NFC questions about the operation ...

NFC null

 
 

 
 
 
 

android: resource = "@ xml / filter_nfc" 
/> 

 
 
<-! Capture anything using NfcF -> 
 
 android.nfc.tech.NfcA  
 android.nfc.tech.MifareClassic  
 android.nfc.tech.MifareUltralight  

 

 

isNFC = getPackageManager () hasSystemFeature (PackageManager.FEATURE_NFC);.
if (isNFC) {
mAdapter = NfcAdapter.getDefaultAdapter (this);

mPendingIntent = PendingIntent.getActivity (this, 0,
new Intent (this, getClass ())
. AddFlags (Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
/ / Setup an intent filter for all MIME based dispatches
IntentFilter ndef = new IntentFilter (
NfcAdapter.ACTION_TECH_DISCOVERED);
ndef.addAction (NfcAdapter.ACTION_TAG_DISCOVERED);
try {
ndef.addDataType ("* / *");
} Catch (MalformedMimeTypeException e) {
Log.e ("NFCfail", "runtime Exception");
}

mFilters = new IntentFilter [] {ndef};

/ / Setup a tech list for all MifareClassic tags
mTechLists = new String [] [] {
new String [] {MifareClassic.class.getName ()},
new String [] {NfcA.class.getName ()}};

}




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

if (isNFC && mAdapter.isEnabled ()) {

mAdapter.enableForegroundDispatch (this, mPendingIntent, mFilters,
mTechLists);
}


}



After induction card to get to the data in onNewIntent follows:
public void onNewIntent (Intent intent) {
String action = intent.getAction ();
/ / Action printout is: android.nfc.action.TECH_DISCOVERED

Tag tagFromIntent = intent.getParcelableExtra (NfcAdapter.EXTRA_TAG);
/ / TagFromIntent printout is: TAG: Tech [android.nfc.tech.NfcA]

The question is:
MifareClassic mfc = MifareClassic.get (tagFromIntent);
/ / Here mfc print output is null This is why

}


Thank you!

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Seeking answers ah ah ah