MainActivity.kt

// Kotlin
public fun rateApp(rateMeButton: View): Unit {
    val packageName = this.packageName
    val playStoreAppUri = "market://details?id=$packageName"
    val playStoreSiteUri = "https://play.google.com/store/apps/details?id=$packageName"
    
    try {
        val playStoreAppIntent = Intent(Intent.ACTION_VIEW, Uri.parse(playStoreAppUri))
        startActivity(playStoreAppIntent)
    } catch (e: ActivityNotFoundException) {
        val playStoreBrowserIntent = Intent(Intent.ACTION_VIEW, Uri.parse(playStoreSiteUri))
        startActivity(playStoreBrowserIntent)
    }
}