Edistynyt mobiiliohjelmointi, 21.3.2023
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DataFragmentin ulkoasu res -> layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".DataFragment">

    <Button
        android:id="@+id/button_navigate_detail"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="CHANGE FRAGMENT" />

</LinearLayout>


DataFragment.kt:

class DataFragment : Fragment() {
    private var _binding: FragmentDataBinding? = null
    // This property is only valid between onCreateView and
    // onDestroyView.
    private val binding get() = _binding!!
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        _binding = FragmentDataBinding.inflate(inflater, container, false)
        val root: View = binding.root


        // navigate to another fragment, pass some parameter too

        return root
    }
    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }
}

DetailFragment.kt:

class DetailFragment : Fragment() {
    private var _binding: FragmentDetailBinding? = null

    // get fragment parameters from previous fragment
    val args: DetailFragmentArgs by navArgs()

    // This property is only valid between onCreateView and
    // onDestroyView.
    private val binding get() = _binding!!
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        _binding = FragmentDetailBinding.inflate(inflater, container, false)
        val root: View = binding.root

        // print out the given parameter into logs
        Log.d("TESTI", "Parametri: " + args.id.toString())

        return root
    }
    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }
}