loisenjoki

    private fun readFromNFC(ndef: Ndef) {
        try {
            ndef.connect()
            val ndefMessage = ndef.ndefMessage
            val message = String(ndefMessage.records[0].payload)
            Log.d(TAG, "readFromNFC: $message")
            mTvMessage.text = message
            ndef.close()
        } catch (e: IOException) {
            e.printStackTrace()

loisenjoki

    private fun writeToNfc(ndef: Ndef, message: String) {
        mTvMessage!!.text = "write semething"
        if (ndef != null) {
            try {
                ndef.connect()
                val mimeRecord = NdefRecord.createMime(
                    "text/plain",
                    message.toByteArray(Charset.forName("US-ASCII"))
                )
                ndef.writeNdefMessage(NdefMessage(mimeRecord))