AndroidStringResource.kt

package com.yourpackage

import android.content.Context
import android.os.Parcelable
import androidx.annotation.PluralsRes
import androidx.annotation.StringRes
import kotlinx.android.parcel.Parcelize
import java.io.Serializable

sealed class AndroidStringResource : Parcelable {
    companion object {
        fun from(stringValue: String): AndroidStringResource {
            return ActualStringResource(stringValue)
        }

        fun from(@StringRes stringResourceId: Int, vararg formatArgs: Serializable): AndroidStringResource {
            return LocalResIdStringResource(stringResourceId, formatArgs.toList())
        }

        fun fromPlural(@PluralsRes pluralResourceId: Int, quantity: Int, vararg formatArgs: Serializable): AndroidStringResource {
            return PluralResIdStringResource(pluralResourceId, quantity, formatArgs.toList())
        }
    }

    abstract fun getValue(context: Context): String
}

@Parcelize
private data class ActualStringResource(private val actualString: String) : AndroidStringResource() {

    override fun getValue(context: Context): String {
        return actualString
    }
}

@Parcelize
private data class LocalResIdStringResource(@StringRes private val stringResourceId: Int,
                                            private val resourceFormatArgs: List<Serializable>? = null) : AndroidStringResource() {

    override fun getValue(context: Context): String {
        return context.getString(stringResourceId, *(resourceFormatArgs?.toTypedArray() ?: emptyArray()))
    }
}

@Parcelize
private data class PluralResIdStringResource(@PluralsRes private val pluralResourceId: Int,
                                             private val quantity: Int,
                                             private val resourceFormatArgs: List<Serializable>? = null) : AndroidStringResource() {

    override fun getValue(context: Context): String {
        return context.resources.getQuantityString(pluralResourceId, quantity, *(resourceFormatArgs?.toTypedArray() ?: emptyArray()))
    }
}