CODEWITHSUNDEEP
androidnfc
Jacek Kwiecień
Jacek Kwiecień

Reputation: 12649

Listening for credit card info with NFC

Is there any working sample on how to create sample app listening for credit card presence?

I tried this piece of code from Android samples but nothing happens when I scan the card (NFC is working I hear the beep sound)

 public class MainActivity extends Activity {

private NfcAdapter mAdapter;
private PendingIntent mPendingIntent;
private IntentFilter[] mFilters;
private String[][] mTechLists;
private TextView mText;
private int mCount = 0;

@Override
public void onCreate(Bundle savedState) {
    super.onCreate(savedState);

    setContentView(R.layout.activity_main);

    mAdapter = NfcAdapter.getDefaultAdapter(this);

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

    IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
    try {
        ndef.addDataType("*/*");
    } catch (MalformedMimeTypeException e) {
        throw new RuntimeException("fail", e);
    }
    mFilters = new IntentFilter[] {
            ndef,
    };

    mTechLists = new String[][] { new String[] { NfcF.class.getName() } };
}

@Override
public void onResume() {
    super.onResume();
    mAdapter.enableForegroundDispatch(this, mPendingIntent, mFilters, mTechLists);

    String action = getIntent().getAction(); //allways MAIN, even after scanning a card
    Parcelable[] msg1 = getIntent().getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); //allways null
    Parcelable[] msg2 = getIntent().getParcelableArrayExtra(NfcAdapter.EXTRA_TAG); //allways null
}

@Override
public void onNewIntent(Intent intent) {
    Log.i("Foreground dispatch", "Discovered tag with intent: " + intent);
    mText.setText("Discovered tag " + ++mCount + " with intent: " + intent);

}
@Override
public void onPause() {
    super.onPause();
    mAdapter.disableForegroundDispatch(this);
}

}

Maybe there is something wrong with my Manifest file:

<uses-sdk
    android:minSdkVersion="16"
    android:targetSdkVersion="17" />

<uses-permission android:name="android.permission.NFC" />

<uses-feature
    android:name="android.hardware.nfc"
    android:required="true" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="pl.aprilapps.nfcreader.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.nfc.action.TAG_DISCOVERED" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.nfc.action.NDEF_DISCOVERED" />

            <category android:name="android.intent.category.DEFAULT" />

            <data android:mimeType="text/plain" />
        </intent-filter>
    </activity>
</application>

Upvotes: 1

Views: 4642

Answers (1)

Ameen
Ameen

Reputation: 2586

Take a look at this blog post. I outline exactly the type of NFC tags you need to listen to, to react to presence of a contactless EMV card. The code uses Triangle.io's API to extract the card information once the card is detected, but you can fairly easily change that part as you see fit.

Upvotes: 1

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