app/build.gradle.kts

@@ -80,8 +80,4 @@ dependencies {
     ksp("androidx.room:room-compiler:$room_version")
     implementation("androidx.room:room-ktx:$room_version")
     implementation("androidx.room:room-paging:$room_version")
-
-    //Paging
-    implementation ("androidx.paging:paging-compose:3.2.1")
-    implementation ("androidx.paging:paging-runtime:3.2.1")
 }

app/src/main/AndroidManifest.xml

@@ -3,7 +3,6 @@
     xmlns:tools="http://schemas.android.com/tools">
 
     <application
-        android:name=".MobileApp"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"

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

@@ -48,7 +48,6 @@ import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import com.example.myapplication.database.MobileAppDataBase
-import com.example.myapplication.database.entities.User
 import com.example.myapplication.screens.Authorization
 import com.example.myapplication.screens.EditCardScreen
 import com.example.myapplication.screens.EditUserScreen
@@ -110,25 +109,3 @@ fun AppNavigation(navController: NavHostController){
         }
     }
 }
-
-class GlobalUser private constructor() {
-    private var user: User? = null
-
-    fun setUser(user: User?) {
-        this.user = user
-    }
-
-    fun getUser(): User? {
-        return user
-    }
-
-    companion object {
-        private var instance: GlobalUser? = null
-
-        fun getInstance(): GlobalUser {
-            return instance ?: synchronized(this) {
-                instance ?: GlobalUser().also { instance = it }
-            }
-        }
-    }
-}

app/src/main/java/com/example/myapplication/MobileApp.kt

@@ -1,12 +0,0 @@
-package com.example.myapplication
-
-import android.app.Application
-
-class MobileApp: Application() {
-    lateinit var container: MobileAppContainer
-
-    override fun onCreate() {
-        super.onCreate()
-        container = MobileAppDataContainer(this)
-    }
-}

app/src/main/java/com/example/myapplication/MobileAppContainer.kt

@@ -1,27 +0,0 @@
-package com.example.myapplication
-
-import android.content.Context
-import com.example.myapplication.database.MobileAppDataBase
-import com.example.myapplication.database.repositories.CardRepository
-import com.example.myapplication.database.repositories.OfflineCardRepository
-import com.example.myapplication.database.repositories.OfflineUserRepository
-import com.example.myapplication.database.repositories.UserRepository
-
-interface MobileAppContainer {
-    val cardRepository: CardRepository
-    val userRepository: UserRepository
-}
-
-class MobileAppDataContainer(private val context: Context): MobileAppContainer {
-    override val cardRepository: CardRepository by lazy {
-        OfflineCardRepository(MobileAppDataBase.getInstance(context).cardDao())
-    }
-
-    override val userRepository: UserRepository by lazy {
-        OfflineUserRepository(MobileAppDataBase.getInstance(context).userDao())
-    }
-
-    companion object{
-        const val TIMEOUT = 5000L
-    }
-}

app/src/main/java/com/example/myapplication/components/InputContent.kt

@@ -15,7 +15,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 
@@ -68,52 +67,3 @@ fun ActiveButton(label: String, backgroundColor: Color, textColor: Color, onClic
         )
     }
 }
-
-
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun PlaceholderInputFieldAuth(label: String, startValue: String? = null, isSingleLine: Boolean, onTextChanged: (String) -> Unit){
-    var text = remember { mutableStateOf("") }
-    startValue?.let{
-        text.value = startValue
-    }
-    OutlinedTextField(
-        value = text.value,
-        onValueChange = {
-            text.value = it
-            onTextChanged(it)
-        },
-        placeholder = {
-            Text(label)
-        },
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(top = 8.dp, start = 16.dp, bottom = 8.dp, end = 16.dp),
-        shape = RoundedCornerShape(10.dp),
-        singleLine = isSingleLine
-    )
-}
-
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun PasswordInputField(label: String, startValue: String? = null, onPasswordChanged: (String) -> Unit){
-    var text = remember { mutableStateOf("") }
-    startValue?.let{
-        text.value = startValue
-    }
-
-    OutlinedTextField(
-        value = text.value,
-        onValueChange = {
-            text.value = it
-            onPasswordChanged(it)
-        },
-        placeholder = {
-            Text(label)
-        },
-        visualTransformation = PasswordVisualTransformation(),
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(top = 8.dp, start = 16.dp, bottom = 8.dp, end = 16.dp),
-        shape = RoundedCornerShape(10.dp))
-}

app/src/main/java/com/example/myapplication/database/MobileDatabase.kt

@@ -53,8 +53,8 @@ abstract class MobileAppDataBase : RoomDatabase() {
         private suspend fun initialDataBase(appContext: Context) {
             INSTANCE?.let { database ->
                 val userDao = database.userDao()
-                userDao.insert(User(id = 1, login = "Margen", password = "1234",))
-                userDao.insert(User(id = 2, login = "Leonel Messi", password = "4321",))
+                userDao.insert(User(id = 1, login = "Иван", password = "1234",))
+                userDao.insert(User(id = 2, login = "Леонель Месси", password = "4321",))
 
                 val cardDao = database.cardDao()
                 cardDao.insert(

app/src/main/java/com/example/myapplication/database/dao/CardDao.kt

@@ -1,6 +1,5 @@
 package com.example.myapplication.database.dao
 
-import androidx.paging.PagingSource
 import androidx.room.Dao
 import androidx.room.Delete
 import androidx.room.Insert
@@ -13,13 +12,13 @@ import kotlinx.coroutines.flow.Flow
 @Dao
 interface CardDao {
     @Query("select * from cards")
-    fun getAll(): PagingSource<Int, Card>
+    fun getAll(): Flow<List<Card>>
 
     @Query("select * from cards where cards.id = :id")
-    fun getById(id: Int): Flow<Card?>
+    fun getById(id: Int): Card?
 
     @Query("select * from cards where cards.user_id = :userId")
-    fun getByUserId(userId: Int): PagingSource<Int, Card>
+    fun getByUserId(userId: Int): Flow<List<Card>>
 
     @Insert(onConflict = OnConflictStrategy.IGNORE)
     suspend fun insert(card: Card)

app/src/main/java/com/example/myapplication/database/dao/UserDao.kt

@@ -19,10 +19,7 @@ interface UserDao {
     fun getAll(): Flow<List<User>>
 
     @Query("select * from users where users.id = :id")
-    fun getById(id: Int): Flow<User?>
-
-    @Query("select * from users where users.login = :login")
-    suspend fun getByLogin(login: String): User?
+    fun getById(id: Int): User?
 
     @Insert(onConflict = OnConflictStrategy.IGNORE)
     suspend fun insert(user: User)
@@ -32,8 +29,4 @@ interface UserDao {
 
     @Delete
     suspend fun delete(user: User)
-
-    @Query("SELECT * FROM users WHERE login = :login AND password = :password")
-    fun getUserByLoginAndPassword(login: String, password: String): User?
-
 }

app/src/main/java/com/example/myapplication/database/repositories/CardRepository.kt

@@ -1,19 +0,0 @@
-package com.example.myapplication.database.repositories
-
-import androidx.paging.PagingData
-import com.example.myapplication.database.entities.Card
-import kotlinx.coroutines.flow.Flow
-
-interface CardRepository {
-    fun getAllCards(): Flow<PagingData<Card>>
-
-    fun getCardsByUserId(userId: Int): Flow<PagingData<Card>>
-
-    fun getCardById(id: Int):  Flow<Card?>
-
-    suspend fun insertCard(card: Card)
-
-    suspend fun updateCard(card: Card)
-
-    suspend fun deleteCard(card: Card)
-}

app/src/main/java/com/example/myapplication/database/repositories/OfflineCardRepository.kt

@@ -1,49 +0,0 @@
-package com.example.myapplication.database.repositories
-
-import androidx.paging.Pager
-import androidx.paging.PagingConfig
-import androidx.paging.PagingData
-import com.example.myapplication.database.dao.CardDao
-import com.example.myapplication.database.entities.Card
-import kotlinx.coroutines.flow.Flow
-
-class OfflineCardRepository(private val cardDao: CardDao): CardRepository {
-    override fun getAllCards(): Flow<PagingData<Card>> {
-        return Pager(
-            config = PagingConfig(
-                pageSize = 5,
-                prefetchDistance = 1,
-                enablePlaceholders = true,
-                initialLoadSize = 10,
-                maxSize = 15
-            ),
-            pagingSourceFactory = {
-                cardDao.getAll()
-            }
-        ).flow
-    }
-
-    override fun getCardsByUserId(UserId: Int):Flow<PagingData<Card>> {
-        return Pager(
-            config = PagingConfig(
-                pageSize = 5,
-                prefetchDistance = 1,
-                enablePlaceholders = true,
-                initialLoadSize = 10,
-                maxSize = 15
-            ),
-            pagingSourceFactory = {
-                cardDao.getByUserId(UserId)
-            }
-        ).flow
-    }
-
-    override fun getCardById(id: Int): Flow<Card?> = cardDao.getById(id)
-
-    override suspend fun insertCard(card: Card) = cardDao.insert(card)
-
-    override suspend fun updateCard(card: Card) = cardDao.update(card)
-
-    override suspend fun deleteCard(card: Card) = cardDao.delete(card)
-
-}

app/src/main/java/com/example/myapplication/database/repositories/OfflineUserRepository.kt

@@ -1,21 +0,0 @@
-package com.example.myapplication.database.repositories
-
-import com.example.myapplication.database.dao.UserDao
-import com.example.myapplication.database.entities.User
-import kotlinx.coroutines.flow.Flow
-
-class OfflineUserRepository(private val userDao: UserDao): UserRepository {
-    override fun getAllUsers(): Flow<List<User>> = userDao.getAll()
-
-    override suspend fun getUserById(id: Int): Flow<User?> = userDao.getById(id)
-
-    override suspend fun getUserByLogin(login: String): User? = userDao.getByLogin(login)
-
-    override suspend fun insertUser(user: User) = userDao.insert(user)
-
-    override suspend fun updateUser(user: User) = userDao.update(user)
-
-    override suspend fun deleteUser(user: User) = userDao.delete(user)
-
-    override suspend fun getUserByLoginAndPassword(login: String, password: String): User? = userDao.getUserByLoginAndPassword(login, password)
-}

app/src/main/java/com/example/myapplication/database/repositories/UserRepository.kt

@@ -1,21 +0,0 @@
-package com.example.myapplication.database.repositories
-
-import androidx.room.Query
-import com.example.myapplication.database.entities.User
-import kotlinx.coroutines.flow.Flow
-
-interface UserRepository {
-    fun getAllUsers(): Flow<List<User>>
-
-    suspend fun getUserById(id: Int):  Flow<User?>
-
-    suspend fun getUserByLogin(login: String): User?
-
-    suspend fun insertUser(user: User)
-
-    suspend fun updateUser(user: User)
-
-    suspend fun deleteUser(user: User)
-
-    suspend fun getUserByLoginAndPassword(login: String, password: String): User?
-}

app/src/main/java/com/example/myapplication/database/viewmodels/CardViewModel.kt

@@ -1,25 +0,0 @@
-package com.example.myapplication.database.viewmodels
-
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import androidx.paging.PagingData
-import androidx.paging.cachedIn
-import com.example.myapplication.database.dao.CardDao
-import com.example.myapplication.database.entities.Card
-import com.example.myapplication.database.repositories.CardRepository
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.launch
-
-class CardViewModel(private val cardRepository : CardRepository):ViewModel() {
-    val getAllCards: Flow<PagingData<Card>> = cardRepository.getAllCards().cachedIn(viewModelScope)
-
-    fun getCardById(id: Int): Flow<Card?> = cardRepository.getCardById(id)
-
-    fun getCardByUserId(userId: Int): Flow<PagingData<Card>> = cardRepository.getCardsByUserId(userId).cachedIn(viewModelScope)
-
-    fun insertCard(card: Card) = viewModelScope.launch { cardRepository.insertCard(card) }
-
-    fun updateCard(card: Card) = viewModelScope.launch { cardRepository.updateCard(card) }
-
-    fun deleteCard(card: Card) = viewModelScope.launch { cardRepository.deleteCard(card) }
-}

app/src/main/java/com/example/myapplication/database/viewmodels/MobileAppViewModelProvider.kt

@@ -1,21 +0,0 @@
-package com.example.myapplication.database.viewmodels
-
-import androidx.lifecycle.ViewModelProvider
-import androidx.lifecycle.viewmodel.CreationExtras
-import androidx.lifecycle.viewmodel.initializer
-import androidx.lifecycle.viewmodel.viewModelFactory
-import com.example.myapplication.MobileApp
-
-object MobileAppViewModelProvider {
-    val Factory = viewModelFactory {
-        initializer {
-            CardViewModel(app().container.cardRepository)
-        }
-        initializer {
-            UserViewModel(app().container.userRepository)
-        }
-    }
-}
-
-fun CreationExtras.app(): MobileApp =
-    (this[ViewModelProvider.AndroidViewModelFactory.APPLICATION_KEY] as MobileApp)

app/src/main/java/com/example/myapplication/database/viewmodels/UserViewModel.kt

@@ -1,53 +0,0 @@
-package com.example.myapplication.database.viewmodels
-
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import com.example.myapplication.GlobalUser
-import com.example.myapplication.database.entities.User
-import com.example.myapplication.database.repositories.UserRepository
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.runBlocking
-
-class UserViewModel(private val userRepository: UserRepository): ViewModel() {
-    val getAllUsers = userRepository.getAllUsers()
-
-    suspend fun getUser(id: Int): Flow<User?> = userRepository.getUserById(id)
-
-    fun updateUser(user: User) = viewModelScope.launch {
-        userRepository.updateUser(user)
-    }
-
-    fun deleteUser(user: User) = viewModelScope.launch {
-        userRepository.deleteUser(user)
-    }
-
-    suspend fun getUserByLogin(login: String): User? = userRepository.getUserByLogin(login)
-
-    fun regUser(user: User) = viewModelScope.launch {
-        val globalUser = userRepository.getUserByLogin(user.login)
-        globalUser?.let {
-            return@launch
-        } ?: run {
-            if(user.password.isEmpty()){
-                return@launch
-            }
-
-            userRepository.insertUser(user)
-            GlobalUser.getInstance().setUser(userRepository.getUserByLogin(user.login))
-        }
-    }
-
-    fun authUser(user: User) = viewModelScope.launch {
-        val globalUser = userRepository.getUserByLogin(user.login)
-        if (user.password.isNotEmpty() && user.password == globalUser?.password){
-            GlobalUser.getInstance().setUser(globalUser)
-            val user123 = GlobalUser.getInstance().getUser()
-            println(user123)
-        }
-    }
-
-    private fun isValidEmail(email: String): Boolean {
-        return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()
-    }
-}

app/src/main/java/com/example/myapplication/screens/authorization.kt

@@ -14,9 +14,7 @@ import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.mutableStateListOf
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -27,33 +25,32 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import androidx.navigation.NavHostController
 import com.example.myapplication.R
-import com.example.myapplication.components.ActiveButton
 import com.example.myapplication.components.LoginField
 import com.example.myapplication.components.PasswordField
-import com.example.myapplication.components.PasswordInputField
-import com.example.myapplication.components.PlaceholderInputField
-import com.example.myapplication.components.PlaceholderInputFieldAuth
 import com.example.myapplication.components.navButton
 import com.example.myapplication.database.MobileAppDataBase
 import com.example.myapplication.database.entities.Card
 import com.example.myapplication.database.entities.User
-import com.example.myapplication.database.viewmodels.MobileAppViewModelProvider
-import com.example.myapplication.database.viewmodels.UserViewModel
-import com.example.myapplication.ui.theme.SkyBlue
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 
 @Composable
-fun Authorization(navController: NavHostController,
-                  userViewModel: UserViewModel = viewModel( factory = MobileAppViewModelProvider.Factory )){
+fun Authorization(navController: NavHostController){
     val context = LocalContext.current
-    val users = userViewModel.getAllUsers.collectAsState(emptyList()).value
-    val login = remember { mutableStateOf("") }
-    val password = remember { mutableStateOf("") }
+    val users = remember { mutableStateListOf<User>() }
+
+    LaunchedEffect(Unit) {
+        withContext(Dispatchers.IO) {
+            val database = MobileAppDataBase.getInstance(context)
+            database.userDao().getAll().collect { data ->
+                users.clear()
+                data.forEach { users.add(it) }
+            }
+        }
+    }
 
     Column (
         modifier = Modifier
@@ -76,26 +73,11 @@ fun Authorization(navController: NavHostController,
                 fontSize = 20.sp
             )
         }
-        PlaceholderInputFieldAuth(label = "Логин", isSingleLine = true, onTextChanged = { newlogin ->
-            login.value = newlogin
-        })
-        PasswordInputField(label = "Пароль", onPasswordChanged = { newpassword ->
-            password.value = newpassword
-        })
-
-        ActiveButton(label = "Вход", backgroundColor = SkyBlue,
-            textColor = Color.Black, onClickAction = {
-                if (login.value.isNotEmpty() && password.value.isNotEmpty()) {
-                    userViewModel.authUser(
-                        User(
-                            login = login.value,
-                            password = password.value,
-                        )
-                    )
-                    navController.navigate("mainScreen")
-                }
-            })
+        LoginField(text = "Логин")
+        PasswordField(text = "Пароль")
+        navButton(navController = navController, destination = "mainScreen", label = "Вход",
+            backgroundColor = Color.Cyan, textColor = Color.Black)
         navButton(navController = navController, destination = "registration", label = "Регистрация",
-            backgroundColor = SkyBlue, textColor = Color.Black)
+            backgroundColor = Color.Cyan, textColor = Color.Black)
     }
 }

app/src/main/java/com/example/myapplication/screens/editcard.kt

@@ -35,10 +35,8 @@ import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import androidx.navigation.NavHostController
-import com.example.myapplication.GlobalUser
 import com.example.myapplication.R
 import com.example.myapplication.components.ActiveButton
 import com.example.myapplication.components.LoginField
@@ -47,19 +45,12 @@ import com.example.myapplication.components.navBar
 import com.example.myapplication.components.navButton
 import com.example.myapplication.database.MobileAppDataBase
 import com.example.myapplication.database.entities.Card
-import com.example.myapplication.database.entities.User
-import com.example.myapplication.database.viewmodels.CardViewModel
-import com.example.myapplication.database.viewmodels.MobileAppViewModelProvider
-import com.example.myapplication.database.viewmodels.UserViewModel
 import com.example.myapplication.ui.theme.SkyBlue
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import kotlin.math.log
 
 @Composable
-fun EditCardScreen(navController: NavHostController,
-                   cardViewModel: CardViewModel = viewModel( factory = MobileAppViewModelProvider.Factory),
-                   cardId: Int? = null) {
+fun EditCardScreen(navController: NavHostController, cardId: Int? = null) {
     val context = LocalContext.current
 
     val image = remember { mutableStateOf<Bitmap>(BitmapFactory.decodeResource(context.resources, R.drawable.ferrari_laferrari_car2)) }
@@ -85,26 +76,52 @@ fun EditCardScreen(navController: NavHostController,
         }
     }
 
-    LaunchedEffect(Unit) {
-        cardId?.let {
-            cardViewModel.getCardById(cardId).collect {
-                if (it != null) {
-                    image.value = it.image
-                }
-                if (it != null) {
-                    name.value = it.name
-                }
-                if (it != null) {
-                    location.value = it.location
-                }
-                if (it != null) {
-                    mileage.value = it.mileage
-                }
-                if (it != null) {
-                    price.value = it.price
+    cardId?.let{
+        LaunchedEffect(Unit) {
+            withContext(Dispatchers.IO) {
+                val card = MobileAppDataBase.getInstance(context).cardDao().getById(cardId!!)
+                image.value = card!!.image
+                name.value = card!!.name
+                location.value = card!!.location
+                price.value = card!!.price
+                mileage.value = card!!.mileage
+            }
+        }
+    }
+
+    val edit = remember { mutableStateOf(false) }
+    if (edit.value){
+        LaunchedEffect(Unit) {
+            withContext(Dispatchers.IO) {
+                cardId?.let {
+                    MobileAppDataBase.getInstance(context).cardDao()
+                        .update(
+                            Card(
+                                id = cardId,
+                                name = name.value,
+                                location = location.value,
+                                price = price.value,
+                                mileage = mileage.value,
+                                image = image.value,
+                                userId = 1)
+                        )
+
+                } ?: run {
+                    MobileAppDataBase.getInstance(context).cardDao()
+                        .insert(
+                            Card(
+                                name = name.value,
+                                location = location.value,
+                                price = price.value,
+                                mileage = mileage.value,
+                                image = image.value,
+                                userId = 1)
+                        )
                 }
             }
         }
+        edit.value = !edit.value
+        navController.navigate("mainScreen")
     }
 
     Column(
@@ -143,52 +160,34 @@ fun EditCardScreen(navController: NavHostController,
                 price.value = newPrice.toIntOrNull() ?: 10000
             })
         ActiveButton(label = "Сохранить", backgroundColor = SkyBlue, textColor = Color.Black, onClickAction = {
-            cardId?.let {
-                cardViewModel.updateCard(
-                    Card(
-                        id = cardId,
-                        image = image.value,
-                        name = name.value,
-                        location = location.value,
-                        mileage = mileage.value,
-                        price = price.value,
-                        userId = GlobalUser.getInstance().getUser()?.id ?: 1
-                    )
-                )
-            } ?: run {
-                cardViewModel.insertCard(
-                    Card(
-                        image = image.value,
-                        name = name.value,
-                        location = location.value,
-                        mileage = mileage.value,
-                        price = price.value,
-                        userId = GlobalUser.getInstance().getUser()?.id ?: 1
-                    )
-                )
-            }
-            navController.navigate("mainScreen")
+            edit.value = !edit.value
         })
         navButton(navController = navController, destination = "mainScreen", label = "Назад", backgroundColor = SkyBlue, textColor = Color.Black)
     }
 }
 
 @Composable
-fun EditUserScreen(navController: NavHostController,
-                   userViewModel: UserViewModel = viewModel(
-                       factory = MobileAppViewModelProvider.Factory)){
+fun EditUserScreen(navController: NavHostController){
     val context = LocalContext.current
 
-    var userId = remember { mutableStateOf(0) }
-    val login = remember { mutableStateOf("") }
+    val photo = remember { mutableStateOf<Bitmap>(BitmapFactory.decodeResource(context.resources, R.drawable.login)) }
+    val name = remember { mutableStateOf("") }
     val password = remember { mutableStateOf("") }
 
+    val imageData = remember { mutableStateOf<Uri?>(null) }
+    val launcher =
+        rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) {uri: Uri? ->
+            imageData.value = uri
+        }
+    imageData.value?.let {
+        if (Build.VERSION.SDK_INT < 28) {
+            photo.value = MediaStore.Images
+                .Media.getBitmap(context.contentResolver, imageData.value)
 
-    LaunchedEffect(Unit) {
-        GlobalUser.getInstance().getUser()?.let { user ->
-            userId.value = user!!.id!!
-            login.value = user!!.login
-            password.value = user!!.password
+        } else {
+            val source = ImageDecoder
+                .createSource(context.contentResolver, imageData.value!!)
+            photo.value = ImageDecoder.decodeBitmap(source)
         }
     }
 
@@ -198,23 +197,27 @@ fun EditUserScreen(navController: NavHostController,
             .padding(bottom = 8.dp),
         verticalArrangement = Arrangement.Bottom
     ) {
-        PlaceholderInputField(label = "Логин", isSingleLine = true,
-            startValue = login.value, onTextChanged = { newName ->
-                login.value = newName
+        Image(
+            bitmap = photo.value.asImageBitmap(),
+            contentDescription = "editplaceholder",
+            contentScale = ContentScale.Crop,
+            modifier = Modifier
+                .size(384.dp)
+                .padding(8.dp)
+                .align(Alignment.CenterHorizontally))
+        ActiveButton(label = "Выбрать фото", backgroundColor = SkyBlue, textColor = Color.Black, onClickAction = {
+            launcher.launch("image/*")
+        })
+        PlaceholderInputField(label = "Никнейм", isSingleLine = true,
+            startValue = name.value, onTextChanged = { newName ->
+                name.value = newName
             })
         PlaceholderInputField(label = "Пароль", isSingleLine = true,
             startValue = password.value, onTextChanged = { newPassword ->
                 password.value = newPassword
             })
         ActiveButton(label = "Сохранить", backgroundColor = SkyBlue, textColor = Color.Black, onClickAction = {
-            userViewModel.updateUser(
-                User(
-                    id = userId.value,
-                    login = login.value,
-                    password = password.value,
-                )
-            )
-            navController.navigate("userSettings")
+            //edit.value = !edit.value
         })
     }
 }

app/src/main/java/com/example/myapplication/screens/mainScreen.kt

@@ -37,8 +37,6 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.requiredHeight
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.lazy.grid.GridCells
-import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.AlertDialog
@@ -51,25 +49,27 @@ import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.sp
-import androidx.lifecycle.viewmodel.compose.viewModel
-import androidx.paging.compose.collectAsLazyPagingItems
-import androidx.paging.compose.itemKey
-import com.example.myapplication.GlobalUser
 import com.example.myapplication.R
 import com.example.myapplication.database.MobileAppDataBase
-import com.example.myapplication.database.viewmodels.CardViewModel
-import com.example.myapplication.database.viewmodels.MobileAppViewModelProvider
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 @Composable
-fun MainScreen(navController: NavHostController,
-               cardViewModel: CardViewModel = viewModel(factory = MobileAppViewModelProvider.Factory)) {
+fun MainScreen(navController: NavHostController) {
     val context = LocalContext.current
+    val cards = remember { mutableStateListOf<Card>() }
 
-    val cards = cardViewModel.getAllCards.collectAsLazyPagingItems()
+    LaunchedEffect(Unit) {
+        withContext(Dispatchers.IO) {
+            val database = MobileAppDataBase.getInstance(context)
+            database.cardDao().getAll().collect { data ->
+                cards.clear()
+                data.forEach { cards.add(it) }
+            }
+        }
+    }
     
     Column {
         Box(modifier = Modifier
@@ -77,22 +77,7 @@ fun MainScreen(navController: NavHostController,
             .fillMaxHeight(0.9f)) {
             Column()
             {
-                LazyVerticalGrid(
-                    columns = GridCells.Fixed(1)
-                ) {
-                    item {
-                        addNewListItem(navController, "editcard")
-                    }
-                    items(
-                        count = cards.itemCount,
-                        key = cards.itemKey { item -> item.id!! }
-                    ) { index: Int ->
-                        val card: Card? = cards[index]
-                        if (card != null) {
-                            CardListItem(item = card, navController = navController)
-                        }
-                    }
-                }
+                DataListScroll(navController, cards)
             }
         }
         Column(

app/src/main/java/com/example/myapplication/screens/registration.kt

@@ -4,61 +4,31 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ModifierInfo
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.sp
-import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import androidx.navigation.NavHostController
-import com.example.myapplication.components.ActiveButton
 import com.example.myapplication.components.LoginField
 import com.example.myapplication.components.PasswordField
-import com.example.myapplication.components.PasswordInputField
-import com.example.myapplication.components.PlaceholderInputField
-import com.example.myapplication.components.PlaceholderInputFieldAuth
 import com.example.myapplication.components.navButton
-import com.example.myapplication.database.entities.User
-import com.example.myapplication.database.viewmodels.MobileAppViewModelProvider
-import com.example.myapplication.database.viewmodels.UserViewModel
-import com.example.myapplication.ui.theme.SkyBlue
 
 @Composable
-fun Registration(navController: NavHostController,
-                 userViewModel: UserViewModel = viewModel(
-                    factory = MobileAppViewModelProvider.Factory)) {
-    val login = remember { mutableStateOf("") }
-    val password = remember { mutableStateOf("") }
-    val repeatepassword = remember { mutableStateOf("") }
-
+fun Registration(navController: NavHostController) {
     Column (modifier = Modifier.fillMaxWidth(),
         horizontalAlignment = Alignment.CenterHorizontally) {
-        PlaceholderInputFieldAuth(label = "Логин", isSingleLine = true, onTextChanged = {newlogin ->
-            login.value = newlogin
-        })
-        PasswordInputField(label = "Пароль", onPasswordChanged = {newpassword ->
-            password.value = newpassword
-        })
-        PasswordInputField(label = "Повторите пароль", onPasswordChanged = {newpassword ->
-            repeatepassword.value = newpassword
-        })
-        ActiveButton(label = "Зарегистрироваться", backgroundColor = SkyBlue,
-            textColor = Color.Black, onClickAction = {
-                if (password.value == repeatepassword.value){
-                    userViewModel.regUser(
-                        User(
-                            login = login.value,
-                            password = password.value,
-                        )
-                    )
-                }
-                navController.navigate("authorization")
-            })
-        navButton(navController = navController, destination = "authorization",
-            label = "Назад", backgroundColor = SkyBlue, textColor = Color.Black)
+        Text(text = "Привет!",
+            fontSize = 20.sp,
+            fontWeight = FontWeight.Bold)
+        Text(text = "Зарегистрируйся, чтобы начать!",
+            fontSize = 20.sp,
+            fontWeight = FontWeight.Bold)
+        LoginField(text = "Логин")
+        PasswordField(text = "Пароль")
+        PasswordField(text = "Повторите пароль")
+        navButton(navController = navController, destination = "authorization", label = "Зарегистрироваться", backgroundColor = Color.Cyan, textColor = Color.Black)
     }
 }

app/src/main/java/com/example/myapplication/screens/user.kt

@@ -19,47 +19,35 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import androidx.navigation.NavHostController
-import com.example.myapplication.GlobalUser
-import com.example.myapplication.MobileApp
 import com.example.myapplication.R
-import com.example.myapplication.components.ActiveButton
 import com.example.myapplication.components.LoginField
-import com.example.myapplication.components.PlaceholderInputField
 import com.example.myapplication.components.navBar
 import com.example.myapplication.database.MobileAppDataBase
-import com.example.myapplication.database.entities.Card
 import com.example.myapplication.database.entities.User
-import com.example.myapplication.database.viewmodels.MobileAppViewModelProvider
-import com.example.myapplication.database.viewmodels.UserViewModel
 import com.example.myapplication.ui.theme.SkyBlue
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 
 @Composable
-fun UserSettings(navController: NavHostController,
-                 userViewModel: UserViewModel = viewModel(factory = MobileAppViewModelProvider.Factory)) {
+fun UserSettings(navController: NavHostController) {
     val context = LocalContext.current
+
     val login = remember { mutableStateOf("") }
     val password = remember { mutableStateOf("") }
-    val userId = GlobalUser.getInstance().getUser()?.id?: 1
+    val userId = 1
 
-    LaunchedEffect(Unit) {
-        userId?.let {
-            userViewModel.getUser(userId).collect {
-                if (it != null) {
-                    login.value = it.login
-                }
-                if (it != null) {
-                    password.value = it.password
-                }
+    userId?.let {
+        LaunchedEffect(Unit) {
+            withContext(Dispatchers.IO) {
+                val user = MobileAppDataBase.getInstance(context).userDao().getById(userId!!)
+                login.value = user!!.login
+                password.value = user!!.password
             }
         }
     }
@@ -69,7 +57,7 @@ fun UserSettings(navController: NavHostController,
             Column(
                 modifier = Modifier.fillMaxSize(),
                 horizontalAlignment = Alignment.CenterHorizontally
-                ) {
+            ) {
                 Image(
                     painter = painterResource(id = R.drawable.user),
                     contentDescription = "login",
@@ -77,18 +65,8 @@ fun UserSettings(navController: NavHostController,
                     modifier = Modifier
                         .size(300.dp)
                 )
-                PlaceholderInputField(label = "Логин пользователя: ${login.value}", isSingleLine = true, onTextChanged = {newlogin ->
-                    login.value = newlogin})
-                PlaceholderInputField(label = "Пароль пользователя: ${password.value}", isSingleLine = true, onTextChanged = {newpassword ->
-                    password.value = newpassword})
-                ActiveButton(label = "Сохранить изменения", backgroundColor = SkyBlue, textColor = Color.Black, onClickAction =
-                {
-                    userViewModel.updateUser(User(
-                        id = userId,
-                        login = login.value,
-                        password = password.value
-                    ))
-                })
+                LoginField(text = "Логин пользователя: ${login.value}")
+                LoginField(text = "Пароль пользователя: ${password.value}")
             }
         }
         Column(modifier = Modifier