Initial version -- added millennium read funcionality

2026-03-09 22:05:28 +01:00
commit 77c2ded482
2770 changed files with 141927 additions and 0 deletions
@@ -0,0 +1 @@
+/build
@@ -0,0 +1,58 @@
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.compose)
+}
+
+android {
+    namespace = "com.pjpmosteiro.itartanas"
+    compileSdk {
+        version = release(36) {
+            minorApiLevel = 1
+        }
+    }
+
+    defaultConfig {
+        applicationId = "com.pjpmosteiro.itartanas"
+        minSdk = 24
+        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
+    }
+    buildFeatures {
+        compose = true
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.ui.graphics)
+    implementation(libs.androidx.compose.ui.tooling.preview)
+    implementation(libs.androidx.compose.material3)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+    debugImplementation(libs.androidx.compose.ui.tooling)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
+}
@@ -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
@@ -0,0 +1,24 @@
+package com.pjpmosteiro.itartanas
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.pjpmosteiro.itartanas", appContext.packageName)
+    }
+}
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.NFC" />
+    <uses-feature
+        android:name="android.hardware.nfc"
+        android:required="true" />
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.ITartanas">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:launchMode="singleTop"
+            android:theme="@style/Theme.ITartanas">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <intent-filter>
+                <action android:name="android.nfc.action.TECH_DISCOVERED" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.nfc.action.TECH_DISCOVERED"
+                android:resource="@xml/nfc_tech_filter" />
+        </activity>
+    </application>
+
+</manifest>
@@ -0,0 +1,282 @@
+package com.pjpmosteiro.itartanas
+
+import android.app.PendingIntent
+import android.content.Intent
+import android.nfc.NfcAdapter
+import android.nfc.Tag
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.lifecycleScope
+import com.pjpmosteiro.itartanas.nfc.CardData
+import com.pjpmosteiro.itartanas.nfc.CardRepositoryImpl
+import com.pjpmosteiro.itartanas.ui.theme.ITartanasTheme
+import kotlinx.coroutines.launch
+import java.util.Locale
+
+class MainActivity : ComponentActivity() {
+    private var nfcAdapter: NfcAdapter? = null
+    private var pendingIntent: PendingIntent? = null
+    private val cardRepository = CardRepositoryImpl()
+    
+    private var cardData by mutableStateOf<CardData?>(null)
+    private var isReading by mutableStateOf(false)
+    private var errorMessage by mutableStateOf<String?>(null)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        
+        // Inicializar NFC
+        nfcAdapter = NfcAdapter.getDefaultAdapter(this)
+        
+        if (nfcAdapter == null) {
+            Toast.makeText(this, "Este dispositivo no tiene NFC", Toast.LENGTH_LONG).show()
+        } else if (nfcAdapter?.isEnabled == false) {
+            Toast.makeText(this, "Por favor, activa el NFC en configuración", Toast.LENGTH_LONG).show()
+        }
+        
+        val intent = Intent(this, javaClass).apply {
+            addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
+        }
+        pendingIntent = PendingIntent.getActivity(
+            this, 0, intent,
+            PendingIntent.FLAG_MUTABLE
+        )
+        
+        enableEdgeToEdge()
+        setContent {
+            ITartanasTheme {
+                CardReaderScreen(
+                    cardData = cardData,
+                    isReading = isReading,
+                    errorMessage = errorMessage
+                )
+            }
+        }
+        
+        // Procesar intent si viene de NFC
+        handleIntent(intent)
+    }
+    
+    override fun onResume() {
+        super.onResume()
+        nfcAdapter?.enableForegroundDispatch(this, pendingIntent, null, null)
+    }
+    
+    override fun onPause() {
+        super.onPause()
+        nfcAdapter?.disableForegroundDispatch(this)
+    }
+    
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        handleIntent(intent)
+    }
+    
+    private fun handleIntent(intent: Intent) {
+        if (NfcAdapter.ACTION_TECH_DISCOVERED == intent.action ||
+            NfcAdapter.ACTION_TAG_DISCOVERED == intent.action) {
+            
+            val tag: Tag? = if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.TIRAMISU) {
+                intent.getParcelableExtra(NfcAdapter.EXTRA_TAG, Tag::class.java)
+            } else {
+                @Suppress("DEPRECATION")
+                intent.getParcelableExtra(NfcAdapter.EXTRA_TAG)
+            }
+            if (tag != null) {
+                readCard(tag)
+            }
+        }
+    }
+    
+    private fun readCard(tag: Tag) {
+        isReading = true
+        errorMessage = null
+        
+        lifecycleScope.launch {
+            try {
+                val result = cardRepository.getCard(tag)
+                result.onSuccess { data ->
+                    cardData = data
+                    errorMessage = null
+                }.onFailure { error ->
+                    errorMessage = "Error al leer la tarjeta: ${error.message}"
+                    Toast.makeText(
+                        this@MainActivity,
+                        errorMessage,
+                        Toast.LENGTH_LONG
+                    ).show()
+                }
+            } catch (e: Exception) {
+                errorMessage = "Error inesperado: ${e.message}"
+                Toast.makeText(
+                    this@MainActivity,
+                    errorMessage,
+                    Toast.LENGTH_LONG
+                ).show()
+            } finally {
+                isReading = false
+            }
+        }
+    }
+}
+
+@Composable
+fun CardReaderScreen(
+    cardData: CardData?,
+    isReading: Boolean,
+    errorMessage: String?
+) {
+    Scaffold(
+        modifier = Modifier.fillMaxSize()
+    ) { innerPadding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(innerPadding)
+                .padding(24.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center
+        ) {
+            Text(
+                text = "Lector de Tarjeta Millennium",
+                fontSize = 24.sp,
+                fontWeight = FontWeight.Bold,
+                textAlign = TextAlign.Center,
+                modifier = Modifier.padding(bottom = 32.dp)
+            )
+            
+            when {
+                isReading -> {
+                    CircularProgressIndicator(
+                        modifier = Modifier
+                            .size(64.dp)
+                            .padding(bottom = 16.dp)
+                    )
+                    Text("Leyendo tarjeta...")
+                }
+                
+                cardData != null -> {
+                    Card(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(vertical = 16.dp),
+                        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp)
+                    ) {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .padding(24.dp)
+                        ) {
+                            Text(
+                                text = "Número de Tarjeta",
+                                fontSize = 14.sp,
+                                color = MaterialTheme.colorScheme.secondary
+                            )
+                            Text(
+                                text = cardData.id,
+                                fontSize = 20.sp,
+                                fontWeight = FontWeight.Bold,
+                                modifier = Modifier.padding(top = 4.dp, bottom = 16.dp)
+                            )
+                            
+                            HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
+                            
+                            Text(
+                                text = "Saldo",
+                                fontSize = 14.sp,
+                                color = MaterialTheme.colorScheme.secondary
+                            )
+                            Text(
+                                text = if (cardData.balance != null) {
+                                    String.format(Locale.getDefault(), "%.2f €", cardData.balance)
+                                } else {
+                                    "No disponible"
+                                },
+                                fontSize = 28.sp,
+                                fontWeight = FontWeight.Bold,
+                                color = MaterialTheme.colorScheme.primary,
+                                modifier = Modifier.padding(top = 4.dp)
+                            )
+                        }
+                    }
+                    
+                    Text(
+                        text = "✓ Tarjeta leída correctamente",
+                        color = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.padding(top = 16.dp)
+                    )
+                }
+                
+                errorMessage != null -> {
+                    Card(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(vertical = 16.dp),
+                        colors = CardDefaults.cardColors(
+                            containerColor = MaterialTheme.colorScheme.errorContainer
+                        )
+                    ) {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .padding(24.dp)
+                        ) {
+                            Text(
+                                text = "Error",
+                                fontSize = 16.sp,
+                                fontWeight = FontWeight.Bold,
+                                color = MaterialTheme.colorScheme.error
+                            )
+                            Text(
+                                text = errorMessage,
+                                fontSize = 14.sp,
+                                color = MaterialTheme.colorScheme.onErrorContainer,
+                                modifier = Modifier.padding(top = 8.dp)
+                            )
+                        }
+                    }
+                }
+                
+                else -> {
+                    Icon(
+                        painter = androidx.compose.ui.res.painterResource(
+                            android.R.drawable.ic_dialog_info
+                        ),
+                        contentDescription = "NFC Icon",
+                        modifier = Modifier
+                            .size(120.dp)
+                            .padding(bottom = 24.dp),
+                        tint = MaterialTheme.colorScheme.primary
+                    )
+                    
+                    Text(
+                        text = "Acerca tu Tarjeta Millennium al lector NFC",
+                        fontSize = 16.sp,
+                        textAlign = TextAlign.Center,
+                        modifier = Modifier.padding(bottom = 8.dp)
+                    )
+                    
+                    Text(
+                        text = "La app leerá automáticamente el número de tarjeta y el saldo",
+                        fontSize = 14.sp,
+                        textAlign = TextAlign.Center,
+                        color = MaterialTheme.colorScheme.secondary
+                    )
+                }
+            }
+        }
+    }
+}
+
@@ -0,0 +1,165 @@
+package com.pjpmosteiro.itartanas.nfc
+
+import android.nfc.Tag
+import android.nfc.tech.IsoDep
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+data class CardData(
+    val id: String,
+    val balance: Double? = null,
+    val lastOperation: String? = null
+)
+
+class CardRepositoryImpl(
+    private val dispatcher: CoroutineDispatcher = Dispatchers.IO
+) {
+    
+    suspend fun getCard(tag: Tag): Result<CardData> = withContext(dispatcher) {
+        try {
+            val isoDep = IsoDep.get(tag)
+            isoDep.connect()
+            
+            // Seleccionar red de transporte
+            val transportNetworkResponse = selectTransportNetwork(isoDep)
+            
+            // Leer entorno
+            readEnvironment(isoDep)
+            
+            // Leer contrato
+            val contract = readContract(isoDep)
+            
+            // Obtener ID de tarjeta
+            val cardId = getCardId(transportNetworkResponse)
+            
+            // Obtener saldo (bytes 29-31, 3 bytes, big endian, en céntimos)
+            val balance = toIntBigEndian(contract, 29, 3) / 100.0
+            
+            isoDep.close()
+            
+            Result.success(CardData(cardId, balance))
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+    
+    private fun getCardId(transportNetworkResponse: ByteArray): String {
+        val bArrSliceArray = transportNetworkResponse.sliceArray(2 until transportNetworkResponse.size - 2)
+        var strBcdToDecString = bcdToDecString(bArrSliceArray)
+        
+        val strSubstring = strBcdToDecString.substring(6, 8)
+        val str = when {
+            strSubstring == "04" || !strBcdToDecString.startsWith("987020") -> {
+                if (strSubstring != "04") "00" else null
+            }
+            else -> "01"
+        }
+        
+        if (str != null) {
+            val strPanToIep = panToIep(bArrSliceArray, str)
+            if (strPanToIep != null) {
+                strBcdToDecString = strPanToIep
+            }
+        }
+        
+        return groupEvery(maskFirstNChars(strBcdToDecString, 8), 4)
+    }
+    
+    private fun selectTransportNetwork(isoDep: IsoDep): ByteArray {
+        return sendApdu(isoDep, byteArrayOf(0x80.toByte(), 0x26, 0x4F, 0x11, 0x0A), 12)
+    }
+    
+    private fun readEnvironment(isoDep: IsoDep): ByteArray {
+        return sendApdu(isoDep, byteArrayOf(0x80.toByte(), 0x32, 0x00, 0x00, 0x18), 26)
+    }
+    
+    private fun readContract(isoDep: IsoDep): ByteArray {
+        return sendApdu(isoDep, byteArrayOf(0x80.toByte(), 0x2E, 0x01, 0x00, 0x20), 34)
+    }
+    
+    private fun sendApdu(isoDep: IsoDep, command: ByteArray, responseSize: Int, statusWord: String = "9000"): ByteArray {
+        val response = isoDep.transceive(command)
+        requireSize(response, responseSize)
+        requireStatusWord(response, statusWord)
+        return response
+    }
+    
+    private fun requireSize(response: ByteArray, size: Int) {
+        if (response.size != size) {
+            throw IllegalArgumentException("APDU response size error: expected $size bytes but was ${response.size}")
+        }
+    }
+    
+    private fun requireStatusWord(response: ByteArray, statusWord: String) {
+        val sw = String.format("%02X%02X", response[response.size - 2], response[response.size - 1])
+        if (statusWord != sw) {
+            throw IllegalArgumentException("APDU error: expected status word $statusWord but was $sw")
+        }
+    }
+    
+    private fun toIntBigEndian(arr: ByteArray, offset: Int, length: Int): Int {
+        if (offset < 0 || offset + length > arr.size) {
+            throw IllegalArgumentException("Array too small: need $length bytes at offset $offset but size is ${arr.size}")
+        }
+        var result = 0
+        for (i in 0 until length) {
+            result = (result shl 8) or (arr[offset + i].toInt() and 0xFF)
+        }
+        return result
+    }
+    
+    private fun bcdToDecString(arr: ByteArray): String {
+        if (arr.size != 8) {
+            throw IllegalArgumentException("8 BCD bytes were expected from PAN, but they were ${arr.size}")
+        }
+        return arr.joinToString("") { byte ->
+            val i = byte.toInt() and 0xFF
+            val high = i ushr 4
+            val low = byte.toInt() and 0x0F
+            if (high >= 10 || low >= 10) {
+                throw IllegalArgumentException("Byte is not valid BCD: ${String.format("%02X", i)}")
+            }
+            "$high$low"
+        }
+    }
+    
+    private fun panToIep(arr: ByteArray, apli: String): String? {
+        if (apli.length != 2) {
+            throw IllegalArgumentException("Apli must have exactly 2 characters")
+        }
+        val pan16 = bcdToDecString(arr).padEnd(16, '0')
+        val result = pan16.substring(0, 6) + apli + pan16.substring(8, 15) + "0"
+        val partial = result.substring(0, 15)
+        return partial + luhnCheckDigit(result)
+    }
+    
+    private fun luhnCheckDigit(str: String): Char {
+        var sum = 0
+        var i = 0
+        str.forEach { char ->
+            i++
+            var digit = char.digitToInt()
+            if (i % 2 == (str.length + 1) % 2) {
+                digit *= 2
+            }
+            if (digit > 9) {
+                digit -= 9
+            }
+            sum += digit
+        }
+        return ((10 - (sum % 10)) % 10).digitToChar()
+    }
+    
+    private fun maskFirstNChars(str: String, n: Int): String {
+        if (str.length <= n) {
+            return "*".repeat(str.length)
+        }
+        return "*".repeat(n) + str.substring(n)
+    }
+    
+    private fun groupEvery(str: String, n: Int, separator: String = " "): String {
+        return str.chunked(n).joinToString(separator)
+    }
+}
+
@@ -0,0 +1,11 @@
+package com.pjpmosteiro.itartanas.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)
@@ -0,0 +1,58 @@
+package com.pjpmosteiro.itartanas.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun ITartanasTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}
@@ -0,0 +1,34 @@
+package com.pjpmosteiro.itartanas.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)
@@ -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"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        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>
@@ -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>
@@ -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>
@@ -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>
@@ -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>
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">iTartanas</string>
+</resources>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.ITartanas" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>
@@ -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>
@@ -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>
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <tech-list>
+        <tech>android.nfc.tech.IsoDep</tech>
+    </tech-list>
+</resources>
+
@@ -0,0 +1,17 @@
+package com.pjpmosteiro.itartanas
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}