如何在kotlin中解析findviewbyid？

apply plugin: 'kotlin-android-extensions'

<TextView
    android:id="@+id/myTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World!" />

import kotlinx.android.synthetic.main.activity_main.*

// 在Activity中
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // 使用findViewById解析TextView
        val textView = findViewById<TextView>(R.id.myTextView)
        textView.text = "Hello Kotlin!"

        // 使用扩展函数解析TextView
        myTextView.text = "Hello Kotlin with Extensions!"
    }
}

// 在Fragment中
class MyFragment : Fragment() {
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val view = inflater.inflate(R.layout.fragment_my, container, false)

        // 使用findViewById解析TextView
        val textView = view.findViewById<TextView>(R.id.myTextView)
        textView.text = "Hello Kotlin!"

        // 使用扩展函数解析TextView
        view.myTextView.text = "Hello Kotlin with Extensions!"

        return view
    }
}