First

2026-04-15 00:44:12 +09:00 · 2025-07-30 10:14:00 +09:00
commit 43f9ff6b82
54 changed files with 1970 additions and 0 deletions
--- a/app/.gitignore
+++ b/app/.gitignore
@@ -0,0 +1 @@
+/build
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -0,0 +1,44 @@
+plugins {
+    alias(libs.plugins.android.application)
+}
+
+android {
+    namespace = "com.example.idcard"
+    compileSdk = 36
+
+    defaultConfig {
+        applicationId = "com.example.idcard"
+        minSdk = 32
+        targetSdk = 36
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+}
+
+dependencies {
+    implementation(libs.appcompat)
+    implementation(libs.material)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.ext.junit)
+    androidTestImplementation(libs.espresso.core)
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.9.0")
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    implementation("androidx.fragment:fragment:1.6.1")
+}
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
--- a/app/src/androidTest/java/com/example/idcard/ExampleInstrumentedTest.java
+++ b/app/src/androidTest/java/com/example/idcard/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.example.idcard;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.idcard", appContext.getPackageName());
+    }
+}
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.idcard">
+
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.NFC" />
+    <uses-feature android:name="android.hardware.nfc.hce" android:required="true" />
+    <uses-feature android:name="android.hardware.nfc" android:required="true" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="SNU ID Card"
+        android:theme="@style/Theme.MaterialComponents.DayNight.NoActionBar">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".ApduService"
+            android:exported="true"
+            android:permission="android.permission.BIND_NFC_SERVICE">
+            <intent-filter>
+                <action android:name="android.nfc.cardemulation.action.HOST_APDU_SERVICE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.nfc.cardemulation.host_apdu_service"
+                android:resource="@xml/apduservice" />
+        </service>
+    </application>
+</manifest>
--- a/app/src/main/java/com/example/idcard/ApduService.java
+++ b/app/src/main/java/com/example/idcard/ApduService.java
@@ -0,0 +1,238 @@
+package com.example.idcard;
+
+import android.content.SharedPreferences;
+import android.nfc.cardemulation.HostApduService;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+import android.widget.Toast;
+import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+import java.util.UUID;
+
+public class ApduService extends HostApduService {
+    private static final String TAG = "SNU_APDU";
+    public static boolean isAppActive = false;
+    public static EmulatorFragment emulatorFragment = null;
+
+    private static final byte[] ERROR_6400 = {(byte)0x64, 0x00};
+    private static final byte[] ERROR_6300 = {(byte)0x63, 0x00};
+    private static final byte[] SUCCESS_9000 = {(byte)0x90, 0x00};
+    private String currentChallenge = "";
+    private SharedPreferences prefs;
+
+    private enum COMMAND {
+        SELECT,
+        GET_CHALLENGE,
+        CREATE_SESSION,
+        EXTERNAL_AUTH,
+        READ_RECORD,
+        UNKNOWN
+    }
+
+    @Override
+    public byte[] processCommandApdu(byte[] apdu, Bundle extras) {
+        if (!isAppActive) {
+            addLog("App not active, ignoring APDU");
+            Log.d(TAG, "App not active, ignoring APDU");
+            return ERROR_6400;
+        }
+
+        prefs = getSharedPreferences("user_info", MODE_PRIVATE);
+
+        String receivedHex = bytesToHex(apdu);
+        Log.d(TAG, "RX: " + receivedHex);
+        addLog("RX: " + receivedHex);
+
+        if (apdu == null || apdu.length < 2) {
+            return ERROR_6400;
+        }
+
+        byte cla = apdu[0];
+        byte ins = apdu[1];
+
+        COMMAND command = COMMAND.UNKNOWN;
+        if (cla == 0x00 && ins == (byte)0xA4) {
+            command = COMMAND.SELECT;
+        } else if (cla == 0x00 && ins == (byte)0x84) {
+            command = COMMAND.GET_CHALLENGE;
+        } else if (cla == (byte)0x90 && ins == (byte)0x8A) {
+            command = COMMAND.CREATE_SESSION;
+        } else if ((cla == 0x00 || cla == (byte)0x94) && ins == (byte)0x82) {
+            command = COMMAND.EXTERNAL_AUTH;
+        } else if (cla == 0x00 && ins == (byte)0xB2) {
+            command = COMMAND.READ_RECORD;
+        }
+
+        byte[] result;
+        switch (command) {
+            case SELECT:
+                String tagBF0C = buildTlv("BF0C", "01000000000000");
+                String tag50 = buildTlv("50", stringToHex("USIM ID             "));
+                String tag84 = buildTlv("84", "D410000005494401");
+                String tagA5 = buildTlv("A5", tag50 + tagBF0C);
+                String tag6F = buildTlv("6F", tag84 + tagA5);
+                result = hexToBytes(tag6F + "9000");
+                break;
+
+            case GET_CHALLENGE:
+                String challenge = prefs.getString("CHALLENGE", "");
+                if (challenge == "") {
+                    challenge = UUID.randomUUID().toString().replace("-", "");
+                } else if (challenge == "0") {
+                    challenge = "00000000000000000000000000000000";
+                } else if (challenge == "X") {
+                    challenge = "";
+                } else if (challenge.length() != 32) {
+                    challenge = padHexRight(challenge, 16, "00");
+                }
+                result = hexToBytes(challenge + "9000");
+                currentChallenge = challenge;
+                break;
+
+            case CREATE_SESSION:
+                result = SUCCESS_9000;
+                String hostChallenge = bytesToHex(Arrays.copyOfRange(apdu, 5, apdu.length - 4));
+                String MAC = bytesToHex(Arrays.copyOfRange(apdu, apdu.length - 4, apdu.length));
+                String log = String.format("SESSION: HOST %s CARD %s -> %s", hostChallenge, currentChallenge, MAC);
+                Log.d(TAG, log);
+                addLog(log);
+                break;
+
+            case EXTERNAL_AUTH:
+                result = SUCCESS_9000;
+                break;
+
+            case READ_RECORD:
+                String univCd = prefs.getString("UNIVCD", "0345");
+                String cardTypeCd = prefs.getString("CARDTYPECD", "1");
+                String userId = prefs.getString("USERID", "");
+                String cardIssueNo = prefs.getString("CARDISSUENO", "0");
+                String userName = prefs.getString("USERNAME", "");
+                String userMainId = prefs.getString("USERMAINID", "");
+
+                if (cardTypeCd.length() > 1) {
+                    cardTypeCd = cardTypeCd.substring(1);
+                }
+
+                int issueNoInt = 0;
+                try {
+                    issueNoInt = Integer.parseInt(cardIssueNo);
+                } catch (Exception e) {
+                    issueNoInt = 0;
+                }
+
+                String f01 = padHexRight(stringToHex(univCd), 10, "20");
+                String f03 = stringToHex(cardTypeCd);
+                String f04 = padHexRight(stringToHex(userId), 30, "20");
+                String f05 = String.format("%02X", issueNoInt);
+                String f06 = padHexRight(stringToHexEucKr(userName), 40, "20");
+                String f07 = padHexRight(stringToHex(userMainId), 26, "20");
+                String f08 = "00".repeat(24);
+                String f09 = "00".repeat(103);
+
+                String recordResult = "01C60205" + f01 +
+                        "0301" + f03 +
+                        "040F" + f04 +
+                        "0501" + f05 +
+                        "0614" + f06 +
+                        "070D" + f07 +
+                        "0818" + f08 +
+                        "0967" + f09 +
+                        "9000";
+
+                result = hexToBytes(recordResult);
+                showCardReadAlert();
+                break;
+
+            case UNKNOWN:
+            default:
+                result = ERROR_6400;
+                break;
+        }
+
+        String responseHex = bytesToHex(result);
+        Log.d(TAG, "TX: " + responseHex);
+        addLog("TX: " + responseHex);
+        return result;
+    }
+    
+    private void addLog(String message) {
+        if (emulatorFragment != null) {
+            emulatorFragment.addLogMessage(message);
+        }
+    }
+
+    private void showCardReadAlert() {
+        Handler mainHandler = new Handler(Looper.getMainLooper());
+        mainHandler.post(() -> {
+            Toast.makeText(this, "Card data was read!", Toast.LENGTH_LONG).show();
+        });
+    }
+
+    private String buildTlv(String tag, String value) {
+        int length = value.length() / 2;
+        if (length < 128) {
+            return tag + String.format("%02X", length) + value;
+        } else if (length < 256) {
+            return tag + "81" + String.format("%02X", length) + value;
+        } else if (length < 65536) {
+            return tag + String.format("82%02X%02X", length >> 8, length & 0xFF) + value;
+        }
+        return "";
+    }
+
+    private String stringToHex(String str) {
+        StringBuilder hex = new StringBuilder();
+        for (char c : str.toCharArray()) {
+            hex.append(String.format("%02X", (int) c));
+        }
+        return hex.toString();
+    }
+
+    private String stringToHexEucKr(String str) {
+        try {
+            byte[] bytes = str.getBytes("EUC-KR");
+            StringBuilder hex = new StringBuilder();
+            for (byte b : bytes) {
+                hex.append(String.format("%02X", b & 0xFF));
+            }
+            return hex.toString();
+        } catch (UnsupportedEncodingException e) {
+            return stringToHex(str);
+        }
+    }
+
+    private String padHexRight(String hexStr, int totalLen, String pad) {
+        int needed = totalLen - hexStr.length();
+        if (needed <= 0) {
+            return hexStr.substring(0, totalLen);
+        }
+        return hexStr + pad.repeat(needed / 2);
+    }
+
+    private 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;
+    }
+
+    private String bytesToHex(byte[] bytes) {
+        StringBuilder result = new StringBuilder();
+        for (byte b : bytes) {
+            result.append(String.format("%02X", b & 0xFF));
+        }
+        return result.toString();
+    }
+
+    @Override
+    public void onDeactivated(int reason) {
+        Log.d(TAG, "Deactivated: " + reason);
+        addLog("NFC Deactivated: " + reason);
+    }
+}
--- a/app/src/main/java/com/example/idcard/EmulatorFragment.java
+++ b/app/src/main/java/com/example/idcard/EmulatorFragment.java
@@ -0,0 +1,175 @@
+package com.example.idcard;
+
+import android.Manifest;
+import android.app.Activity;
+import android.app.Dialog;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Environment;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ScrollView;
+import android.widget.TextView;
+import android.widget.Toast;
+import androidx.fragment.app.Fragment;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+import static android.content.Context.MODE_PRIVATE;
+
+public class EmulatorFragment extends Fragment {
+    private TextView tvLog;
+    private ScrollView scrollView;
+    private final StringBuilder logBuffer = new StringBuilder();
+    private SharedPreferences prefs;
+    private static final int STORAGE_PERMISSION_CODE = 1001;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        prefs = requireActivity().getSharedPreferences("user_info", MODE_PRIVATE);
+
+        View view = inflater.inflate(R.layout.fragment_emulator, container, false);
+
+        tvLog = view.findViewById(R.id.tv_log);
+        scrollView = view.findViewById(R.id.scroll_view);
+        Button btnClearLog = view.findViewById(R.id.btn_clear_log);
+        Button btnSettings = view.findViewById(R.id.btn_settings);
+        btnSettings.setOnClickListener(v -> showSettingsDialog());
+        btnClearLog.setOnClickListener(v -> clearLog());
+        checkStoragePermission();
+        addLogMessage("Emulator Started");
+        return view;
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        ApduService.isAppActive = true;
+        ApduService.emulatorFragment = this;
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        ApduService.isAppActive = false;
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        ApduService.isAppActive = false;
+        ApduService.emulatorFragment = null;
+    }
+
+    public void addLogMessage(String message) {
+        String timestamp = new SimpleDateFormat("HH:mm:ss", Locale.getDefault()).format(new Date());
+        String logEntry = timestamp + " - " + message + "\n";
+        writeLogToFile(logEntry);
+        Activity activity = getActivity();
+        if (activity != null) {
+            activity.runOnUiThread(() -> {
+                logBuffer.append(logEntry);
+                tvLog.setText(logBuffer.toString());
+                scrollView.post(() -> scrollView.fullScroll(ScrollView.FOCUS_DOWN));
+            });
+        }
+    }
+
+    private void writeLogToFile(String text) {
+        File downloadDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
+        File logFile = new File(downloadDir, "NFC_LOG.txt");
+
+        try (FileWriter writer = new FileWriter(logFile, true); // true = append
+             BufferedWriter bufferedWriter = new BufferedWriter(writer)) {
+            bufferedWriter.write(text);
+        } catch (IOException e) {
+            Log.e("FileLogger", "Error writing to log file", e);
+        }
+    }
+
+    private void checkStoragePermission() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            if (requireActivity().checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                    != PackageManager.PERMISSION_GRANTED) {
+                requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
+                        STORAGE_PERMISSION_CODE);
+            }
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (requestCode == STORAGE_PERMISSION_CODE) {
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+            } else {
+                Toast.makeText(getActivity(), "permission denied", Toast.LENGTH_SHORT).show();
+            }
+        }
+    }
+
+    private void clearLog() {
+        logBuffer.setLength(0);
+        tvLog.setText("");
+    }
+
+    private void showSettingsDialog() {
+        Dialog dialog = new Dialog(getActivity());
+        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
+        dialog.setContentView(R.layout.dialog_settings);
+        dialog.setCancelable(true);
+
+        EditText etUnivCd = dialog.findViewById(R.id.et_univ_cd);
+        EditText etCardTypeCd = dialog.findViewById(R.id.et_card_type_cd);
+        EditText etUserId = dialog.findViewById(R.id.et_user_id);
+        EditText etCardIssueNo = dialog.findViewById(R.id.et_card_issue_no);
+        EditText etUserName = dialog.findViewById(R.id.et_user_name);
+        EditText etUserMainId = dialog.findViewById(R.id.et_user_main_id);
+        EditText etChallenge = dialog.findViewById(R.id.et_challenge);
+        Button btnSave = dialog.findViewById(R.id.btn_save);
+        Button btnCancel = dialog.findViewById(R.id.btn_cancel);
+
+        etUnivCd.setText(prefs.getString("UNIVCD", "0345"));
+        etCardTypeCd.setText(prefs.getString("CARDTYPECD", "1"));
+        etUserId.setText(prefs.getString("USERID", ""));
+        etCardIssueNo.setText(prefs.getString("CARDISSUENO", "1"));
+        etUserName.setText(prefs.getString("USERNAME", ""));
+        etUserMainId.setText(prefs.getString("USERMAINID", ""));
+        etChallenge.setText(prefs.getString("CHALLENGE", ""));
+
+        btnSave.setOnClickListener(v -> {
+            SharedPreferences.Editor editor = prefs.edit();
+            editor.putString("UNIVCD", etUnivCd.getText().toString());
+            editor.putString("CARDTYPECD", etCardTypeCd.getText().toString());
+            editor.putString("USERID", etUserId.getText().toString());
+            editor.putString("CARDISSUENO", etCardIssueNo.getText().toString());
+            editor.putString("USERNAME", etUserName.getText().toString());
+            editor.putString("USERMAINID", etUserMainId.getText().toString());
+            editor.putString("CHALLENGE", etChallenge.getText().toString());
+            editor.apply();
+            Toast.makeText(getActivity(), "Settings saved", Toast.LENGTH_SHORT).show();
+            dialog.dismiss();
+        });
+        btnCancel.setOnClickListener(v -> dialog.dismiss());
+
+        dialog.show();
+        if (dialog.getWindow() != null) {
+            dialog.getWindow().setLayout(
+                    (int) (getResources().getDisplayMetrics().widthPixels * 0.9),
+                    android.view.ViewGroup.LayoutParams.WRAP_CONTENT
+            );
+        }
+    }
+}
--- a/app/src/main/java/com/example/idcard/MainActivity.java
+++ b/app/src/main/java/com/example/idcard/MainActivity.java
@@ -0,0 +1,58 @@
+package com.example.idcard;
+
+import android.os.Bundle;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentTransaction;
+import com.google.android.material.tabs.TabLayout;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        TabLayout tabLayout = findViewById(R.id.menu_tab);
+
+        if (savedInstanceState == null) {
+            loadFragment(new EmulatorFragment());
+        }
+
+        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                Fragment selectedFragment = null;
+                switch (tab.getPosition()) {
+                    case 0:
+                        selectedFragment = new EmulatorFragment();
+                        break;
+                    case 1:
+                        selectedFragment = new ReaderFragment();
+                        break;
+                }
+                loadFragment(selectedFragment);
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+            }
+
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+            }
+        });
+    }
+
+    private boolean loadFragment(Fragment fragment) {
+        if (fragment != null) {
+            FragmentManager fragmentManager = getSupportFragmentManager();
+            FragmentTransaction transaction = fragmentManager.beginTransaction();
+            transaction.replace(R.id.fragment_container, fragment);
+            transaction.commit();
+            return true;
+        }
+        return false;
+    }
+}
--- a/app/src/main/java/com/example/idcard/ReaderFragment.java
+++ b/app/src/main/java/com/example/idcard/ReaderFragment.java
@@ -0,0 +1,311 @@
+package com.example.idcard;
+
+import android.nfc.NfcAdapter;
+import android.nfc.Tag;
+import android.nfc.tech.IsoDep;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import android.widget.Toast;
+import androidx.fragment.app.Fragment;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+
+public class ReaderFragment extends Fragment implements NfcAdapter.ReaderCallback {
+    private static final String TAG = "NFCReader";
+    private NfcAdapter nfcAdapter;
+    private TextView resultText;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_reader, container, false);
+
+        resultText = view.findViewById(R.id.resultText);
+        nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity());
+
+        if (nfcAdapter == null) {
+            Toast.makeText(getActivity(), "NFC not supported", Toast.LENGTH_SHORT).show();
+            return view;
+        }
+
+        if (!nfcAdapter.isEnabled()) {
+            Toast.makeText(getActivity(), "Please enable NFC in settings", Toast.LENGTH_LONG).show();
+        }
+
+        updateResult("Reader ready...");
+        return view;
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (nfcAdapter != null && nfcAdapter.isEnabled()) {
+            Bundle options = new Bundle();
+            options.putInt(NfcAdapter.EXTRA_READER_PRESENCE_CHECK_DELAY, 250);
+
+            nfcAdapter.enableReaderMode(getActivity(), this,
+                    NfcAdapter.FLAG_READER_NFC_A |
+                            NfcAdapter.FLAG_READER_NFC_B |
+                            NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK,
+                    options);
+
+            updateResult("Scanning...");
+        }
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        if (nfcAdapter != null) {
+            nfcAdapter.disableReaderMode(getActivity());
+        }
+    }
+
+    @Override
+    public void onTagDiscovered(Tag tag) {
+        if (getActivity() != null) {
+            getActivity().runOnUiThread(() -> updateResult("Card detected! Reading..."));
+            readNFCCard(tag);
+        }
+    }
+
+    public byte[] ApduRequest(IsoDep isoDep, StringBuilder result, String command) throws IOException {
+        byte[] cmd = hexToBytes(command);
+        byte[] resp = isoDep.transceive(cmd);
+        result.append("Cmd: ").append(bytesToHex(cmd)).append("\n");
+        result.append("Resp: ").append(bytesToHex(resp)).append("\n");
+        result.append("Status: ").append(getStatusWord(resp)).append("\n");
+        result.append("\n");
+        return resp;
+    }
+
+    private void readNFCCard(Tag tag) {
+        IsoDep isoDep = IsoDep.get(tag);
+        if (isoDep == null) {
+            getActivity().runOnUiThread(() -> updateResult("Card not compatible"));
+            return;
+        }
+
+        try {
+            isoDep.connect();
+            isoDep.setTimeout(5000); // Increased timeout
+
+            StringBuilder result = new StringBuilder("=== RESULT ===\n\n");
+    
+            // 1. SELECT Application
+            result.append("1. SELECT Student App:\n\n");
+            byte[] selectResp =
+                    ApduRequest(isoDep, result, "00 A4 04 00 08 D4 10 00 00 05 49 44 01");
+
+            if (isSuccess(selectResp)) {
+                parseSelectResponse(selectResp, result);
+                result.append("-- Application found\n\n");
+
+                // 2. GET CHALLENGE
+                result.append("2. GET CHALLENGE:\n\n");
+                byte[] challengeResp =
+                        ApduRequest(isoDep, result, "00 84 00 00 10");
+                if (isSuccess(challengeResp)) {
+                    result.append("-- Challenge: ").append(extractChallenge(challengeResp)).append("\n\n");
+                }
+                result.append("\n");
+                // GET CHALLENGE END
+
+                // cardChallenge
+
+                // 3. CREATE SESSION
+                result.append("3. CREATE SESSION:\n\n");
+                byte[] sessionResp =
+                        ApduRequest(isoDep, result, "80 8A 00 81 14" + "01 02 03 04 01 02 03 04 01 02 03 04" + "01 02 03 04");
+                if (isSuccess(sessionResp)) {
+                    result.append("-- Session created\n");
+                } else {
+                    result.append("-- Session Error\n");
+                    return;
+                }
+                result.append("\n");
+                // CREATE SESSION END
+
+                // 4-1. GET CHALLENGE
+                result.append("2. GET CHALLENGE:\n\n");
+                ApduRequest(isoDep, result, "0084000010");
+                // GET CHALLENGE END
+
+//                // 4. EXTERNAL AUTH
+//                result.append("4. EXTERNAL AUTH:\n\n");
+//                byte[] authResp =
+//                        ApduRequest(isoDep, result, "00 82 00 82 04" + "01 01 01 01");
+//                if (isSuccess(authResp)) {
+//                    result.append("-- Authentication successful\n");
+//                } else {
+//                    result.append("-- Authentication failed\n");
+//                    return
+//                }
+//                result.append("\n");
+//                // EXTERNAL AUTH END
+//
+//                // 5. READ RECORD END
+//                result.append("5. READ RECORD:\n\n");
+//                boolean recordSuccess = false;
+//                String[] readCommands = {
+//                        "00B2010CC8",
+//                };
+//                for (String cmdHex : readCommands) {
+//                    byte[] readResp =
+//                            ApduRequest(isoDep, result, cmdHex);
+//                    if (isSuccess(readResp)) {
+//                        result.append("-- Data: ").append(bytesToHex(readResp)).append("\n");
+//                        recordSuccess = true;
+//                        break;
+//                    }
+//                    else if (readResp.length >= 2 &&
+//                            readResp[readResp.length-2] == (byte)0x61) {
+//
+//                        // 61XX = More data available
+//                        byte sw2 = readResp[readResp.length-1];
+//                        result.append(" (More data available: ").append(String.format("%02X", sw2 & 0xFF)).append(")\n");
+//
+//                        // Send GET RESPONSE
+//                        byte[] getResponseCmd = hexToBytes("00C00000" + String.format("%02X", sw2 & 0xFF));
+//                        byte[] moreData = isoDep.transceive(getResponseCmd);
+//                        result.append("GET RESPONSE: ").append(bytesToHex(moreData)).append("\n");
+//
+//                        if (isSuccess(moreData)) {
+//                            recordSuccess = true;
+//                            break;
+//                        }
+//                    }
+//                    else {
+//                        result.append("\n");
+//                    }
+//                }
+//                if (!recordSuccess) {
+//                    result.append("-- File not found\n");
+//                }
+//                result.append("\n");
+//                // READ RECORD END
+
+            } else {
+                result.append("-- Application not found\n\n");
+            }
+
+            isoDep.close();
+
+            final String finalResult = result.toString();
+            getActivity().runOnUiThread(() -> updateResult(finalResult));
+
+        } catch (IOException e) {
+            Log.e(TAG, "Error reading card", e);
+            getActivity().runOnUiThread(() -> updateResult("Error: " + e.getMessage()));
+        }
+    }
+
+    private void parseSelectResponse(byte[] response, StringBuilder result) {
+        String hex = bytesToHex(response);
+        if (hex.length() >= 4) {
+            hex = hex.substring(0, hex.length() - 4);
+        }
+        if (hex.contains("6F")) {
+            result.append("-- 6F (File Control Information)\n");
+        }
+        if (hex.contains("84")) {
+            result.append("-- 84 (Application Identifier)\n");
+        }
+        if (hex.contains("50")) {
+            result.append("-- 50 (Application Label)\n");
+            int pos = hex.indexOf("50");
+            if (pos >= 0 && pos + 4 < hex.length()) {
+                try {
+                    int len = Integer.parseInt(hex.substring(pos + 2, pos + 4), 16);
+                    if (pos + 4 + len * 2 <= hex.length()) {
+                        String labelHex = hex.substring(pos + 4, pos + 4 + len * 2);
+                        String label = hexToString(labelHex);
+                        result.append("  -- Label: '").append(label.trim()).append("'\n");
+                    }
+                } catch (Exception e) {
+                    Log.e(TAG, "Error parsing label", e);
+                }
+            }
+        }
+        result.append("\n");
+    }
+
+    private String extractChallenge(byte[] response) {
+        if (response.length >= 4) {
+            byte[] challenge = new byte[response.length - 2];
+            System.arraycopy(response, 0, challenge, 0, response.length - 2);
+            return bytesToHex(challenge);
+        }
+        return "No data";
+    }
+
+    private boolean isSuccess(byte[] response) {
+        return response.length >= 2 &&
+                response[response.length - 2] == (byte) 0x90 &&
+                response[response.length - 1] == (byte) 0x00;
+    }
+
+    private String getStatusWord(byte[] response) {
+        if (response.length >= 2) {
+            byte sw1 = response[response.length - 2];
+            byte sw2 = response[response.length - 1];
+            String status = String.format("%02X%02X", sw1 & 0xFF, sw2 & 0xFF);
+
+            if (sw1 == (byte) 0x90 && sw2 == (byte) 0x00) return status + " (Success)";
+            if (sw1 == (byte) 0x6A && sw2 == (byte) 0x82) return status + " (File not found)";
+            if (sw1 == (byte) 0x6A && sw2 == (byte) 0x86) return status + " (Wrong parameters)";
+            if (sw1 == (byte) 0x69 && sw2 == (byte) 0x82) return status + " (Security condition not satisfied)";
+            if (sw1 == (byte) 0x6A && sw2 == (byte) 0x81) return status + " (Function not supported)";
+            if (sw1 == (byte) 0x67 && sw2 == (byte) 0x00) return status + " (Wrong length)";
+            if (sw1 == (byte) 0x6D && sw2 == (byte) 0x00) return status + " (Instruction not supported)";
+            if (sw1 == (byte) 0x6E && sw2 == (byte) 0x00) return status + " (Class not supported)";
+
+            return status + " (Error)";
+        }
+        return "Unknown";
+    }
+
+    private void updateResult(final String text) {
+        Log.i("com.example.nfcreader", text);
+        getActivity().runOnUiThread(() -> resultText.setText(text));
+    }
+
+    private byte[] hexToBytes(String s) {
+        String hex = s.replace(" ", "");
+        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;
+    }
+
+    private String bytesToHex(byte[] bytes) {
+        StringBuilder sb = new StringBuilder();
+        for (byte b : bytes) {
+            sb.append(String.format("%02X", b));
+        }
+        return sb.toString();
+    }
+
+    private String hexToString(String hex) {
+        try {
+            return new String(hexToBytes(hex), "ASCII");
+        } catch (UnsupportedEncodingException e) {
+            return hex;
+        }
+    }
+
+    private String hexToEucKrString(String hex) {
+        try {
+            return new String(hexToBytes(hex), "EUC-KR");
+        } catch (UnsupportedEncodingException e) {
+            return hexToString(hex);
+        }
+    }
+}
--- a/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
--- a/app/src/main/res/drawable/ic_launcher_foreground.xml
+++ b/app/src/main/res/drawable/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:fitsSystemWindows="true">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/topAppBar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:title="Emulator"
+            style="@style/Widget.MaterialComponents.Toolbar.Primary" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <com.google.android.material.tabs.TabLayout
+        android:id="@+id/menu_tab"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <com.google.android.material.tabs.TabItem
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Emulator"
+            />
+
+        <com.google.android.material.tabs.TabItem
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Reader"
+            />
+
+    </com.google.android.material.tabs.TabLayout>
+
+    <FrameLayout
+        android:id="@+id/fragment_container"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1" />
+
+</LinearLayout>
--- a/app/src/main/res/layout/dialog_settings.xml
+++ b/app/src/main/res/layout/dialog_settings.xml
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="CAMPUS_CD"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_univ_cd"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="16dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="CARDD_TYPE_CD"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_card_type_cd"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="16dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="USER_ID"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_user_id"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="16dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="CARD_ISSUE_NO"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_card_issue_no"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="16dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="USER_NAME_KOR"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_user_name"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="16dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="USER_MAIN_ID"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_user_main_id"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="24dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="CARD_CHALLENGE"
+            android:textSize="14sp"
+            android:layout_marginBottom="4dp" />
+
+        <EditText
+            android:id="@+id/et_challenge"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_marginBottom="24dp" />
+
+        <Button
+            android:id="@+id/btn_save"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:text="Save"
+            android:textSize="16sp" />
+
+        <Button
+            android:id="@+id/btn_cancel"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:text="Cancel"
+
+            android:textSize="16sp" />
+
+    </LinearLayout>
+
+</ScrollView>
--- a/app/src/main/res/layout/fragment_emulator.xml
+++ b/app/src/main/res/layout/fragment_emulator.xml
@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="16dp"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+    <ScrollView
+        android:id="@+id/scroll_view"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:background="@android:color/black"
+        android:padding="8dp">
+
+        <TextView
+            android:id="@+id/tv_log"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textColor="@android:color/white"
+            android:fontFamily="monospace"
+            android:textSize="12sp"
+            android:text="" />
+
+    </ScrollView>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:layout_marginTop="8dp">
+
+        <Button
+            android:id="@+id/btn_clear_log"
+            android:layout_width="wrap_content"
+            android:layout_height="36dp"
+            android:text="Clear"
+            android:textSize="12sp"
+            android:layout_marginRight="12dp"/>
+
+        <Button
+            android:id="@+id/btn_settings"
+            android:layout_width="wrap_content"
+            android:layout_height="36dp"
+            android:text="Setting"
+            android:textSize="12sp"/>
+
+    </LinearLayout>
+</LinearLayout>
--- a/app/src/main/res/layout/fragment_reader.xml
+++ b/app/src/main/res/layout/fragment_reader.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="16dp"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:background="@android:color/black"
+        android:padding="8dp">
+
+        <TextView
+            android:id="@+id/resultText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textColor="@android:color/white"
+            android:fontFamily="monospace"
+            android:textSize="12sp"
+            android:text="" />
+
+    </ScrollView>
+
+</LinearLayout>
--- a/app/src/main/res/mipmap-anydpi/ic_launcher.xml
+++ b/app/src/main/res/mipmap-anydpi/ic_launcher.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
--- a/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml
+++ b/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
--- a/app/src/main/res/mipmap-hdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-hdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-mdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-mdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
--- a/app/src/main/res/values-night/themes.xml
+++ b/app/src/main/res/values-night/themes.xml
@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.IdCard" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">IdCard</string>
+</resources>
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.IdCard" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
--- a/app/src/main/res/xml/apduservice.xml
+++ b/app/src/main/res/xml/apduservice.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<host-apdu-service xmlns:android="http://schemas.android.com/apk/res/android"
+    android:requireDeviceUnlock="false">
+    <aid-group android:category="other">
+        <aid-filter android:name="D410000005494401" />
+    </aid-group>
+</host-apdu-service>
--- a/app/src/main/res/xml/backup_rules.xml
+++ b/app/src/main/res/xml/backup_rules.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older than API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>
--- a/app/src/main/res/xml/data_extraction_rules.xml
+++ b/app/src/main/res/xml/data_extraction_rules.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>
--- a/app/src/main/res/xml/nfc_tech_filter.xml
+++ b/app/src/main/res/xml/nfc_tech_filter.xml
@@ -0,0 +1,5 @@
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <tech-list>
+        <tech>android.nfc.tech.IsoDep</tech>
+    </tech-list>
+</resources>
--- a/app/src/test/java/com/example/idcard/ExampleUnitTest.java
+++ b/app/src/test/java/com/example/idcard/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package com.example.idcard;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}