The idea is to create an a list item xml, and give it the design choices you want. If you want to change the list item color, use this xml code android:textColor="@android:color/holo_orange_dark".

If you want to change the text to italic or bold, use this xml android:textStyle="italic|bold". And even if you want to change the font itself, you can by this font-family property in xml android:fontFamily="sans-serif-condensed".

Now, you got the idea. Let’s build a sample application to illustrate this more practically.

  1. create Android app in Android Studio
  2. use this XML as a res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical">
<TextView
   android:id="@+id/textView"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:fontFamily="sans-serif-condensed"
   android:textColor="@android:color/holo_orange_dark"
   android:textSize="24sp"
   android:textStyle="italic|bold" />
</LinearLayout>
  1. use this Kotlin code in your src/MainActivity.kt.
import android.os.Bundle
import android.widget.ArrayAdapter
import android.widget.ListView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   var operatingSystem: Array<String> = arrayOf("Android", "IPhone", "WindowsMobile", "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X")
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      val listView: ListView = findViewById(R.id.listView)
      val adapter = object : ArrayAdapter<String>(this, R.layout.list_item, R.id.textView, operatingSystem) {
      }
      listView.adapter = adapter
   }
}
  1. create a layout resource file, and name it list_item.xml. It represents an item in the listview.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical">
<TextView
   android:id="@+id/textView"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:fontFamily="sans-serif-condensed"
   android:textColor="@android:color/holo_orange_dark"
   android:textSize="24sp"
   android:textStyle="italic|bold" />
</LinearLayout>

Run the application, and you’ll see the listview items is configurable via list_item.xml file. Change the color of the item as you want, and re-run the app.