Android kotlin preferences spinner with values from arrays.xml - kotlin

Question

settings_activity.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/settings"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
root_preferences.xml
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<ListPreference
android:dialogTitle="Select bluetooth adapter"
android:key="bluetoothName"
android:summary="Click to show a list to choose from"
android:title="Bluetooth adapter" />
<ListPreference
android:dialogTitle="Select units"
android:entries="#array/units_names"
android:entryValues="#array/units_values"
android:key="units"
android:summary="Click to show a list to choose from"
android:title="Units" />
</PreferenceScreen>
SettingsActivity.kt
class SettingsActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.settings_activity)
supportFragmentManager
.beginTransaction()
.replace(R.id.settings, SettingsFragment())
.commit()
supportActionBar?.setDisplayHomeAsUpEnabled(true)
}
class SettingsFragment : PreferenceFragmentCompat() {
override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
setPreferencesFromResource(R.xml.root_preferences, rootKey)
}
}
}
arrays.xml
<resources>
<string-array name="units_values">
<item>miles</item>
<item>km</item>
</string-array>
<string-array name="units_names">
<item>miles and mpg</item>
<item>km and l/100km</item>
</string-array>
</resources>
MainActivity.kt
...
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
menuInflater.inflate(R.menu.toolbar, menu);
return true;
}
override fun onOptionsItemSelected( item: MenuItem) : Boolean {
when (item.itemId) {
R.id.toolbar_item_settings -> {
val intent: Intent = Intent(this, SettingsActivity::class.java)
startActivity(intent)
return true
}
}
return true
}
...
Why are the array values not showing in the spinner?

Answer 1

It's because the list item text colour has defaulted to black.
It needs:
<item name="textColorAlertDialogListItem">#color/text</item>