当我已经在Kotlin中使用了具有不同布局的setContentView()时，我如何将谷歌广告加载到onCreate()函数中的片段？

import com.google.android.gms.ads.AdRequest
import com.google.android.gms.ads.AdView

class MainActivity : AppCompatActivity() {

    private lateinit var adView: AdView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // 创建一个片段容器
        val fragmentContainer = findViewById<FrameLayout>(R.id.fragment_container)

        // 创建一个广告片段实例
        adView = AdView(this)
        adView.adUnitId = "your_ad_unit_id"
        adView.adSize = AdSize.BANNER

        // 将广告片段添加到片段容器中
        val fragmentManager = supportFragmentManager
        val fragmentTransaction = fragmentManager.beginTransaction()
        fragmentTransaction.add(fragmentContainer.id, adView)
        fragmentTransaction.commit()

        // 加载广告
        val adRequest = AdRequest.Builder().build()
        adView.loadAd(adRequest)
    }
}