
                        break;
                }
                return true;

            }
        };