Change TextView text from Bundle Fragment-CodePudding

I have a fragment manager that I created, on my main activity as below

supportFragmentManager.beginTransaction().replace(R.id.fragment1, ProduceFragment.newInstance("Title")).commit()

and new Instance function that saves the title on bundle

from different file (Produce.kt) as below

fun newInstance(title: String): ProduceFragment {
            val frag = ProduceFragment()
            val bundle = Bundle()
            bundle.putString(titleKey, title)
            Log.d("XXX", "title $title")
            return frag }

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val text =savedInstanceState?.getBundle(titleKey)
        binding.title.text = text.toString()

I see the title on Log.d but I kept getting null. How do I use the bundle to change my title.text?

CodePudding user response：

In your code, you are only creating the bundle but not using it anywhere. You need to attach that bundle to the fragment.

fun newInstance(title: String): ProduceFragment {
    val frag = ProduceFragment()
    val bundle = Bundle()
    bundle.putString(titleKey, title)
    frag.arguments = bundle
    return frag
}

And to retrieve this title value, you can use:

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    val text = arguments?.getString(titleKey)
    binding.title.text = text.toString()