class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener
{
    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val nfc = NfcAdapter.getDefaultAdapter(this)
        nfc.setNdefPushMessageCallback(NfcHelper, this)
        nfc.setOnNdefPushCompleteCallback(NfcHelper, this)
    }

    override fun onNewIntent(intent: Intent)
    {
        // onResume gets called after this to handle the intent
        setIntent(intent)
        Log.d("nfcdev", "onNewIntent")
    }

    override fun onResume()
    {
        super.onResume()

        Log.d("nfcdev", "onResume")

        // Check to see that the Activity started due to an Android Beam
        if (NfcAdapter.ACTION_NDEF_DISCOVERED == intent.action)
        {
            val rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)
            // only one message sent during the beam
            val msg = rawMsgs[0] as NdefMessage
            // record 0 contains the MIME type, record 1 is the AAR, if present
            Toast.makeText(this, msg.records[0].payload.toString(), Toast.LENGTH_SHORT).show()
        }
    }

    private object NfcHelper : NfcAdapter.CreateNdefMessageCallback, NfcAdapter.OnNdefPushCompleteCallback
    {
        override fun onNdefPushComplete(event: NfcEvent?)
        {
            Log.d("nfcdev", "onNdefPushComplete")
            //Toast.makeText(this, "onNdefPushComplete", Toast.LENGTH_SHORT).show()
        }

        override fun createNdefMessage(event: NfcEvent?) = NdefMessage(arrayOf(
                NdefRecord.createExternal("pl.bonusplay.nfcdev", "nfcdev", "hello".toByteArray()),
                NdefRecord.createApplicationRecord("pl.bonusplay.nfcdev")))
    }
}