我正在使用以下代码“读取” nfc标签:
@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();
}
我收到一个错误消息,说它“无法解析方法getNdefMessageFromIntent”,还有其他方法我可以用来“读取”标签上的有效载荷吗?不确定如何解决此问题。谢谢您!
最佳答案
您可以尝试以下方法:
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();
}
}