БД работает

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

@@ -41,22 +41,6 @@ class MainActivity : ComponentActivity() {
                     color = MaterialTheme.colorScheme.background
                 ) {
                     val navController = rememberNavController()
-                    /*val mailSingleton = MailSingleton()
-                    mailSingleton.addMail(Mail(0, 0, "Дзюнзи Ито", "Выложил новый"))
-                    mailSingleton.addMail(Mail(1, 1, "Стивен Кинг", "Меня отменили в Твиттере"))
-                    mailSingleton.addMail(Mail(0, 0, "Дзюнзи Ито", "Выложил новый"))
-                    mailSingleton.addMail(Mail(1, 1, "Стивен Кинг", "Меня отменили в Твиттере"))
-                    mailSingleton.addMail(Mail(0, 0, "Дзюнзи Ито", "Выложил новый"))
-                    mailSingleton.addMail(Mail(1, 1, "Стивен Кинг", "Меня отменили в Твиттере"))
-                    mailSingleton.addMail(Mail(0, 0, "Дзюнзи Ито", "Выложил новый"))
-                    mailSingleton.addMail(Mail(1, 1, "Стивен Кинг", "Меня отменили в Твиттере"))
-
-                    val storySingleton = StorySingleton()
-                    storySingleton.addStory(Story(0, "Чужак", "Знаменитая книга стивена кинга", R.drawable.king))
-                    storySingleton.addStory(Story(1, "Переулок", "История ужасов от Дзюнзи Ито", R.drawable.dzun))
-                    storySingleton.addStory(Story(2, "Чужак", "Знаменитая книга стивена кинга", R.drawable.king))
-                    storySingleton.addStory(Story(3, "Переулок", "История ужасов от Дзюнзи Ито", R.drawable.dzun))*/
-
                     NavBar(navController = navController)
                 }
             }

app/src/main/java/com/example/mobileapp/components/ListContent.kt

@@ -40,6 +40,7 @@ import com.example.mobileapp.database.entities.Story
 import com.example.mobileapp.ui.theme.BackgroundItem2
 import com.example.mobileapp.ui.theme.ButtonColor1
 import com.example.mobileapp.ui.theme.ButtonColor2
+import kotlin.reflect.typeOf
 
 @Composable
 fun <T : Any> DataListScroll(navController: NavHostController, dataList: List<T>){
@@ -49,9 +50,9 @@ fun <T : Any> DataListScroll(navController: NavHostController, dataList: List<T>
             .fillMaxWidth()
     ){
         item {
-            when(dataList[0]){
+            when {
-                is Story -> addNewListItem(navController, "editstory")
+                dataList.isListOf<Story>() -> addNewListItem(navController, "editstory")
-                is Mail -> addNewListItem(navController, "editmail")
+                dataList.isListOf<Mail>() -> addNewListItem(navController, "editmail")
             }
         }
         items(dataList){ item ->
@@ -63,6 +64,10 @@ fun <T : Any> DataListScroll(navController: NavHostController, dataList: List<T>
     }
 }
 
+inline fun <reified T> List<*>.isListOf(): Boolean {
+    return isNotEmpty() && all { it is T }
+}
+
 @Composable
 fun StoryListItem(item: Story, navController: NavHostController){
     val isExpanded = remember {

app/src/main/java/com/example/mobileapp/components/NavigationBar.kt

@@ -118,11 +118,19 @@ fun NavBar(navController: NavHostController) {
                 SettingsScreen(navController = navController)
                 bottomBarState.value = true
             }
+            composable("editstory"){ // Без аргумента
+                EditStoryScreen(navController = navController)
+                bottomBarState.value = false
+            }
             composable("editstory/{storyId}"){ navBackStackEntry ->
                 val storyId = navBackStackEntry.arguments?.getInt("storyId")
                 EditStoryScreen(navController = navController, storyId = storyId)
                 bottomBarState.value = false
             }
+            composable("editmail"){ // Без аргумента
+                EditMailScreen(navController = navController)
+                bottomBarState.value = false
+            }
             composable("editmail/{mailId}"){ navBackStackEntry ->
                 val mailId = navBackStackEntry.arguments?.getInt("mailId")
                 EditMailScreen(navController = navController, mailId = mailId)

app/src/main/java/com/example/mobileapp/database/MobileAppDataBase.kt

@@ -38,11 +38,11 @@ abstract class MobileAppDataBase : RoomDatabase() {
                 userDao.insert(User(id = 1, login = "Дзюнзи Ито", password = "1234", email = "ito@gmail.com"))
                 userDao.insert(User(id = 2, login = "Стивен Кинг", password = "4321", email = "king@gmail.com"))
 
-                val storyDao = database.storyDao()
+                /*val storyDao = database.storyDao()
                 storyDao.insert(Story(title = "Переулок", description = "История ужасов от Дзюнзи Ито",
                     cover = BitmapFactory.decodeResource(null, R.drawable.dzun), userId = 1))
                 storyDao.insert(Story(title = "Чужак", description = "Знаменитая книга стивена кинга",
-                    cover = BitmapFactory.decodeResource(null, R.drawable.king), userId = 2))
+                    cover = BitmapFactory.decodeResource(null, R.drawable.king), userId = 2))*/
 
                 val mailDao = database.mailDao()
                 mailDao.insert(Mail(message = "Выложил новые страницы", userId = 1))

app/src/main/java/com/example/mobileapp/screens/Authorization.kt

@@ -7,10 +7,14 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableStateListOf
+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.ContentScale
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavHostController
@@ -18,11 +22,26 @@ import com.example.mobileapp.R
 import com.example.mobileapp.components.NavigationButton
 import com.example.mobileapp.components.PasswordInputField
 import com.example.mobileapp.components.PlaceholderInputField
+import com.example.mobileapp.database.MobileAppDataBase
+import com.example.mobileapp.database.entities.User
 import com.example.mobileapp.ui.theme.ButtonColor1
 import com.example.mobileapp.ui.theme.ButtonColor2
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 @Composable
 fun Authorization(navController: NavHostController){
+    val context = LocalContext.current
+    val users = remember { mutableStateListOf<User>() }
+
+    LaunchedEffect(Unit) {
+        withContext(Dispatchers.IO) {
+            MobileAppDataBase.getInstance(context).userDao().getAll().collect { data ->
+                users.clear()
+                users.addAll(data)
+            }
+        }
+    }
     Column(
         modifier = Modifier
             .fillMaxSize()