refactor: rewrite mobile app in Compose and add error handling for wear

2026-06-11 17:32:02 +03:00
parent 59207d3351
commit 19a571ac06
40 changed files with 1003 additions and 608 deletions
@@ -1,28 +1,33 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <application
        android:allowBackup="true"
-        android:dataExtractionRules="@xml/data_extraction_rules"
-        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
-        android:theme="@style/Base.Theme.OmniCards">
-        <activity
-            android:name=".ShowCardActivity"
-            android:screenOrientation="portrait"
-            android:exported="false" />
+        android:theme="@style/Theme.OmniCards">
        <activity
            android:name=".EditCardActivity"
-            android:screenOrientation="portrait"
-            android:exported="false" />
+            android:exported="false"
+            android:label="@string/title_activity_edit_card"
+            android:theme="@style/Theme.OmniCards" />
+        <activity
+            android:name=".AddCardActivity"
+            android:exported="false"
+            android:label="@string/title_activity_add_card"
+            android:theme="@style/Theme.OmniCards" />
+        <activity
+            android:name=".ShowCardActivity"
+            android:exported="false"
+            android:label="@string/title_activity_show_card"
+            android:theme="@style/Theme.OmniCards" />
        <activity
            android:name=".MainActivity"
-            android:screenOrientation="portrait"
-            android:exported="true">
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.OmniCards">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

@@ -14,4 +14,4 @@ class CardInfo (
    val name: String,
    val codeType: BarcodeFormat,
    val codeValue: String,
-)
+)
@@ -1,124 +1,249 @@
 package ru.omni_devel.cards

-import android.content.Intent
+import android.app.Activity
 import android.os.Bundle
-import android.widget.ArrayAdapter
-import android.widget.Button
-import android.widget.EditText
-import android.widget.Spinner
-import android.widget.TextView
 import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.Button
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.setValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
 import com.google.zxing.BarcodeFormat
 import com.journeyapps.barcodescanner.ScanContract
 import com.journeyapps.barcodescanner.ScanOptions
+import ru.omni_devel.cards.ui.theme.OmniCardsTheme

-class EditCardActivity : AppCompatActivity() {
+class EditCardActivity : ComponentActivity() {
    private lateinit var db: DbHelper

-    private val barcodeLauncher = registerForActivityResult(ScanContract()) { result ->
-        if (result.contents != null) {
-            setCodeType(result.formatName)
-
-            findViewById<EditText>(R.id.cardValueInput).setText(result.contents)
-        }
-    }
-
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
-        setContentView(R.layout.activity_edit_card)
-        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
-            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
-            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
-            insets
-        }
-
-        val actionName = intent.getStringExtra("action") ?: EditCardAction.ADD.name
-        val action = EditCardAction.valueOf(actionName)

        db = DbHelper(this, null)

-        val actionLabel: TextView = findViewById(R.id.editCardActionLabel)
-        val cardNameInput: EditText = findViewById(R.id.cardNameInput)
-        val cardValueInput: EditText = findViewById(R.id.cardValueInput)
-        val scanCodeButton: Button = findViewById(R.id.scanCodeButton)
-        val cardCodeTypeSelector: Spinner = findViewById(R.id.cardCodeTypeSelector)
-        val saveCardButton: Button = findViewById(R.id.saveCardButton)
+        val cardId = intent.getIntExtra("cardId", -1)
+        val cardInfo = db.getCard(cardId)

-        val options = BarcodeFormat.entries.map { it.name }
-        val adapter = ArrayAdapter(this, android.R.layout.simple_spinner_item, options)
-        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
-        cardCodeTypeSelector.adapter = adapter
-
-        scanCodeButton.setOnClickListener {
-            val options = ScanOptions()
-            options.setPrompt("Scan code")
-            options.setBeepEnabled(false)
-            options.setOrientationLocked(false)
-            barcodeLauncher.launch(options)
-        }
-
-        saveCardButton.setOnClickListener {
-            val cardName = cardNameInput.text.toString()
-            val cardValue = cardValueInput.text.toString()
-            val cardCodeType = BarcodeFormat.valueOf(cardCodeTypeSelector.selectedItem.toString())
-
-            when (action) {
-                EditCardAction.ADD -> {
-                    db.addCard(cardName, cardValue, cardCodeType)
-
-                    finish()
-                }
-                EditCardAction.EDIT -> {
-                    val cardId = intent.getIntExtra("cardId", -1)
-
-                    db.editCard(cardId, cardName, cardValue, cardCodeType)
-
-                    val intent = Intent(this, ShowCardActivity::class.java)
-
-                    intent.putExtra("cardId", cardId)
-
-                    startActivity(intent)
-                    finish()
+        setContent {
+            OmniCardsTheme {
+                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                    EditCardPage(cardInfo, innerPadding, getDbFun = {
+                        return@EditCardPage db
+                    })
                }
            }
        }
+    }
+}

-        when (action) {
-            EditCardAction.ADD -> {
-                setCodeType("QR_CODE")
+@Composable
+fun CardEditable(
+    cardName: String,
+    onCardNameChange: (String) -> Unit,
+    codeValue: String,
+    oncodeValueChange: (String) -> Unit,
+    codeType: BarcodeFormat,
+    onCodeTypeChange: (BarcodeFormat) -> Unit
+) {
+    var isCodeTypeDropdownExpanded by remember { mutableStateOf(false) }

-                actionLabel.text = "Adding card"
-            }
-            EditCardAction.EDIT -> {
-                val cardId = intent.getIntExtra("cardId", -1)
+    val fieldModifier = Modifier.fillMaxWidth()

-                val cardInfo = db.getCard(cardId)
+    val scanLauncher = rememberLauncherForActivityResult(
+        contract = ScanContract()
+    ) { result ->
+        if (result.contents != null) {
+            oncodeValueChange(result.contents)

-                if (cardInfo == null) {
-                    Toast.makeText(this, "cardInfo is null", Toast.LENGTH_LONG).show()
-                    return
-                }
-
-                actionLabel.text = "Editing card"
-
-                cardNameInput.setText(cardInfo.name)
-                cardValueInput.setText(cardInfo.codeValue)
-                setCodeType(cardInfo.codeType.name)
+            result.formatName?.let { formatName ->
+                try {
+                    onCodeTypeChange(BarcodeFormat.valueOf(formatName))
+                } catch (e: IllegalArgumentException) {}
            }
        }
    }

-    private fun setCodeType(codeTypeString: String) {
-        val codeTypes = BarcodeFormat.entries.map { it.name }
-        val codeTypeIndex = codeTypes.indexOf(codeTypeString)
-
-        if (codeTypeIndex >= 0) {
-            findViewById<Spinner>(R.id.cardCodeTypeSelector).setSelection(codeTypeIndex)
+    OutlinedTextField(
+        value = cardName,
+        onValueChange = onCardNameChange,
+        modifier = fieldModifier,
+        label = { Text("Name") }
+    )
+    Row(
+        horizontalArrangement = Arrangement.spacedBy(8.dp)
+    ) {
+        OutlinedTextField(
+            value = codeValue,
+            onValueChange = oncodeValueChange,
+            modifier = Modifier.weight(1f),
+            label = { Text("Value") }
+        )
+        Button(
+            modifier = Modifier.align(Alignment.CenterVertically),
+            onClick = {
+                scanLauncher.launch(
+                    ScanOptions().apply {
+                        setPrompt("Scan your card")
+                        setBeepEnabled(true)
+                        setOrientationLocked(false)
+                    }
+                )
+            }
+        ) {
+            Text("Scan")
        }
    }
-}
+
+    Box(
+        modifier = fieldModifier,
+    ) {
+        OutlinedTextField(
+            value = codeType.name,
+            onValueChange = {},
+            modifier = fieldModifier,
+            label = { Text("Code type") },
+            readOnly = true,
+        )
+        Box(
+            modifier = fieldModifier
+                .matchParentSize()
+                .clickable { isCodeTypeDropdownExpanded = !isCodeTypeDropdownExpanded }
+        )
+        DropdownMenu(
+            expanded = isCodeTypeDropdownExpanded,
+            onDismissRequest = {
+                isCodeTypeDropdownExpanded = false
+            },
+            modifier = fieldModifier
+        ) {
+            BarcodeFormat.entries.forEach { format ->
+                DropdownMenuItem(
+                    text = { Text(format.name) },
+                    onClick = {
+                        onCodeTypeChange(format)
+                        isCodeTypeDropdownExpanded = false
+                    }
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun AddCard(innerPadding: PaddingValues, getDbFun: () -> DbHelper) {
+    var cardName by remember { mutableStateOf("") }
+    var codeValue by remember { mutableStateOf("") }
+    var codeType by remember { mutableStateOf(BarcodeFormat.QR_CODE) }
+
+    val context = LocalContext.current as Activity
+
+    Page(
+        "New card",
+        innerPadding
+    ) {
+        Column(
+            verticalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            CardEditable(
+                cardName = cardName,
+                onCardNameChange = { cardName = it },
+                codeValue = codeValue,
+                oncodeValueChange = { codeValue = it },
+                codeType = codeType,
+                onCodeTypeChange = { codeType = it }
+            )
+
+            Button(
+                modifier = Modifier.fillMaxWidth(),
+                onClick = {
+                    val err = checkCardData(cardName, codeValue)
+
+                    if (err == null) {
+                        getDbFun().addCard(cardName, codeValue, codeType)
+                        context.finish()
+                    } else {
+                        Toast.makeText(context, err, Toast.LENGTH_SHORT)
+                    }
+                }
+            ) {
+                Text("Save")
+            }
+        }
+    }
+}
+
+@Composable
+fun EditCard(cardInfo: CardInfo, innerPadding: PaddingValues, getDbFun: () -> DbHelper) {
+    var cardName by remember { mutableStateOf(cardInfo.name) }
+    var codeValue by remember { mutableStateOf(cardInfo.codeValue) }
+    var codeType by remember { mutableStateOf(cardInfo.codeType) }
+
+    val context = LocalContext.current as Activity
+
+    Page(
+        "Editing card id${cardInfo.id}",
+        innerPadding
+    ) {
+        Column(
+            verticalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            CardEditable(
+                cardName = cardName,
+                onCardNameChange = { cardName = it },
+                codeValue = codeValue,
+                oncodeValueChange = { codeValue = it },
+                codeType = codeType,
+                onCodeTypeChange = { codeType = it }
+            )
+
+            Button(
+                modifier = Modifier.fillMaxWidth(),
+                onClick = {
+                    val err = checkCardData(cardName, codeValue)
+
+                    if (err == null) {
+                        getDbFun().editCard(cardInfo.id, cardName, codeValue, codeType)
+                        context.finish()
+                    } else {
+                        Toast.makeText(context, err, Toast.LENGTH_SHORT)
+                    }
+                }
+            ) {
+                Text("Save")
+            }
+        }
+    }
+}
+
+@Composable
+fun EditCardPage(cardInfo: CardInfo?, innerPadding: PaddingValues, getDbFun: () -> DbHelper) {
+    if (cardInfo == null) {
+        AddCard(innerPadding, getDbFun)
+    } else {
+        EditCard(cardInfo, innerPadding, getDbFun)
+    }
+}
@@ -0,0 +1,132 @@
+package ru.omni_devel.cards
+
+import android.content.Intent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.combinedClickable
+import androidx.compose.foundation.gestures.detectTapGestures
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+@Composable
+fun Page(name: String, innerPadding: PaddingValues, content: @Composable () -> Unit) {
+    Column(
+        modifier = Modifier.padding(innerPadding)
+    ) {
+        TopBar(name)
+
+        Column(
+            modifier = Modifier.padding(horizontal = 16.dp)
+        ) {
+            content()
+        }
+    }
+}
+
+@Composable
+fun TopBar(text: String) {
+    Row(
+        modifier = Modifier.fillMaxWidth().background(MaterialTheme.colorScheme.primaryContainer).padding(horizontal = 12.dp, vertical = 16.dp)
+    ) {
+        Text(
+            text,
+            fontSize = 24.sp,
+            color = MaterialTheme.colorScheme.onPrimaryContainer
+        )
+    }
+}
+
+@Composable
+fun CardButton(cardInfo: CardInfo, onDeleteCard: (Int) -> Unit, getDbFun: () -> DbHelper) {
+    val context = LocalContext.current
+    var menuExpanded by remember { mutableStateOf(false) }
+
+    Box(modifier = Modifier.fillMaxWidth()) {
+        Surface(
+            modifier = Modifier
+                .fillMaxWidth()
+                .pointerInput(Unit) {
+                    detectTapGestures(
+                        onTap = {
+                            val intent = Intent(context, ShowCardActivity::class.java)
+                            intent.putExtra("cardId", cardInfo.id)
+                            context.startActivity(intent)
+                        },
+                        onLongPress = {
+                            menuExpanded = true
+                        }
+                    )
+                },
+            shape = ButtonDefaults.shape,
+            color = MaterialTheme.colorScheme.primaryContainer,
+            tonalElevation = 2.dp
+        ) {
+            Text(
+                cardInfo.name,
+                fontSize = 16.sp,
+                color = MaterialTheme.colorScheme.onPrimaryContainer,
+                modifier = Modifier
+                    .padding(vertical = 16.dp, horizontal = 16.dp)
+                    .fillMaxWidth(),
+                textAlign = TextAlign.Start
+            )
+        }
+
+        DropdownMenu(
+            expanded = menuExpanded,
+            onDismissRequest = { menuExpanded = false }
+        ) {
+            DropdownMenuItem(
+                text = { Text("Edit") },
+                onClick = {
+                    menuExpanded = false
+
+                    val intent = Intent(context, EditCardActivity::class.java)
+
+                    intent.putExtra("cardId", cardInfo.id)
+
+                    context.startActivity(intent)
+                }
+            )
+            DropdownMenuItem(
+                text = { Text("Delete") },
+                onClick = {
+                    menuExpanded = false
+
+                    onDeleteCard(cardInfo.id)
+                }
+            )
+        }
+    }
+}
+
+@Composable
+fun FullWidthButton(onClick: () -> Unit, content: @Composable () -> Unit) {
+    Button(
+        modifier = Modifier.fillMaxWidth(),
+        onClick = onClick
+    ) {
+        content()
+    }
+}
@@ -2,55 +2,64 @@ package ru.omni_devel.cards

 import android.content.Intent
 import android.os.Bundle
-import android.view.View
-import android.widget.Button
-import android.widget.LinearLayout
-import android.widget.PopupMenu
-import android.widget.TextView
 import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
-import com.google.android.material.button.MaterialButton
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalUriHandler
 import kotlinx.serialization.json.Json
+import ru.omni_devel.cards.ui.theme.OmniCardsTheme

-class MainActivity : AppCompatActivity() {
-    private lateinit var cardsList: LinearLayout
+class MainActivity : ComponentActivity() {
    private lateinit var db: DbHelper

+    private val cards = mutableStateListOf<CardInfo>()
+
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
-        setContentView(R.layout.activity_main)
-        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
-            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
-            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
-            insets
-        }

        db = DbHelper(this, null)
-        cardsList = findViewById(R.id.cardsList)

-        val addCardButton: Button = findViewById(R.id.addCardButton)
-        val syncWithWearOSButton: Button = findViewById(R.id.syncWithWearOSButton)
-
-        addCardButton.setOnClickListener {
-            val intent = Intent(this, EditCardActivity::class.java)
-
-            intent.putExtra("action", EditCardAction.ADD.name)
-
-            startActivity(intent)
-        }
-
-        syncWithWearOSButton.setOnClickListener {
-            Toast.makeText(this, "Sync in progress...", Toast.LENGTH_SHORT).show()
-
-            sendToWatch(this, "/updateCards", Json.encodeToString(db.getCards())) { isSuccess ->
-                if (isSuccess) {
-                    Toast.makeText(this, "Successfully synced!", Toast.LENGTH_SHORT).show()
-                } else {
-                    Toast.makeText(this, "Sync failed! Please, check your connection", Toast.LENGTH_LONG).show()
+        setContent {
+            OmniCardsTheme {
+                Scaffold(
+                    modifier = Modifier.fillMaxSize()
+                ) { innerPadding ->
+                    MainPage(innerPadding, cards, onDeleteCard = { cardId ->
+                        db.removeCard(cardId)
+                        cards.removeIf { it.id == cardId }
+                    }, getDbFun = {
+                        return@MainPage db
+                    })
                }
            }
        }
@@ -58,84 +67,102 @@ class MainActivity : AppCompatActivity() {

    override fun onResume() {
        super.onResume()
-        renderCards()
+
+        cards.clear()
+        cards.addAll(db.getCards())
    }
+}

-    private fun renderCards() {
-        val cards = db.getCards()
+@Composable
+fun MainPage(
+    innerPadding: PaddingValues,
+    cards: List<CardInfo>,
+    onDeleteCard: (Int) -> Unit,
+    getDbFun: () -> DbHelper
+) {
+    val context = LocalContext.current
+    val uriHandler = LocalUriHandler.current

-        cardsList.removeAllViews()
+    var isActionBarShowed by remember { mutableStateOf(false) }

-        if (cards.isEmpty()) {
-            val text = TextView(this)
-
-            val params = LinearLayout.LayoutParams(
-                LinearLayout.LayoutParams.MATCH_PARENT,
-                LinearLayout.LayoutParams.WRAP_CONTENT
-            )
-
-            text.text = "Add a card to get started"
-            text.layoutParams = params
-            text.textAlignment = View.TEXT_ALIGNMENT_CENTER
-
-            cardsList.addView(text)
-        } else {
-            for (card in cards) {
-                val button = MaterialButton(this)
-
-                val params = LinearLayout.LayoutParams(
-                    LinearLayout.LayoutParams.MATCH_PARENT,
-                    LinearLayout.LayoutParams.WRAP_CONTENT
-                )
-                params.setMargins(16, 4, 16, 4)
-
-                button.text = card.name
-                button.layoutParams = params
-                button.cornerRadius = (12 * resources.displayMetrics.density).toInt()
-
-                button.setOnClickListener {
-                    val intent = Intent(this, ShowCardActivity::class.java)
-
-                    intent.putExtra("cardId", card.id)
-
-                    startActivity(intent)
-                }
-
-                button.setOnLongClickListener { view ->
-                    val popup = PopupMenu(this, view)
-
-                    popup.menu.add("Edit")
-                    popup.menu.add("Remove")
-
-                    popup.setOnMenuItemClickListener { menuItem ->
-                        when (menuItem.title) {
-                            "Edit" -> {
-                                val intent = Intent(this, EditCardActivity::class.java)
-
-                                intent.putExtra("action", EditCardAction.EDIT.name)
-                                intent.putExtra("cardId", card.id)
-
-                                startActivity(intent)
-
-                                true
-                            }
-                            "Remove" -> {
-                                db.removeCard(card.id)
-                                renderCards()
-
-                                true
-                            }
-                            else -> false
-                        }
+    Box(
+        modifier = Modifier.fillMaxSize()
+    ) {
+        Page(
+            "OmniCards",
+            innerPadding
+        ) {
+            Column(
+                modifier = Modifier.verticalScroll(rememberScrollState()).padding(bottom = 64.dp).background(Color.Transparent).padding(top = 16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp)
+            ) {
+                if (cards.isEmpty()) {
+                    Text("Add new card to get started")
+                } else {
+                    for (card in cards) {
+                        CardButton(card, onDeleteCard, getDbFun)
                    }
-
-                    popup.show()
-
-                    true
                }
+            }
+        }

-                cardsList.addView(button)
+        if (isActionBarShowed) {
+            Column(
+                modifier = Modifier.align(Alignment.BottomEnd).padding(16.dp).background(MaterialTheme.colorScheme.inversePrimary,
+                    RoundedCornerShape(24.dp)).padding(16.dp).fillMaxWidth()
+            ) {
+                FullWidthButton(
+                    onClick = {
+                        isActionBarShowed = false
+
+                        val intent = Intent(context, EditCardActivity::class.java)
+
+                        context.startActivity(intent)
+                    }
+                ) {
+                    Text("Add card")
+                }
+                FullWidthButton(
+                    onClick = {
+                        Toast.makeText(context, "Sync in progress...", Toast.LENGTH_SHORT).show()
+
+                        sendToWatch(context, "/updateCards", Json.encodeToString(getDbFun().getCards())) { isSuccess ->
+                            if (isSuccess) {
+                                Toast.makeText(context, "Successfully synced!", Toast.LENGTH_SHORT).show()
+                            } else {
+                                Toast.makeText(context, "Sync failed! Please, check your connection", Toast.LENGTH_LONG).show()
+                            }
+                        }
+
+                        isActionBarShowed = false
+                    }
+                ) {
+                    Text("Sync with WearOS")
+                }
+                FullWidthButton(
+                    onClick = {
+                        uriHandler.openUri("https://omni-devel.ru")
+                    }
+                ) {
+                    Text("About author")
+                }
+                FullWidthButton(
+                    onClick = {
+                        isActionBarShowed = false
+                    }
+                ) {
+                    Text(">")
+                }
+            }
+        } else {
+            Button(
+                modifier = Modifier.align(Alignment.BottomEnd).padding(32.dp),
+                onClick = {
+                    isActionBarShowed = true
+                }
+            ) {
+                Text("<")
            }
        }
    }
-}
+}
@@ -2,35 +2,61 @@ package ru.omni_devel.cards

 import android.os.Bundle
 import android.view.WindowManager
-import android.widget.ImageView
-import android.widget.TextView
 import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.text.style.TextAlign
+import ru.omni_devel.cards.ui.theme.OmniCardsTheme

-class ShowCardActivity : AppCompatActivity() {
+class ShowCardActivity : ComponentActivity() {
    private lateinit var db: DbHelper

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
-        setContentView(R.layout.activity_show_card)
-        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
-            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
-            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
-            insets
-        }

        db = DbHelper(this, null)
+
+        val cardId = intent.getIntExtra("cardId", -1)
+
+        val cardInfo = db.getCard(cardId)
+
+        if (cardInfo == null) {
+            Toast.makeText(this, "Card is not exists", Toast.LENGTH_LONG).show()
+            finish()
+
+            return
+        }
+
+        setContent {
+            OmniCardsTheme {
+                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                    ShowCardPage(innerPadding, cardInfo)
+                }
+            }
+        }
    }

    override fun onResume() {
        super.onResume()

-        setBrightness(1.0f)
-        renderCard()
+        setBrightness(1f)
    }

    override fun onPause() {
@@ -39,31 +65,46 @@ class ShowCardActivity : AppCompatActivity() {
        setBrightness(WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE)
    }

-    private fun renderCard() {
-        val cardId = intent.getIntExtra("cardId", 0)
-
-        val cardInfo = db.getCard(cardId)
-
-        if (cardInfo == null) {
-            Toast.makeText(this, "cardInfo is null", Toast.LENGTH_LONG).show()
-            return
-        }
-
-        val cardCodeView: ImageView = findViewById(R.id.cardCodeView)
-        val cardNameElement: TextView = findViewById(R.id.editCardActionLabel)
-
-        cardNameElement.text = cardInfo.name
-
-        val code = generateCode(cardInfo.codeValue, cardInfo.codeType)
-
-        cardCodeView.setImageBitmap(code)
-    }
-
    private fun setBrightness(level: Float) {
-        val params = window.attributes
-
-        params.screenBrightness = level
-
-        window.attributes = params
+        window.attributes.screenBrightness = level
    }
-}
+}
+
+@Composable
+fun ShowCardPage(innerPadding: PaddingValues, cardInfo: CardInfo) {
+    val bitmap = remember(cardInfo) {
+        try {
+            generateCode(cardInfo.codeValue, cardInfo.codeType).asImageBitmap()
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    Page(cardInfo.name, innerPadding) {
+        Column(
+            modifier = Modifier.fillMaxSize(),
+            verticalArrangement = Arrangement.Center
+        ) {
+            if (bitmap != null) {
+                Image(
+                    bitmap = bitmap,
+                    contentDescription = cardInfo.codeValue,
+                    modifier = Modifier.fillMaxWidth(),
+                    contentScale = ContentScale.FillWidth
+                )
+                Text(
+                    cardInfo.codeValue,
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center
+                )
+            } else {
+                Text(
+                    "Failed to generate code. Check card data",
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center,
+                    color = MaterialTheme.colorScheme.error
+                )
+            }
+        }
+    }
+}
@@ -2,7 +2,6 @@ package ru.omni_devel.cards

 import android.content.Context
 import android.graphics.Bitmap
-import android.widget.Toast
 import com.google.android.gms.wearable.Wearable
 import com.google.zxing.BarcodeFormat
 import com.google.zxing.MultiFormatWriter
@@ -10,16 +9,14 @@ import com.journeyapps.barcodescanner.BarcodeEncoder

 fun generateCode(value: String, format: BarcodeFormat): Bitmap {
    val writer = MultiFormatWriter()
-    val matrix = writer.encode(value, format, 600, 300)
+    val matrix = writer.encode(value, format, 800, 400)

    return BarcodeEncoder().createBitmap(matrix)
 }

-fun sendToWatch(context: Context, path: String, message: String, onResult: (Boolean) -> Unit): Boolean {
+fun sendToWatch(context: Context, path: String, message: String, onResult: (Boolean) -> Unit) {
    val nodeClient = Wearable.getNodeClient(context)

-    var isSuccess = false
-
    nodeClient.connectedNodes.addOnSuccessListener { nodes ->
        if (nodes.isEmpty()) {
            onResult(false)
@@ -35,7 +32,7 @@ fun sendToWatch(context: Context, path: String, message: String, onResult: (Bool
                node.id,
                path,
                message.toByteArray(Charsets.UTF_8)
-            ).addOnCompleteListener { task ->
+            ).addOnCompleteListener(context.mainExecutor) { task ->
                completedCount++

                if (task.isSuccessful) {
@@ -45,11 +42,19 @@ fun sendToWatch(context: Context, path: String, message: String, onResult: (Bool
                if (completedCount == nodes.size) {
                    onResult(isAnySuccess)
                }
-            }.addOnFailureListener {
+            }.addOnFailureListener(context.mainExecutor) {
                onResult(false)
            }
        }
    }
+}

-    return isSuccess
+fun checkCardData(name: String, value: String): String? {
+    if (name.trim().isEmpty()) {
+        return "Name should not be empty"
+    } else if (value.trim().isEmpty()) {
+        return "Code value should not be empty"
+    }
+
+    return null
 }
@@ -0,0 +1,11 @@
+package ru.omni_devel.cards.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)
@@ -0,0 +1,58 @@
+package ru.omni_devel.cards.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun OmniCardsTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}
@@ -0,0 +1,34 @@
+package ru.omni_devel.cards.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)
@@ -1,87 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/main"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".EditCardActivity">
-
-    <androidx.appcompat.widget.Toolbar
-        android:id="@+id/toolbar2"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:background="?attr/colorPrimary"
-        android:minHeight="?attr/actionBarSize"
-        android:theme="?attr/actionBarTheme"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/editCardActionLabel"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="16dp"
-        android:text="Action"
-        android:textColor="@color/text_primary"
-        android:textSize="24sp"
-        app:layout_constraintBottom_toBottomOf="@+id/toolbar2"
-        app:layout_constraintStart_toStartOf="@+id/toolbar2"
-        app:layout_constraintTop_toTopOf="@+id/toolbar2" />
-
-    <LinearLayout
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginEnd="8dp"
-        android:orientation="vertical"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/toolbar2"
-        app:layout_constraintVertical_bias="0.0">
-
-        <EditText
-            android:id="@+id/cardNameInput"
-            android:layout_width="match_parent"
-            android:layout_height="46dp"
-            android:ems="10"
-            android:hint="Card name"
-            android:inputType="text" />
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
-
-            <EditText
-                android:id="@+id/cardValueInput"
-                android:layout_width="259dp"
-                android:layout_height="46dp"
-                android:ems="10"
-                android:hint="Card value"
-                android:inputType="text" />
-
-            <Button
-                android:id="@+id/scanCodeButton"
-                android:layout_width="match_parent"
-                android:layout_height="38dp"
-                android:text="Scan" />
-
-        </LinearLayout>
-
-        <Spinner
-            android:id="@+id/cardCodeTypeSelector"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content" />
-
-        <Button
-            android:id="@+id/saveCardButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="Save" />
-
-    </LinearLayout>
-
-</androidx.constraintlayout.widget.ConstraintLayout>
@@ -1,73 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/main"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".MainActivity">
-
-    <androidx.appcompat.widget.Toolbar
-        android:id="@+id/toolbar"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:background="?attr/colorPrimary"
-        android:minHeight="?attr/actionBarSize"
-        android:theme="?attr/actionBarTheme"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="16dp"
-        android:text="OmniCards"
-        android:textColor="@color/text_primary"
-        android:textSize="24sp"
-        app:layout_constraintBottom_toBottomOf="@+id/toolbar"
-        app:layout_constraintStart_toStartOf="@+id/toolbar"
-        app:layout_constraintTop_toTopOf="@+id/toolbar" />
-
-    <ScrollView
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        android:layout_marginTop="8dp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/toolbar">
-
-        <LinearLayout
-            android:id="@+id/cardsList"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:orientation="vertical" />
-    </ScrollView>
-
-    <Button
-        android:id="@+id/addCardButton"
-        android:layout_width="64dp"
-        android:layout_height="64dp"
-        android:layout_marginEnd="16dp"
-        android:layout_marginBottom="16dp"
-        android:text="+"
-        android:textSize="24sp"
-        app:cornerRadius="12dp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent" />
-
-    <Button
-        android:id="@+id/syncWithWearOSButton"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="16dp"
-        android:backgroundTint="#0E000000"
-        android:text="Sync with WearOS"
-        app:cornerRadius="12dp"
-        app:layout_constraintBottom_toBottomOf="@+id/toolbar"
-        app:layout_constraintEnd_toEndOf="@+id/toolbar"
-        app:layout_constraintTop_toTopOf="@+id/toolbar" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>
@@ -1,43 +1,36 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
-    tools:context=".EditCardActivity">
+    android:fitsSystemWindows="true"
+    tools:context=".ShowCardActivity">

-    <androidx.appcompat.widget.Toolbar
-        android:id="@+id/toolbar2"
-        android:layout_width="0dp"
+    <com.google.android.material.appbar.AppBarLayout
        android:layout_height="wrap_content"
-        android:background="?attr/colorPrimary"
-        android:minHeight="?attr/actionBarSize"
-        android:theme="?attr/actionBarTheme"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/editCardActionLabel"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="16dp"
-        android:text="Card name"
-        android:textColor="@color/text_primary"
-        android:textSize="24sp"
-        app:layout_constraintBottom_toBottomOf="@+id/toolbar2"
-        app:layout_constraintStart_toStartOf="@+id/toolbar2"
-        app:layout_constraintTop_toTopOf="@+id/toolbar2" />
-
-    <ImageView
-        android:id="@+id/cardCodeView"
        android:layout_width="match_parent"
-        android:layout_height="300dp"
-        android:scaleType="fitCenter"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/toolbar2" />
+        android:fitsSystemWindows="true"
+        >

-</androidx.constraintlayout.widget.ConstraintLayout>
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/toolbar"
+            android:layout_width = "match_parent"
+            android:layout_height = "?attr/actionBarSize" />
+
+  </com.google.android.material.appbar.AppBarLayout>
+
+  <include layout="@layout/content_show_card"/>
+
+  <com.google.android.material.floatingactionbutton.FloatingActionButton
+  android:id="@+id/fab"
+  android:layout_width="wrap_content"
+  android:layout_height="wrap_content"
+  android:layout_gravity="bottom|end"
+  android:layout_marginEnd="@dimen/fab_margin"
+  android:layout_marginBottom="16dp"
+  app:srcCompat="@android:drawable/ic_dialog_email" />
+
+  </androidx.coordinatorlayout.widget.CoordinatorLayout>
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/nav_host_fragment_content_show_card"
+        android:name="androidx.navigation.fragment.NavHostFragment"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:defaultNavHost="true"
+        app:navGraph="@navigation/nav_graph" />
+</androidx.constraintlayout.widget.ConstraintLayout>
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.core.widget.NestedScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FirstFragment">
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:padding="16dp">
+    <Button
+        android:id="@+id/button_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/next"
+        app:layout_constraintBottom_toTopOf="@id/textview_first"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textview_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/lorem_ipsum"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/button_first" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.core.widget.NestedScrollView>
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.core.widget.NestedScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".SecondFragment">
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:padding="16dp">
+    <Button
+        android:id="@+id/button_second"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/previous"
+        app:layout_constraintBottom_toTopOf="@id/textview_second"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textview_second"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/lorem_ipsum"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/button_second" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.core.widget.NestedScrollView>
@@ -1,18 +1,4 @@
-<!--
-  ~ Copyright (C) 2026 The Android Open Source Project
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~      http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
+<?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@color/ic_launcher_background"/>
    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
@@ -1,18 +1,4 @@
-<!--
-  ~ Copyright (C) 2026 The Android Open Source Project
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~      http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
+<?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@color/ic_launcher_background"/>
    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/nav_graph"
+    app:startDestination="@id/FirstFragment">
+
+    <fragment
+        android:id="@+id/FirstFragment"
+        android:name="ru.omni_devel.cards.FirstFragment"
+        android:label="@string/first_fragment_label"
+        tools:layout="@layout/fragment_first" >
+
+        <action
+            android:id="@+id/action_FirstFragment_to_SecondFragment"
+            app:destination="@id/SecondFragment" />
+    </fragment>
+    <fragment
+        android:id="@+id/SecondFragment"
+        android:name="ru.omni_devel.cards.SecondFragment"
+        android:label="@string/second_fragment_label"
+        tools:layout="@layout/fragment_second" >
+
+        <action
+            android:id="@+id/action_SecondFragment_to_FirstFragment"
+            app:destination="@id/FirstFragment" />
+    </fragment>
+</navigation>
@@ -0,0 +1,3 @@
+<resources>
+      <dimen name="fab_margin">48dp</dimen>
+   </resources>
@@ -0,0 +1,7 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+  <!-- Base application theme. -->
+  <style name="Base.Theme.OmniCards" parent="Theme.Material3.DayNight.NoActionBar">
+    <!-- Customize your dark theme here. -->
+    <!-- <item name="colorPrimary">@color/my_dark_primary</item> -->
+  </style>
+</resources>
@@ -0,0 +1,8 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+  <style name="Theme.OmniCards" parent="Base.Theme.OmniCards">
+    <!-- Transparent system bars for edge-to-edge. -->
+    <item name="android:navigationBarColor">@android:color/transparent</item>
+    <item name="android:statusBarColor">@android:color/transparent</item>
+    <item name="android:windowLightStatusBar">?attr/isLightTheme</item>
+  </style>
+</resources>
@@ -0,0 +1,3 @@
+<resources>
+      <dimen name="fab_margin">200dp</dimen>
+   </resources>
@@ -0,0 +1,3 @@
+<resources>
+      <dimen name="fab_margin">48dp</dimen>
+   </resources>
@@ -1,33 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <!-- Backgrounds -->
-    <color name="bg_app">#0B0E17</color>
-    <color name="bg_surface">#0E1118</color>
-    <color name="bg_card">#131726</color>
-    <color name="bg_elevated">#1A2235</color>
-    <color name="bg_hover">#212B42</color>
-
-    <!-- Accent (indigo) -->
-    <color name="accent_subtle">#152045</color>
-    <color name="accent_primary">#2952C8</color>
-    <color name="accent_hover">#3D6AE8</color>
-    <color name="accent_light">#6B90FF</color>
-
-    <!-- Text -->
-    <color name="text_primary">#DCE3F5</color>
-    <color name="text_secondary">#8A9BBC</color>
-    <color name="text_hint">#4E5E80</color>
-
-    <!-- Borders -->
-    <color name="border_subtle">#1C2030</color>
-    <color name="border_default">#1C2A42</color>
-    <color name="border_active">#2A3D60</color>
-
-    <!-- Semantic -->
-    <color name="success_bg">#0F3320</color>
-    <color name="success">#2ECC71</color>
-    <color name="error_bg">#3D1515</color>
-    <color name="error">#E05555</color>
-    <color name="warning_bg">#3D2E00</color>
-    <color name="warning">#F0A500</color>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
 </resources>
@@ -0,0 +1,3 @@
+<resources>
+      <dimen name="fab_margin">16dp</dimen>
+   </resources>
@@ -1,3 +1,48 @@
 <resources>
    <string name="app_name">OmniCards</string>
+    <!-- Strings used for fragments for navigation -->
+    <string name="first_fragment_label">First Fragment</string>
+    <string name="second_fragment_label">Second Fragment</string>
+    <string name="next">Next</string>
+    <string name="previous">Previous</string>
+
+    <string name="lorem_ipsum">
+        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam in scelerisque sem. Mauris
+        volutpat, dolor id interdum ullamcorper, risus dolor egestas lectus, sit amet mattis purus
+        dui nec risus. Maecenas non sodales nisi, vel dictum dolor. Class aptent taciti sociosqu ad
+        litora torquent per conubia nostra, per inceptos himenaeos. Suspendisse blandit eleifend
+        diam, vel rutrum tellus vulputate quis. Aliquam eget libero aliquet, imperdiet nisl a,
+        ornare ex. Sed rhoncus est ut libero porta lobortis. Fusce in dictum tellus.\n\n
+        Suspendisse interdum ornare ante. Aliquam nec cursus lorem. Morbi id magna felis. Vivamus
+        egestas, est a condimentum egestas, turpis nisl iaculis ipsum, in dictum tellus dolor sed
+        neque. Morbi tellus erat, dapibus ut sem a, iaculis tincidunt dui. Interdum et malesuada
+        fames ac ante ipsum primis in faucibus. Curabitur et eros porttitor, ultricies urna vitae,
+        molestie nibh. Phasellus at commodo eros, non aliquet metus. Sed maximus nisl nec dolor
+        bibendum, vel congue leo egestas.\n\n
+        Sed interdum tortor nibh, in sagittis risus mollis quis. Curabitur mi odio, condimentum sit
+        amet auctor at, mollis non turpis. Nullam pretium libero vestibulum, finibus orci vel,
+        molestie quam. Fusce blandit tincidunt nulla, quis sollicitudin libero facilisis et. Integer
+        interdum nunc ligula, et fermentum metus hendrerit id. Vestibulum lectus felis, dictum at
+        lacinia sit amet, tristique id quam. Cras eu consequat dui. Suspendisse sodales nunc ligula,
+        in lobortis sem porta sed. Integer id ultrices magna, in luctus elit. Sed a pellentesque
+        est.\n\n
+        Aenean nunc velit, lacinia sed dolor sed, ultrices viverra nulla. Etiam a venenatis nibh.
+        Morbi laoreet, tortor sed facilisis varius, nibh orci rhoncus nulla, id elementum leo dui
+        non lorem. Nam mollis ipsum quis auctor varius. Quisque elementum eu libero sed commodo. In
+        eros nisl, imperdiet vel imperdiet et, scelerisque a mauris. Pellentesque varius ex nunc,
+        quis imperdiet eros placerat ac. Duis finibus orci et est auctor tincidunt. Sed non viverra
+        ipsum. Nunc quis augue egestas, cursus lorem at, molestie sem. Morbi a consectetur ipsum, a
+        placerat diam. Etiam vulputate dignissim convallis. Integer faucibus mauris sit amet finibus
+        convallis.\n\n
+        Phasellus in aliquet mi. Pellentesque habitant morbi tristique senectus et netus et
+        malesuada fames ac turpis egestas. In volutpat arcu ut felis sagittis, in finibus massa
+        gravida. Pellentesque id tellus orci. Integer dictum, lorem sed efficitur ullamcorper,
+        libero justo consectetur ipsum, in mollis nisl ex sed nisl. Donec maximus ullamcorper
+        sodales. Praesent bibendum rhoncus tellus nec feugiat. In a ornare nulla. Donec rhoncus
+        libero vel nunc consequat, quis tincidunt nisl eleifend. Cras bibendum enim a justo luctus
+        vestibulum. Fusce dictum libero quis erat maximus, vitae volutpat diam dignissim.
+    </string>
+    <string name="title_activity_show_card">ShowCardActivity</string>
+    <string name="title_activity_add_card">AddCardActivity</string>
+    <string name="title_activity_edit_card">EditCardActivity</string>
 </resources>
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <style name="CardButton" parent="Widget.Material3.Button">
-        <item name="android:layout_width">match_parent</item>
-        <item name="android:layout_height">64dp</item>
-        <item name="android:textAllCaps">false</item>
-        <item name="android:textSize">16sp</item>
-        <item name="cornerRadius">8dp</item>
-    </style>
-</resources>
@@ -1,29 +1,10 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.OmniCards" parent="android:Theme.Material.Light.NoActionBar" />
+    <!-- Base application theme. -->
    <style name="Base.Theme.OmniCards" parent="Theme.Material3.DayNight.NoActionBar">
-        <item name="colorPrimary">@color/accent_primary</item>
-        <item name="colorOnPrimary">@color/text_primary</item>
-        <item name="colorPrimaryContainer">@color/accent_subtle</item>
-        <item name="colorOnPrimaryContainer">@color/accent_light</item>
-
-        <item name="colorSurface">@color/bg_card</item>
-        <item name="colorOnSurface">@color/text_primary</item>
-        <item name="colorSurfaceVariant">@color/bg_elevated</item>
-        <item name="colorOnSurfaceVariant">@color/text_secondary</item>
-
-        <item name="colorOutline">@color/border_default</item>
-        <item name="colorOutlineVariant">@color/border_subtle</item>
-
-        <item name="colorError">@color/error</item>
-        <item name="colorOnError">@color/text_primary</item>
-        <item name="colorErrorContainer">@color/error_bg</item>
-
-        <item name="android:windowBackground">@color/bg_app</item>
-        <item name="android:textColorPrimary">@color/text_primary</item>
-        <item name="android:textColorSecondary">@color/text_secondary</item>
-        <item name="android:textColorHint">@color/text_hint</item>
-        <item name="android:colorBackground">@color/bg_app</item>
-
-        <item name="android:statusBarColor">@color/bg_app</item>
-        <item name="android:navigationBarColor">@color/bg_app</item>
+        <!-- Customize your light theme here. -->
+        <!-- <item name="colorPrimary">@color/my_light_primary</item> -->
    </style>
 </resources>
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-   Sample backup rules file; uncomment and customize as necessary.
-   See https://developer.android.com/guide/topics/data/autobackup
-   for details.
-   Note: This file is ignored for devices older than API 31
-   See https://developer.android.com/about/versions/12/backup-restore
-->
-<full-backup-content>
-    <!--
-   <include domain="sharedpref" path="."/>
-   <exclude domain="sharedpref" path="device.xml"/>
-->
-</full-backup-content>
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-   Sample data extraction rules file; uncomment and customize as necessary.
-   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
-   for details.
-->
-<data-extraction-rules>
-    <cloud-backup>
-        <!-- TODO: Use <include> and <exclude> to control what is backed up.
-        <include .../>
-        <exclude .../>
-        -->
-    </cloud-backup>
-    <!--
-    <device-transfer>
-        <include .../>
-        <exclude .../>
-    </device-transfer>
-    -->
-</data-extraction-rules>