Which binding is better to use?

Question

Android

import kotlinx.android.synthetic.main.fragment_main.*
textViewNumber.text = "10"

Or

val binding = DataBindingUtil.inflate(
            inflater, R.layout.fragment_main, container, false)
binding.number = "10"

<data>
        <variable
            name="number"
            type="String" />
    </data>