aleyckin/MobileApp
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3-ая не работает все еще

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Артём Алейкин 2023-12-18 22:09:12 +04:00
parent 0e97bb7444
commit ad397832d9
6 changed files with 97 additions and 102 deletions
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3
app/build.gradle.kts
View File

@ -11,7 +11,7 @@ android {
defaultConfig {
applicationId = "com.example.myapplication"
minSdk = 24
targetSdk = 33
targetSdk = 34
versionCode = 1
versionName = "1.0"
@ -50,6 +50,7 @@ android {
}
}
dependencies {
implementation("androidx.core:core-ktx:1.9.0")

73
app/src/main/java/com/example/myapplication/database/MobileDatabase.kt
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@ -1,14 +1,13 @@
import android.content.Context
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.drawable.BitmapDrawable
import android.util.Log
import androidx.room.Database
import androidx.room.Room
import androidx.room.RoomDatabase
import androidx.room.TypeConverters
import androidx.sqlite.db.SupportSQLiteDatabase
import com.example.myapplication.R
import com.example.myapplication.database.ImageConverter
import com.example.myapplication.database.entities.ImageConverter
import com.example.myapplication.database.dao.CardDao
import com.example.myapplication.database.dao.UserDao
import com.example.myapplication.database.entities.Card
@ -23,36 +22,23 @@ abstract class MobileAppDataBase : RoomDatabase() {
abstract fun userDao(): UserDao
abstract fun cardDao(): CardDao
companion object{
companion object {
private const val DB_NAME: String = "my-db"
@Volatile
private var INSTANCE: MobileAppDataBase? = null
suspend fun initialDataBase(appContext: Context){
INSTANCE?.let { database ->
val userDao = database.userDao()
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(Card(name = "Феррари Имба", location = "г. Ульяновск",
image = BitmapFactory.decodeResource(appContext.resources, R.drawable.ferrari_laferrari_car2), mileage = 7322, price = 125000, userId = 1)
)
cardDao.insert(Card(name = "Москоувич", location = "г. Москва",
image = BitmapFactory.decodeResource(appContext.resources, R.drawable.moscowich_car3), mileage = 156771, price = 1000, userId = 1)
)
}
}
fun getInstance(appContext: Context): MobileAppDataBase {
return INSTANCE ?: synchronized(this) {
Room.databaseBuilder(
INSTANCE?.let { return@let it } // Возвращаем INSTANCE, если он уже был создан
val instance = Room.databaseBuilder(
appContext,
MobileAppDataBase::class.java,
DB_NAME
)
.addCallback(object : Callback() {
.fallbackToDestructiveMigration()
.addCallback(object : RoomDatabase.Callback() {
override fun onCreate(db: SupportSQLiteDatabase) {
super.onCreate(db)
CoroutineScope(Dispatchers.IO).launch {
@ -60,9 +46,48 @@ abstract class MobileAppDataBase : RoomDatabase() {
}
}
})
.fallbackToDestructiveMigration()
.also { INSTANCE = it.build() } // Сохраняем INSTANCE
.build()
.also { INSTANCE = it }
Log.d("Database", "Database instance created")
instance // Возвращаем созданный instance
}
}
private suspend fun initialDataBase(appContext: Context) {
INSTANCE?.let { database ->
val userDao = database.userDao()
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(
Card(
name = "Феррари Имба",
location = "г. Ульяновск",
image = BitmapFactory.decodeResource(
appContext.resources,
R.drawable.ferrari_laferrari_car2
),
mileage = 7322,
price = 125000,
userId = 1
)
)
cardDao.insert(
Card(
name = "Москоувич",
location = "г. Москва",
image = BitmapFactory.decodeResource(
appContext.resources,
R.drawable.moscowich_car3
),
mileage = 156771,
price = 1000,
userId = 1
)
)
}
}
}

2
app/src/main/java/com/example/myapplication/database/entities/Card.kt
View File

@ -5,8 +5,6 @@ import androidx.room.ColumnInfo
import androidx.room.Entity
import androidx.room.ForeignKey
import androidx.room.PrimaryKey
import androidx.room.TypeConverters
import com.example.myapplication.database.ImageConverter
@Entity(
tableName = "cards",

2
app/src/main/java/com/example/myapplication/database/ImageConverter.kt → app/src/main/java/com/example/myapplication/database/entities/ImageConverter.kt
View File

@ -1,4 +1,4 @@
package com.example.myapplication.database
package com.example.myapplication.database.entities
import android.graphics.Bitmap
import android.graphics.BitmapFactory

12
app/src/main/java/com/example/myapplication/screens/authorization.kt
View File

@ -1,5 +1,6 @@
package com.example.myapplication.screens
import android.util.Log
import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
@ -42,9 +43,14 @@ fun Authorization(navController: NavHostController){
LaunchedEffect(Unit) {
withContext(Dispatchers.IO) {
MobileAppDataBase.getInstance(context).userDao().getAll().collect { data ->
users.clear()
users.addAll(data)
try {
val database = MobileAppDataBase.getInstance(context.applicationContext)
database.userDao().getAll().collect { data ->
users.clear()
users.addAll(data)
}
} catch (e: Exception) {
Log.e("DatabaseError", "Error accessing database", e)
}
}
}

105
app/src/main/java/com/example/myapplication/screens/mainScreen.kt
View File

@ -1,5 +1,6 @@
package com.example.myapplication.screens
import android.util.Log
import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.border
@ -25,8 +26,10 @@ import com.example.myapplication.database.entities.Card
import com.example.myapplication.ui.theme.SkyBlue
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
@ -40,11 +43,14 @@ import androidx.compose.material3.ButtonDefaults
import androidx.compose.material3.Card
import androidx.compose.material3.CardDefaults
import androidx.compose.material3.Text
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.mutableStateListOf
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.sp
import com.example.myapplication.R
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
@Composable
@ -54,80 +60,39 @@ fun MainScreen(navController: NavHostController) {
LaunchedEffect(Unit) {
withContext(Dispatchers.IO) {
MobileAppDataBase.getInstance(context).cardDao().getAll().collect { data ->
cards.clear()
cards.addAll(data)
}
}
}
Column(
modifier = Modifier
.fillMaxSize()
.background(Color.White)
) {
DataListScroll(navController, cards)
}
Column(
modifier = Modifier
.fillMaxSize()
.background(SkyBlue),
verticalArrangement = Arrangement.Center
) {
navBar(navController = navController)
}
}
/*@Composable
private fun ListItem(
card: Card,
navController: NavHostController
) {
val bitmap = remember(card) {
BitmapFactory.decodeByteArray(card.image, 0, card.image.size)
}
val imageBitmap = remember(bitmap) {
bitmap.asImageBitmap()
}
Card(
modifier = Modifier
.fillMaxWidth()
.padding(10.dp)
.border(2.dp, Color.Gray, RoundedCornerShape(15.dp)),
shape = RoundedCornerShape(15.dp),
elevation = CardDefaults.cardElevation(defaultElevation = 5.dp),
) {
Box {
Row(verticalAlignment = Alignment.CenterVertically) {
Image(
painter = remember {
BitmapPainter(imageBitmap)
},
contentDescription = "image",
contentScale = ContentScale.Crop,
modifier = Modifier.size(128.dp)
)
Column(
modifier = Modifier.padding(5.dp)
) {
Text(text = card.name, fontWeight = FontWeight.Bold)
Text(text = "Пробег: ${card.mileage}")
Text(text = "Расположение: ${card.location}")
Text(text = "Цена: ${card.price}")
Button(onClick = { navController.navigate("editCard") }) {
Text("Изменить")
}
Button(onClick = { }) {
Text("Удалить")
}
try {
val database = MobileAppDataBase.getInstance(context.applicationContext)
database.cardDao().getAll().collect { data ->
cards.clear()
cards.addAll(data)
}
} catch (e: Exception) {
Log.e("DatabaseError", "Error accessing database", e)
}
}
}
}*/
Box() {
Column(
modifier = Modifier
.fillMaxSize()
.background(Color.White)
.fillMaxHeight(0.9f)
) {
DataListScroll(navController, cards)
}
}
Column(
modifier = Modifier
.fillMaxSize()
.background(SkyBlue)
.fillMaxHeight(0.1f),
verticalArrangement = Arrangement.Center
) {
navBar(navController = navController)
}
}
@Composable
fun <T : Any> DataListScroll(navController: NavHostController, dataList: List<T>){