Create a button programmatically in a fragment using Kotlin

Question

I wish to generate a column of buttons inside a fragment in Kotlin from a database. For now I tried with just one button, but I cannot seem to do it without hardcoding it in the XML file. Here is my code so far:

class NotesFragment() : Fragment() {


    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {

        val view: View = inflater!!.inflate(R.layout.fragment_notes, container, false)
        //val root : ViewGroup = inflater.inflate(R.layout.fragment_notes, null) as ViewGroup

        val button_Id: Int = 1111
        val button = Button((activity as MainActivity?)!!)
        button.setText("Button 4 added dynamically")
        button.setLayoutParams(ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT))
        button.setId(button_Id)
        button.x = 250f
        button.y = 500f
        button.setOnClickListener(this)
        view.add(button)

        return view
    }
}

I know I should probably look for the layout somewhere in this and do an addView with it... What is the next step?

you can directly get rootview from fragment xml and add into it using addView — Abhay Koradiya
– Abhay Koradiya, Commented Apr 4, 2022 at 4:53
You should create xml file for button and then add then whenever you want in your fragment. — Karan Mehta
– Karan Mehta, Commented Apr 4, 2022 at 5:01
Yes and don't forget to specify a different button id for each btn, if you will inflate from xml. Just call button.setId(View.generateViewId()) — Vít Kapitola
– Vít Kapitola, Commented Apr 4, 2022 at 8:21

propre_poli · Accepted Answer · 2022-04-05 03:39:18Z

0

I did it like this

view.rootView.findViewById<RelativeLayout>(R.id.button_container).addView(button)

answered Apr 5, 2022 at 3:39

propre_poli

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