读取NFC标签上的“有效载荷”数据？

Question

I'm using the following code to “read” an nfc tag:

@Override
protected void onResume () {
    super.onResume();

    // read nfc tag....this is what will "read" the external record?
    if (getIntent().hasExtra(NfcAdapter.EXTRA_TAG)) {

        NdefMessage ndefMessage = this.getNdefMessageFromIntent(getIntent());

        if(ndefMessage.getRecords().length > 0){

            NdefRecord ndefRecord = ndefMessage.getRecords()[0];

            String payload = new String(ndefRecord.getPayload());

            Toast.makeText(this, payload, Toast.LENGTH_SHORT).show();

        }

    }


    enableForegroundDispatchSystem();

}

I'm getting an error, saying that it “cannot resolve method getNdefMessageFromIntent” Is there another method that I should use to “read” the payload on the tag? Not sure how to fix this….Thanks for any help!!

Answer 1

You may try the following:

if (intent.getAction().equals(NfcAdapter.ACTION_NDEF_DISCOVERED)) {
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
if (rawMsgs != null) { // NDEF Message available
    NdefMessage msg =(NdefMessage) rawMsgs[0];
    NdefRecord ndefRecords = ndefMessage.getRecords(); 

    String payload = new String(ndefRecord[0].getPayload());
    Toast.makeText(this, payload, Toast.LENGTH_SHORT).show();
}

}