Inicio de aplicacion

.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="25" />
+  </component>
+</project>

.idea/gradle.xml

@@ -5,6 +5,12 @@
       <GradleProjectSettings>
         <option name="testRunner" value="CHOOSE_PER_TEST" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
       </GradleProjectSettings>
     </option>
   </component>

.idea/misc.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" project-jdk-name="jbr-25" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

.idea/planningMode.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PlanningModeManager">
+    <option name="approvalStates">
+      <map>
+        <entry key="f9d713bb-3de6-48b7-9013-a05b442ed5a5" value="false" />
+      </map>
+    </option>
+  </component>
+</project>

app/build.gradle.kts

@@ -39,11 +39,16 @@ dependencies {
     implementation(platform(libs.androidx.compose.bom))
     implementation(libs.androidx.activity.compose)
     implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.compose.material.icons)
     implementation(libs.androidx.compose.ui)
     implementation(libs.androidx.compose.ui.graphics)
     implementation(libs.androidx.compose.ui.tooling.preview)
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.car.app)
+    implementation(libs.retrofit)
+    implementation(libs.retrofit.gson)
+    implementation(libs.play.services.location)
     testImplementation(libs.junit)
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.androidx.compose.ui.test.junit4)

app/src/main/AndroidManifest.xml

@@ -2,6 +2,17 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+
+    <uses-feature
+        android:name="android.hardware.type.automotive"
+        android:required="false" />
+    <uses-feature
+        android:name="android.software.car.templates_host"
+        android:required="false" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -11,6 +22,14 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Prueba">
+
+        <meta-data
+            android:name="com.google.android.gms.car.application"
+            android:resource="@xml/automotive_app_desc" />
+        <meta-data
+            android:name="androidx.car.app.minCarApiLevel"
+            android:value="1" />
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -23,6 +42,18 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <service
+            android:name=".MyCarAppService"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:permission="androidx.car.app.PERMISSION_CAR_APP">
+            <intent-filter>
+                <action android:name="androidx.car.app.CarAppService" />
+                <category android:name="androidx.car.app.category.POI" />
+            </intent-filter>
+        </service>
+
     </application>
 
 </manifest>

app/src/main/java/com/example/prueba/MainActivity.kt

@@ -1,29 +1,382 @@
 package com.example.prueba
 
+import android.Manifest
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.location.Geocoder
+import android.net.Uri
 import android.os.Bundle
 import androidx.activity.ComponentActivity
+import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.compose.foundation.layout.fillMaxSize
+import androidx.activity.result.contract.ActivityResultContracts
-import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.clickable
-import androidx.compose.material3.Scaffold
+import androidx.compose.foundation.layout.*
-import androidx.compose.material3.Text
+import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.runtime.Composable
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.material3.*
+import androidx.compose.material3.pulltorefresh.PullToRefreshBox
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat
+import com.example.prueba.data.GasStationInfo
+import com.example.prueba.data.GasStationRepository
 import com.example.prueba.ui.theme.PruebaTheme
+import com.example.prueba.utils.FavoriteStorage
+import com.example.prueba.utils.FuelRecord
+import com.example.prueba.utils.FuelStorage
+import com.example.prueba.utils.LocationStorage
+import com.google.android.gms.location.*
+import com.google.android.gms.tasks.CancellationTokenSource
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.util.Locale
 
 class MainActivity : ComponentActivity() {
+    private val repository = GasStationRepository()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
         setContent {
             PruebaTheme {
-                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                GasStationApp(repository)
-                    Greeting(
+            }
-                        name = "Android",
+        }
-                        modifier = Modifier.padding(innerPadding)
+    }
-                    )
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun GasStationApp(repository: GasStationRepository) {
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+    var stations by remember { mutableStateOf<List<GasStationInfo>>(emptyList()) }
+    var lastLocation by remember { mutableStateOf<android.location.Location?>(null) }
+    var fuelRecords by remember { mutableStateOf(FuelStorage.getRecords(context)) }
+    var showFuelDialog by remember { mutableStateOf<GasStationInfo?>(null) }
+    var editRecordDialog by remember { mutableStateOf<FuelRecord?>(null) }
+    var currentAddress by remember { mutableStateOf("Buscando ubicación...") }
+    var isLoading by remember { mutableStateOf(false) }
+    var isRefreshing by remember { mutableStateOf(false) }
+    var selectedTab by remember { mutableIntStateOf(0) }
+    
+    var hasPermission by remember {
+        mutableStateOf(
+            ContextCompat.checkSelfPermission(
+                context,
+                Manifest.permission.ACCESS_FINE_LOCATION
+            ) == PackageManager.PERMISSION_GRANTED
+        )
+    }
+
+    val launcher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.RequestPermission()
+    ) { isGranted ->
+        hasPermission = isGranted
+    }
+
+    suspend fun updateAddress(location: android.location.Location) {
+        withContext(Dispatchers.IO) {
+            try {
+                val geocoder = Geocoder(context, Locale.getDefault())
+                val addresses = geocoder.getFromLocation(location.latitude, location.longitude, 1)
+                if (!addresses.isNullOrEmpty()) {
+                    val address = addresses[0]
+                    val street = address.thoroughfare
+                    val number = address.subThoroughfare
+                    
+                    currentAddress = if (street != null && number != null) {
+                        "$street, $number"
+                    } else {
+                        street ?: address.getAddressLine(0) ?: "Ubicación desconocida"
+                    }
+                }
+            } catch (ignore: Exception) {}
+        }
+    }
+
+    LaunchedEffect(hasPermission) {
+        if (hasPermission) {
+            val fusedLocationClient = LocationServices.getFusedLocationProviderClient(context)
+            LocationStorage.getLastLocation(context)?.let { lastLoc ->
+                scope.launch {
+                    updateAddress(lastLoc)
+                    stations = repository.getCheapestAndNearest(context, lastLoc)
+                }
+            }
+
+            isLoading = true
+            val locationRequest = LocationRequest.Builder(Priority.PRIORITY_HIGH_ACCURACY, 10000)
+                .setMinUpdateDistanceMeters(500f)
+                .build()
+
+            val locationCallback = object : LocationCallback() {
+                override fun onLocationResult(result: LocationResult) {
+                    val location = result.lastLocation ?: return
+                    lastLocation = location
+                    LocationStorage.saveLocation(context, location)
+                    scope.launch {
+                        updateAddress(location)
+                        stations = repository.getCheapestAndNearest(context, location)
+                        isLoading = false
+                    }
+                }
+            }
+
+            try {
+                if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
+                    fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, android.os.Looper.getMainLooper())
+                }
+            } catch (e: Exception) {
+                isLoading = false
+            }
+        }
+    }
+
+    Scaffold(
+        modifier = Modifier.fillMaxSize(),
+        topBar = {
+            CenterAlignedTopAppBar(
+                title = { 
+                    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                        Text("Gasolineras Baratas", style = MaterialTheme.typography.titleSmall)
+                        Text(
+                            text = currentAddress,
+                            style = MaterialTheme.typography.bodyMedium,
+                            color = MaterialTheme.colorScheme.primary,
+                            maxLines = 1
+                        )
+                    }
+                }
+            )
+        },
+        bottomBar = {
+            NavigationBar {
+                NavigationBarItem(
+                    icon = { Icon(Icons.Default.Place, "Gasolineras") },
+                    label = { Text("Gasolineras") },
+                    selected = selectedTab == 0,
+                    onClick = { selectedTab = 0 }
+                )
+                NavigationBarItem(
+                    icon = { Icon(Icons.Default.Favorite, "Favoritas") },
+                    label = { Text("Favoritas") },
+                    selected = selectedTab == 1,
+                    onClick = { selectedTab = 1 }
+                )
+                NavigationBarItem(
+                    icon = { Icon(Icons.Default.DateRange, "Historial") },
+                    label = { Text("Historial") },
+                    selected = selectedTab == 2,
+                    onClick = { selectedTab = 2 }
+                )
+            }
+        }
+    ) { innerPadding ->
+        Box(modifier = Modifier.padding(innerPadding).fillMaxSize()) {
+            if (!hasPermission) {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    verticalArrangement = Arrangement.Center,
+                    horizontalAlignment = Alignment.CenterHorizontally
+                ) {
+                    Text("Se necesita permiso de ubicación")
+                    Button(onClick = { launcher.launch(Manifest.permission.ACCESS_FINE_LOCATION) }) {
+                        Text("Dar permiso")
+                    }
+                }
+            } else {
+                when (selectedTab) {
+                    0, 1 -> {
+                        PullToRefreshBox(
+                            isRefreshing = isRefreshing,
+                            onRefresh = {
+                                lastLocation?.let { loc ->
+                                    isRefreshing = true
+                                    scope.launch {
+                                        stations = repository.getCheapestAndNearest(context, loc, forceRefresh = true)
+                                        isRefreshing = false
+                                    }
+                                }
+                            },
+                            modifier = Modifier.fillMaxSize()
+                        ) {
+                            if (selectedTab == 0) {
+                                if (isLoading && stations.isEmpty()) {
+                                    CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+                                } else if (stations.isEmpty()) {
+                                    Text("No se encontraron gasolineras", modifier = Modifier.align(Alignment.Center))
+                                } else {
+                                    GasStationList(
+                                        stations = stations,
+                                        context = context,
+                                        scope = scope,
+                                        repository = repository,
+                                        lastLocation = lastLocation,
+                                        onLogClick = { showFuelDialog = it },
+                                        onUpdateStations = { stations = it }
+                                    )
+                                }
+                            } else {
+                                val favoriteStations = stations.filter { it.isFavorite }
+                                if (favoriteStations.isEmpty()) {
+                                    Text("No tienes gasolineras favoritas marcadas", modifier = Modifier.align(Alignment.Center))
+                                } else {
+                                    GasStationList(
+                                        stations = favoriteStations,
+                                        context = context,
+                                        scope = scope,
+                                        repository = repository,
+                                        lastLocation = lastLocation,
+                                        onLogClick = { showFuelDialog = it },
+                                        onUpdateStations = { stations = it }
+                                    )
+                                }
+                            }
+                        }
+                    }
+                    2 -> {
+                        FuelHistoryScreen(
+                            records = fuelRecords,
+                            onDelete = { record ->
+                                FuelStorage.deleteRecord(context, record)
+                                fuelRecords = FuelStorage.getRecords(context)
+                            },
+                            onEdit = { record ->
+                                editRecordDialog = record
+                            }
+                        )
+                    }
+                }
+            }
+
+            showFuelDialog?.let { station ->
+                FuelLogDialog(
+                    stationName = station.name,
+                    pricePerLiter = station.price,
+                    onDismiss = { showFuelDialog = null },
+                    onConfirm = { liters, total ->
+                        val record = FuelRecord(
+                            date = System.currentTimeMillis(),
+                            stationName = station.name,
+                            address = station.address,
+                            municipality = station.municipality,
+                            liters = liters,
+                            totalPrice = total,
+                            pricePerLiter = station.price
+                        )
+                        FuelStorage.saveRecord(context, record)
+                        fuelRecords = FuelStorage.getRecords(context)
+                        showFuelDialog = null
+                    }
+                )
+            }
+
+            editRecordDialog?.let { record ->
+                FuelLogDialog(
+                    stationName = record.stationName,
+                    pricePerLiter = record.pricePerLiter,
+                    initialLiters = record.liters.toString(),
+                    initialTotal = record.totalPrice.toString(),
+                    onDismiss = { editRecordDialog = null },
+                    onConfirm = { liters, total ->
+                        val newRecord = record.copy(
+                            liters = liters,
+                            totalPrice = total
+                        )
+                        FuelStorage.updateRecord(context, record, newRecord)
+                        fuelRecords = FuelStorage.getRecords(context)
+                        editRecordDialog = null
+                    }
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun GasStationList(
+    stations: List<GasStationInfo>,
+    context: android.content.Context,
+    scope: kotlinx.coroutines.CoroutineScope,
+    repository: GasStationRepository,
+    lastLocation: android.location.Location?,
+    onLogClick: (GasStationInfo) -> Unit,
+    onUpdateStations: (List<GasStationInfo>) -> Unit
+) {
+    LazyColumn(contentPadding = PaddingValues(vertical = 8.dp)) {
+        items(stations) { station ->
+            GasStationItem(
+                station = station,
+                onClick = {
+                    val uri = Uri.parse("geo:${station.latitude},${station.longitude}?q=${station.latitude},${station.longitude}(${Uri.encode(station.name)})")
+                    val intent = Intent(Intent.ACTION_VIEW, uri)
+                    context.startActivity(intent)
+                },
+                onLogClick = { onLogClick(station) },
+                onFavoriteClick = {
+                    FavoriteStorage.toggleFavorite(context, station.id)
+                    lastLocation?.let { loc ->
+                        scope.launch {
+                            onUpdateStations(repository.getCheapestAndNearest(context, loc))
+                        }
+                    }
+                }
+            )
+        }
+    }
+}
+
+@Composable
+fun FuelHistoryScreen(records: List<FuelRecord>, onDelete: (FuelRecord) -> Unit, onEdit: (FuelRecord) -> Unit) {
+    if (records.isEmpty()) {
+        Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+            Text("Aún no tienes repostajes registrados")
+        }
+    } else {
+        LazyColumn(contentPadding = PaddingValues(16.dp)) {
+            items(records) { record ->
+                Card(
+                    modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp),
+                    colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant)
+                ) {
+                    Column(modifier = Modifier.padding(16.dp)) {
+                        Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+                            Column(modifier = Modifier.weight(1f)) {
+                                Text(record.stationName, style = MaterialTheme.typography.titleMedium)
+                                Text("${record.municipality} - ${record.address}", style = MaterialTheme.typography.bodySmall)
+                            }
+                            Row {
+                                IconButton(onClick = { onEdit(record) }, modifier = Modifier.size(24.dp)) {
+                                    Icon(Icons.Default.Edit, contentDescription = "Editar", modifier = Modifier.size(18.dp))
+                                }
+                                Spacer(modifier = Modifier.width(8.dp))
+                                IconButton(onClick = { onDelete(record) }, modifier = Modifier.size(24.dp)) {
+                                    Icon(Icons.Default.Delete, contentDescription = "Eliminar", modifier = Modifier.size(18.dp), tint = MaterialTheme.colorScheme.error)
+                                }
+                            }
+                        }
+                        Text(
+                            android.text.format.DateFormat.format("dd/MM/yyyy", record.date).toString(),
+                            style = MaterialTheme.typography.labelSmall
+                        )
+                        Spacer(modifier = Modifier.height(4.dp))
+                        Text("${record.liters} L x ${record.pricePerLiter} €/L", style = MaterialTheme.typography.bodyMedium)
+                        Text(
+                            "Total: ${record.totalPrice} €",
+                            style = MaterialTheme.typography.titleLarge,
+                            color = MaterialTheme.colorScheme.primary
+                        )
+                    }
                 }
             }
         }
@@ -31,17 +384,122 @@ class MainActivity : ComponentActivity() {
 }
 
 @Composable
-fun Greeting(name: String, modifier: Modifier = Modifier) {
+fun FuelLogDialog(
-    Text(
+    stationName: String, 
-        text = "Hello $name!",
+    pricePerLiter: Double,
-        modifier = modifier
+    initialLiters: String = "",
+    initialTotal: String = "",
+    onDismiss: () -> Unit, 
+    onConfirm: (Double, Double) -> Unit
+) {
+    var liters by remember { mutableStateOf(initialLiters) }
+    var total by remember { mutableStateOf(initialTotal) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Registrar Repostaje") },
+        text = {
+            Column {
+                Text(stationName, style = MaterialTheme.typography.bodyLarge)
+                Spacer(modifier = Modifier.height(8.dp))
+                OutlinedTextField(
+                    value = liters,
+                    onValueChange = { liters = it },
+                    label = { Text("Litros") },
+                    modifier = Modifier.fillMaxWidth()
+                )
+                OutlinedTextField(
+                    value = total,
+                    onValueChange = { total = it },
+                    label = { Text("Precio Total (€)") },
+                    modifier = Modifier.fillMaxWidth()
+                )
+            }
+        },
+        confirmButton = {
+            Button(onClick = {
+                val l = liters.toDoubleOrNull() ?: 0.0
+                val t = total.toDoubleOrNull() ?: 0.0
+                if (l > 0 && t > 0) onConfirm(l, t)
+            }) { Text("Guardar") }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text("Cancelar") }
+        }
     )
 }
 
-@Preview(showBackground = true)
 @Composable
-fun GreetingPreview() {
+fun GasStationItem(station: GasStationInfo, onClick: () -> Unit, onLogClick: () -> Unit, onFavoriteClick: () -> Unit) {
-    PruebaTheme {
+    Card(
-        Greeting("Android")
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(horizontal = 16.dp, vertical = 6.dp)
+            .clickable { onClick() },
+        elevation = CardDefaults.cardElevation(defaultElevation = 2.dp)
+    ) {
+        Column(modifier = Modifier.padding(16.dp)) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.SpaceBetween
+            ) {
+                Column(modifier = Modifier.weight(1f)) {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Text(
+                            text = "${station.name} - ${station.municipality}",
+                            style = MaterialTheme.typography.titleMedium,
+                            maxLines = 1,
+                            modifier = Modifier.weight(1f)
+                        )
+                        IconButton(onClick = onFavoriteClick) {
+                            Icon(
+                                imageVector = if (station.isFavorite) Icons.Default.Favorite else Icons.Default.FavoriteBorder,
+                                contentDescription = "Favorito",
+                                tint = if (station.isFavorite) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.outline
+                            )
+                        }
+                    }
+                    Text(
+                        text = station.address,
+                        style = MaterialTheme.typography.bodySmall,
+                        maxLines = 1
+                    )
+                }
+                Surface(
+                    color = MaterialTheme.colorScheme.secondaryContainer,
+                    shape = MaterialTheme.shapes.medium
+                ) {
+                    Text(
+                        text = "${String.format(Locale.getDefault(), "%.1f", station.distance / 1000)} km",
+                        modifier = Modifier.padding(horizontal = 10.dp, vertical = 6.dp),
+                        style = MaterialTheme.typography.labelLarge,
+                        color = MaterialTheme.colorScheme.onSecondaryContainer
+                    )
+                }
+            }
+            Spacer(modifier = Modifier.height(8.dp))
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text = "${station.price} €/L",
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.primary,
+                    fontWeight = androidx.compose.ui.text.font.FontWeight.Bold
+                )
+                Button(
+                    onClick = onLogClick,
+                    contentPadding = PaddingValues(horizontal = 12.dp, vertical = 4.dp),
+                    shape = MaterialTheme.shapes.small
+                ) {
+                    Icon(Icons.Default.Add, contentDescription = null, modifier = Modifier.size(16.dp))
+                    Spacer(modifier = Modifier.width(4.dp))
+                    Text("Registrar")
+                }
+            }
+        }
     }
-}
+}

app/src/main/java/com/example/prueba/MainScreen.kt

@@ -0,0 +1,225 @@
+package com.example.prueba
+
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.location.Geocoder
+import android.location.Location
+import android.net.Uri
+import androidx.car.app.CarContext
+import androidx.car.app.Screen
+import androidx.car.app.model.*
+import androidx.lifecycle.lifecycleScope
+import com.example.prueba.data.GasStationInfo
+import com.example.prueba.data.GasStationRepository
+import com.example.prueba.utils.FavoriteStorage
+import com.example.prueba.utils.FuelRecord
+import com.example.prueba.utils.FuelStorage
+import com.example.prueba.utils.LocationStorage
+import com.google.android.gms.location.*
+import com.google.android.gms.tasks.CancellationTokenSource
+import java.util.Locale
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+class MainScreen(carContext: CarContext) : Screen(carContext) {
+    private var gasStations: List<GasStationInfo> = emptyList()
+    private var currentAddress: String? = null
+    private var isLoading = true
+    private val repository = GasStationRepository()
+
+    init {
+        fetchLocationAndGasStations()
+    }
+
+    private suspend fun updateAddress(location: Location) {
+        withContext(Dispatchers.IO) {
+            try {
+                val geocoder = Geocoder(carContext, Locale.getDefault())
+                val addresses = geocoder.getFromLocation(location.latitude, location.longitude, 1)
+                if (!addresses.isNullOrEmpty()) {
+                    val address = addresses[0]
+                    val street = address.thoroughfare
+                    val number = address.subThoroughfare
+
+                    currentAddress = if (street != null && number != null) {
+                        "$street, $number"
+                    } else {
+                        street ?: address.getAddressLine(0)
+                    }
+                }
+            } catch (e: Exception) {
+                // Silencioso
+            }
+        }
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun fetchLocationAndGasStations(forceRefresh: Boolean = false) {
+        val fusedLocationClient = LocationServices.getFusedLocationProviderClient(carContext)
+
+        // Cargar última ubicación guardada inmediatamente si no es un refresh forzado
+        if (!forceRefresh) {
+            LocationStorage.getLastLocation(carContext)?.let { lastLoc ->
+                lifecycleScope.launch {
+                    updateAddress(lastLoc)
+                    gasStations = repository.getCheapestAndNearest(carContext, lastLoc)
+                    invalidate()
+                }
+            }
+        }
+
+        val locationRequest = LocationRequest.Builder(Priority.PRIORITY_HIGH_ACCURACY, 15000)
+            .setMinUpdateDistanceMeters(500f)
+            .build()
+
+        val locationCallback = object : LocationCallback() {
+            override fun onLocationResult(result: LocationResult) {
+                val location = result.lastLocation ?: return
+                LocationStorage.saveLocation(carContext, location)
+                lifecycleScope.launch {
+                    updateAddress(location)
+                    gasStations = repository.getCheapestAndNearest(carContext, location, forceRefresh)
+                    isLoading = false
+                    invalidate()
+                }
+                // Si era un forceRefresh, después de la primera actualización volvemos a false
+                // para que los updates automáticos del GPS no sigan forzando red innecesariamente
+                if (forceRefresh) {
+                    fusedLocationClient.removeLocationUpdates(this)
+                    fetchLocationAndGasStations(false) 
+                }
+            }
+        }
+
+        fusedLocationClient.requestLocationUpdates(
+            locationRequest,
+            locationCallback,
+            carContext.mainLooper
+        )
+    }
+
+    override fun onGetTemplate(): Template {
+        val listBuilder = ItemList.Builder()
+
+        val refreshAction = Action.Builder()
+            .setTitle("Refrescar")
+            .setOnClickListener {
+                isLoading = true
+                invalidate()
+                fetchLocationAndGasStations(forceRefresh = true)
+            }
+            .build()
+
+        if (isLoading && gasStations.isEmpty()) {
+            return MessageTemplate.Builder("Buscando gasolineras...")
+                .setLoading(true)
+                .setHeader(
+                    Header.Builder()
+                        .setStartHeaderAction(Action.APP_ICON)
+                        .setTitle("Gasolineras")
+                        .build()
+                )
+                .build()
+        }
+
+        if (gasStations.isEmpty()) {
+            return MessageTemplate.Builder("No se encontraron gasolineras o no hay permiso de ubicación.")
+                .setHeader(
+                    Header.Builder()
+                        .setStartHeaderAction(Action.APP_ICON)
+                        .setTitle("Gasolineras")
+                        .addEndHeaderAction(refreshAction)
+                        .build()
+                )
+                .addAction(
+                    Action.Builder()
+                        .setTitle("Reintentar")
+                        .setOnClickListener {
+                            isLoading = true
+                            invalidate()
+                            fetchLocationAndGasStations()
+                        }
+                        .build()
+                )
+                .build()
+        }
+
+        for (station in gasStations) {
+            val distanceStr = String.format(Locale.getDefault(), "%.1f km", station.distance / 1000)
+            listBuilder.addItem(
+                Row.Builder()
+                    .setTitle("${station.name} - ${station.municipality}")
+                    .addText("${station.price} €/L  •  $distanceStr")
+                    .addText(station.address)
+                    .setOnClickListener {
+                        val pane = Pane.Builder()
+                            .addRow(Row.Builder().setTitle("Precio").addText("${station.price} €/L").build())
+                            .addRow(Row.Builder().setTitle("Distancia").addText(distanceStr).build())
+                            .addAction(
+                                Action.Builder()
+                                    .setTitle(if (station.isFavorite) "Quitar Favorito" else "Añadir Favorito")
+                                    .setOnClickListener {
+                                        FavoriteStorage.toggleFavorite(carContext, station.id)
+                                        screenManager.pop()
+                                        fetchLocationAndGasStations(forceRefresh = false)
+                                    }
+                                    .build()
+                            )
+                            .addAction(
+                                Action.Builder()
+                                    .setTitle("Ir ahora")
+                                    .setOnClickListener {
+                                        val uri = Uri.parse("geo:${station.latitude},${station.longitude}?q=${station.latitude},${station.longitude}")
+                                        val intent = Intent(CarContext.ACTION_NAVIGATE, uri)
+                                        carContext.startCarApp(intent)
+                                    }
+                                    .build()
+                            )
+                            .addAction(
+                                Action.Builder()
+                                    .setTitle("Registrar Repostaje")
+                                    .setOnClickListener {
+                                        // Guardar record simplificado desde el coche
+                                        val record = FuelRecord(
+                                            date = System.currentTimeMillis(),
+                                            stationName = station.name,
+                                            address = station.address,
+                                            municipality = station.municipality,
+                                            liters = 0.0, // Se editará en el móvil después
+                                            totalPrice = 0.0,
+                                            pricePerLiter = station.price
+                                        )
+                                        FuelStorage.saveRecord(carContext, record)
+                                        screenManager.pop()
+                                    }
+                                    .build()
+                            )
+                            .build()
+
+                        screenManager.push(
+                            object : Screen(carContext) {
+                                override fun onGetTemplate(): Template {
+                                    return PaneTemplate.Builder(pane)
+                                        .setHeader(Header.Builder().setTitle(station.name).setStartHeaderAction(Action.BACK).build())
+                                        .build()
+                                }
+                            }
+                        )
+                    }
+                    .build()
+            )
+        }
+
+        return ListTemplate.Builder()
+            .setSingleList(listBuilder.build())
+            .setHeader(
+                Header.Builder()
+                    .setStartHeaderAction(Action.APP_ICON)
+                    .setTitle(currentAddress ?: "Gasolineras más baratas")
+                    .addEndHeaderAction(refreshAction)
+                    .build()
+            )
+            .build()
+    }
+}

app/src/main/java/com/example/prueba/MyCarAppService.kt

@@ -0,0 +1,21 @@
+package com.example.prueba
+
+import android.content.Intent
+import android.content.pm.ApplicationInfo
+import androidx.car.app.CarAppService
+import androidx.car.app.Session
+import androidx.car.app.validation.HostValidator
+
+class MyCarAppService : CarAppService() {
+    override fun createHostValidator(): HostValidator {
+        return HostValidator.ALLOW_ALL_HOSTS_VALIDATOR
+    }
+
+    override fun onCreateSession(): Session {
+        return object : Session() {
+            override fun onCreateScreen(intent: Intent): androidx.car.app.Screen {
+                return MainScreen(carContext)
+            }
+        }
+    }
+}

app/src/main/java/com/example/prueba/data/GasStationRepository.kt

@@ -0,0 +1,69 @@
+package com.example.prueba.data
+
+import android.content.Context
+import android.location.Location
+import com.example.prueba.utils.FavoriteStorage
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+class GasStationRepository {
+    private var cachedResponse: GasolineraResponse? = null
+    
+    private val api: GasolineraApi = Retrofit.Builder()
+        .baseUrl("https://sedeaplicaciones.minetur.gob.es/ServiciosRESTCarburantes/PreciosCarburantes/")
+        .addConverterFactory(GsonConverterFactory.create())
+        .build()
+        .create(GasolineraApi::class.java)
+
+    suspend fun getCheapestAndNearest(context: Context, userLocation: Location, forceRefresh: Boolean = false): List<GasStationInfo> {
+        return try {
+            if (cachedResponse == null || forceRefresh) {
+                cachedResponse = api.getGasolineras()
+            }
+            
+            val favorites = FavoriteStorage.getFavoriteIds(context)
+            
+            cachedResponse?.listaEESS?.mapNotNull {
+                val lat = it.latitud.replace(",", ".").toDoubleOrNull()
+                val lon = it.longitud.replace(",", ".").toDoubleOrNull()
+                val price = it.precioDiesel.replace(",", ".").toDoubleOrNull() ?: it.precioGasolina95.replace(",", ".").toDoubleOrNull()
+
+                if (lat != null && lon != null && price != null) {
+                    val stationLoc = Location("").apply {
+                        latitude = lat
+                        longitude = lon
+                    }
+                    val distance = userLocation.distanceTo(stationLoc)
+                    GasStationInfo(
+                        id = it.id,
+                        name = it.rotulo,
+                        address = it.direccion,
+                        municipality = it.municipio,
+                        price = price,
+                        distance = distance,
+                        latitude = lat,
+                        longitude = lon,
+                        isFavorite = favorites.contains(it.id)
+                    )
+                } else null
+            }?.sortedBy { it.distance }
+             ?.take(50)
+             ?.sortedWith(compareByDescending<GasStationInfo> { it.isFavorite }.thenBy { it.price })
+             ?.take(10) ?: emptyList()
+        } catch (e: Exception) {
+            emptyList()
+        }
+    }
+}
+
+data class GasStationInfo(
+    val id: String,
+    val name: String,
+    val address: String,
+    val municipality: String,
+    val price: Double,
+    val distance: Float,
+    val latitude: Double,
+    val longitude: Double,
+    val isFavorite: Boolean = false
+)

app/src/main/java/com/example/prueba/data/GasolineraApi.kt

@@ -0,0 +1,33 @@
+package com.example.prueba.data
+
+import com.google.gson.annotations.SerializedName
+import retrofit2.http.GET
+
+data class GasolineraResponse(
+    @SerializedName("ListaEESSPrecio")
+    val listaEESS: List<Gasolinera>
+)
+
+data class Gasolinera(
+    @SerializedName("IDEESS")
+    val id: String,
+    @SerializedName("Rótulo")
+    val rotulo: String,
+    @SerializedName("Dirección")
+    val direccion: String,
+    @SerializedName("Municipio")
+    val municipio: String,
+    @SerializedName("Precio Gasoleo A")
+    val precioDiesel: String,
+    @SerializedName("Precio Gasolina 95 E5")
+    val precioGasolina95: String,
+    @SerializedName("Latitud")
+    val latitud: String,
+    @SerializedName("Longitud (WGS84)")
+    val longitud: String
+)
+
+interface GasolineraApi {
+    @GET("EstacionesTerrestres/")
+    suspend fun getGasolineras(): GasolineraResponse
+}

app/src/main/java/com/example/prueba/utils/FavoriteStorage.kt

@@ -0,0 +1,30 @@
+package com.example.prueba.utils
+
+import android.content.Context
+
+object FavoriteStorage {
+    private const val PREFS_NAME = "favorite_prefs"
+    private const val KEY_FAVORITES = "favorite_ids"
+
+    fun toggleFavorite(context: Context, stationId: String) {
+        val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        val favorites = getFavoriteIds(context).toMutableSet()
+        
+        if (favorites.contains(stationId)) {
+            favorites.remove(stationId)
+        } else {
+            favorites.add(stationId)
+        }
+        
+        prefs.edit().putStringSet(KEY_FAVORITES, favorites).apply()
+    }
+
+    fun getFavoriteIds(context: Context): Set<String> {
+        val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        return prefs.getStringSet(KEY_FAVORITES, emptySet()) ?: emptySet()
+    }
+
+    fun isFavorite(context: Context, stationId: String): Boolean {
+        return getFavoriteIds(context).contains(stationId)
+    }
+}

app/src/main/java/com/example/prueba/utils/FuelStorage.kt

@@ -0,0 +1,57 @@
+package com.example.prueba.utils
+
+import android.content.Context
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+
+data class FuelRecord(
+    val date: Long,
+    val stationName: String,
+    val address: String,
+    val municipality: String,
+    val liters: Double,
+    val totalPrice: Double,
+    val pricePerLiter: Double
+)
+
+object FuelStorage {
+    private const val PREFS_NAME = "fuel_prefs"
+    private const val KEY_RECORDS = "fuel_records"
+    private val gson = Gson()
+
+    fun saveRecord(context: Context, record: FuelRecord) {
+        val records = getRecords(context).toMutableList()
+        records.add(0, record) // Añadir al principio
+        saveAllRecords(context, records)
+    }
+
+    fun getRecords(context: Context): List<FuelRecord> {
+        val json = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+            .getString(KEY_RECORDS, null) ?: return emptyList()
+        val type = object : TypeToken<List<FuelRecord>>() {}.type
+        return gson.fromJson(json, type)
+    }
+
+    fun deleteRecord(context: Context, record: FuelRecord) {
+        val records = getRecords(context).toMutableList()
+        records.remove(record)
+        saveAllRecords(context, records)
+    }
+
+    fun updateRecord(context: Context, oldRecord: FuelRecord, newRecord: FuelRecord) {
+        val records = getRecords(context).toMutableList()
+        val index = records.indexOf(oldRecord)
+        if (index != -1) {
+            records[index] = newRecord
+            saveAllRecords(context, records)
+        }
+    }
+
+    private fun saveAllRecords(context: Context, records: List<FuelRecord>) {
+        val json = gson.toJson(records)
+        context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+            .edit()
+            .putString(KEY_RECORDS, json)
+            .apply()
+    }
+}

app/src/main/java/com/example/prueba/utils/LocationStorage.kt

@@ -0,0 +1,31 @@
+package com.example.prueba.utils
+
+import android.content.Context
+import android.location.Location
+
+object LocationStorage {
+    private const val PREFS_NAME = "location_prefs"
+    private const val KEY_LAT = "last_lat"
+    private const val KEY_LON = "last_lon"
+
+    fun saveLocation(context: Context, location: Location) {
+        val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        prefs.edit()
+            .putFloat(KEY_LAT, location.latitude.toFloat())
+            .putFloat(KEY_LON, location.longitude.toFloat())
+            .apply()
+    }
+
+    fun getLastLocation(context: Context): Location? {
+        val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        val lat = prefs.getFloat(KEY_LAT, 0f)
+        val lon = prefs.getFloat(KEY_LON, 0f)
+
+        if (lat == 0f && lon == 0f) return null
+
+        return Location("stored").apply {
+            latitude = lat.toDouble()
+            longitude = lon.toDouble()
+        }
+    }
+}

app/src/main/res/xml/automotive_app_desc.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<automotiveApp>
+    <uses name="template" />
+</automotiveApp>

gradle/gradle-daemon-jvm.properties

@@ -0,0 +1,12 @@
+#This file is generated by updateDaemonJvm
+toolchainUrl.FREE_BSD.AARCH64=https\://api.foojay.io/disco/v3.0/ids/cf726b4a1c84b50457225f9bba6d7650/redirect
+toolchainUrl.FREE_BSD.X86_64=https\://api.foojay.io/disco/v3.0/ids/fa1e318c287360478e3c83a9a3ef1007/redirect
+toolchainUrl.LINUX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/cf726b4a1c84b50457225f9bba6d7650/redirect
+toolchainUrl.LINUX.X86_64=https\://api.foojay.io/disco/v3.0/ids/fa1e318c287360478e3c83a9a3ef1007/redirect
+toolchainUrl.MAC_OS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/c2dd35c9d0aaf0ba6ad0791320f99dfc/redirect
+toolchainUrl.MAC_OS.X86_64=https\://api.foojay.io/disco/v3.0/ids/e5810bd7fd1f8a586644409d395a7e55/redirect
+toolchainUrl.UNIX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/cf726b4a1c84b50457225f9bba6d7650/redirect
+toolchainUrl.UNIX.X86_64=https\://api.foojay.io/disco/v3.0/ids/fa1e318c287360478e3c83a9a3ef1007/redirect
+toolchainUrl.WINDOWS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/7b3c4877c0749019e6805bb61e421497/redirect
+toolchainUrl.WINDOWS.X86_64=https\://api.foojay.io/disco/v3.0/ids/d76df094a9cbbabd3b08251f9e61444a/redirect
+toolchainVersion=25

gradle/libs.versions.toml

@@ -8,6 +8,9 @@ lifecycleRuntimeKtx = "2.11.0"
 activityCompose = "1.13.0"
 kotlin = "2.2.10"
 composeBom = "2026.02.01"
+androidx-car-app = "1.7.0"
+retrofit = "2.9.0"
+playServicesLocation = "21.3.0"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -24,6 +27,11 @@ androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "u
 androidx-compose-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
 androidx-compose-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
 androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-compose-material-icons = { group = "androidx.compose.material", name = "material-icons-extended" }
+androidx-car-app = { group = "androidx.car.app", name = "app", version.ref = "androidx-car-app" }
+retrofit = { group = "com.squareup.retrofit2", name = "retrofit", version.ref = "retrofit" }
+retrofit-gson = { group = "com.squareup.retrofit2", name = "converter-gson", version.ref = "retrofit" }
+play-services-location = { group = "com.google.android.gms", name = "play-services-location", version.ref = "playServicesLocation" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }