使用字符串插值更改 Android 工作室 Kotlin 中的 imageView 资源？

Question

We can change image by name using string interpolation in Swift. Is there a way to achieve this in Kotlin? Can we change selected image programatically in Kotlin?

let image = UIIMage(named : "\(imageName)_selected")

Answer 1

You can:

val resourceId = resources.getIdentifier("${imagename}_selected", "drawable", packageName)

Personally, I'd go for a solution like this:

val resourceId = when (imageName) {
    "image1" -> R.drawable.image1_selected
    "image2" -> R.drawable.image2_selected
}

Although this is a little bit longer, it gives compile time warnings and errors, assuring you the drawable is there.

Perhaps the question is: why are you getting the string imageName? Can it be solved better?