Coroutine async UI

coroutine_example

private fun applyHashtagSpanForResiNumber(fullText: String,
                                          messageEditorSpannable: Spannable) {
    launch(UI) {
        var indexAsync = async(CommonPool, CoroutineStart.LAZY) {
            fullText.indexOf(RESI_NUMBER, 0)
        }
        while (indexAsync.await() != -1) {
            val hashtagSpanAsync = async(CommonPool, CoroutineStart.LAZY) {
                CharacterStyle.wrap(hashtagForegroundColorSpan)
            }
            val hashtagSpanValue = hashtagSpanAsync.await()
            messageEditorSpannable.setSpan(
                hashtagSpanValue,
                indexAsync.await(),
                indexAsync.await() + RESI_NUMBER.length,
                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
            )
            indexAsync = async(CommonPool, CoroutineStart.LAZY) {
                fullText.indexOf(RESI_NUMBER, indexAsync.await() + 1)
            }
        }
    }
}