NFCUtil_writeMessageToTag.kt

private fun writeMessageToTag(nfcMessage: NdefMessage, tag: Tag?): Boolean {

        try {
            val nDefTag = Ndef.get(tag)

            nDefTag?.let {
                it.connect()
                if (it.maxSize < nfcMessage.toByteArray().size) {
                    //Message to large to write to NFC tag
                    return false
                }
                if (it.isWritable) {
                    it.writeNdefMessage(nfcMessage)
                    it.close()
                    //Message is written to tag
                    return true
                } else {
                    //NFC tag is read-only
                    return false
                }
            }

            val nDefFormatableTag = NdefFormatable.get(tag)

            nDefFormatableTag?.let {
                try {
                    it.connect()
                    it.format(nfcMessage)
                    it.close()
                    //The data is written to the tag
                    return true
                } catch (e: IOException) {
                    //Failed to format tag
                    return false
                }
            }
            //NDEF is not supported
            return false

        } catch (e: Exception) {
            //Write operation has failed
        }
        return false
    }
}