[V0_FILE]xml:file="AndroidManifest.xml" isMerged="true"

[V0_FILE]java:file="CardReaderActivity.java" isMerged="true" package com.example.nfcpayment; import android.app.Activity; import android.app.PendingIntent; import android.content.Intent; import android.content.IntentFilter; import android.nfc.NfcAdapter; import android.nfc.Tag; import android.nfc.tech.IsoDep; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import java.io.IOException; public class CardReaderActivity extends Activity { private static final String TAG = "CardReaderActivity"; private NfcAdapter nfcAdapter; private PendingIntent pendingIntent; private IntentFilter[] intentFiltersArray; private String[][] techListsArray; private TextView statusText; private TextView cardInfoText; private Button closeButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_card_reader); // UI bileşenlerini başlat statusText = findViewById(R.id.status_text); cardInfoText = findViewById(R.id.card_info_text); closeButton = findViewById(R.id.close_button); // NFC adaptörünü al nfcAdapter = NfcAdapter.getDefaultAdapter(this); // NFC kullanılabilirliğini kontrol et if (nfcAdapter == null) { statusText.setText("Bu cihaz NFC desteklemiyor"); return; } if (!nfcAdapter.isEnabled()) { statusText.setText("NFC kapalı. Lütfen NFC'yi açın."); return; } // NFC intent'i oluştur pendingIntent = PendingIntent.getActivity( this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0); // Intent filtreleri oluştur IntentFilter tech = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED); intentFiltersArray = new IntentFilter[] { tech }; // Teknoloji listelerini oluştur techListsArray = new String[][] { new String[] { IsoDep.class.getName() } }; // Kapat butonu için listener closeButton.setOnClickListener(v -> finish()); // Intent ile başlatıldıysa NFC tag'ini işle handleIntent(getIntent()); // Kullanıcıya talimat göster statusText.setText("Lütfen kartı cihazın arkasına yaklaştırın..."); } @Override protected void onResume() { super.onResume(); // NFC ön planda iken yakalama modunu etkinleştir if (nfcAdapter != null) { nfcAdapter.enableForegroundDispatch(this, pendingIntent, intentFiltersArray, techListsArray); } } @Override protected void onPause() { super.onPause(); // NFC ön planda yakalama modunu devre dışı bırak if (nfcAdapter != null) { nfcAdapter.disableForegroundDispatch(this); } } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); // Yeni bir NFC intent'i geldiğinde işle handleIntent(intent); } /** * NFC intent'ini işler */ private void handleIntent(Intent intent) { String action = intent.getAction(); if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(action) || NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)) { Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG); if (tag != null) { readCard(tag); } } } /** * NFC kartını okur */ private void readCard(Tag tag) { statusText.setText("Kart okunuyor..."); cardInfoText.setText(""); // Arka planda kart okuma işlemini başlat new Thread(() -> { NfcCardReader cardReader = NfcCardReader.get(tag); if (cardReader != null) { try { final NfcCardReader.CardInfo cardInfo = cardReader.readCard(); // UI thread'inde sonuçları göster runOnUiThread(() -> { statusText.setText("Kart başarıyla okundu"); cardInfoText.setText(cardInfo.toString()); // Kart bilgilerini kaydet if (!cardInfo.getPan().isEmpty()) { PreferenceManager.saveString(this, "last_read_card_type", cardInfo.getCardType()); PreferenceManager.saveString(this, "last_read_card_number", cardInfo.getPan()); PreferenceManager.saveString(this, "last_read_card_holder", cardInfo.getCardholderName()); PreferenceManager.saveString(this, "last_read_expiry_date", cardInfo.getExpiryDate()); Toast.makeText(this, "Kart bilgileri kaydedildi", Toast.LENGTH_SHORT).show(); } }); } catch (IOException e) { // UI thread'inde hata mesajını göster runOnUiThread(() -> { statusText.setText("Kart okuma hatası: " + e.getMessage()); }); } } else { // UI thread'inde hata mesajını göster runOnUiThread(() -> { statusText.setText("Bu kart desteklenmiyor"); }); } }).start(); } } [V0_FILE]java:file="CardReaderFragment.java" isMerged="true" package com.example.nfcpayment; import android.app.PendingIntent; import android.content.ClipData; import android.content.ClipboardManager; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.nfc.NfcAdapter; import android.nfc.Tag; import android.nfc.tech.IsoDep; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; import androidx.fragment.app.Fragment; import androidx.cardview.widget.CardView; import com.example.nfcpayment.utils.TrackDataParser; import java.io.IOException; import java.util.HashMap; import java.util.Map; public class CardReaderFragment extends Fragment { private static final String TAG = "CardReaderFragment"; private NfcAdapter nfcAdapter; private PendingIntent pendingIntent; private IntentFilter[] intentFiltersArray; private String[][] techListsArray; private TextView statusText; private TextView cardInfoText; private LinearLayout trackDataContainer; // Track data storage private String track1Data = ""; private String track2Data = ""; private String track3Data = ""; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_card_reader, container, false); // UI bileşenlerini başlat statusText = view.findViewById(R.id.status_text); cardInfoText = view.findViewById(R.id.card_info_text); trackDataContainer = view.findViewById(R.id.track_data_container); // NFC adaptörünü al nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity()); // NFC kullanılabilirliğini kontrol et if (nfcAdapter == null) { statusText.setText("Bu cihaz NFC desteklemiyor"); return view; } if (!nfcAdapter.isEnabled()) { statusText.setText("NFC kapalı. Lütfen NFC'yi açın."); return view; } // NFC intent'i oluştur pendingIntent = PendingIntent.getActivity( getActivity(), 0, new Intent(getActivity(), getActivity().getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0); // Intent filtreleri oluştur IntentFilter tech = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED); intentFiltersArray = new IntentFilter[] { tech }; // Teknoloji listelerini oluştur techListsArray = new String[][] { new String[] { IsoDep.class.getName() } }; // Kullanıcıya talimat göster statusText.setText("Lütfen kartı cihazın arkasına yaklaştırın..."); return view; } @Override public void onResume() { super.onResume(); // NFC ön planda iken yakalama modunu etkinleştir if (nfcAdapter != null) { nfcAdapter.enableForegroundDispatch(getActivity(), pendingIntent, intentFiltersArray, techListsArray); } } @Override public void onPause() { super.onPause(); // NFC ön planda yakalama modunu devre dışı bırak if (nfcAdapter != null) { nfcAdapter.disableForegroundDispatch(getActivity()); } } /** * NFC kartını okur */ public void readCard(Tag tag) { statusText.setText("Kart okunuyor..."); cardInfoText.setText(""); trackDataContainer.removeAllViews(); // Clear previous track data // Reset track data track1Data = ""; track2Data = ""; track3Data = ""; // Arka planda kart okuma işlemini başlat new Thread(() -> { NfcCardReader cardReader = NfcCardReader.get(tag); if (cardReader != null) { try { final NfcCardReader.CardInfo cardInfo = cardReader.readCard(); // Extract track data if available if (cardInfo != null) { track1Data = cardInfo.getTrack1Data(); track2Data = cardInfo.getTrack2Data(); track3Data = cardInfo.getTrack3Data(); } // UI thread'inde sonuçları göster getActivity().runOnUiThread(() -> { statusText.setText("Kart başarıyla okundu"); cardInfoText.setText(cardInfo.toString()); // Display track data displayTrackData(); // Kart bilgilerini kaydet if (!cardInfo.getPan().isEmpty()) { PreferenceManager.saveString(getActivity(), "last_read_card_type", cardInfo.getCardType()); PreferenceManager.saveString(getActivity(), "last_read_card_number", cardInfo.getPan()); PreferenceManager.saveString(getActivity(), "last_read_card_holder", cardInfo.getCardholderName()); PreferenceManager.saveString(getActivity(), "last_read_expiry_date", cardInfo.getExpiryDate()); } }); } catch (IOException e) { // UI thread'inde hata mesajını göster getActivity().runOnUiThread(() -> { statusText.setText("Kart okuma hatası: " + e.getMessage()); }); } } else { // UI thread'inde hata mesajını göster getActivity().runOnUiThread(() -> { statusText.setText("Bu kart desteklenmiyor"); }); } }).start(); } /** * Track verilerini gösterir ve kopyalama düğmelerini ekler */ private void displayTrackData() { trackDataContainer.removeAllViews(); // Track data map Map trackDataMap = new HashMap<>(); if (!track1Data.isEmpty()) trackDataMap.put("Track 1", track1Data); if (!track2Data.isEmpty()) trackDataMap.put("Track 2", track2Data); if (!track3Data.isEmpty()) trackDataMap.put("Track 3", track3Data); if (trackDataMap.isEmpty()) { TextView noDataText = new TextView(getActivity()); noDataText.setText("Kart üzerinde track verisi bulunamadı."); noDataText.setPadding(0, 16, 0, 16); trackDataContainer.addView(noDataText); return; } // Add track data with copy buttons for (Map.Entry entry : trackDataMap.entrySet()) { String trackName = entry.getKey(); String trackData = entry.getValue(); // Create card view for each track CardView trackCard = new CardView(getActivity()); LinearLayout.LayoutParams cardParams = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT ); cardParams.setMargins(0, 16, 0, 16); trackCard.setLayoutParams(cardParams); trackCard.setCardElevation(4); trackCard.setRadius(8); trackCard.setContentPadding(16, 16, 16, 16); // Create container for track content LinearLayout trackContainer = new LinearLayout(getActivity()); trackContainer.setOrientation(LinearLayout.VERTICAL); // Track title TextView titleText = new TextView(getActivity()); titleText.setText(trackName + ":"); titleText.setTextSize(18); titleText.setTextColor(getResources().getColor(android.R.color.black)); titleText.setPadding(0, 0, 0, 16); trackContainer.addView(titleText); // Parse track data Map parsedData; if (trackName.equals("Track 1")) { parsedData = TrackDataParser.parseTrack1(trackData); } else if (trackName.equals("Track 2")) { parsedData = TrackDataParser.parseTrack2(trackData); } else { parsedData = TrackDataParser.parseTrack3(trackData); } // Display parsed data for (Map.Entry parsedEntry : parsedData.entrySet()) { if (!parsedEntry.getValue().isEmpty()) { LinearLayout fieldContainer = new LinearLayout(getActivity()); fieldContainer.setOrientation(LinearLayout.HORIZONTAL); fieldContainer.setPadding(0, 4, 0, 4); TextView fieldLabel = new TextView(getActivity()); fieldLabel.setText(parsedEntry.getKey() + ": "); fieldLabel.setTextColor(getResources().getColor(android.R.color.black)); fieldLabel.setLayoutParams(new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT )); TextView fieldValue = new TextView(getActivity()); fieldValue.setText(parsedEntry.getValue()); fieldValue.setTextColor(getResources().getColor(android.R.color.darker_gray)); fieldValue.setLayoutParams(new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT )); fieldContainer.addView(fieldLabel); fieldContainer.addView(fieldValue); trackContainer.addView(fieldContainer); } } // Raw data section TextView rawDataLabel = new TextView(getActivity()); rawDataLabel.setText("Ham Veri:"); rawDataLabel.setTextSize(14); rawDataLabel.setTextColor(getResources().getColor(android.R.color.black)); rawDataLabel.setPadding(0, 16, 0, 4); trackContainer.addView(rawDataLabel); TextView rawDataText = new TextView(getActivity()); rawDataText.setText(trackData); rawDataText.setTextColor(getResources().getColor(android.R.color.darker_gray)); rawDataText.setPadding(0, 0, 0, 16); trackContainer.addView(rawDataText); // Copy buttons container LinearLayout buttonContainer = new LinearLayout(getActivity()); buttonContainer.setOrientation(LinearLayout.HORIZONTAL); // Copy raw data button Button copyRawButton = new Button(getActivity()); copyRawButton.setText("Ham Veriyi Kopyala"); copyRawButton.setLayoutParams(new LinearLayout.LayoutParams( 0, LinearLayout.LayoutParams.WRAP_CONTENT, 1 )); copyRawButton.setOnClickListener(v -> copyToClipboard(trackName + " Ham Veri", trackData)); buttonContainer.addView(copyRawButton); // Copy formatted data button Button copyFormattedButton = new Button(getActivity()); copyFormattedButton.setText("Formatlanmış Veriyi Kopyala"); copyFormattedButton.setLayoutParams(new LinearLayout.LayoutParams( 0, LinearLayout.LayoutParams.WRAP_CONTENT, 1 )); // Build formatted data string StringBuilder formattedData = new StringBuilder(); for (Map.Entry parsedEntry : parsedData.entrySet()) { if (!parsedEntry.getValue().isEmpty() && !parsedEntry.getKey().equals("Raw Data")) { formattedData.append(parsedEntry.getKey()).append(": ").append(parsedEntry.getValue()).append("\n"); } } copyFormattedButton.setOnClickListener(v -> copyToClipboard(trackName + " Formatlanmış Veri", formattedData.toString())); buttonContainer.addView(copyFormattedButton); trackContainer.addView(buttonContainer); // Add track container to card trackCard.addView(trackContainer); // Add card to main container trackDataContainer.addView(trackCard); } } /** * Metni panoya kopyalar */ private void copyToClipboard(String label, String text) { ClipboardManager clipboard = (ClipboardManager) getActivity().getSystemService(Context.CLIPBOARD_SERVICE); ClipData clip = ClipData.newPlainText(label, text); clipboard.setPrimaryClip(clip); Toast.makeText(getActivity(), label + " kopyalandı", Toast.LENGTH_SHORT).show(); } } [V0_FILE]java:file="HomeFragment.java" isMerged="true" package com.example.nfcpayment; import android.content.ComponentName; import android.content.Intent; import android.nfc.cardemulation.CardEmulation; import android.nfc.NfcAdapter; import android.os.Bundle; import android.provider.Settings; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.Switch; import android.widget.TextView; import android.widget.ImageView; import android.widget.Toast; import androidx.fragment.app.Fragment; public class HomeFragment extends Fragment { private NfcAdapter nfcAdapter; private CardEmulation cardEmulation; private TextView statusText; private TextView cardNumberText; private TextView cardHolderText; private TextView cardExpiresText; private ImageView cardLogoImage; private Switch cloudProcessingSwitch; private Button defaultButton; private Button settingsButton; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_home, container, false); // UI bileşenlerini başlat statusText = view.findViewById(R.id.status_text); cardNumberText = view.findViewById(R.id.card_number); cardHolderText = view.findViewById(R.id.card_holder); cardExpiresText = view.findViewById(R.id.card_expires); cardLogoImage = view.findViewById(R.id.card_logo); cloudProcessingSwitch = view.findViewById(R.id.cloud_processing_switch); defaultButton = view.findViewById(R.id.default_button); settingsButton = view.findViewById(R.id.settings_button); // NFC adaptörünü al nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity()); // NFC kullanılabilirliğini kontrol et if (nfcAdapter == null) { statusText.setText("Bu cihaz NFC desteklemiyor"); cloudProcessingSwitch.setEnabled(false); defaultButton.setEnabled(false); return view; } // CardEmulation servisini al cardEmulation = CardEmulation.getInstance(nfcAdapter); // Bulut işleme ayarını yükle boolean useCloudProcessing = PreferenceManager.getBoolean(getActivity(), "use_cloud_processing", true); cloudProcessingSwitch.setChecked(useCloudProcessing); // Bulut işleme switch'i için listener cloudProcessingSwitch.setOnCheckedChangeListener((buttonView, isChecked) -> { PreferenceManager.saveBoolean(getActivity(), "use_cloud_processing", isChecked); updateStatus(); }); // Varsayılan ödeme uygulaması butonu için listener defaultButton.setOnClickListener(v -> setAsDefault()); // Ayarlar butonu için listener settingsButton.setOnClickListener(v -> { Intent intent = new Intent(Settings.ACTION_NFC_SETTINGS); startActivity(intent); }); // Kart bilgilerini göster updateCardInfo(); return view; } @Override public void onResume() { super.onResume(); updateStatus(); updateCardInfo(); } /** * Kart bilgilerini günceller */ private void updateCardInfo() { String cardNumber = PreferenceManager.getString(getActivity(), "card_number", "4111111111111111"); String cardHolder = PreferenceManager.getString(getActivity(), "card_holder_name", "JOHN DOE"); String expiryDate = PreferenceManager.getString(getActivity(), "expiry_date", "24/12"); // Kart numarasını maskele String maskedCardNumber = maskCardNumber(cardNumber); cardNumberText.setText(maskedCardNumber); cardHolderText.setText(cardHolder); cardExpiresText.setText(expiryDate); // Kart tipine göre logo göster if (cardNumber.startsWith("4")) { cardLogoImage.setImageResource(R.drawable.ico_visa); } else if (cardNumber.startsWith("5")) { cardLogoImage.setImageResource(R.drawable.ico_master); } else if (cardNumber.startsWith("3")) { cardLogoImage.setImageResource(R.drawable.ico_amex); } else { cardLogoImage.setImageResource(R.drawable.chip); } } /** * Kart numarasını maskeler */ private String maskCardNumber(String cardNumber) { if (cardNumber == null || cardNumber.length() < 13) { return cardNumber; } int length = cardNumber.length(); StringBuilder masked = new StringBuilder(); // İlk 4 haneyi göster masked.append(cardNumber.substring(0, 4)); // Ortadaki haneleri maskele for (int i = 4; i < length - 4; i++) { masked.append("*"); } // Son 4 haneyi göster masked.append(cardNumber.substring(length - 4)); // 4'lü gruplar halinde formatla StringBuilder formatted = new StringBuilder(); for (int i = 0; i < masked.length(); i++) { if (i > 0 && i % 4 == 0) { formatted.append(" "); } formatted.append(masked.charAt(i)); } return formatted.toString(); } /** * NFC ve HCE durumunu günceller */ private void updateStatus() { if (nfcAdapter == null) { return; } // NFC açık mı kontrol et if (!nfcAdapter.isEnabled()) { statusText.setText("NFC kapalı. Lütfen NFC'yi açın."); return; } // HCE servisimiz varsayılan ödeme servisi mi kontrol et boolean isDefault = cardEmulation.isDefaultServiceForCategory( new ComponentName(getActivity(), TrackDataHostApduService.class), CardEmulation.CATEGORY_PAYMENT); if (!isDefault) { statusText.setText("Bu uygulama varsayılan ödeme servisi değil."); return; } // Bulut işleme durumunu kontrol et boolean useCloudProcessing = cloudProcessingSwitch.isChecked(); if (useCloudProcessing) { statusText.setText("Hazır! Bulut işleme aktif."); } else { statusText.setText("Hazır! Yerel işleme aktif."); } } /** * Varsayılan ödeme uygulaması olarak ayarla */ private void setAsDefault() { if (nfcAdapter == null || !nfcAdapter.isEnabled()) { Toast.makeText(getActivity(), "NFC kullanılamıyor. Lütfen NFC'yi açın.", Toast.LENGTH_SHORT).show(); return; } Intent intent = new Intent(CardEmulation.ACTION_CHANGE_DEFAULT); intent.putExtra(CardEmulation.EXTRA_CATEGORY, CardEmulation.CATEGORY_PAYMENT); intent.putExtra(CardEmulation.EXTRA_SERVICE_COMPONENT, new ComponentName(getActivity(), TrackDataHostApduService.class)); startActivity(intent); } } [V0_FILE]java:file="MainActivity.java" isMerged="true" import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } if (id == R.id.menu_aid_database) { Intent intent = new Intent(this, AidDatabaseActivity.class); startActivity(intent); return true; } return super.onOptionsItemSelected(item); } } [V0_FILE]java:file="NfcCardReader.java" isMerged="true" import android.nfc.Tag; import android.nfc.tech.IsoDep; import android.util.Log; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.Arrays; import java.util.HashMap; import java.util.Map; public class NfcCardReader { private static final String TAG = "NfcCardReader"; private IsoDep isoDep; private CardInfo cardInfo; // APDU Commands private static final byte[] SELECT_PPSE = {(byte) 0x00, (byte) 0xA4, (byte) 0x04, (byte) 0x00, (byte) 0x0E, (byte) 0x32, (byte) 0x50, (byte) 0x41, (byte) 0x59, (byte) 0x2E, (byte) 0x53, (byte) 0x59, (byte) 0x53, (byte) 0x2E, (byte) 0x44, (byte) 0x44, (byte) 0x46, (byte) 0x30, (byte) 0x31, (byte) 0x00}; private static final byte[] GET_PROCESSING_OPTIONS = {(byte) 0x80, (byte) 0xA8, (byte) 0x00, (byte) 0x00, (byte) 0x02, (byte) 0x83, (byte) 0x00, (byte) 0x00}; private static final byte[] READ_RECORD = {(byte) 0x00, (byte) 0xB2, (byte) 0x01, (byte) 0x0C, (byte) 0x00}; private static final byte[] GET_DATA = {(byte) 0x80, (byte) 0xCA, (byte) 0x9F, (byte) 0x36, (byte) 0x00}; // Track data tags private static final byte[] TRACK1_DATA_TAG = {(byte) 0x56}; // Tag '56' private static final byte[] TRACK2_DATA_TAG = {(byte) 0x57}; // Tag '57' private static final byte[] TRACK3_DATA_TAG = {(byte) 0x5F, (byte) 0x21}; // Tag '5F21' (not standard, but used by some cards) private NfcCardReader(Tag tag) { isoDep = IsoDep.get(tag); cardInfo = new CardInfo(); } public static NfcCardReader get(Tag tag) { if (IsoDep.get(tag) != null) { return new NfcCardReader(tag); } return null; } public CardInfo readCard() throws IOException { try { isoDep.connect(); isoDep.setTimeout(5000); // 5 seconds timeout // Select PPSE (Proximity Payment System Environment) byte[] ppseResponse = isoDep.transceive(SELECT_PPSE); if (!isSuccessResponse(ppseResponse)) { Log.e(TAG, "Failed to select PPSE"); return cardInfo; } // Extract AID from PPSE response byte[] aid = extractAidFromPpseResponse(ppseResponse); if (aid == null) { Log.e(TAG, "No AID found in PPSE response"); return cardInfo; } // Select application using AID byte[] selectAppCommand = buildSelectApplicationCommand(aid); byte[] selectAppResponse = isoDep.transceive(selectAppCommand); if (!isSuccessResponse(selectAppResponse)) { Log.e(TAG, "Failed to select application"); return cardInfo; } // Identify card type from AID cardInfo.cardType = identifyCardTypeFromAid(aid); // Get Processing Options byte[] gpoResponse = isoDep.transceive(GET_PROCESSING_OPTIONS); if (!isSuccessResponse(gpoResponse)) { Log.e(TAG, "Failed to get processing options"); } // Read records for (int sfi = 1; sfi <= 10; sfi++) { for (int record = 1; record <= 10; record++) { try { byte[] readRecordCommand = {(byte) 0x00, (byte) 0xB2, (byte) record, (byte) ((sfi << 3) | 0x04), (byte) 0x00}; byte[] recordResponse = isoDep.transceive(readRecordCommand); if (isSuccessResponse(recordResponse)) { processRecordData(recordResponse); } } catch (Exception e) { // Skip to next record/SFI } } } // Try to get track data directly tryGetTrackData(); return cardInfo; } finally { try { isoDep.close(); } catch (IOException e) { Log.e(TAG, "Error closing IsoDep", e); } } } private void tryGetTrackData() { try { // Try to get Track 1 data byte[] getTrack1Command = {(byte) 0x00, (byte) 0xB2, (byte) 0x01, (byte) 0x3C, (byte) 0x00}; byte[] track1Response = isoDep.transceive(getTrack1Command); if (isSuccessResponse(track1Response)) { cardInfo.track1Data = extractTrackData(track1Response, TRACK1_DATA_TAG); } } catch (Exception e) { Log.e(TAG, "Error getting Track 1 data", e); } try { // Try to get Track 2 data byte[] getTrack2Command = {(byte) 0x00, (byte) 0xB2, (byte) 0x02, (byte) 0x3C, (byte) 0x00}; byte[] track2Response = isoDep.transceive(getTrack2Command); if (isSuccessResponse(track2Response)) { cardInfo.track2Data = extractTrackData(track2Response, TRACK2_DATA_TAG); } } catch (Exception e) { Log.e(TAG, "Error getting Track 2 data", e); } try { // Try to get Track 3 data (less common) byte[] getTrack3Command = {(byte) 0x00, (byte) 0xB2, (byte) 0x03, (byte) 0x3C, (byte) 0x00}; byte[] track3Response = isoDep.transceive(getTrack3Command); if (isSuccessResponse(track3Response)) { cardInfo.track3Data = extractTrackData(track3Response, TRACK3_DATA_TAG); } } catch (Exception e) { Log.e(TAG, "Error getting Track 3 data", e); } } private String extractTrackData(byte[] data, byte[] tag) { // Simple TLV parsing for (int i = 0; i < data.length - 1; i++) { if (data[i] == tag[0]) { if (tag.length == 1 || (i + 1 < data.length && data[i + 1] == tag[1])) { int tagLength = tag.length; int dataLength = data[i + tagLength]; if (i + tagLength + 1 + dataLength <= data.length) { byte[] value = Arrays.copyOfRange(data, i + tagLength + 1, i + tagLength + 1 + dataLength); return bytesToHex(value); } } } } return ""; } private void processRecordData(byte[] data) { Map tlvData = parseTlv(data); // PAN (Primary Account Number) - Tag 0x5A if (tlvData.containsKey(0x5A)) { cardInfo.pan = bytesToHex(tlvData.get(0x5A)).replace("F", "").trim(); } // Cardholder Name - Tag 0x5F20 if (tlvData.containsKey(0x5F20)) { cardInfo.cardholderName = new String(tlvData.get(0x5F20)).trim(); } // Expiry Date - Tag 0x5F24 if (tlvData.containsKey(0x5F24)) { byte[] expiryBytes = tlvData.get(0x5F24); if (expiryBytes.length >= 3) { String yearMonth = bytesToHex(expiryBytes).substring(0, 4); cardInfo.expiryDate = yearMonth.substring(2, 4) + "/" + yearMonth.substring(0, 2); } } // Track 1 Data - Tag 0x56 if (tlvData.containsKey(0x56)) { cardInfo.track1Data = bytesToHex(tlvData.get(0x56)); } // Track 2 Data - Tag 0x57 if (tlvData.containsKey(0x57)) { cardInfo.track2Data = bytesToHex(tlvData.get(0x57)); } // Track 3 Data - Tag 0x5F21 (not standard, but used by some cards) if (tlvData.containsKey(0x5F21)) { cardInfo.track3Data = bytesToHex(tlvData.get(0x5F21)); } } private Map parseTlv(byte[] data) { Map result = new HashMap<>(); int index = 0; while (index < data.length) { // Get tag int tag = data[index] & 0xFF; index++; // Check for 2-byte tag if ((tag & 0x1F) == 0x1F && index < data.length) { tag = (tag << 8) | (data[index] & 0xFF); index++; } // Get length if (index >= data.length) break; int length = data[index] & 0xFF; index++; // Check for multi-byte length if ((length & 0x80) != 0) { int numLengthBytes = length & 0x7F; length = 0; for (int i = 0; i < numLengthBytes && index < data.length; i++) { length = (length << 8) | (data[index] & 0xFF); index++; } } // Get value if (index + length <= data.length) { byte[] value = Arrays.copyOfRange(data, index, index + length); result.put(tag, value); index += length; } else { break; } } return result; } private byte[] extractAidFromPpseResponse(byte[] ppseResponse) { // Simple FCI template parsing to extract AID for (int i = 0; i < ppseResponse.length - 1; i++) { if (ppseResponse[i] == (byte) 0x4F) { // AID tag int length = ppseResponse[i + 1] & 0xFF; if (i + 2 + length <= ppseResponse.length) { return Arrays.copyOfRange(ppseResponse, i + 2, i + 2 + length); } } } return null; } private byte[] buildSelectApplicationCommand(byte[] aid) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); baos.write(0x00); // CLA baos.write(0xA4); // INS baos.write(0x04); // P1 baos.write(0x00); // P2 baos.write(aid.length); // Lc try { baos.write(aid); // Data baos.write(0x00); // Le } catch (IOException e) { Log.e(TAG, "Error building select command", e); } return baos.toByteArray(); } private boolean isSuccessResponse(byte[] response) { return response != null && response.length >= 2 && (response[response.length - 2] == (byte) 0x90 && response[response.length - 1] == (byte) 0x00); } private String identifyCardTypeFromAid(byte[] aid) { if (aid == null) { return "Unknown Card"; } // Convert byte array to hex string String aidHex = bytesToHex(aid); // Look up the AID in the database AidDatabaseHelper aidHelper = new AidDatabaseHelper(); AidDatabaseHelper.AidInfo aidInfo = aidHelper.findAid(aidHex); if (aidInfo != null && aidInfo.getName() != null && !aidInfo.getName().isEmpty()) { return aidInfo.getName(); } // Fallback to basic identification if (aidHex.startsWith("A000000003")) { return "Visa"; } else if (aidHex.startsWith("A000000004")) { return "MasterCard"; } else if (aidHex.startsWith("A00000002501")) { return "American Express"; } else if (aidHex.startsWith("A0000001523010")) { return "Discover"; } else if (aidHex.startsWith("A0000000651010")) { return "JCB"; } return "Unknown Card"; } private String bytesToHex(byte[] bytes) { StringBuilder sb = new StringBuilder(); for (byte b : bytes) { sb.append(String.format("%02X", b)); } return sb.toString(); } public static class CardInfo { private String cardType = "Unknown Card"; private String pan = ""; private String cardholderName = ""; private String expiryDate = ""; private String applicationLabel = ""; private String track1Data = ""; private String track2Data = ""; private String track3Data = ""; public String getCardType() { return cardType; } public String getPan() { return pan; } public String getCardholderName() { return cardholderName; } public String getExpiryDate() { return expiryDate; } public String getTrack1Data() { return track1Data; } public String getTrack2Data() { return track2Data; } public String getTrack3Data() { return track3Data; } @Override public String toString() { StringBuilder sb = new StringBuilder(); if (!cardType.isEmpty()) { sb.append("Kart Tipi: ").append(cardType).append("\n\n"); } if (!pan.isEmpty()) { sb.append("Kart Numarası: ").append(pan).append("\n\n"); } if (!cardholderName.isEmpty()) { sb.append("Kart Sahibi: ").append(cardholderName).append("\n\n"); } if (!expiryDate.isEmpty()) { sb.append("Son Kullanma Tarihi: ").append(expiryDate).append("\n\n"); } if (!applicationLabel.isEmpty()) { sb.append("Uygulama Etiketi: ").append(applicationLabel).append("\n\n"); } return sb.toString(); } } // Dummy AidDatabaseHelper class for compilation private static class AidDatabaseHelper { public AidInfo findAid(String aidHex) { // Dummy implementation return new AidInfo(); } public static class AidInfo { private String name = ""; public String getName() { return name; } } } } [V0_FILE]java:file="NfcPaymentSettingsActivity.java" isMerged="true" package com.example.app; import android.app.Activity; import android.content.ComponentName; import android.content.Intent; import android.nfc.cardemulation.CardEmulation; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class NfcPaymentSettingsActivity extends Activity { private CardEmulation cardEmulation; private ComponentName paymentServiceComponent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_nfc_payment_settings); cardEmulation = CardEmulation.getInstance(NfcAdapter.getDefaultAdapter(this)); paymentServiceComponent = new ComponentName(this, PaymentHostApduService.class); TextView statusText = findViewById(R.id.payment_status); Button setDefaultButton = findViewById(R.id.set_default_button); updatePaymentStatus(statusText); setDefaultButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(CardEmulation.ACTION_CHANGE_DEFAULT); intent.putExtra(CardEmulation.EXTRA_CATEGORY, CardEmulation.CATEGORY_PAYMENT); intent.putExtra(CardEmulation.EXTRA_SERVICE_COMPONENT, paymentServiceComponent); startActivityForResult(intent, 0); } }); } @Override protected void onResume() { super.onResume(); updatePaymentStatus((TextView) findViewById(R.id.payment_status)); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); updatePaymentStatus((TextView) findViewById(R.id.payment_status)); } private void updatePaymentStatus(TextView statusText) { boolean isDefault = cardEmulation.isDefaultServiceForCategory( paymentServiceComponent, CardEmulation.CATEGORY_PAYMENT); if (isDefault) { statusText.setText(R.string.default_payment_set); Toast.makeText(this, R.string.default_payment_set, Toast.LENGTH_SHORT).show(); } else { statusText.setText(R.string.default_payment_not_set); } } } [V0_FILE]java:file="PaymentHostApduService.java" isMerged="true" import android.content.Context; import android.content.Intent; import android.nfc.cardemulation.HostApduService; import android.os.Bundle; import android.util.Log; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import java.util.List; public class PaymentHostApduService extends HostApduService { private static final String TAG = "PaymentHostApduService"; // AID for our loyalty card service. private static final String SAMPLE_LOYALTY_CARD_AID = "A0000002471001"; // ISO-Select-Command HEADER for selecting an AID. // Format: [CLA, INS, P1, P2, LC, AID] private static final byte[] SELECT_APDU_HEADER = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xA4, // INS (instruction code) (byte)0x04, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x07 // LC (length of data) }; // "OK" status word sent in response to SELECT command (0x9000) private static final byte[] SELECT_OK_SW = new byte[] { (byte) 0x90, (byte) 0x00 }; // "UNKNOWN" status word sent in response to any other command. private static final byte[] UNKNOWN_CMD_SW = new byte[] { (byte) 0x00, (byte) 0x00 }; // Card related constants private static final byte[] VISA_SELECT_RESPONSE = new byte[]{(byte)0x90, (byte)0x00}; private static final byte[] VISA_GPO_RESPONSE = new byte[]{(byte)0x90, (byte)0x00}; private static final byte[] MASTERCARD_SELECT_RESPONSE = new byte[]{(byte)0x90, (byte)0x00}; private static final byte[] MASTERCARD_GPO_RESPONSE = new byte[]{(byte)0x90, (byte)0x00}; private static final byte[] AMEX_SELECT_RESPONSE = new byte[]{(byte)0x90, (byte)0x00}; private static final byte[] AMEX_GPO_RESPONSE = new byte[]{(byte)0x90, (byte)0x00}; private static final String VISA_AID_PREFIX = "A000000003"; private static final String MASTERCARD_AID_PREFIX = "A000000004"; private static final String AMEX_AID_PREFIX = "A00000002501"; private static final byte[] PPSE_AID = hexToBytes("A0000000041010"); private static final byte[] SELECT_PPSE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xA4, // INS (instruction code) (byte)0x04, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // LC (length of data) (byte)0x32, (byte)0x50, (byte)0x41, (byte)0x59, (byte)0x2E, (byte)0x53, (byte)0x59, (byte)0x53, (byte)0x2E, (byte)0x44, (byte)0x44, (byte)0x46, (byte)0x30, (byte)0x31 }; private static final byte[] GET_PROCESSING_OPTIONS = new byte[] { (byte)0x80, // CLA (class of command) (byte)0xA8, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x02, // Lc (data length) (byte)0x83, (byte)0x00 }; private static final byte[] READ_RECORD = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xB2, // INS (instruction code) (byte)0x01, // P1 (parameter 1) (byte)0x14, // P2 (parameter 2) (byte)0x00 // Lc (data length) }; private static final byte[] APPLICATION_TRANSACTION_COUNTER = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xC0, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0F // Lc (data length) }; private static final byte[] GET_DATA = new byte[] { (byte)0x80, // CLA (class of command) (byte)0xCA, // INS (instruction code) (byte)0x9F, // P1 (parameter 1) (byte)0x15, // P2 (parameter 2) (byte)0x00 // Lc (data length) }; private static final byte[] GENERATE_AC = new byte[] { (byte)0x80, // CLA (class of command) (byte)0xAE, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x23, // Lc (data length) (byte)0x83, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] CREDIT = new byte[] { (byte)0x80, // CLA (class of command) (byte)0x5A, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x03, // Lc (data length) (byte)0x02, (byte)0x00, (byte)0x04 }; private static final byte[] DEBIT = new byte[] { (byte)0x80, // CLA (class of command) (byte)0x5A, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x03, // Lc (data length) (byte)0x02, (byte)0x00, (byte)0x08 }; private static final byte[] PIN = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x20, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x80, // P2 (parameter 2) (byte)0x08, // Lc (data length) (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31 }; private static final byte[] GET_CHALLENGE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x84, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x08 // Lc (data length) }; private static final byte[] INTERNAL_AUTHENTICATE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x88, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x10, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] GET_RESPONSE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xC0, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0F // Lc (data length) }; private static final byte[] READ_BINARY = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xB0, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x00 // Lc (data length) }; private static final byte[] VERIFY = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x20, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x80, // P2 (parameter 2) (byte)0x08, // Lc (data length) (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31, (byte)0x31 }; private static final byte[] PUT_DATA = new byte[] { (byte)0x80, // CLA (class of command) (byte)0xD6, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] UPDATE_BINARY = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xD0, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] APPEND_RECORD = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xE2, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] SEARCH_RECORD = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xA2, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] INCREASE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xA0, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] DECREASE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xA4, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] RESTORE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x14, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] BACKUP = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x18, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] REHABILITATE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x44, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] TERMINATE_DF = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xE4, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] CREATE_DF = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xE0, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] ERASE_BINARY = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x0E, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] PERFORM_SCQL_OPERATION = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x24, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] MANAGE_CHANNEL = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x70, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] ENVELOPE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xC2, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] GET_STATUS = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xF2, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] PERFORM_SECURITY_OPERATION = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x2A, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] SET_GLOBAL_STATUS = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xD8, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] SECURE_MESSAGING = new byte[] { (byte)0x00, // CLA (class of command) (byte)0xDC, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] AUTHENTICATE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x86, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] RESET_RETRY_COUNTER = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x2C, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] ACTIVATE_FILE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x44, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] DEACTIVATE_FILE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x04, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private static final byte[] ENABLE_FILE = new byte[] { (byte)0x00, // CLA (class of command) (byte)0x44, // INS (instruction code) (byte)0x00, // P1 (parameter 1) (byte)0x00, // P2 (parameter 2) (byte)0x0E, // Lc (data length) (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }; private final HashMap cardTypes = new HashMap<>(); private Context context; private static byte[] hexToBytes(String hexString) { int len = hexString.length(); byte[] data = new byte[len / 2]; for (int i = 0; i < len; i += 2) { data[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4) + Character.digit(hexString.charAt(i+1), 16)); } return data; } private void initializeCardTypes() { cardTypes.put("Visa", new CardType( "Visa", hexToBytes("A0000000031010"), VISA_SELECT_RESPONSE, VISA_GPO_RESPONSE )); cardTypes.put("MasterCard", new CardType( "MasterCard", hexToBytes("A0000000041010"), MASTERCARD_SELECT_RESPONSE, MASTERCARD_GPO_RESPONSE )); cardTypes.put("Amex", new CardType( "Amex", hexToBytes("A0000000250101"), AMEX_SELECT_RESPONSE, AMEX_GPO_RESPONSE )); } /** * Initializes the card types using the AID database */ private void initializeCardTypesFromDatabase() { Map aidMap = AidDatabaseHelper.loadAidDatabase(context); for (Map.Entry entry : aidMap.entrySet()) { AidDatabaseHelper.AidInfo aidInfo = entry.getValue(); String aidHex = aidInfo.getAid(); // Skip AIDs that are not payment cards or don't have EMV standard if (!"EMV".equals(aidInfo.getStandard())) { continue; } // Convert hex AID to byte array byte[] aid = hexToBytes(aidHex); // Create a card type for this AID String cardName = aidInfo.getName(); if (cardName.isEmpty()) { cardName = aidInfo.getOrganization(); } // Skip if we already have this card type if (cardTypes.containsKey(cardName)) { continue; } // Create appropriate responses based on the card type byte[] selectResponse; byte[] gpoResponse; if (aidHex.startsWith("A000000003")) { // Visa selectResponse = VISA_SELECT_RESPONSE; gpoResponse = VISA_GPO_RESPONSE; } else if (aidHex.startsWith("A000000004")) { // MasterCard selectResponse = MASTERCARD_SELECT_RESPONSE; gpoResponse = MASTERCARD_GPO_RESPONSE; } else if (aidHex.startsWith("A00000002501")) { // Amex selectResponse = AMEX_SELECT_RESPONSE; gpoResponse = AMEX_GPO_RESPONSE; } else { // Default to Visa for other card types selectResponse = VISA_SELECT_RESPONSE; gpoResponse = VISA_GPO_RESPONSE; } // Add the card type cardTypes.put(cardName, new CardType( cardName, aid, selectResponse, gpoResponse )); Log.d(TAG, "Added card type from database: " + cardName); } } /** * Yapıcı metod */ public PaymentHostApduService() { super(); initializeCardTypes(); // Add this line to initialize card types from the database initializeCardTypesFromDatabase(); } @Override public void onCreate() { super.onCreate(); context = getApplicationContext(); } @Override public byte[] processCommandApdu(byte[] commandApdu, Bundle extras) { Log.i(TAG, "Received APDU: " + bytesToHex(commandApdu)); // If the APDU matches the SELECT AID command for the loyalty card, // send the loyalty card account number. if (Arrays.equals(SELECT_PPSE, commandApdu)) { Log.i(TAG, "Returning PPSE AID."); return SELECT_OK_SW; } if (Arrays.equals(GET_PROCESSING_OPTIONS, commandApdu)) { Log.i(TAG, "Returning GPO."); return SELECT_OK_SW; } if (Arrays.equals(READ_RECORD, commandApdu)) { Log.i(TAG, "Returning READ_RECORD."); return SELECT_OK_SW; } if (Arrays.equals(APPLICATION_TRANSACTION_COUNTER, commandApdu)) { Log.i(TAG, "Returning APPLICATION_TRANSACTION_COUNTER."); return SELECT_OK_SW; } if (Arrays.equals(GET_DATA, commandApdu)) { Log.i(TAG, "Returning GET_DATA."); return SELECT_OK_SW; } if (Arrays.equals(GENERATE_AC, commandApdu)) { Log.i(TAG, "Returning GENERATE_AC."); return SELECT_OK_SW; } if (Arrays.equals(CREDIT, commandApdu)) { Log.i(TAG, "Returning CREDIT."); return SELECT_OK_SW; } if (Arrays.equals(DEBIT, commandApdu)) { Log.i(TAG, "Returning DEBIT."); return SELECT_OK_SW; } if (Arrays.equals(PIN, commandApdu)) { Log.i(TAG, "Returning PIN."); return SELECT_OK_SW; } if (Arrays.equals(GET_CHALLENGE, commandApdu)) { Log.i(TAG, "Returning GET_CHALLENGE."); return SELECT_OK_SW; } if (Arrays.equals(INTERNAL_AUTHENTICATE, commandApdu)) { Log.i(TAG, "Returning INTERNAL_AUTHENTICATE."); return SELECT_OK_SW; } if (Arrays.equals(GET_RESPONSE, commandApdu)) { Log.i(TAG, "Returning GET_RESPONSE."); return SELECT_OK_SW; } if (Arrays.equals(READ_BINARY, commandApdu)) { Log.i(TAG, "Returning READ_BINARY."); return SELECT_OK_SW; } if (Arrays.equals(VERIFY, commandApdu)) { Log.i(TAG, "Returning VERIFY."); return SELECT_OK_SW; } if (Arrays.equals(PUT_DATA, commandApdu)) { Log.i(TAG, "Returning PUT_DATA."); return SELECT_OK_SW; } if (Arrays.equals(UPDATE_BINARY, commandApdu)) { Log.i(TAG, "Returning UPDATE_BINARY."); return SELECT_OK_SW; } if (Arrays.equals(APPEND_RECORD, commandApdu)) { Log.i(TAG, "Returning APPEND_RECORD."); return SELECT_OK_SW; } if (Arrays.equals(SEARCH_RECORD, commandApdu)) { Log.i(TAG, "Returning SEARCH_RECORD."); return SELECT_OK_SW; } if (Arrays.equals(INCREASE, commandApdu)) { Log.i(TAG, "Returning INCREASE."); return SELECT_OK_SW; } if (Arrays.equals(DECREASE, commandApdu)) { Log.i(TAG, "Returning DECREASE."); return SELECT_OK_SW; } if (Arrays.equals(RESTORE, commandApdu)) { Log.i(TAG, "Returning RESTORE."); return SELECT_OK_SW; } if (Arrays.equals(BACKUP, commandApdu)) { Log.i(TAG, "Returning BACKUP."); return SELECT_OK_SW; } if (Arrays.equals(REHABILITATE, commandApdu)) { Log.i(TAG, "Returning REHABILITATE."); return SELECT_OK_SW; } if (Arrays.equals(TERMINATE_DF, commandApdu)) { Log.i(TAG, "Returning TERMINATE_DF."); return SELECT_OK_SW; } if (Arrays.equals(CREATE_DF, commandApdu)) { Log.i(TAG, "Returning CREATE_DF."); return SELECT_OK_SW; } if (Arrays.equals(ERASE_BINARY, commandApdu)) { Log.i(TAG, "Returning ERASE_BINARY."); return SELECT_OK_SW; } if (Arrays.equals(PERFORM_SCQL_OPERATION, commandApdu)) { Log.i(TAG, "Returning PERFORM_SCQL_OPERATION."); return SELECT_OK_SW; } if (Arrays.equals(MANAGE_CHANNEL, commandApdu)) { Log.i(TAG, "Returning MANAGE_CHANNEL."); return SELECT_OK_SW; } if (Arrays.equals(ENVELOPE, commandApdu)) { Log.i(TAG, "Returning ENVELOPE."); return SELECT_OK_SW; } if (Arrays.equals(GET_STATUS, commandApdu)) { Log.i(TAG, "Returning GET_STATUS."); return SELECT_OK_SW; } if (Arrays.equals(PERFORM_SECURITY_OPERATION, commandApdu)) { Log.i(TAG, "Returning PERFORM_SECURITY_OPERATION."); return SELECT_OK_SW; } if (Arrays.equals(SET_GLOBAL_STATUS, commandApdu)) { Log.i(TAG, "Returning SET_GLOBAL_STATUS."); return SELECT_OK_SW; } if (Arrays.equals(SECURE_MESSAGING, commandApdu)) { Log.i(TAG, "Returning SECURE_MESSAGING."); return SELECT_OK_SW; } if (Arrays.equals(AUTHENTICATE, commandApdu)) { Log.i(TAG, "Returning AUTHENTICATE."); return SELECT_OK_SW; } if (Arrays.equals(RESET_RETRY_COUNTER, commandApdu)) { Log.i(TAG, "Returning RESET_RETRY_COUNTER."); return SELECT_OK_SW; } if (Arrays.equals(ACTIVATE_FILE, commandApdu)) { Log.i(TAG, "Returning ACTIVATE_FILE."); return SELECT_OK_SW; } if (Arrays.equals(DEACTIVATE_FILE, commandApdu)) { Log.i(TAG, "Returning DEACTIVATE_FILE."); return SELECT_OK_SW; } if (Arrays.equals(ENABLE_FILE, commandApdu)) { Log.i(TAG, "Returning ENABLE_FILE."); return SELECT_OK_SW; } String cardName = null; for (Map.Entry entry : cardTypes.entrySet()) { CardType cardType = entry.getValue(); if (Arrays.equals(Arrays.copyOfRange(commandApdu, 0, SELECT_APDU_HEADER.length + cardType.aid.length), concatArrays(SELECT_APDU_HEADER, cardType.aid))) { cardName = cardType.name; break; } } if (cardName != null) { Log.i(TAG, "Returning " + cardName + " SELECT AID."); return SELECT_OK_SW; } else { Log.i(TAG, "Card not found"); } // Our loyalty card only supports the SELECT AID command, so return UNKNOWN_CMD_SW. return UNKNOWN_CMD_SW; } @Override public void onDeactivated(int reason) { Log.i(TAG, "Deactivated: " + reason); } private static String bytesToHex(byte[] bytes) { StringBuilder sb = new StringBuilder(); for (byte b : bytes) { sb.append(String.format("%02X", b)); } return sb.toString(); } private static byte[] concatArrays(byte[] first, byte[]... rest) { int totalLength = first.length; for (byte[] array : rest) { totalLength += array.length; } byte[] result = Arrays.copyOf(first, totalLength); int offset = first.length; for (byte[] array : rest) { System.arraycopy(array, 0, result, offset, array.length); offset += array.length; } return result; } private static class CardType { String name; byte[] aid; byte[] selectResponse; byte[] gpoResponse; public CardType(String name, byte[] aid, byte[] selectResponse, byte[] gpoResponse) { this.name = name; this.aid = aid; this.selectResponse = selectResponse; this.gpoResponse = gpoResponse; } } } [V0_FILE]java:file="PreferenceManager.java" isMerged="true" package com.example.nfcpayment; import android.content.Context; import android.content.SharedPreferences; /** * Uygulama ayarlarını yönetmek için yardımcı sınıf. */ public class PreferenceManager { private static final String PREF_NAME = "NfcPaymentPrefs"; /** * Boolean değer kaydetme * * @param context Uygulama bağlamı * @param key Anahtar * @param value Değer */ public static void saveBoolean(Context context, String key, boolean value) { SharedPreferences prefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = prefs.edit(); editor.putBoolean(key, value); editor.apply(); } /** * Boolean değer alma * * @param context Uygulama bağlamı * @param key Anahtar * @param defaultValue Varsayılan değer * @return Kaydedilen değer veya varsayılan değer */ public static boolean getBoolean(Context context, String key, boolean defaultValue) { SharedPreferences prefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE); return prefs.getBoolean(key, defaultValue); } /** * String değer kaydetme * * @param context Uygulama bağlamı * @param key Anahtar * @param value Değer */ public static void saveString(Context context, String key, String value) { SharedPreferences prefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = prefs.edit(); editor.putString(key, value); editor.apply(); } /** * String değer alma * * @param context Uygulama bağlamı * @param key Anahtar * @param defaultValue Varsayılan değer * @return Kaydedilen değer veya varsayılan değer */ public static String getString(Context context, String key, String defaultValue) { SharedPreferences prefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE); return prefs.getString(key, defaultValue); } } [V0_FILE]markdown:file="README.md" isMerged="true" # Nfc payment system development *Automatically synced with your [v0.dev](https://v0.dev) deployments* [![Deployed on Vercel](https://img.shields.io/badge/Deployed%20on-Vercel-black?style=for-the-badge&logo=vercel)](https://vercel.com/anonim11s-projects/v0-nfc-payment-system-development) [![Built with v0](https://img.shields.io/badge/Built%20with-v0.dev-black?style=for-the-badge)](https://v0.dev/chat/projects/AklTf1jubKa) ## Overview This repository will stay in sync with your deployed chats on [v0.dev](https://v0.dev). Any changes you make to your deployed app will be automatically pushed to this repository from [v0.dev](https://v0.dev). ## Deployment Your project is live at: **[https://vercel.com/anonim11s-projects/v0-nfc-payment-system-development](https://vercel.com/anonim11s-projects/v0-nfc-payment-system-development)** ## Build your app Continue building your app on: **[https://v0.dev/chat/projects/AklTf1jubKa](https://v0.dev/chat/projects/AklTf1jubKa)** ## How It Works 1. Create and modify your project using [v0.dev](https://v0.dev) 2. Deploy your chats from the v0 interface 3. Changes are automatically pushed to this repository 4. Vercel deploys the latest version from this repository [V0_FILE]java:file="SetCardActivity.java" isMerged="true" package com.example.nfcpayment; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Spinner; import android.widget.Toast; public class SetCardActivity extends Activity { private EditText cardNumberEdit; private EditText cardHolderEdit; private EditText cardExpiryEdit; private RadioGroup cardTypeGroup; private RadioButton creditRadio; private RadioButton debitRadio; private Spinner cardBrandSpinner; private Button saveButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_set_card); // UI bileşenlerini başlat cardNumberEdit = findViewById(R.id.card_number); cardHolderEdit = findViewById(R.id.name_on_card); cardExpiryEdit = findViewById(R.id.card_expiration); cardTypeGroup = findViewById(R.id.type); creditRadio = findViewById(R.id.radio_Credit); debitRadio = findViewById(R.id.radio_Debit); cardBrandSpinner = findViewById(R.id.spinner1); saveButton = findViewById(R.id.gravar); // Mevcut kart bilgilerini yükle loadCardInfo(); // Kaydet butonu için listener saveButton.setOnClickListener(v -> saveCardInfo()); } /** * Mevcut kart bilgilerini yükler */ private void loadCardInfo() { String cardNumber = PreferenceManager.getString(this, "card_number", ""); String cardHolder = PreferenceManager.getString(this, "card_holder_name", ""); String expiryDate = PreferenceManager.getString(this, "expiry_date", ""); boolean isCredit = PreferenceManager.getBoolean(this, "is_credit", true); int cardBrandPosition = PreferenceManager.getInt(this, "card_brand_position", 0); cardNumberEdit.setText(cardNumber); cardHolderEdit.setText(cardHolder); cardExpiryEdit.setText(expiryDate); if (isCredit) { creditRadio.setChecked(true); } else { debitRadio.setChecked(true); } cardBrandSpinner.setSelection(cardBrandPosition); } /** * Kart bilgilerini kaydeder */ private void saveCardInfo() { String cardNumber = cardNumberEdit.getText().toString().trim(); String cardHolder = cardHolderEdit.getText().toString().trim().toUpperCase(); String expiryDate = cardExpiryEdit.getText().toString().trim(); boolean isCredit = creditRadio.isChecked(); int cardBrandPosition = cardBrandSpinner.getSelectedItemPosition(); // Kart numarasını doğrula if (!isValidCardNumber(cardNumber)) { Toast.makeText(this, "Geçersiz kart numarası", Toast.LENGTH_SHORT).show(); return; } // Kart sahibi adını doğrula if (cardHolder.isEmpty()) { Toast.makeText(this, "Kart sahibi adı boş olamaz", Toast.LENGTH_SHORT).show(); return; } // Son kullanma tarihini doğrula if (!isValidExpiryDate(expiryDate)) { Toast.makeText(this, "Geçersiz son kullanma tarihi (MM/YY formatında olmalı)", Toast.LENGTH_SHORT).show(); return; } // Kart bilgilerini kaydet PreferenceManager.saveString(this, "card_number", cardNumber); PreferenceManager.saveString(this, "card_holder_name", cardHolder); PreferenceManager.saveString(this, "expiry_date", expiryDate); PreferenceManager.saveBoolean(this, "is_credit", isCredit); PreferenceManager.saveInt(this, "card_brand_position", cardBrandPosition); // Track 1 formatı için son kullanma tarihini dönüştür (YYMM formatına) String[] expiryParts = expiryDate.split("/"); if (expiryParts.length == 2) { String track1ExpiryDate = expiryParts[1] + expiryParts[0]; // YYMM formatı PreferenceManager.saveString(this, "track1_expiry_date", track1ExpiryDate); } Toast.makeText(this, "Kart bilgileri kaydedildi", Toast.LENGTH_SHORT).show(); finish(); } /** * Kart numarasının geçerli olup olmadığını kontrol eder * * @param cardNumber Kart numarası * @return Geçerli ise true, değilse false */ private boolean isValidCardNumber(String cardNumber) { // Boşlukları kaldır cardNumber = cardNumber.replaceAll("\\s+", ""); // Uzunluk kontrolü (13-19 hane) if (cardNumber.length() < 13 || cardNumber.length() > 19) { return false; } // Sadece rakam kontrolü if (!cardNumber.matches("\\d+")) { return false; } // Luhn algoritması ile doğrulama int sum = 0; boolean alternate = false; for (int i = cardNumber.length() - 1; i >= 0; i--) { int n = Integer.parseInt(cardNumber.substring(i, i + 1)); if (alternate) { n *= 2; if (n > 9) { n = (n % 10) + 1; } } sum += n; alternate = !alternate; } return (sum % 10 == 0); } /** * Son kullanma tarihinin geçerli olup olmadığını kontrol eder * * @param expiryDate Son kullanma tarihi * @return Geçerli ise true, değilse false */ private boolean isValidExpiryDate(String expiryDate) { // MM/YY formatı kontrolü if (!expiryDate.matches("\\d{2}/\\d{2}")) { return false; } String[] parts = expiryDate.split("/"); int month = Integer.parseInt(parts[0]); int year = Integer.parseInt(parts[1]) + 2000; // 2 haneli yılı 4 haneye çevir // Ay kontrolü (1-12) if (month < 1 || month > 12) { return false; } // Şu anki tarih java.util.Calendar calendar = java.util.Calendar.getInstance(); int currentYear = calendar.get(java.util.Calendar.YEAR); int currentMonth = calendar.get(java.util.Calendar.MONTH) + 1; // 0-11 aralığından 1-12 aralığına çevir // Geçmiş tarih kontrolü if (year < currentYear || (year == currentYear && month < currentMonth)) { return false; } // Çok uzak gelecek kontrolü (10 yıldan fazla) if (year > currentYear + 10) { return false; } return true; } } [V0_FILE]java:file="Track1Activity.java" isMerged="true" package com.example.nfcpayment; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; public class Track1Activity extends Activity { private EditText cardNumberEdit; private EditText cardHolderEdit; private EditText expiryDateEdit; private EditText serviceCodeEdit; private EditText discretionaryDataEdit; private Spinner cardTypeSpinner; private TextView previewText; private Button generateButton; private Button saveButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_track1); // UI bileşenlerini başlat cardNumberEdit = findViewById(R.id.card_number_edit); cardHolderEdit = findViewById(R.id.card_holder_edit); expiryDateEdit = findViewById(R.id.expiry_date_edit); serviceCodeEdit = findViewById(R.id.service_code_edit); discretionaryDataEdit = findViewById(R.id.discretionary_data_edit); cardTypeSpinner = findViewById(R.id.card_type_spinner); previewText = findViewById(R.id.preview_text); generateButton = findViewById(R.id.generate_button); saveButton = findViewById(R.id.save_button); // Mevcut kart bilgilerini yükle loadCardInfo(); // Oluştur butonu için listener generateButton.setOnClickListener(v -> generateTrack1Data()); // Kaydet butonu için listener saveButton.setOnClickListener(v -> saveTrack1Data()); } /** * Mevcut kart bilgilerini yükler */ private void loadCardInfo() { String cardNumber = PreferenceManager.getString(this, "card_number", ""); String cardHolder = PreferenceManager.getString(this, "card_holder_name", ""); String expiryDate = PreferenceManager.getString(this, "expiry_date", ""); String serviceCode = PreferenceManager.getString(this, "service_code", "101"); String discretionaryData = PreferenceManager.getString(this, "discretionary_data", "00000000000000"); int cardTypePosition = PreferenceManager.getInt(this, "card_brand_position", 0); // Expiry date formatını MM/YY'den YYMM'e dönüştür if (expiryDate.contains("/")) { String[] parts = expiryDate.split("/"); if (parts.length == 2) { expiryDate = parts[1] + parts[0]; } } cardNumberEdit.setText(cardNumber); cardHolderEdit.setText(cardHolder); expiryDateEdit.setText(expiryDate); serviceCodeEdit.setText(serviceCode); discretionaryDataEdit.setText(discretionaryData); cardTypeSpinner.setSelection(cardTypePosition); // Mevcut Track1 verisini göster String track1Data = PreferenceManager.getString(this, "track1_data", ""); if (!track1Data.isEmpty()) { previewText.setText(track1Data); } } /** * Track1 verisi oluşturur */ private void generateTrack1Data() { String cardNumber = cardNumberEdit.getText().toString().trim(); String cardHolder = cardHolderEdit.getText().toString().trim().toUpperCase(); String expiryDate = expiryDateEdit.getText().toString().trim(); String serviceCode = serviceCodeEdit.getText().toString().trim(); String discretionaryData = discretionaryDataEdit.getText().toString().trim(); // Kart numarasını doğrula if (!isValidCardNumber(cardNumber)) { Toast.makeText(this, "Geçersiz kart numarası", Toast.LENGTH_SHORT).show(); return; } // Kart sahibi adını doğrula if (cardHolder.isEmpty()) { Toast.makeText(this, "Kart sahibi adı boş olamaz", Toast.LENGTH_SHORT).show(); return; } // Son kullanma tarihini doğrula if (expiryDate.length() != 4) { Toast.makeText(this, "Son kullanma tarihi 4 haneli olmalı (YYMM)", Toast.LENGTH_SHORT).show(); return; } // Servis kodunu doğrula if (serviceCode.length() != 3) { Toast.makeText(this, "Servis kodu 3 haneli olmalı", Toast.LENGTH_SHORT).show(); return; } // Track1 verisi oluştur // Format: %B[PAN]^[Name]^[ExpiryDate][ServiceCode][DiscretionaryData]? StringBuilder track1 = new StringBuilder(); track1.append("%B"); track1.append(cardNumber); track1.append("^"); track1.append(cardHolder); track1.append("^"); track1.append(expiryDate); track1.append(serviceCode); track1.append(discretionaryData); track1.append("?"); // Önizleme göster previewText.setText(track1.toString()); } /** * Track1 verisini kaydeder */ private void saveTrack1Data() { String track1Data = previewText.getText().toString().trim(); if (track1Data.isEmpty() || !track1Data.startsWith("%B") || !track1Data.endsWith("?")) { Toast.makeText(this, "Lütfen önce Track1 verisi oluşturun", Toast.LENGTH_SHORT).show(); return; } // Track1 verisini kaydet PreferenceManager.saveString(this, "track1_data", track1Data); // Kart bilgilerini de kaydet String cardNumber = cardNumberEdit.getText().toString().trim(); String cardHolder = cardHolderEdit.getText().toString().trim().toUpperCase(); String expiryDate = expiryDateEdit.getText().toString().trim(); String serviceCode = serviceCodeEdit.getText().toString().trim(); String discretionaryData = discretionaryDataEdit.getText().toString().trim(); int cardTypePosition = cardTypeSpinner.getSelectedItemPosition(); PreferenceManager.saveString(this, "card_number", cardNumber); PreferenceManager.saveString(this, "card_holder_name", cardHolder); PreferenceManager.saveString(this, "track1_expiry_date", expiryDate); PreferenceManager.saveString(this, "service_code", serviceCode); PreferenceManager.saveString(this, "discretionary_data", discretionaryData); PreferenceManager.saveInt(this, "card_brand_position", cardTypePosition); // MM/YY formatında expiry date oluştur ve kaydet if (expiryDate.length() == 4) { String month = expiryDate.substring(2); String year = expiryDate.substring(0, 2); PreferenceManager.saveString(this, "expiry_date", month + "/" + year); } Toast.makeText(this, "Track1 verisi kaydedildi", Toast.LENGTH_SHORT).show(); finish(); } /** * Kart numarasının geçerli olup olmadığını kontrol eder * * @param cardNumber Kart numarası * @return Geçerli ise true, değilse false */ private boolean isValidCardNumber(String cardNumber) { // Boşlukları kaldır cardNumber = cardNumber.replaceAll("\\s+", ""); // Uzunluk kontrolü (13-19 hane) if (cardNumber.length() < 13 || cardNumber.length() > 19) { return false; } // Sadece rakam kontrolü if (!cardNumber.matches("\\d+")) { return false; } // Luhn algoritması ile doğrulama int sum = 0; boolean alternate = false; for (int i = cardNumber.length() - 1; i >= 0; i--) { int n = Integer.parseInt(cardNumber.substring(i, i + 1)); if (alternate) { n *= 2; if (n > 9) { n = (n % 10) + 1; } } sum += n; alternate = !alternate; } return (sum % 10 == 0); } } [V0_FILE]java:file="Track1Fragment.java" isMerged="true" package com.example.nfcpayment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import androidx.fragment.app.Fragment; public class Track1Fragment extends Fragment { private EditText cardNumberEdit; private EditText cardHolderEdit; private EditText expiryDateEdit; private EditText serviceCodeEdit; private EditText discretionaryDataEdit; private Spinner cardTypeSpinner; private TextView previewText; private Button generateButton; private Button saveButton; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_track1, container, false); // UI bileşenlerini başlat cardNumberEdit = view.findViewById(R.id.card_number_edit); cardHolderEdit = view.findViewById(R.id.card_holder_edit); expiryDateEdit = view.findViewById(R.id.expiry_date_edit); serviceCodeEdit = view.findViewById(R.id.service_code_edit); discretionaryDataEdit = view.findViewById(R.id.discretionary_data_edit); cardTypeSpinner = view.findViewById(R.id.card_type_spinner); previewText = view.findViewById(R.id.preview_text); generateButton = view.findViewById(R.id.generate_button); saveButton = view.findViewById(R.id.save_button); // Mevcut kart bilgilerini yükle loadCardInfo(); // Oluştur butonu için listener generateButton.setOnClickListener(v -> generateTrack1Data()); // Kaydet butonu için listener saveButton.setOnClickListener(v -> saveTrack1Data()); return view; } @Override public void onResume() { super.onResume(); loadCardInfo(); } /** * Mevcut kart bilgilerini yükler */ private void loadCardInfo() { String cardNumber = PreferenceManager.getString(getActivity(), "card_number", ""); String cardHolder = PreferenceManager.getString(getActivity(), "card_holder_name", ""); String expiryDate = PreferenceManager.getString(getActivity(), "expiry_date", ""); String serviceCode = PreferenceManager.getString(getActivity(), "service_code", "101"); String discretionaryData = PreferenceManager.getString(getActivity(), "discretionary_data", "00000000000000"); int cardTypePosition = PreferenceManager.getInt(getActivity(), "card_brand_position", 0); // Expiry date formatını MM/YY'den YYMM'e dönüştür if (expiryDate.contains("/")) { String[] parts = expiryDate.split("/"); if (parts.length == 2) { expiryDate = parts[1] + parts[0]; } } cardNumberEdit.setText(cardNumber); cardHolderEdit.setText(cardHolder); expiryDateEdit.setText(expiryDate); serviceCodeEdit.setText(serviceCode); discretionaryDataEdit.setText(discretionaryData); cardTypeSpinner.setSelection(cardTypePosition); // Mevcut Track1 verisini göster String track1Data = PreferenceManager.getString(getActivity(), "track1_data", ""); if (!track1Data.isEmpty()) { previewText.setText(track1Data); } } /** * Track1 verisi oluşturur */ private void generateTrack1Data() { String cardNumber = cardNumberEdit.getText().toString().trim(); String cardHolder = cardHolderEdit.getText().toString().trim().toUpperCase(); String expiryDate = expiryDateEdit.getText().toString().trim(); String serviceCode = serviceCodeEdit.getText().toString().trim(); String discretionaryData = discretionaryDataEdit.getText().toString().trim(); // Kart numarasını doğrula if (!isValidCardNumber(cardNumber)) { Toast.makeText(getActivity(), "Geçersiz kart numarası", Toast.LENGTH_SHORT).show(); return; } // Kart sahibi adını doğrula if (cardHolder.isEmpty()) { Toast.makeText(getActivity(), "Kart sahibi adı boş olamaz", Toast.LENGTH_SHORT).show(); return; } // Son kullanma tarihini doğrula if (expiryDate.length() != 4) { Toast.makeText(getActivity(), "Son kullanma tarihi 4 haneli olmalı (YYMM)", Toast.LENGTH_SHORT).show(); return; } // Servis kodunu doğrula if (serviceCode.length() != 3) { Toast.makeText(getActivity(), "Servis kodu 3 haneli olmalı", Toast.LENGTH_SHORT).show(); return; } // Track1 verisi oluştur // Format: %B[PAN]^[Name]^[ExpiryDate][ServiceCode][DiscretionaryData]? StringBuilder track1 = new StringBuilder(); track1.append("%B"); track1.append(cardNumber); track1.append("^"); track1.append(cardHolder); track1.append("^"); track1.append(expiryDate); track1.append(serviceCode); track1.append(discretionaryData); track1.append("?"); // Önizleme göster previewText.setText(track1.toString()); } /** * Track1 verisini kaydeder */ private void saveTrack1Data() { String track1Data = previewText.getText().toString().trim(); if (track1Data.isEmpty() || !track1Data.startsWith("%B") || !track1Data.endsWith("?")) { Toast.makeText(getActivity(), "Lütfen önce Track1 verisi oluşturun", Toast.LENGTH_SHORT).show(); return; } // Track1 verisini kaydet PreferenceManager.saveString(getActivity(), "track1_data", track1Data); // Kart bilgilerini de kaydet String cardNumber = cardNumberEdit.getText().toString().trim(); String cardHolder = cardHolderEdit.getText().toString().trim().toUpperCase(); String expiryDate = expiryDateEdit.getText().toString().trim(); String serviceCode = serviceCodeEdit.getText().toString().trim(); String discretionaryData = discretionaryDataEdit.getText().toString().trim(); int cardTypePosition = cardTypeSpinner.getSelectedItemPosition(); PreferenceManager.saveString(getActivity(), "card_number", cardNumber); PreferenceManager.saveString(getActivity(), "card_holder_name", cardHolder); PreferenceManager.saveString(getActivity(), "track1_expiry_date", expiryDate); PreferenceManager.saveString(getActivity(), "service_code", serviceCode); PreferenceManager.saveString(getActivity(), "discretionary_data", discretionaryData); PreferenceManager.saveInt(getActivity(), "card_brand_position", cardTypePosition); // MM/YY formatında expiry date oluştur ve kaydet if (expiryDate.length() == 4) { String month = expiryDate.substring(2); String year = expiryDate.substring(0, 2); PreferenceManager.saveString(getActivity(), "expiry_date", month + "/" + year); } Toast.makeText(getActivity(), "Track1 verisi kaydedildi", Toast.LENGTH_SHORT).show(); } /** * Kart numarasının geçerli olup olmadığını kontrol eder * * @param cardNumber Kart numarası * @return Geçerli ise true, değilse false */ private boolean isValidCardNumber(String cardNumber) { // Boşlukları kaldır cardNumber = cardNumber.replaceAll("\\s+", ""); // Uzunluk kontrolü (13-19 hane) if (cardNumber.length() < 13 || cardNumber.length() > 19) { return false; } // Sadece rakam kontrolü if (!cardNumber.matches("\\d+")) { return false; } // Luhn algoritması ile doğrulama int sum = 0; boolean alternate = false; for (int i = cardNumber.length() - 1; i >= 0; i--) { int n = Integer.parseInt(cardNumber.substring(i, i + 1)); if (alternate) { n *= 2; if (n > 9) { n = (n % 10) + 1; } } sum += n; alternate = !alternate; } return (sum % 10 == 0); } } [V0_FILE]java:file="TrackDataHostApduService.java" isMerged="true" package com.example.nfcpayment; import android.content.Context; import android.nfc.cardemulation.HostApduService; import android.os.Bundle; import android.util.Log; import org.json.JSONException; import org.json.JSONObject; import java.io.IOException; import java.nio.charset.StandardCharsets; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import okhttp3.MediaType; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.RequestBody; import okhttp3.Response; /** * Track 1 verilerini kullanarak NFC ödeme işlemlerini gerçekleştiren HCE servisi. * Bu servis, gelen APDU komutlarını işler ve uygun Track 1 verilerini döndürür. * Ayrıca, APDU komutlarını bir bulut sunucusuna göndererek yanıtları alabilir. */ public class TrackDataHostApduService extends HostApduService { private static final String TAG = "TrackDataHCE"; // APDU Komut Tipleri private static final byte CLA_ISO7816 = (byte) 0x00; private static final byte INS_SELECT = (byte) 0xA4; private static final byte INS_READ_RECORD = (byte) 0xB2; private static final byte INS_GET_PROCESSING_OPTIONS = (byte) 0xA8; // APDU Yanıt Kodları private static final byte[] SW_SUCCESS = {(byte) 0x90, (byte) 0x00}; // Başarılı işlem private static final byte[] SW_UNKNOWN = {(byte) 0x6F, (byte) 0x00}; // Bilinmeyen hata private static final byte[] SW_COMMAND_NOT_ALLOWED = {(byte) 0x69, (byte) 0x86}; // Komut izni yok private static final byte[] SW_INS_NOT_SUPPORTED = {(byte) 0x6D, (byte) 0x00}; // Desteklenmeyen komut private static final byte[] SW_FILE_NOT_FOUND = {(byte) 0x6A, (byte) 0x82}; // Dosya bulunamadı // Kart AID'leri (Application Identifiers) private static final byte[] VISA_AID = {(byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x03, (byte) 0x10, (byte) 0x10}; private static final byte[] MASTERCARD_AID = {(byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x04, (byte) 0x10, (byte) 0x10}; private static final byte[] AMEX_AID = {(byte) 0xA0, (byte) 0x 0x04, (byte) 0x10, (byte) 0x10}; private static final byte[] AMEX_AID = {(byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x25, (byte) 0x01}; private static final byte[] DISCOVER_AID = {(byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x65, (byte) 0x10, (byte) 0x10}; private static final byte[] JCB_AID = {(byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x65, (byte) 0x10, (byte) 0x10}; private static final byte[] PPSE_AID = {(byte) 0x32, (byte) 0x50, (byte) 0x41, (byte) 0x59, (byte) 0x2E, (byte) 0x53, (byte) 0x59, (byte) 0x53, (byte) 0x2E, (byte) 0x44, (byte) 0x44, (byte) 0x46, (byte) 0x30, (byte) 0x31}; // Track 1 Veri Formatları private static final String VISA_TRACK1_FORMAT = "%%B%s^%s^%s101000000000000000000000?"; private static final String MASTERCARD_TRACK1_FORMAT = "%%B%s^%s^%s201000000000000000000000?"; private static final String AMEX_TRACK1_FORMAT = "%%B%s^%s^%s301000000000000000000000?"; // Bulut sunucu URL'si private static final String CLOUD_SERVER_URL = "https://your-cloud-server.com/apdu"; // HTTP istemcisi private final OkHttpClient httpClient = new OkHttpClient(); // Asenkron işlemler için ExecutorService private final ExecutorService executor = Executors.newSingleThreadExecutor(); // Seçilen kart tipi private String selectedCardType = null; // Kart tipi haritası private final Map cardTypes = new HashMap<>(); // Uygulama bağlamı private Context context; /** * Yapıcı metod */ public TrackDataHostApduService() { super(); initializeCardTypes(); } /** * Kart tiplerini başlatan metod. * Yeni kart tipleri eklemek için bu metodu genişletin. */ private void initializeCardTypes() { // Visa kart tipi cardTypes.put("VISA", new CardType( "VISA", VISA_AID, createTrack1Data(VISA_TRACK1_FORMAT, "4111111111111111", "JOHN DOE", "2412") )); // MasterCard kart tipi cardTypes.put("MASTERCARD", new CardType( "MASTERCARD", MASTERCARD_AID, createTrack1Data(MASTERCARD_TRACK1_FORMAT, "5555555555554444", "JANE SMITH", "2512") )); // Amex kart tipi cardTypes.put("AMEX", new CardType( "AMEX", AMEX_AID, createTrack1Data(AMEX_TRACK1_FORMAT, "378282246310005", "ROBERT BROWN", "2612") )); // Diğer kart tipleri buraya eklenebilir // Örnek: // cardTypes.put("DISCOVER", new CardType(...)); // cardTypes.put("JCB", new CardType(...)); } /** * Track 1 verisi oluşturan yardımcı metod * * @param format Track 1 formatı * @param cardNumber Kart numarası * @param cardHolderName Kart sahibi adı * @param expiryDate Son kullanma tarihi (YYMM formatında) * @return Track 1 verisi */ private byte[] createTrack1Data(String format, String cardNumber, String cardHolderName, String expiryDate) { String track1 = String.format(format, cardNumber, cardHolderName, expiryDate); return track1.getBytes(StandardCharsets.UTF_8); } @Override public void onCreate() { super.onCreate(); context = this; Log.d(TAG, "TrackDataHostApduService created"); // Kullanıcı tarafından kaydedilmiş Track1 verisi varsa, kart tiplerini güncelle updateCardTypesFromPreferences(); } /** * Kullanıcı tarafından kaydedilmiş Track1 verisini kullanarak kart tiplerini günceller */ private void updateCardTypesFromPreferences() { String track1Data = PreferenceManager.getString(context, "track1_data", ""); if (track1Data != null && !track1Data.isEmpty()) { String cardNumber = PreferenceManager.getString(context, "card_number", ""); String cardHolderName = PreferenceManager.getString(context, "card_holder_name", ""); String expiryDate = PreferenceManager.getString(context, "track1_expiry_date", ""); if (!cardNumber.isEmpty() && !cardHolderName.isEmpty() && !expiryDate.isEmpty()) { // Kart tipini belirle String cardType = "VISA"; // Varsayılan if (cardNumber.startsWith("4")) { cardType = "VISA"; } else if (cardNumber.startsWith("5")) { cardType = "MASTERCARD"; } else if (cardNumber.startsWith("3")) { cardType = "AMEX"; } // Kart tipini güncelle cardTypes.put(cardType, new CardType( cardType, getAidForCardType(cardType), track1Data.getBytes(StandardCharsets.UTF_8) )); Log.d(TAG, "Updated card type from preferences: " + cardType); } } } /** * Kart tipine göre AID döndürür */ private byte[] getAidForCardType(String cardType) { switch (cardType) { case "VISA": return VISA_AID; case "MASTERCARD": return MASTERCARD_AID; case "AMEX": return AMEX_AID; default: return VISA_AID; } } /** * NFC terminalinden gelen APDU komutlarını işleyen metod. * Bu metod, gelen komutu analiz eder ve uygun yanıtı döndürür. * * @param commandApdu Gelen APDU komutu * @param extras Ek bilgiler * @return İşlenmiş APDU yanıtı */ @Override public byte[] processCommandApdu(byte[] commandApdu, Bundle extras) { Log.d(TAG, "Received APDU: " + bytesToHex(commandApdu)); if (commandApdu == null || commandApdu.length < 4) { return SW_UNKNOWN; } byte cla = commandApdu[0]; byte ins = commandApdu[1]; // Yerel işleme mi yoksa bulut işleme mi kullanılacak? boolean useCloudProcessing = PreferenceManager.getBoolean(context, "use_cloud_processing", true); if (useCloudProcessing) { // Bulut sunucusuna APDU komutunu gönder ve yanıtı al return processApduInCloud(commandApdu); } else { // Yerel olarak APDU komutunu işle return processApduLocally(commandApdu, cla, ins); } } /** * APDU komutunu yerel olarak işleyen metod. * * @param commandApdu Gelen APDU komutu * @param cla CLA baytı * @param ins INS baytı * @return İşlenmiş APDU yanıtı */ private byte[] processApduLocally(byte[] commandApdu, byte cla, byte ins) { // SELECT komutu (AID seçimi) if (cla == CLA_ISO7816 && ins == INS_SELECT) { return processSelectCommand(commandApdu); } // READ RECORD komutu (Track verilerini okuma) if (cla == CLA_ISO7816 && ins == INS_READ_RECORD) { return processReadRecordCommand(); } // GET PROCESSING OPTIONS komutu if (cla == CLA_ISO7816 && ins == INS_GET_PROCESSING_OPTIONS) { return processGetProcessingOptions(); } // Diğer komutlar için genişletilebilir // Örnek: // if (cla == ... && ins == ...) { // return processCustomCommand(commandApdu); // } // Desteklenmeyen komut return SW_INS_NOT_SUPPORTED; } /** * SELECT komutunu işleyen metod. * Bu metod, gelen SELECT komutundaki AID'yi analiz eder ve uygun kart tipini seçer. * * @param commandApdu SELECT komutu * @return SELECT komutuna uygun yanıt */ private byte[] processSelectCommand(byte[] commandApdu) { // AID'yi çıkar if (commandApdu.length < 6) { return SW_UNKNOWN; } int aidLength = commandApdu[4]; if (commandApdu.length < 5 + aidLength) { return SW_UNKNOWN; } byte[] aid = Arrays.copyOfRange(commandApdu, 5, 5 + aidLength); // PPSE seçimi if (Arrays.equals(aid, PPSE_AID)) { Log.d(TAG, "PPSE selected"); // PPSE yanıtı, kullanılabilir ödeme uygulamalarını listeler byte[] ppseResponse = { (byte) 0x6F, (byte) 0x23, // FCI Template (byte) 0x84, (byte) 0x0E, // DF Name (byte) 0x32, (byte) 0x50, (byte) 0x41, (byte) 0x59, (byte) 0x2E, (byte) 0x53, (byte) 0x59, (byte) 0x53, (byte) 0x2E, (byte) 0x44, (byte) 0x44, (byte) 0x46, (byte) 0x30, (byte) 0x31, (byte) 0xA5, (byte) 0x11, // FCI Proprietary Template (byte) 0xBF, (byte) 0x0C, (byte) 0x0E, // FCI Issuer Discretionary Data (byte) 0x61, (byte) 0x0C, // Directory Entry (byte) 0x4F, (byte) 0x07, // ADF Name (byte) 0xA0, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x03, (byte) 0x10, (byte) 0x10, // Visa AID (byte) 0x87, (byte) 0x01, (byte) 0x01, // Priority (byte) 0x90, (byte) 0x00 // SW_SUCCESS }; return ppseResponse; } // AID'ye göre kart tipini belirle for (CardType cardType : cardTypes.values()) { if (Arrays.equals(aid, cardType.getAid())) { selectedCardType = cardType.getName(); Log.d(TAG, "Selected card type: " + selectedCardType); // Kart tipine göre SELECT yanıtı oluştur byte[] selectResponse = createSelectResponse(cardType); return selectResponse; } } // Desteklenmeyen AID selectedCardType = null; return SW_FILE_NOT_FOUND; } /** * Kart tipine göre SELECT yanıtı oluşturan metod * * @param cardType Kart tipi * @return SELECT yanıtı */ private byte[] createSelectResponse(CardType cardType) { // Basit bir SELECT yanıtı örneği // Gerçek uygulamada, kart tipine göre daha karmaşık bir yanıt oluşturulabilir byte[] aidBytes = cardType.getAid(); String cardName = cardType.getName(); // SELECT yanıtı oluştur byte[] nameBytes = cardName.getBytes(StandardCharsets.UTF_8); int totalLength = 2 + 2 + aidBytes.length + 2 + 2 + nameBytes.length + 2; byte[] response = new byte[totalLength]; int offset = 0; // FCI Template response[offset++] = (byte) 0x6F; response[offset++] = (byte) (totalLength - 2); // DF Name (AID) response[offset++] = (byte) 0x84; response[offset++] = (byte) aidBytes.length; System.arraycopy(aidBytes, 0, response, offset, aidBytes.length); offset += aidBytes.length; // FCI Proprietary Template response[offset++] = (byte) 0xA5; response[offset++] = (byte) (2 + nameBytes.length); // Application Label response[offset++] = (byte) 0x50; response[offset++] = (byte) nameBytes.length; System.arraycopy(nameBytes, 0, response, offset, nameBytes.length); offset += nameBytes.length; // Status Word response[offset++] = (byte) 0x90; response[offset++] = (byte) 0x00; return response; } /** * READ RECORD komutunu işleyen metod. * Bu metod, Track 1 verilerini döndürür. * * @return Track 1 verileri */ private byte[] processReadRecordCommand() { if (selectedCardType == null) { return SW_COMMAND_NOT_ALLOWED; } CardType cardType = cardTypes.get(selectedCardType); if (cardType != null) { // Track 1 verilerini döndür byte[] track1Data = cardType.getTrack1Data(); // Track 1 verilerini APDU yanıtı formatına dönüştür byte[] response = new byte[track1Data.length + 2]; System.arraycopy(track1Data, 0, response, 0, track1Data.length); response[track1Data.length] = (byte) 0x90; response[track1Data.length + 1] = (byte) 0x00; return response; } return SW_COMMAND_NOT_ALLOWED; } /** * GET PROCESSING OPTIONS komutunu işleyen metod. * * @return GPO komutuna uygun yanıt */ private byte[] processGetProcessingOptions() { if (selectedCardType == null) { return SW_COMMAND_NOT_ALLOWED; } // Basit bir GPO yanıtı örneği // Gerçek uygulamada, kart tipine göre daha karmaşık bir yanıt oluşturulabilir byte[] gpoResponse = { (byte) 0x80, (byte) 0x06, // Response Message Template Format 1 (byte) 0x00, (byte) 0x80, (byte) 0x08, (byte) 0x01, (byte) 0x01, (byte) 0x00, // AIP and AFL (byte) 0x90, (byte) 0x00 // SW_SUCCESS }; return gpoResponse; } /** * APDU komutunu bulut sunucusunda işleyen metod. * Bu metod, APDU komutunu bir HTTP isteği ile bulut sunucusuna gönderir * ve sunucudan dönen yanıtı NFC terminaline iletir. * * @param commandApdu Gelen APDU komutu * @return Bulut sunucusundan dönen APDU yanıtı */ private byte[] processApduInCloud(byte[] commandApdu) { try { Future future = executor.submit(() -> { try { // APDU komutunu JSON formatına dönüştür JSONObject jsonRequest = new JSONObject(); jsonRequest.put("apdu", bytesToHex(commandApdu)); // Kart bilgilerini ekle jsonRequest.put("cardNumber", PreferenceManager.getString(context, "card_number", "4111111111111111")); jsonRequest.put("cardHolderName", PreferenceManager.getString(context, "card_holder_name", "JOHN DOE")); jsonRequest.put("expiryDate", PreferenceManager.getString(context, "expiry_date", "2412")); jsonRequest.put("track1Data", PreferenceManager.getString(context, "track1_data", "")); // HTTP isteği oluştur RequestBody requestBody = RequestBody.create( MediaType.parse("application/json"), jsonRequest.toString()); Request request = new Request.Builder() .url(CLOUD_SERVER_URL) .post(requestBody) .build(); // İsteği gönder ve yanıtı al Response response = httpClient.newCall(request).execute(); if (!response.isSuccessful()) { Log.e(TAG, "Cloud server error: " + response.code()); return SW_UNKNOWN; } // Yanıtı JSON olarak parse et String responseBody = response.body().string(); JSONObject jsonResponse = new JSONObject(responseBody); String apduHex = jsonResponse.getString("apdu"); // Hex string'i byte dizisine dönüştür return hexToBytes(apduHex); } catch (IOException | JSONException e) { Log.e(TAG, "Error processing APDU in cloud", e); return SW_UNKNOWN; } }); // Yanıtı bekle (timeout eklenebilir) return future.get(); } catch (Exception e) { Log.e(TAG, "Error in cloud processing", e); return SW_UNKNOWN; } } /** * NFC oturumu sonlandığında çağrılan metod. * * @param reason Sonlanma nedeni */ @Override public void onDeactivated(int reason) { Log.d(TAG, "Deactivated: " + reason); selectedCardType = null; } /** * Byte dizisini hexadecimal string'e dönüştüren yardımcı metod. * * @param bytes Dönüştürülecek byte dizisi * @return Hexadecimal string */ private static String bytesToHex(byte[] bytes) { StringBuilder sb = new StringBuilder(); for (byte b : bytes) { sb.append(String.format("%02X", b)); } return sb.toString(); } /** * Hexadecimal string'i byte dizisine dönüştüren yardımcı metod. * * @param hex Dönüştürülecek hexadecimal string * @return Byte dizisi */ private static byte[] hexToBytes(String hex) { int len = hex.length(); byte[] data = new byte[len / 2]; for (int i = 0; i < len; i += 2) { data[i / 2] = (byte) ((Character.digit(hex.charAt(i), 16) << 4) + Character.digit(hex.charAt(i+1), 16)); } return data; } /** * Kart tipini temsil eden iç sınıf. * Her kart tipi için AID ve Track 1 verisi içerir. */ private static class CardType { private final String name; private final byte[] aid; private final byte[] track1Data; /** * Yapıcı metod * * @param name Kart tipi adı * @param aid Kart AID'si * @param track1Data Track 1 verisi */ public CardType(String name, byte[] aid, byte[] track1Data) { this.name = name; this.aid = aid; this.track1Data = track1Data; } public String getName() { return name; } public byte[] getAid() { return aid; } public byte[] getTrack1Data() { return track1Data; } } } [V0_FILE]java:file="WebAppActivity.java" isMerged="true" package com.example.nfcpayment; import android.app.Activity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.View; import android.webkit.JavascriptInterface; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Button; import android.widget.Toast; import org.json.JSONException; import org.json.JSONObject; public class WebAppActivity extends Activity { private WebView webView; private Button closeButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_web_app); // UI bileşenlerini başlat webView = findViewById(R.id.web_view); closeButton = findViewById(R.id.close_button); // WebView ayarları WebSettings webSettings = webView.getSettings(); webSettings.setJavaScriptEnabled(true); webSettings.setDomStorageEnabled(true); // JavaScript arayüzü ekle webView.addJavascriptInterface(new WebAppInterface(), "Android"); // WebViewClient ayarla webView.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { // Harici bağlantıları tarayıcıda aç if (!url.startsWith("file:///android_asset/")) { Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); startActivity(intent); return true; } return false; } }); // Web uygulamasını yükle webView.loadUrl("file:///android_asset/webapp/index.html"); // Kapat butonu için listener closeButton.setOnClickListener(v -> finish()); } /** * JavaScript arayüzü */ private class WebAppInterface { /** * Toast mesajı gösterir */ @JavascriptInterface public void showToast(String message) { Toast.makeText(WebAppActivity.this, message, Toast.LENGTH_SHORT).show(); } /** * Kart bilgilerini döndürür */ @JavascriptInterface public String getCardInfo() { try { JSONObject cardInfo = new JSONObject(); cardInfo.put("cardNumber", maskCardNumber(PreferenceManager.getString(WebAppActivity.this, "card_number", ""))); cardInfo.put("cardHolder", PreferenceManager.getString(WebAppActivity.this, "card_holder_name", "")); cardInfo.put("expiryDate", PreferenceManager.getString(WebAppActivity.this, "expiry_date", "")); cardInfo.put("cardType", getCardTypeFromNumber(PreferenceManager.getString(WebAppActivity.this, "card_number", ""))); return cardInfo.toString(); } catch (JSONException e) { return "{}"; } } /** * Track1 verisini döndürür */ @JavascriptInterface public String getTrack1Data() { return PreferenceManager.getString(WebAppActivity.this, "track1_data", ""); } /** * Kart numarasını maskeler */ private String maskCardNumber(String cardNumber) { if (cardNumber == null || cardNumber.length() < 13) { return cardNumber; } StringBuilder masked = new StringBuilder(); // İlk 6 haneyi göster masked.append(cardNumber.substring(0, 6)); // Ortadaki haneleri maskele for (int i = 6; i < cardNumber.length() - 4; i++) { masked.append("*"); } // Son 4 haneyi göster masked.append(cardNumber.substring(cardNumber.length() - 4)); return masked.toString(); } /** * Kart numarasından kart tipini belirler */ private String getCardTypeFromNumber(String cardNumber) { if (cardNumber.startsWith("4")) { return "Visa"; } else if (cardNumber.startsWith("5")) { return "MasterCard"; } else if (cardNumber.startsWith("3")) { return "American Express"; } else if (cardNumber.startsWith("6")) { return "Discover"; } else { return "Bilinmeyen Kart"; } } } } [V0_FILE]java:file="WebAppFragment.java" isMerged="true" package com.example.nfcpayment; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.webkit.JavascriptInterface; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.ProgressBar; import android.widget.Toast; import androidx.fragment.app.Fragment; import org.json.JSONException; import org.json.JSONObject; public class WebAppFragment extends Fragment { private WebView webView; private ProgressBar progressBar; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_web_app, container, false); // UI bileşenlerini başlat webView = view.findViewById(R.id.web_view); progressBar = view.findViewById(R.id.progress_bar); // WebView ayarları WebSettings webSettings = webView.getSettings(); webSettings.setJavaScriptEnabled(true); webSettings.setDomStorageEnabled(true); // JavaScript arayüzü ekle webView.addJavascriptInterface(new WebAppInterface(), "Android"); // WebViewClient ayarla webView.setWebViewClient(new WebViewClient() { @Override public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) { progressBar.setVisibility(View.VISIBLE); } @Override public void onPageFinished(WebView view, String url) { progressBar.setVisibility(View.GONE); } @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { // Harici bağlantıları tarayıcıda aç if (!url.startsWith("file:///android_asset/")) { Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); startActivity(intent); return true; } return false; } }); // Web uygulamasını yükle webView.loadUrl("file:///android_asset/webapp/index.html"); return view; } /** * JavaScript arayüzü */ private class WebAppInterface { /** * Toast mesajı gösterir */ @JavascriptInterface public void showToast(String message) { Toast.makeText(getActivity(), message, Toast.LENGTH_SHORT).show(); } /** * Kart bilgilerini döndürür */ @JavascriptInterface public String getCardInfo() { try { JSONObject cardInfo = new JSONObject(); cardInfo.put("cardNumber", maskCardNumber(PreferenceManager.getString(getActivity(), "card_number", ""))); cardInfo.put("cardHolder", PreferenceManager.getString(getActivity(), "card_holder_name", "")); cardInfo.put("expiryDate", PreferenceManager.getString(getActivity(), "expiry_date", "")); cardInfo.put("cardType", getCardTypeFromNumber(PreferenceManager.getString(getActivity(), "card_number", ""))); return cardInfo.toString(); } catch (JSONException e) { return "{}"; } } /** * Track1 verisini döndürür */ @JavascriptInterface public String getTrack1Data() { return PreferenceManager.getString(getActivity(), "track1_data", ""); } /** * Kart numarasını maskeler */ private String maskCardNumber(String cardNumber) { if (cardNumber == null || cardNumber.length() < 13) return cardNumber; // İlk 6 ve son 4 haneyi göster, ortadaki haneleri maskele final String firstSix = cardNumber.substring(0, 6); final String lastFour = cardNumber.substring(cardNumber.length() - 4); final String maskedPart = "*".repeat(cardNumber.length() - 10); return firstSix + maskedPart + lastFour; } /** * Kart numarasından kart tipini belirler */ private String getCardTypeFromNumber(String cardNumber) { if (cardNumber.startsWith("4")) { return "Visa"; } else if (cardNumber.startsWith("5")) { return "MasterCard"; } else if (cardNumber.startsWith("3")) { return "American Express"; } else if (cardNumber.startsWith("6")) { return "Discover"; } else { return "Bilinmeyen Kart"; } } } } [V0_FILE]xml:file="activity_main.xml" isMerged="true" Harcama Analizi Güvenlik Önerileri Kişisel Öneriler

{activeTab === "spending" ? "Harcama Analizi" : activeTab === "security" ? "Güvenlik Önerileri" : "Kişisel Öneriler"}

Yapay zeka destekli ödeme analizi ve öneriler {isLoading ? (

AI öngörüleri yükleniyor...

) : error ? (

{error}

) : (

{getActiveInsight()}

{/* Ödeme önerileri (sadece recommendations tab'inde göster) */} {activeTab === "recommendations" && insights?.paymentSuggestions && (

Ödeme Önerileri

{suggestion}
Ödeme önerileri yüklenemedi

)}

AI Öngörüleri

Ödeme Önerileri

NFC Payment Animations

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