在Android中实现视图绑定的问题

android {
    ...
    dataBinding {
        enabled = true
    }
}

<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="text"
            type="String" />
    </data>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@{text}" />
</layout>

ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
binding.setText("Hello, World!");