Just read an NFC tag

Question

I am developing an app that will use NFC tags for identification. All examples I find however, are about starting an app when a certain card is read. I tried looking for an exam

Answer 1

I found part of the answer here: NFC broadcastreceiver problem

That solution doesn't provide a complete working example, so I tried a little extra. To help future visitors, I'll post my solution. It is a NfcActivity which subclasses Activity, if you subclass this NfcActivity, all you have to do is implement its NfcRead method, and you're good to go:

public abstract class NfcActivity extends Activity  {
    // NFC handling stuff
    PendingIntent pendingIntent;
    NfcAdapter nfcAdapter;

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

        pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
                getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);

         nfcAdapter = NfcAdapter.getDefaultAdapter(this);
         nfcAdapter.enableForegroundDispatch(this, pendingIntent, null, null);
    }

    @Override
    protected void onPause() {
        super.onPause();
        nfcAdapter.disableForegroundDispatch(this);
    }

    // does nothing, has to be overridden in child classes
    public abstract void NfcRead(Intent intent);

    @Override
    public void onNewIntent(Intent intent) {
        String action = intent.getAction();

        if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)) {
            NfcRead(intent);            
        } 
    }
}