想在android studio创建查看项目列表

Question

I want to create a list of clickable items as:

val clickableViews: List<View> = listOf(box_one_text, box_two_text, box_three_text, box_four_text, box_five_text, constraint_layout)

where box_xxx_text parameters are view-ids of different items. Does anyone know how to do it?

Answer 1

Since you have to add predefined elements, it's more convenient to use an array instead of a list.

val array = arrayOf(
            "One", "Two", "Three")

The first step to create a ListView is of course defining a ListView in your xml layout file.

<ListView
android:id="@+id/list_view"
  android:layout_width="0dp"
  android:layout_height="0dp"
  app:layout_constraintBottom_toBottomOf="parent"
  app:layout_constraintEnd_toEndOf="parent"
  app:layout_constraintStart_toStartOf="parent"
  app:layout_constraintTop_toTopOf="parent" />

This should do. The second step is to define an array adapter to insert your array into your listview.

val arrayAdapter: ArrayAdapter<*>

Then you can create a variable for the listview, and add your array into it

    var mListView = findViewById<ListView>(R.id.list_view)
    arrayAdapter = ArrayAdapter(this,
        android.R.layout.layoutfilename, array)
    mListView.adapter = arrayAdapter

Job done, hope it helps!

Answer 2

You could try applying view binding, I'd say that's the most efficient way...

This solution and a couple more variants are described here:

https://github.com/udacity/andfun-kotlin-color-my-views/issues/11