init

app/build.gradle.kts

@@ -102,4 +102,5 @@ dependencies {
     implementation("io.ktor:ktor-client-core:3.4.1")
     implementation("io.ktor:ktor-client-okhttp:3.4.1")
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json-jvm:1.10.0")
+    implementation("org.apache.commons:commons-csv:1.5")
 }

app/src/main/AndroidManifest.xml

@@ -21,6 +21,16 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths"/>
+        </provider>
     </application>
 
+
 </manifest>

app/src/main/java/cc/n0th1ng/tripmoney/navigation/CustomNavigationDrawer.kt

@@ -18,6 +18,7 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
+import cc.n0th1ng.tripmoney.R.string
 import com.composables.icons.materialsymbols.outlined.R
 import kotlinx.coroutines.launch
 
@@ -32,7 +33,7 @@ fun CustomNavigationDrawer(
                 Text("Trip Money", modifier = Modifier.padding(16.dp))
                 HorizontalDivider()
                 NavigationDrawerItem(
-                    label = { Text(text = "Pick trip") },
+                    label = { Text(text = stringResource(string.pick_trip)) },
                     selected = false,
                     onClick = {
                         navController.navigate(Screens.TRIP_PICKER)
@@ -48,7 +49,7 @@ fun CustomNavigationDrawer(
                         )
                     })
                 NavigationDrawerItem(
-                    label = { Text(text = "List of expenses") },
+                    label = { Text(text = stringResource(string.list_of_expenses)) },
                     selected = false,
                     onClick = {
                         navController.navigate(Screens.LIST_EXPENSE)
@@ -64,7 +65,7 @@ fun CustomNavigationDrawer(
                         )
                     })
                 NavigationDrawerItem(
-                    label = { Text(text = "Statistics") },
+                    label = { Text(text = stringResource(string.statistics)) },
                     selected = false,
                     onClick = {
                         navController.navigate(Screens.STATISTICS)
@@ -80,7 +81,7 @@ fun CustomNavigationDrawer(
                         )
                     })
                 NavigationDrawerItem(
-                    label = { Text(text = "Settings") },
+                    label = { Text(text = stringResource(string.settings)) },
                     selected = false,
                     onClick = {
                         navController.navigate(Screens.SETTINGS)
@@ -88,7 +89,7 @@ fun CustomNavigationDrawer(
                             drawerState.close()
                         }
                     },
-                    icon = { Icon(Icons.Default.Settings, contentDescription = "settings") }
+                    icon = { Icon(Icons.Default.Settings, contentDescription = stringResource(string.settings)) }
                 )
             }
         }) { content() }

app/src/main/java/cc/n0th1ng/tripmoney/navigation/TopBar.kt

@@ -11,6 +11,7 @@ import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.res.stringResource
 import androidx.navigation.NavHostController
+import cc.n0th1ng.tripmoney.R
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -31,7 +32,7 @@ fun TopBar(onClick: () -> Unit, title: String = "") {
 fun TopBarSettings(navController: NavHostController) {
 
     TopAppBar(
-        title = { Text("Settings") },
+        title = { Text(stringResource(R.string.settings)) },
         navigationIcon = {
             IconButton(onClick = { navController.popBackStack() }) {
                 Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Back")

app/src/main/java/cc/n0th1ng/tripmoney/screens/addexpense/AddExpenseBottomSheet.kt

@@ -1,6 +1,7 @@
 package cc.n0th1ng.tripmoney.screens.addexpense
 
 import android.annotation.SuppressLint
+import android.graphics.drawable.PaintDrawable
 import android.os.Build
 import androidx.annotation.RequiresApi
 import androidx.compose.foundation.clickable
@@ -21,9 +22,14 @@ import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.filled.Check
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonColors
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.DividerDefaults
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
@@ -34,6 +40,7 @@ import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableDoubleStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -42,10 +49,13 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.painter.Painter
 import androidx.compose.ui.layout.ModifierLocalBeyondBoundsLayout
+import androidx.compose.ui.modifier.modifierLocalMapOf
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.sensitiveContent
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardType
@@ -59,21 +69,24 @@ import cc.n0th1ng.tripmoney.R
 import cc.n0th1ng.tripmoney.data.entity.Category
 import cc.n0th1ng.tripmoney.data.entity.Expense
 import cc.n0th1ng.tripmoney.data.entity.ExpenseDto
+import cc.n0th1ng.tripmoney.data.entity.Trip
 import cc.n0th1ng.tripmoney.screens.listexpense.CategorySelectionDialog
 import cc.n0th1ng.tripmoney.screens.listexpense.CurrencySelectionDialog
 import cc.n0th1ng.tripmoney.screens.listexpense.DateTimePicker
 import cc.n0th1ng.tripmoney.theme.TripMoneyTheme
+import cc.n0th1ng.tripmoney.utils.AllPreviews
 import cc.n0th1ng.tripmoney.utils.Currencies
+import cc.n0th1ng.tripmoney.utils.colors
 import cc.n0th1ng.tripmoney.viewmodel.ExpenseAndCategoryViewModel
 import cc.n0th1ng.tripmoney.viewmodel.SettingsViewModel
 import cc.n0th1ng.tripmoney.viewmodel.TripViewModel
+import com.composables.icons.materialsymbols.outlined.R.drawable
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
-
-
+import kotlin.collections.listOf
 
 @OptIn(ExperimentalMaterial3Api::class)
 @RequiresApi(Build.VERSION_CODES.O)
@@ -88,23 +101,48 @@ fun AddExpenseBottomSheet(
     val expenseAndCategoryViewModel: ExpenseAndCategoryViewModel = hiltViewModel()
     val settingsViewModel: SettingsViewModel = hiltViewModel()
     val currentTripId by settingsViewModel.currentTrip.collectAsState()
-    val currentTrip = tripViewModel.getTrip(currentTripId)
+    val currentTrip = tripViewModel.getTrip(currentTripId)!!
     val categories by expenseAndCategoryViewModel.getCategories().collectAsState(emptyList())
+    AddExpenseBottomSheet(
+        onSave = onSave,
+        onDismiss = onDismiss,
+        expenseDtoToEdit = expenseDtoToEdit,
+        state = state,
+        currentTrip = currentTrip,
+        categories = categories
+    )
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@RequiresApi(Build.VERSION_CODES.O)
+@Composable
+fun AddExpenseBottomSheet(
+    onSave: (Expense) -> Unit,
+    onDismiss: () -> Unit,
+    expenseDtoToEdit: ExpenseDto?,
+    state: SheetState,
+    currentTrip: Trip,
+    categories: List<Category>
+) {
+    val currentTripId = currentTrip.id
+
     if (categories.isEmpty()) {
         return
     }
+
     var amount by remember {
         mutableStateOf(
             expenseDtoToEdit?.expense?.amount?.toString() ?: "0.00"
         )
     }
+    var equationResult by remember { mutableDoubleStateOf(0.0) }
     val dummyFocusRequester = remember { FocusRequester() }
     var showCurrencyDialog by remember { mutableStateOf(false) }
     var showCategoryDialog by remember { mutableStateOf(false) }
     var showDateTimePicker by remember { mutableStateOf(false) }
     var currency by remember {
         mutableStateOf(
-            expenseDtoToEdit?.expense?.currency ?: currentTrip?.currency ?: Currencies.default().name
+            expenseDtoToEdit?.expense?.currency ?: currentTrip.currency
         )
     }
     var category by remember { mutableStateOf(expenseDtoToEdit?.category ?: categories[0]) }
@@ -122,6 +160,8 @@ fun AddExpenseBottomSheet(
     ModalBottomSheet(
         onDismissRequest = onDismiss,
         sheetState = state,
+        containerColor = MaterialTheme.colorScheme.surfaceContainer,
+        contentColor = MaterialTheme.colorScheme.onSecondaryContainer
     ) {
         Column(
             modifier = Modifier
@@ -135,96 +175,127 @@ fun AddExpenseBottomSheet(
                     .fillMaxWidth()
                     .padding(start = 15.dp),
                 text = stringResource(if (expenseDtoToEdit == null) R.string.add_expense else R.string.edit_expense),
-                fontWeight = FontWeight.Bold,
-                fontSize = 35.sp,
+                style = MaterialTheme.typography.displaySmall,
                 textAlign = TextAlign.Start
             )
-            HorizontalDivider(modifier = Modifier.fillMaxWidth())
-            Row(
-                modifier = Modifier.fillMaxWidth(0.9f),
-                verticalAlignment = Alignment.CenterVertically,
-                horizontalArrangement = Arrangement.SpaceBetween
+            HorizontalDivider(
+                modifier = Modifier.fillMaxWidth(),
+                color = MaterialTheme.colorScheme.onSecondaryContainer
+            )
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.spacedBy(10.dp),
+                modifier = Modifier.padding(10.dp)
             ) {
-                Text(
-                    text = amount.ifEmpty { "0.00" },
-                    fontSize = 25.sp,
-                    fontWeight = FontWeight.Bold
-                )
-                CurrencyButton(onClick = { showCurrencyDialog = true }, text = currency)
-            }
-            Row(
-                modifier = Modifier.fillMaxWidth(0.9f),
-                verticalAlignment = Alignment.CenterVertically,
-                horizontalArrangement = Arrangement.spacedBy(10.dp)
-            ) {
-                OutlinedButton(
-                    onClick = { showDateTimePicker = true },
-                    modifier = Modifier.weight(1f)
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
                 ) {
-                    Text(
-                        text = datetime.format(DateTimeFormatter.ofPattern("dd.MM HH:mm")),
-                        fontSize = 17.sp
-                    )
+                    Column{
+                        Text(
+                            text = amount.ifEmpty { "0.00" },
+                            fontSize = 25.sp,
+                            fontWeight = FontWeight.Bold
+                        )
+                        Text(
+                            text = if(amount.contains(Regex("[+\\/*-]\\d+"))) "%.2f".format(equationResult) else "",
+                            fontSize = 14.sp,
+                        )
+                    }
+                    CurrencyButton(onClick = { showCurrencyDialog = true }, text = currency)
                 }
-                CategoryButton(
-                    onClick = { showCategoryDialog = true },
-                    category = category,
-                    modifier = Modifier.weight(1f)
+                Box(
+                    modifier = Modifier
+                        .size(0.dp)
+                        .focusRequester(dummyFocusRequester)
+                        .focusable()
                 )
-
-            }
-            Row(
-                verticalAlignment = Alignment.CenterVertically,
-            ) {
                 NoteInput(
                     note = note,
                     onTextChange = { newNote -> note = newNote },
-                    modifier = Modifier.fillMaxWidth(0.9f),
+                    modifier = Modifier.fillMaxWidth(),
                     focusRequester = dummyFocusRequester
                 )
-            }
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(10.dp)
+                ) {
+                    Button(
+                        onClick = { showDateTimePicker = true },
+                        modifier = Modifier.weight(1f),
+                        shape = MaterialTheme.shapes.medium,
 
-            Box(
-                modifier = Modifier
-                    .size(0.dp)
-                    .focusRequester(dummyFocusRequester)
-                    .focusable()
-            )
-            NumberKeyboard(
-                onNumberClick = { number ->
-                    val newText = (if (amount == "0.00") "" else amount) + number
-                    if (newText.isDoubleTwoDigitsAboveZero()) {
-                        amount = newText
-                        enableSave = true
-                    } else if (amount == "0.00") {
-                        enableSave = false
+                        ) {
+                        Text(
+                            text = datetime.format(DateTimeFormatter.ofPattern("dd.MM HH:mm")),
+                            fontSize = 17.sp
+                        )
                     }
-                    dummyFocusRequester.requestFocus()
-                },
-                onBackspaceClick = {
-                    if (amount == "0.00") return@NumberKeyboard
-                    amount = amount.safeSubstring(0, amount.length - 1)
-                    enableSave = amount.isDoubleTwoDigitsAboveZero()
-                },
-                onSave = {
-                    val expenseToSave = Expense(
-                        amount = amount.toDouble(),
-                        currency = currency,
-                        note = note,
-                        datetime = datetime.toString(),
-                        categoryId = category.id,
-                        tripId = currentTripId
+                    CategoryButton(
+                        onClick = { showCategoryDialog = true },
+                        category = category,
+                        modifier = Modifier.weight(1f)
                     )
-                    onSave(
-                        if (expenseDtoToEdit == null) expenseToSave
-                        else expenseToSave.copy(id = expenseDtoToEdit.expense.id)
-                    )
-                }, enableSave = enableSave
-            )
 
+                }
+
+                NumberKeyboard(
+                    modifier = Modifier.fillMaxWidth(),
+                    onOperatorClick = { operator ->
+                        if(amount.isDoubleTwoDigitsOrEquation() && amount.contains(Regex("[+\\/*-]\\d+"))) {
+                            amount = evaluate(amount).toString()
+//                            equationResult = 0.0
+                        }
+                        val newText = amount + operator
+                        if(newText.isDoubleTwoDigitsOrEquation()) {
+                            amount = newText
+                            enableSave = false
+                        }
+                    },
+                    onNumberClick = { number ->
+                        val newText = (if (amount == "0.00") "" else amount) + number
+                        if (newText.isDoubleTwoDigitsOrEquation()) {
+                            amount = newText
+                            equationResult = evaluate(amount)
+                            enableSave = equationResult > 0
+                        } else if (amount == "0.00") {
+                            enableSave = false
+                        }
+                        dummyFocusRequester.requestFocus()
+                    },
+                    onBackspaceClick = {
+                        if (amount == "0.00") return@NumberKeyboard
+                        amount = amount.safeSubstring(0, amount.length - 1)
+                        enableSave = amount.isDoubleTwoDigitsOrEquation()
+                        equationResult = evaluate(amount)
+                        enableSave = amount.isDoubleTwoDigitsOrEquation() && equationResult > 0
+                    },
+                )
+
+                SaveButton(
+                    modifier = Modifier.fillMaxWidth(),
+                    enabled = enableSave,
+                    onClick = {
+                        val expenseToSave = Expense(
+                            amount = equationResult,
+                            currency = currency,
+                            note = note,
+                            datetime = datetime.toString(),
+                            categoryId = category.id,
+                            tripId = currentTripId
+                        )
+                        onSave(
+                            if (expenseDtoToEdit == null) expenseToSave
+                            else expenseToSave.copy(id = expenseDtoToEdit.expense.id)
+                        )
+                    })
+            }
         }
     }
 
+
     if (showDateTimePicker) {
         DateTimePicker(datetime, onChange = { newDateTime ->
             datetime = newDateTime
@@ -264,12 +335,50 @@ fun String.safeSubstring(start: Int, end: Int): String {
     }
 }
 
-fun String.isDoubleTwoDigitsAboveZero(): Boolean {
-    return this.toDoubleOrNull() != null && this.matches(Regex("^\\d*(\\.\\d{0,2})?$")) && this.toDouble() > 0
+private fun evaluate(equation: String): Double {
+    if (equation.isEmpty()) return 0.0
+
+    val operatorIndex = equation.indexOfFirstIndexed { i, c ->
+        i != 0 && c in "+-*/"
+    }
+
+    if (operatorIndex == -1) return equation.toDouble()
+
+    val leftString = equation.substring(0, operatorIndex)
+    val rightString = equation.substring(operatorIndex + 1)
+
+    if (leftString.isEmpty() || rightString.isEmpty()) return 0.0
+
+    val left = leftString.toDouble()
+    val right = rightString.toDouble()
+
+    return when (equation[operatorIndex]) {
+        '+' -> left + right
+        '-' -> left - right
+        '*' -> left * right
+        '/' -> left / right
+        else -> 0.0
+    }
+}
+
+private inline fun String.indexOfFirstIndexed(predicate: (index: Int, Char) -> Boolean): Int {
+    for (i in indices) {
+        if (predicate(i, this[i])) return i
+    }
+    return -1
+}
+
+private fun String.isDoubleTwoDigitsOrEquation(): Boolean {
+    return this != "0.00" && this.matches(Regex("^(-?(0\\.?|0\\.\\d{1,2}|[1-9]\\d*(\\.\\d{0,2})?))([+\\/*-](0\\.?|0\\.\\d{1,2}|[1-9]\\d*(\\.\\d{0,2})?)?)?$"))
 }
 
 @Composable
-fun NoteInput(note: String, onTextChange: (String) -> Unit, modifier: Modifier = Modifier, focusRequester: FocusRequester) {
+fun NoteInput(
+    note: String,
+    onTextChange: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    focusRequester: FocusRequester
+) {
     var text by remember { mutableStateOf(note) }
 
     OutlinedTextField(
@@ -292,33 +401,36 @@ fun NoteInput(note: String, onTextChange: (String) -> Unit, modifier: Modifier =
 
 @Composable
 fun CurrencyButton(modifier: Modifier = Modifier, onClick: () -> Unit, text: String) {
-    OutlinedButton(onClick = onClick, modifier = modifier) {
+    Button(onClick = onClick, modifier = modifier, shape = MaterialTheme.shapes.medium) {
         Text(text)
     }
 }
 
 @Composable
 fun CategoryButton(onClick: () -> Unit, category: Category, modifier: Modifier = Modifier) {
-    OutlinedButton(
+    Button(
         onClick = onClick,
-        modifier = modifier
+        modifier = modifier,
+        shape = MaterialTheme.shapes.medium,
+        colors = ButtonDefaults.buttonColors()
+            .copy(containerColor = Color(category.color.toColorInt()), contentColor = Color.Black)
     ) {
         Icon(
             modifier = Modifier.padding(end = 10.dp),
             painter = painterResource(category.icon.resource),
             contentDescription = stringResource(R.string.category),
-            tint = Color(category.color.toColorInt())
         )
-        Text(category.name, color = Color(category.color.toColorInt()))
+        Text(category.name)
     }
 }
 
 @Composable
-fun SaveButton(enabled: Boolean, onClick: () -> Unit) {
-    OutlinedButton(
+fun SaveButton(modifier: Modifier = Modifier, enabled: Boolean, onClick: () -> Unit) {
+    Button(
         onClick = onClick,
         enabled = enabled,
-        modifier = Modifier
+        modifier = modifier,
+        shape = MaterialTheme.shapes.medium
     ) {
         Icon(
             imageVector = Icons.Filled.Check,
@@ -332,273 +444,171 @@ fun NumberKeyboard(
     modifier: Modifier = Modifier,
     onNumberClick: (String) -> Unit,
     onBackspaceClick: () -> Unit,
-    onSave: () -> Unit,
-    enableSave: Boolean
+    onOperatorClick: (String) -> Unit
 ) {
-    val buttonModifier = Modifier
-        .padding(4.dp)
-        .aspectRatio(2f)
-
     Column(
         modifier = modifier,
         verticalArrangement = Arrangement.spacedBy(4.dp)
     ) {
-        Row(
-            modifier = Modifier.fillMaxWidth(),
-            horizontalArrangement = Arrangement.spacedBy(4.dp)
-        ) {
-            TextButton(
-                onClick = { onNumberClick("1") },
-                modifier = buttonModifier.weight(1f)
+        keyboard.forEach { row ->
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(4.dp)
             ) {
-                Text("1", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("2") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("2", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("3") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("3", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("+", fontSize = 20.sp)
-            }
-        }
+                row.forEach { key ->
+                    when (key) {
+                        "backspace" -> KeyboardButton(
+                            icon = painterResource(drawable.materialsymbols_ic_arrow_left_alt_outlined),
+                            onClick = onBackspaceClick,
+                            modifier = Modifier.weight(1f),
+                            containerColor = MaterialTheme.colorScheme.primary
+                        )
 
-        Row(
-            modifier = Modifier.fillMaxWidth(),
-            horizontalArrangement = Arrangement.spacedBy(4.dp)
-        ) {
-            TextButton(
-                onClick = { onNumberClick("4") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("4", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("5") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("5", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("6") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("6", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("-", fontSize = 20.sp)
-            }
-        }
+                        "+", "/", "-", "*" -> KeyboardButton(
+                            text = key,
+                            onClick = { onOperatorClick(key) },
+                            modifier = Modifier.weight(1f),
+                            containerColor = MaterialTheme.colorScheme.secondaryContainer,
+                            contentColor = MaterialTheme.colorScheme.onSecondaryContainer
+                        )
 
-        Row(
-            modifier = Modifier.fillMaxWidth(),
-            horizontalArrangement = Arrangement.spacedBy(4.dp)
-        ) {
-            TextButton(
-                onClick = { onNumberClick("7") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("7", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("8") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("8", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("9") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("9", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("*", fontSize = 20.sp)
-            }
-        }
-
-        Row(
-            modifier = Modifier.fillMaxWidth(),
-            horizontalArrangement = Arrangement.spacedBy(4.dp)
-        ) {
-            TextButton(
-                onClick = { onNumberClick(".") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text(".", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = { onNumberClick("0") },
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Text("0", fontSize = 20.sp)
-            }
-            TextButton(
-                onClick = onBackspaceClick,
-                modifier = buttonModifier.weight(1f)
-            ) {
-                Icon(
-                    imageVector = Icons.AutoMirrored.Filled.ArrowBack,
-                    contentDescription = stringResource(R.string.backspace)
-                )
-            }
-            TextButton(
-                onClick = onSave,
-                modifier = buttonModifier.weight(1f),
-                enabled = enableSave
-            ) {
-                Icon(
-                    imageVector = Icons.Default.Check,
-                    contentDescription = stringResource(R.string.backspace)
-                )
+                        else -> KeyboardButton(
+                            text = key,
+                            onClick = { onNumberClick(key) },
+                            modifier = Modifier.weight(1f),
+                            containerColor = MaterialTheme.colorScheme.secondary,
+                            contentColor = MaterialTheme.colorScheme.onSecondary
+                        )
+                    }
+                }
             }
         }
     }
 }
 
+@Composable
+fun KeyboardButton(
+    text: String? = null,
+    icon: Painter? = null,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+    enabled: Boolean = true,
+    containerColor: Color = MaterialTheme.colorScheme.primary,
+    contentColor: Color = MaterialTheme.colorScheme.onPrimary
+) {
+    Button(
+        onClick = onClick,
+        shape = MaterialTheme.shapes.medium,
+        modifier = modifier
+            .padding(4.dp)
+            .aspectRatio(2.5f),
+        enabled = enabled,
+        colors = ButtonDefaults.buttonColors(
+            containerColor = containerColor,
+            contentColor = contentColor
+        )
+    ) {
+        when {
+            text != null -> Text(
+                text,
+                style = MaterialTheme.typography.titleMedium
+            )
 
-//@SuppressLint("CoroutineCreationDuringComposition")
-//@RequiresApi(Build.VERSION_CODES.O)
-//@OptIn(ExperimentalMaterial3Api::class)
-//@Preview
-//@Composable
-//fun PreviewLight() {
-//    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
-//    CoroutineScope(Dispatchers.IO).launch {
-//        sheetState.show()
-//    }
-//
-//    TripMoneyTheme {
-//        AddExpenseBottomSheet(
-//            {}, {}, null, sheetState,
-//            categories = listOf(
-//                Category(
-//                    name = "Hotel",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.HOTEL,
-//                    color = "#B3E5FC"
-//                ),
-//                Category(
-//                    name = "Jedzenie",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.RESTAURANT,
-//                    color = "#C8E6C9"
-//                ),
-//                Category(
-//                    name = "Transport",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.FLIGHT,
-//                    color = "#FFCDD2"
-//                ),
-//                Category(
-//                    name = "Rozrywka",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.ATTRACTION,
-//                    color = "#FFF9C4"
-//                ),
-//                Category(
-//                    name = "Zakupy",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#E1BEE7"
-//                ),
-//                Category(
-//                    name = "Zakupy1",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#D7CCC8"
-//                ),
-//                Category(
-//                    name = "Zakupy2",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#BBDEFB"
-//                ),
-//                Category(
-//                    name = "Zakupy3",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#D1C4E9"
-//                ),
-//                Category(
-//                    name = "Zakupy4",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#DCEDC8"
-//                ),
-//            )
-//        )
-//    }
-//}
-//
-//@SuppressLint("CoroutineCreationDuringComposition")
-//@RequiresApi(Build.VERSION_CODES.O)
-//@OptIn(ExperimentalMaterial3Api::class)
-//@Preview
-//@Composable
-//fun PreviewDark() {
-//    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
-//    CoroutineScope(Dispatchers.IO).launch {
-//        sheetState.show()
-//    }
-//
-//    TripMoneyTheme(darkTheme = true) {
-//        AddExpenseBottomSheet(
-//            {}, {}, null, sheetState,
-//            categories = listOf(
-//                Category(
-//                    name = "Hotel",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.HOTEL,
-//                    color = "#B3E5FC"
-//                ),
-//                Category(
-//                    name = "Jedzenie",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.RESTAURANT,
-//                    color = "#C8E6C9"
-//                ),
-//                Category(
-//                    name = "Transport",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.FLIGHT,
-//                    color = "#FFCDD2"
-//                ),
-//                Category(
-//                    name = "Rozrywka",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.ATTRACTION,
-//                    color = "#FFF9C4"
-//                ),
-//                Category(
-//                    name = "Zakupy",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#E1BEE7"
-//                ),
-//                Category(
-//                    name = "Zakupy1",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#D7CCC8"
-//                ),
-//                Category(
-//                    name = "Zakupy2",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#BBDEFB"
-//                ),
-//                Category(
-//                    name = "Zakupy3",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#D1C4E9"
-//                ),
-//                Category(
-//                    name = "Zakupy4",
-//                    icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
-//                    color = "#DCEDC8"
-//                ),
-//            )
-//        )
-//    }
-//}
+            icon != null -> Icon(painter = icon, contentDescription = null)
+        }
+    }
+}
+
+val keyboard = listOf(
+    listOf("+", "-", "*", "/"),
+    listOf("1", "2", "3"),
+    listOf("4", "5", "6"),
+    listOf("7", "8", "9"),
+    listOf(".", "0", "backspace")
+)
+
+
+@SuppressLint("CoroutineCreationDuringComposition")
+@RequiresApi(Build.VERSION_CODES.O)
+@OptIn(ExperimentalMaterial3Api::class)
+@AllPreviews
+@Composable
+fun PreviewAddExpenseDisabled() {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    CoroutineScope(Dispatchers.IO).launch {
+        sheetState.show()
+    }
+
+    TripMoneyTheme {
+        AddExpenseBottomSheet(
+            onSave = {},
+            onDismiss = {},
+            expenseDtoToEdit = null,
+            state = sheetState,
+            currentTrip = Trip(1, "Trip", "2020-01-01", Currencies.entries.random().name),
+            categories = categoriesToPreview
+        )
+    }
+
+}
+
+@SuppressLint("CoroutineCreationDuringComposition")
+@RequiresApi(Build.VERSION_CODES.O)
+@OptIn(ExperimentalMaterial3Api::class)
+@AllPreviews
+@Composable
+fun PreviewAddExpenseEnabled() {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    CoroutineScope(Dispatchers.IO).launch {
+        sheetState.show()
+    }
+
+    TripMoneyTheme {
+        AddExpenseBottomSheet(
+            onSave = {},
+            onDismiss = {},
+            expenseDtoToEdit = ExpenseDto(
+                Expense(
+                    amount = 10.31,
+                    currency = "PLN",
+                    note = "some note",
+                    datetime = "2025-11-30T10:16:26.939",
+                    categoryId = 1,
+                    tripId = 1
+                ), category = categoriesToPreview.get(0), Trip(1, "Włochy", "2025-01-02", "PLN")
+            ),
+            state = sheetState,
+            currentTrip = Trip(1, "Trip", "2020-01-01", Currencies.entries.random().name),
+            categories = categoriesToPreview
+        )
+    }
+
+}
+
+val categoriesToPreview = listOf(
+    Category(
+        name = "Hotel",
+        icon = cc.n0th1ng.tripmoney.utils.Icons.HOTEL,
+        color = colors.random()
+    ),
+    Category(
+        name = "Jedzenie",
+        icon = cc.n0th1ng.tripmoney.utils.Icons.RESTAURANT,
+        color = colors.random()
+    ),
+    Category(
+        name = "Transport",
+        icon = cc.n0th1ng.tripmoney.utils.Icons.FLIGHT,
+        color = colors.random()
+    ),
+    Category(
+        name = "Rozrywka",
+        icon = cc.n0th1ng.tripmoney.utils.Icons.ATTRACTION,
+        color = colors.random()
+    ),
+    Category(
+        name = "Zakupy",
+        icon = cc.n0th1ng.tripmoney.utils.Icons.GROCERIES,
+        color = colors.random()
+    ),
+)

app/src/main/java/cc/n0th1ng/tripmoney/screens/listexpense/ListExpenseScreen.kt

@@ -50,9 +50,7 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import androidx.core.graphics.toColorInt
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import androidx.paging.PagingData
@@ -126,7 +124,6 @@ fun ListExpenseScreen(
             sumMap.clear()
             sumMap.putAll(newSums)
         }
-
         LazyColumn(
             modifier = Modifier.fillMaxSize(),
             horizontalAlignment = Alignment.CenterHorizontally,
@@ -513,4 +510,4 @@ private fun sampleExpenseDtoWithConvertedAmountList(): List<ExpenseDtoWithConver
         )
     }
     return result
-}
+}

app/src/main/java/cc/n0th1ng/tripmoney/screens/settings/SettingsScreen.kt

@@ -1,5 +1,6 @@
 package cc.n0th1ng.tripmoney.screens.settings
 
+import android.content.Intent
 import android.os.Build
 import androidx.annotation.RequiresApi
 import androidx.annotation.StringRes
@@ -12,9 +13,12 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Card
+import androidx.compose.material3.Icon
 import androidx.compose.material3.ListItem
 import androidx.compose.material3.ListItemDefaults
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.RadioButton
+import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
@@ -27,15 +31,31 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.core.content.FileProvider
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import cc.n0th1ng.tripmoney.R.*
 import cc.n0th1ng.tripmoney.data.repository.AppTheme
 import cc.n0th1ng.tripmoney.screens.listexpense.CurrencySelectionDialog
+import cc.n0th1ng.tripmoney.theme.TripMoneyTheme
+import cc.n0th1ng.tripmoney.utils.AllPreviews
 import cc.n0th1ng.tripmoney.utils.Currencies
+import cc.n0th1ng.tripmoney.utils.Icons
+import cc.n0th1ng.tripmoney.utils.saveCsv
+import cc.n0th1ng.tripmoney.utils.shareCsv
+import cc.n0th1ng.tripmoney.viewmodel.ExpenseAndCategoryViewModel
 import cc.n0th1ng.tripmoney.viewmodel.SettingsViewModel
+import cc.n0th1ng.tripmoney.viewmodel.TripViewModel
+import com.composables.icons.materialsymbols.outlined.R
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.io.File
+import java.nio.file.Files
 
 @RequiresApi(Build.VERSION_CODES.S)
 @Composable
@@ -43,50 +63,109 @@ fun SettingsScreen() {
     val settingsViewModel: SettingsViewModel = hiltViewModel()
     val currentTheme by settingsViewModel.theme.collectAsState()
     val currentDefaultCurrency by settingsViewModel.defaultCurrency.collectAsState()
-    var showThemeDialog by remember { mutableStateOf(false) }
-    var showCurrencyDialog by remember { mutableStateOf(false) }
-    Column(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(15.dp),
-        verticalArrangement = Arrangement.spacedBy(10.dp)
-    ) {
-        Card {
-            SettingsListItem(onClick = { showThemeDialog = true }, stringResource(string.theme)) {
-                Text(
-                    if (isSystemInDarkTheme()) stringResource(string.dark_theme) else stringResource(
-                        string.light_theme
-                    )
-                )
+    val currentTripId by settingsViewModel.currentTrip.collectAsState()
+    val expenseAndCategoryViewModel: ExpenseAndCategoryViewModel = hiltViewModel()
+    val tripViewModel: TripViewModel = hiltViewModel()
+    val currentTrip = tripViewModel.getTrip(currentTripId)
+    val context = LocalContext.current
+    val tripName = currentTrip?.name ?: ""
+    val scope = rememberCoroutineScope()
+
+    SettingsScreen(
+        currentDefaultCurrency = currentDefaultCurrency,
+        currentTheme = currentTheme,
+        onThemeSave = { settingsViewModel.setTheme(it) },
+        onCurrencySave = { settingsViewModel.setDefaultCurrency(it) },
+        tripName = tripName,
+        onExportToCsv = {
+            scope.launch {
+                try {
+                    val safeTripName = tripName.replace(Regex("[^a-zA-Z0-9_]"), "_")
+                    val file = File(context.cacheDir, "$safeTripName.csv")
+                    expenseAndCategoryViewModel.generateCSVToFile(currentTripId, file)
+                    shareCsv(context, file)
+
+                } catch (e: Exception) {
+                    e.printStackTrace()
+                }
             }
         }
+    )
+}
 
-        Card {
+@RequiresApi(Build.VERSION_CODES.S)
+@Composable
+fun SettingsScreen(
+    currentDefaultCurrency: Currencies,
+    currentTheme: AppTheme,
+    onThemeSave: (AppTheme) -> Unit,
+    onCurrencySave: (Currencies) -> Unit,
+    tripName: String,
+    onExportToCsv: () -> Unit,
+) {
+
+    Scaffold { padding ->
+        var showThemeDialog by remember { mutableStateOf(false) }
+        var showCurrencyDialog by remember { mutableStateOf(false) }
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(15.dp),
+            verticalArrangement = Arrangement.spacedBy(10.dp)
+        ) {
             SettingsListItem(
                 onClick = { showCurrencyDialog = true },
-                stringResource(string.default_currency)
-            ) {
-                 Text(currentDefaultCurrency.name)
-            }
-        }
-
-        if (showThemeDialog) {
-            ThemeSelectionDialog(
-                onDismiss = { showThemeDialog = false },
-                onThemeSelected = { theme ->
-                    settingsViewModel.setTheme(theme)
-                    showThemeDialog = false
-                },
-                selected = currentTheme
+                headlineText = stringResource(string.default_currency),
+                supportingText = currentDefaultCurrency.name,
+                iconResource = R.drawable.materialsymbols_ic_currency_yen_outlined
             )
-        }
 
-        if (showCurrencyDialog) {
-            CurrencySelectionDialog(onDismiss = {showCurrencyDialog = false}, onCurrencySelected = {
-                currencyString ->
-                settingsViewModel.setDefaultCurrency(Currencies.valueOf(currencyString))
-                showCurrencyDialog = false
-            }, currentDefaultCurrency.name)
+            SettingsCard(string.theme) {
+                SettingsListItem(
+                    onClick = { showThemeDialog = true },
+                    stringResource(string.theme),
+                    supportingText = if (isSystemInDarkTheme()) stringResource(string.dark_theme) else stringResource(
+                        string.light_theme
+                    ),
+                    iconResource = R.drawable.materialsymbols_ic_format_paint_outlined
+                )
+                SettingsListItem(
+                    onClick = { },
+                    "Pallete",
+                    supportingText = if (isSystemInDarkTheme()) stringResource(string.dark_theme) else stringResource(
+                        string.light_theme
+                    ),
+                    iconResource = R.drawable.materialsymbols_ic_palette_outlined
+                )
+            }
+            SettingsListItem(
+                onClick = onExportToCsv,
+                stringResource(string.export_to_csv),
+                supportingText = "Save expenses from %s to a file".format(tripName),
+                iconResource = R.drawable.materialsymbols_ic_csv_outlined
+            )
+
+            if (showThemeDialog) {
+                ThemeSelectionDialog(
+                    onDismiss = { showThemeDialog = false },
+                    onThemeSelected = { theme ->
+                        onThemeSave(theme)
+                        showThemeDialog = false
+                    },
+                    selected = currentTheme
+                )
+            }
+
+            if (showCurrencyDialog) {
+                CurrencySelectionDialog(
+                    onDismiss = { showCurrencyDialog = false },
+                    onCurrencySelected = { currencyString ->
+                        onCurrencySave(Currencies.valueOf(currencyString))
+                        showCurrencyDialog = false
+                    },
+                    currentDefaultCurrency.name
+                )
+            }
         }
     }
 }
@@ -97,7 +176,7 @@ fun SettingsCard(@StringRes title: Int = -1, content: @Composable () -> Unit) {
         if (title != -1) {
             Text(
                 text = stringResource(title),
-                fontSize = 13.sp,
+                style = MaterialTheme.typography.titleSmall,
                 modifier = Modifier
                     .padding(start = 15.dp, top = 15.dp, end = 15.dp)
                     .alpha(0.6f)
@@ -112,16 +191,22 @@ fun SettingsListItem(
     onClick: () -> Unit,
     headlineText: String,
     trailingContent: @Composable () -> Unit = {},
-    supportingContent: @Composable () -> Unit
+    supportingText: String,
+    iconResource: Int
 ) {
-    ListItem(
-        colors = ListItemDefaults.colors(containerColor = Color.Transparent),
-        headlineContent = { Text(headlineText) },
-        supportingContent = supportingContent,
-        trailingContent = trailingContent,
-        modifier = Modifier
-            .clickable(true, onClick = onClick)
-    )
+    Card {
+        ListItem(
+            leadingContent = {
+                Icon(painter = painterResource(iconResource), contentDescription = null)
+            },
+            colors = ListItemDefaults.colors(containerColor = Color.Transparent),
+            headlineContent = { Text(headlineText) },
+            supportingContent = { Text(supportingText) },
+            trailingContent = trailingContent,
+            modifier = Modifier
+                .clickable(true, onClick = onClick)
+        )
+    }
 }
 
 @Composable
@@ -165,4 +250,35 @@ fun ThemeSelectionDialog(
         },
         confirmButton = {}
     )
+}
+
+@RequiresApi(Build.VERSION_CODES.S)
+@AllPreviews
+@Composable
+fun PreviewSettingsScreen() {
+    TripMoneyTheme {
+        SettingsScreen(Currencies.entries.random(), AppTheme.entries.random(), {}, {}, "Włochy", {})
+    }
+}
+
+@RequiresApi(Build.VERSION_CODES.S)
+@AllPreviews
+@Composable
+fun PreviewThemeSelectionDialog() {
+    TripMoneyTheme {
+        ThemeSelectionDialog(onDismiss = {}, onThemeSelected = {}, AppTheme.SYSTEM)
+    }
+}
+
+@RequiresApi(Build.VERSION_CODES.S)
+@AllPreviews
+@Composable
+fun PreviewCurrencySelectionDialog() {
+    TripMoneyTheme {
+        CurrencySelectionDialog(
+            onDismiss = {},
+            onCurrencySelected = {},
+            selected = Currencies.entries.random().name
+        )
+    }
 }

app/src/main/java/cc/n0th1ng/tripmoney/screens/statistics/StatisticsScreen.kt

@@ -7,7 +7,6 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
@@ -25,38 +24,97 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.ModifierLocalBeyondBoundsLayout
 import androidx.compose.ui.res.painterResource
-import androidx.compose.ui.text.TextStyle
-import androidx.compose.ui.text.font.FontStyle
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import androidx.core.graphics.toColorInt
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import cc.n0th1ng.tripmoney.data.dto.SummaryPerCategory
 import cc.n0th1ng.tripmoney.data.entity.Category
+import cc.n0th1ng.tripmoney.data.entity.Trip
 import cc.n0th1ng.tripmoney.theme.TripMoneyTheme
+import cc.n0th1ng.tripmoney.utils.AllPreviews
 import cc.n0th1ng.tripmoney.utils.Currencies
 import cc.n0th1ng.tripmoney.utils.Icons
 import cc.n0th1ng.tripmoney.utils.colors
 import cc.n0th1ng.tripmoney.viewmodel.ExpenseAndCategoryViewModel
 import cc.n0th1ng.tripmoney.viewmodel.SettingsViewModel
+import cc.n0th1ng.tripmoney.viewmodel.TripViewModel
+import com.composables.icons.materialsymbols.outlined.R
 
 @RequiresApi(Build.VERSION_CODES.O)
 @Composable
 fun StatisticsScreen() {
     val expenseAndCategoryViewModel: ExpenseAndCategoryViewModel = hiltViewModel()
     val settingsViewModel: SettingsViewModel = hiltViewModel()
-    val currentTrip by settingsViewModel.currentTrip.collectAsState()
-    val summaryPerCategoryList by expenseAndCategoryViewModel.getSummaryPerCategory(currentTrip)
+    val tripViewModel: TripViewModel = hiltViewModel()
+    val currentTripId by settingsViewModel.currentTrip.collectAsState()
+    val currentTrip = tripViewModel.getTrip(currentTripId)
+    val summaryPerCategoryList by expenseAndCategoryViewModel.getSummaryPerCategory(currentTripId)
         .collectAsState(emptyList())
+    val summaryAmount by expenseAndCategoryViewModel.getSummaryAmount(currentTripId)
+        .collectAsState(0.0)
+    StatisticsScreen(
+        summaryPerCategoryList,
+        summaryAmount,
+        Currencies.valueOf(currentTrip?.currency ?: Currencies.default().name)
+    )
+}
 
-    Column(modifier = Modifier.padding(10.dp)) {
+@RequiresApi(Build.VERSION_CODES.O)
+@Composable
+fun StatisticsScreen(
+    summaryPerCategoryList: List<SummaryPerCategory>,
+    summaryAmount: Double,
+    tripCurrency: Currencies
+) {
+    Column(
+        modifier = Modifier
+            .padding(10.dp)
+            .fillMaxSize(),
+        verticalArrangement = Arrangement.spacedBy(10.dp)
+    ) {
+        Summary(summaryAmount, tripCurrency.name)
         SummaryPerCategoryCard(summaryPerCategoryList)
     }
 }
 
+@Composable
+fun Summary(summaryAmount: Double, currency: String) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(15.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceBetween
+        ) {
+            Column {
+                Text(stringResource(cc.n0th1ng.tripmoney.R.string.total_expenses), style = MaterialTheme.typography.titleSmall)
+                Text(
+                    "%.2f %s".format(summaryAmount, currency),
+                    style = MaterialTheme.typography.headlineLarge
+                )
+            }
+            Row(
+                horizontalArrangement = Arrangement.Center
+            )
+            {
+                Icon(
+                    painter = painterResource(R.drawable.materialsymbols_ic_payment_arrow_down_outlined),
+                    contentDescription = null,
+                    modifier = Modifier.size(45.dp)
+                )
+
+            }
+        }
+
+    }
+}
 
 @Composable
 fun SummaryPerCategoryCard(summaryPerCategoryList: List<SummaryPerCategory>) {
@@ -65,7 +123,6 @@ fun SummaryPerCategoryCard(summaryPerCategoryList: List<SummaryPerCategory>) {
             modifier = Modifier.padding(15.dp),
             verticalArrangement = Arrangement.spacedBy(5.dp)
         ) {
-//                Text(text = "Summary", fontWeight = FontWeight.Bold, fontSize = 25.sp)
             summaryPerCategoryList.forEach {
                 CategoryCard(
                     summaryPerCategory = it, modifier = Modifier
@@ -80,21 +137,35 @@ fun SummaryPerCategoryCard(summaryPerCategoryList: List<SummaryPerCategory>) {
 fun CategoryCard(modifier: Modifier = Modifier, summaryPerCategory: SummaryPerCategory) {
     Column(modifier = modifier) {
         Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
-            Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(5.dp)) {
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(5.dp)
+            ) {
                 Icon(
                     painter = painterResource(summaryPerCategory.category.icon.resource),
                     contentDescription = null,
                     modifier = Modifier.size(MaterialTheme.typography.bodyLarge.fontSize.value.dp),
                     tint = Color(summaryPerCategory.category.color.toColorInt())
                 )
-                Text("%s".format(summaryPerCategory.category.name, (summaryPerCategory.percent * 100).toInt()),
-                    style = MaterialTheme.typography.bodyLarge, color = Color(summaryPerCategory.category.color.toColorInt()))
+                Text(
+                    "%s".format(
+                        summaryPerCategory.category.name,
+                        (summaryPerCategory.percent * 100).toInt()
+                    ),
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = Color(summaryPerCategory.category.color.toColorInt())
+                )
             }
 
-            Text("%.2f ${summaryPerCategory.currency}".format(summaryPerCategory.amount),
-                style = MaterialTheme.typography.bodyMedium)
+            Text(
+                "%.2f ${summaryPerCategory.currency}".format(summaryPerCategory.amount),
+                style = MaterialTheme.typography.bodyMedium
+            )
         }
-        Row(horizontalArrangement = Arrangement.spacedBy(5.dp), verticalAlignment = Alignment.CenterVertically){
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(5.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
             Box(
                 modifier = Modifier
                     .height(40.dp)
@@ -102,31 +173,34 @@ fun CategoryCard(modifier: Modifier = Modifier, summaryPerCategory: SummaryPerCa
                     .clip(RoundedCornerShape(16.dp))
                     .background(MaterialTheme.colorScheme.primary)
             ) {
-                Column(verticalArrangement = Arrangement.Center, modifier = Modifier.fillMaxSize().padding(11.dp)) {
-                    Text("%d%%".format((summaryPerCategory.percent * 100).toInt()),
-                        style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onPrimary)
+                Column(
+                    verticalArrangement = Arrangement.Center,
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(11.dp)
+                ) {
+                    Text(
+                        "%d%%".format((summaryPerCategory.percent * 100).toInt()),
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onPrimary
+                    )
 
                 }
             }
-//            Text("%d%%".format((summaryPerCategory.percent * 100).toInt()),
-//                style = MaterialTheme.typography.labelSmall)
         }
     }
 }
 
-@Preview
+@RequiresApi(Build.VERSION_CODES.O)
+@AllPreviews
 @Composable
-fun previewLight() {
+fun Preview() {
     TripMoneyTheme {
-        SummaryPerCategoryCard(summaryPerCategoryList)
-    }
-}
-
-@Preview
-@Composable
-fun previewDark() {
-    TripMoneyTheme(darkTheme = true) {
-        SummaryPerCategoryCard(summaryPerCategoryList)
+        StatisticsScreen(
+            summaryPerCategoryList,
+            summaryAmount = 125.24,
+            Currencies.entries.random()
+        )
     }
 }
 
@@ -143,8 +217,8 @@ val categories = listOf(
 val summaryPerCategoryList = listOf(
     SummaryPerCategory(categories[0], 50.0, 1f, Currencies.PLN),
     SummaryPerCategory(categories[1], 120.0, 0.3f, Currencies.PLN),
+    SummaryPerCategory(categories[4], 120.0, 0.3f, Currencies.PLN),
     SummaryPerCategory(categories[2], 80.0, 0.2f, Currencies.PLN),
     SummaryPerCategory(categories[3], 50.0, 0.1f, Currencies.PLN),
-    SummaryPerCategory(categories[4], 120.0, 0.3f, Currencies.PLN),
     SummaryPerCategory(categories[5], 50.0, 0.0001f, Currencies.PLN),
 )

app/src/main/java/cc/n0th1ng/tripmoney/screens/trippicker/AddTripBottomSheet.kt

@@ -1,5 +1,6 @@
 package cc.n0th1ng.tripmoney.screens.trippicker
 
+import android.annotation.SuppressLint
 import android.os.Build
 import androidx.annotation.RequiresApi
 import androidx.compose.foundation.layout.Arrangement
@@ -17,12 +18,14 @@ import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Shapes
 import androidx.compose.material3.SheetState
 import androidx.compose.material3.Text
+import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
@@ -44,9 +47,14 @@ import cc.n0th1ng.tripmoney.data.entity.Trip
 import cc.n0th1ng.tripmoney.screens.addexpense.CurrencyButton
 import cc.n0th1ng.tripmoney.screens.listexpense.CurrencySelectionDialog
 import cc.n0th1ng.tripmoney.screens.listexpense.DatePicker
+import cc.n0th1ng.tripmoney.theme.TripMoneyTheme
+import cc.n0th1ng.tripmoney.utils.AllPreviews
 import cc.n0th1ng.tripmoney.utils.Currencies
 import cc.n0th1ng.tripmoney.viewmodel.SettingsViewModel
 import io.ktor.http.hostIsIp
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import java.time.LocalDate
 import java.time.format.DateTimeFormatter
 
@@ -59,6 +67,29 @@ fun AddTripBottomSheet(
     tripToEdit: Trip?,
     sheetState: SheetState
 ) {
+    val settingsViewModel: SettingsViewModel = hiltViewModel()
+    val defaultCurrency by settingsViewModel.defaultCurrency.collectAsState()
+
+    AddTripBottomSheet(
+        onDismiss = onDismiss,
+        onSave = onSave,
+        tripToEdit = tripToEdit,
+        sheetState = sheetState,
+        defaultCurrency = defaultCurrency
+    )
+}
+
+
+@RequiresApi(Build.VERSION_CODES.O)
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun AddTripBottomSheet(
+    onDismiss: () -> Unit,
+    onSave: (Trip) -> Unit,
+    tripToEdit: Trip?,
+    sheetState: SheetState,
+    defaultCurrency: Currencies
+) {
 
     var name by remember { mutableStateOf(tripToEdit?.name ?: "") }
     var startDate by remember {
@@ -66,8 +97,7 @@ fun AddTripBottomSheet(
             LocalDate.parse(tripToEdit?.startDate ?: LocalDate.now().toString())
         )
     }
-    val settingsViewModel: SettingsViewModel = hiltViewModel()
-    val defaultCurrency by settingsViewModel.defaultCurrency.collectAsState()
+
     var showCurrencyDialog by remember { mutableStateOf(false) }
     var showDatePicker by remember { mutableStateOf(false) }
     var currency by remember { mutableStateOf(tripToEdit?.currency ?: defaultCurrency.name) }
@@ -87,7 +117,7 @@ fun AddTripBottomSheet(
                 modifier = Modifier
                     .fillMaxWidth()
                     .padding(start = 15.dp),
-                text = stringResource(if(tripToEdit == null) R.string.add_trip else R.string.edit_trip),
+                text = stringResource(if (tripToEdit == null) R.string.add_trip else R.string.edit_trip),
                 fontWeight = FontWeight.Bold,
                 fontSize = 35.sp,
                 textAlign = TextAlign.Start
@@ -101,32 +131,35 @@ fun AddTripBottomSheet(
                 modifier = Modifier.fillMaxWidth(0.9f),
                 horizontalArrangement = Arrangement.spacedBy(10.dp)
             ) {
-                CurrencyButton(
-                    modifier = Modifier
-                        .weight(1f)
-                        .fillMaxWidth(1f),
-                    onClick = { showCurrencyDialog = true }, text = currency
-                )
-                OutlinedButton(
+                Button(
                     modifier = Modifier
                         .fillMaxWidth(1f)
                         .weight(1f),
+                    shape = MaterialTheme.shapes.medium,
                     onClick = { showDatePicker = true }) {
                     Text(
                         text = startDate.format(DateTimeFormatter.ofPattern("dd.MM.yyyy")),
                         fontSize = 17.sp
                     )
                 }
+                CurrencyButton(
+                    modifier = Modifier
+                        .weight(1f)
+                        .fillMaxWidth(1f),
+                    onClick = { showCurrencyDialog = true }, text = currency
+                )
 
             }
 
             Button(
                 modifier = Modifier.fillMaxWidth(0.9f),
                 enabled = enableSave,
+                shape = MaterialTheme.shapes.medium,
                 onClick = {
-                    val trip = Trip(name = name, startDate = startDate.toString(), currency = currency)
+                    val trip =
+                        Trip(name = name, startDate = startDate.toString(), currency = currency)
 
-                    onSave(if(tripToEdit == null) trip else trip.copy(id = tripToEdit.id))
+                    onSave(if (tripToEdit == null) trip else trip.copy(id = tripToEdit.id))
                 }) {
                 Icon(
                     imageVector = Icons.Filled.Check,
@@ -166,4 +199,41 @@ fun NameInput(name: String, onTextChange: (String) -> Unit) {
             onTextChange(text)
         }, keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Text)
     )
+}
+
+
+@RequiresApi(Build.VERSION_CODES.O)
+@SuppressLint("CoroutineCreationDuringComposition")
+@OptIn(ExperimentalMaterial3Api::class)
+@AllPreviews
+@Composable
+fun PreviewAddTripBottomSheet() {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    CoroutineScope(Dispatchers.IO).launch {
+        sheetState.show()
+    }
+    TripMoneyTheme {
+        AddTripBottomSheet({}, {}, null, sheetState, defaultCurrency = Currencies.entries.random())
+    }
+}
+
+@RequiresApi(Build.VERSION_CODES.O)
+@SuppressLint("CoroutineCreationDuringComposition")
+@OptIn(ExperimentalMaterial3Api::class)
+@AllPreviews
+@Composable
+fun PreviewAddTripBottomSheetEditTrip() {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    CoroutineScope(Dispatchers.IO).launch {
+        sheetState.show()
+    }
+    TripMoneyTheme {
+        AddTripBottomSheet(
+            {},
+            {},
+            Trip(1, "Włochy", "2025-01-02", "PLN"),
+            sheetState,
+            defaultCurrency = Currencies.entries.random()
+        )
+    }
 }

app/src/main/java/cc/n0th1ng/tripmoney/utils/AllPreviews.kt

@@ -2,7 +2,18 @@ package cc.n0th1ng.tripmoney.utils
 
 import android.content.res.Configuration.UI_MODE_NIGHT_YES
 import android.content.res.Configuration.UI_MODE_TYPE_NORMAL
+import android.os.Build
+import androidx.annotation.RequiresApi
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import cc.n0th1ng.tripmoney.screens.addexpense.PreviewAddExpenseDisabled
+import cc.n0th1ng.tripmoney.screens.addexpense.PreviewAddExpenseEnabled
+import cc.n0th1ng.tripmoney.screens.settings.PreviewSettingsScreen
+import cc.n0th1ng.tripmoney.screens.settings.SettingsScreen
+import cc.n0th1ng.tripmoney.theme.TripMoneyTheme
 
 @Preview(name = "Light")
 @Preview(name = "Dark", uiMode = UI_MODE_NIGHT_YES or UI_MODE_TYPE_NORMAL)

app/src/main/java/cc/n0th1ng/tripmoney/utils/CSVUtils.kt

@@ -0,0 +1,30 @@
+package cc.n0th1ng.tripmoney.utils
+
+import android.content.Context
+import android.content.Intent
+import androidx.core.content.FileProvider
+import java.io.File
+
+fun saveCsv(context: Context, fileName: String, content: String): File {
+    val file = File(context.cacheDir, "$fileName.csv")
+    file.writeText(content)
+    return file
+}
+
+fun shareCsv(context: Context, file: File) {
+    val uri = FileProvider.getUriForFile(
+        context,
+        "${context.packageName}.provider",
+        file
+    )
+
+    val intent = Intent(Intent.ACTION_SEND).apply {
+        type = "text/csv"
+        putExtra(Intent.EXTRA_STREAM, uri)
+        addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+    }
+
+    context.startActivity(
+        Intent.createChooser(intent, "Share CSV")
+    )
+}

app/src/main/java/cc/n0th1ng/tripmoney/viewmodel/ExpenseAndCategoryViewModel.kt

@@ -18,12 +18,17 @@ import cc.n0th1ng.tripmoney.data.repository.TripRepository
 import cc.n0th1ng.tripmoney.utils.Currencies
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
+import org.apache.commons.csv.CSVFormat
+import org.apache.commons.csv.CSVPrinter
+import java.io.File
 import java.time.LocalDateTime
 import javax.inject.Inject
 
+
 @HiltViewModel
 open class ExpenseAndCategoryViewModel @Inject constructor(
     private val expenseRepo: ExpenseRepository,
@@ -55,12 +60,39 @@ open class ExpenseAndCategoryViewModel @Inject constructor(
         }
     }
 
+    @RequiresApi(Build.VERSION_CODES.O)
+    suspend fun generateCSVToFile(tripId: Int, file: File) {
+        file.writer().use { writer ->
+            CSVPrinter(
+                writer,
+                CSVFormat.DEFAULT.withHeader("date", "category", "currency", "amount")
+            ).use { printer ->
+                expenseRepo.getExpenses(tripId).first().forEach { expenseDto ->
+                    printer.printRecord(
+                        expenseDto.expense.datetime,
+                        expenseDto.category.name,
+                        expenseDto.expense.currency,
+                        expenseDto.expense.amount
+                    )
+
+                }
+            }
+        }
+    }
+
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    fun getSummaryAmount(tripId: Int): Flow<Double> {
+        return getExpensesWithConvertedAmounts(tripId).map { list ->
+            list.sumOf { it.convertedAmount }
+        }
+    }
+
     @RequiresApi(Build.VERSION_CODES.O)
     fun getSummaryPerCategory(tripId: Int): Flow<List<SummaryPerCategory>> {
         val tripCurrency = tripRepo.getTrip(tripId)?.currency ?: Currencies.default().name
         return getExpensesWithConvertedAmounts(tripId)
             .map { list ->
-                // Compute summary
                 val sumOfAll = list.sumOf { it.convertedAmount }
                 list.groupBy { it.expenseDto.category }
                     .map { (category, expenses) ->
@@ -84,7 +116,7 @@ open class ExpenseAndCategoryViewModel @Inject constructor(
                     val convertedAmount =
                         if (expenseDto.expense.currency != expenseDto.trip.currency) {
                             runBlocking {
-                                expenseDto.toExpenseDtoWithConvertedAmount()
+                                expenseDto.convertedAmount()
                             }
                         } else {
                             expenseDto.expense.amount
@@ -102,7 +134,7 @@ open class ExpenseAndCategoryViewModel @Inject constructor(
                     val convertedAmount =
                         if (expenseDto.expense.currency != expenseDto.trip.currency) {
                             runBlocking {
-                                expenseDto.toExpenseDtoWithConvertedAmount()
+                                expenseDto.convertedAmount()
                             }
                         } else {
                             expenseDto.expense.amount
@@ -120,7 +152,7 @@ open class ExpenseAndCategoryViewModel @Inject constructor(
     }
 
     @RequiresApi(Build.VERSION_CODES.O)
-    suspend fun ExpenseDto.toExpenseDtoWithConvertedAmount(): Double {
+    suspend fun ExpenseDto.convertedAmount(): Double {
         return exchangeRateRepository.getRate(
             Currencies.valueOf(this.expense.currency),
             Currencies.valueOf(this.trip.currency),

app/src/main/res/values-pl/strings.xml

@@ -21,4 +21,10 @@
     <string name="edit_trip">Edytuj wycieczkę</string>
     <string name="edit_expense">Edytuj wydatek</string>
     <string name="default_currency">Domyślna waluta</string>
+    <string name="total_expenses">Suma wydatków</string>
+    <string name="settings">Ustawienia</string>
+    <string name="pick_trip">Wybierz wycieczkę</string>
+    <string name="list_of_expenses">Lista wydatków</string>
+    <string name="statistics">Statystyki</string>
+    <string name="export_to_csv">Eksport do CSV</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -21,4 +21,10 @@
     <string name="edit_trip">Edit trip</string>
     <string name="edit_expense">Edit expense</string>
     <string name="default_currency">Default currency</string>
+    <string name="total_expenses">Total expenses</string>
+    <string name="settings">Settings</string>
+    <string name="pick_trip">Pick trip</string>
+    <string name="list_of_expenses">List of expenses</string>
+    <string name="statistics">Statistics</string>
+    <string name="export_to_csv">Export to CSV</string>
 </resources>

app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <cache-path name="cache" path="." />
+</paths>