Issue with changing spinner text color based on selected option (Android, Kotlin)

Question

I have some code right now to change the text color of a spinner depending on what field is picked (0, 1, 2). This works great normally, but if the screen is rotated when the spinner is on its default position (0), the text color goes back to being black and doesn't change until an option other than itself is picked.

The weird thing is that this doesn't happen at all with the two other options. Here is my code:

package com.google.gradient.red.fragments

import android.app.Application
import android.view.View
import android.widget.AdapterView
import android.widget.TextView
import androidx.core.content.ContextCompat
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.MutableLiveData
import com.google.gradient.red.R
import com.google.gradient.red.data.models.JournalData
import com.google.gradient.red.data.models.Mood

//  This file handles changing mood picker text color
class SharedViewModel(application: Application): AndroidViewModel(application) {

    // Checks if journal database is empty
    val emptyDatabase: MutableLiveData<Boolean> = MutableLiveData(false)

    fun checkIfDatabaseEmpty(journalData: List<JournalData>) {
        emptyDatabase.value = journalData.isEmpty()
    }

    // Listens for when mood selector changes
    val listener: AdapterView.OnItemSelectedListener = object :
        AdapterView.OnItemSelectedListener {
        override fun onNothingSelected(p0: AdapterView<*>?) {  }

        // Checks which option the spinner is on and sets text color
        override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
            when(position) {
                0 -> { (parent?.getChildAt(0) as? TextView)?.setTextColor(ContextCompat.getColor(application, R.color.pgreen)) }
                1 -> { (parent?.getChildAt(0) as? TextView)?.setTextColor(ContextCompat.getColor(application, R.color.pblue)) }
                2 -> { (parent?.getChildAt(0) as? TextView)?.setTextColor(ContextCompat.getColor(application, R.color.pred)) }
            }
        }

    }

    // Gets title and description as parameters and checks if either is empty
    fun verifyDataFromUser(title: String, description: String): Boolean {
        return !(title.isEmpty() || description.isEmpty())
    }

    // Reads the mood spinner and assigns a mood value.
    fun parseMood(mood: String): Mood {
        return when(mood) {
            "Happy" -> {Mood.HAPPY}
            "Okay" -> {Mood.OKAY}
            "Upset" -> {Mood.UPSET}
            else -> {Mood.HAPPY}
        }
    }

    // Parses mood, and returns integer value of mood selected
    fun parseMood(mood: Mood): Int {
        return when(mood) {
            Mood.HAPPY -> 0
            Mood.OKAY -> 1
            Mood.UPSET -> 2
        }
    }
}

Any help would be greatly appreciated!

Answer 1

等待大神答复