设置成false即可

 viewPager2.setCurrentItem(0,false);

    @Override
    public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
    
    
        switch (checkedId) {
    
    
            case R.id.rb_home:
                Log.w("wy", "rb_home: ");
                viewPager2.setCurrentItem(0,false);
                break;
            case R.id.rb_msg:
                Log.w("wy", "rb_msg: ");
                if (Constant.nickName.equals("未登录") || Constant.nickName.equals("no login")) {
    
    
                    Toast.makeText(x.app(), R.string.Please_login_first, Toast.LENGTH_SHORT).show();
                    startActivity(new Intent(MainActivity.this, LoginActivity.class));
                    finish();
                    return;
                }
                viewPager2.setCurrentItem(1,false);
                break;
            case R.id.rb_cbdt:
                Log.w("wy", "rb_cbdt: ");
                viewPager2.setCurrentItem(2,false);
                break;
            case R.id.rg_my:
                Log.w("wy", "rg_my: ");
                viewPager2.setCurrentItem(3,false);
                break;
        }
    }