Kotlin learning apply plugin: 'kotlin Android extensions‘

In the main build.gradle Of plugins add to Control can be used directly id assignment 、 operation

plugins {
    
    id 'kotlin-android-extensions'
}

textView.text="hello world"

class MainActivity : AppCompatActivity() {
    
    override fun onCreate(savedInstanceState: Bundle?) {
    
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        textView.text="hello world"
    }
}