RoundedBackgroundColorSpanUsage.kt

private fun initSpannableText() {
    val span = RoundedBackgroundColorSpan(
        backgroundColor = colors.random(),
        padding = dp(5),
        radius = dp(5)
    )

    with(spanText) {
        setShadowLayer(dp(10), 0f, 0f, 0) // it's important for padding working

        text = androidx.core.text.buildSpannedString { inSpans(span) { append(text.toString()) } }
    }
}