package com.tuya.appsdk.sample.viettelhome import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import androidx.navigation.NavController import androidx.navigation.fragment.NavHostFragment import com.tuya.appsdk.sample.R class MainActivity : AppCompatActivity() { private lateinit var navController: NavController override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val navHostFragment = supportFragmentManager .findFragmentById(R.id.fragmentContainerView) as NavHostFragment navController = navHostFragment.navController } }