51.9 Adding Items to the ListView
Each time the floating action button is tapped by the user, a new item will be added to the ListView in the form of the prevailing time and date. To achieve this, some changes need to be made to the MainActivity.kt file.
Begin by modifying the onCreate() method to obtain a reference to the ListView instance and to initialize an adapter instance to allow us to add items to the list in the form of an array:
import android.os.Bundle
import com.google.android.material.snackbar.Snackbar
import androidx.appcompat.app.AppCompatActivity
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.widget.ArrayAdapter
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.content_main.*
import java.util.ArrayList
class MainActivity : AppCompatActivity() {
var listItems = ArrayList<String>()
...