Kotlin 使用导航组件在不同的图形之间导航

我有两个活动，一个保存登录过程的所有片段，另一个保存主应用程序的所有片段.

Let's say I want to navigate from Activity1 (that holds all navigation graph of Login) to Activity2 (That holds all the navigation graph for the main app)

  class LoginActivity : AppCompatActivity() {
    
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            setContentView(R.layout.activity_login)
        }
    
        fun goToMainActivity(){
            startActivity(Intent(this,MainActivity::class.java))
            finish()
        }
    }

这里我称之为goToMainActivity()方法

 class LoginFragment : Fragment() {
    
        override fun onCreateView(
            inflater: LayoutInflater,
            container: ViewGroup?,
            savedInstanceState: Bundle?
        ): View? {
            return inflater.inflate(R.layout.fragment_login,container,false)
        }
    
        override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
            super.onViewCreated(view, savedInstanceState)
    
            btn_go.setOnClickListener {
                // call the method goToMainActivity() to kill all fragments contained by that Activity and move foward to MainActivity with another nav_graph
            }
        }
    }

Since LoginActivity holds a nav_graph and is the navigation host for all the Login Fragments, now I want to kill all the fragments contained to LoginActivity and move towards a new Activity (MainActivity) that holds a different nav graph

这是做这件事的好方法吗？或者我应该用不同的方式导航？