I'm creating a Room DB for an app I've making, and I keep getting the following exception/error whenever I try and run my code:
Cannot find setter for field. - value in java.lang.String
This is extremely frustrating. I have tried to look through some other people's suggestions, and I have tried to fix my code accordingly although I am still getting the same error.
I am extremely confused as to where the source of the problem is because of the vagueness of the error message. I have tried for a couple of hours to fix the code but nothing is really working, so I'd thought I would ask it here.
PixelArts Kotlin Class
import androidx.room.*
import java.time.LocalDateTime
import java.time.format.DateTimeFormatter
@Entity
data class PixelArts(
@ColumnInfo(name = "item_bitmap") var bitmap: String,
@ColumnInfo(name = "item_title") var title: String,
@ColumnInfo(name = "item_pixel_data") var pixelData: String,
@ColumnInfo(name = "item_favourited") var favourited: Boolean,
@ColumnInfo(name = "item_date_created") var dateCreated: String = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss").format(LocalDateTime.now())) {
@PrimaryKey(autoGenerate = true) var id = 0
}
PixelArtCreationsDao.kt
@Dao
interface PixelArtCreationsDao {
@Insert
suspend fun insertPixelArt(pixelArt: PixelArts)
@Query("SELECT * FROM PixelArts ")
fun getAllPixelArtCreations(): String
@Query("DELETE FROM PixelArts WHERE id=:pixelArtId")
fun deletePixelArtCreation(pixelArtId: Int)
@Query("UPDATE PixelArts SET item_pixel_data=:pixelData AND item_bitmap=:bitmap WHERE id=:pixelArtId")
fun updatePixelArtCreation(pixelArtId: Int, bitmap: String, pixelData: String)
}
AppData class
class AppData {
companion object {
var dbFileName = "pixel_art_db"
lateinit var db: PixelArtDatabase
var pixelArtsData = mutableListOf<PixelArts>()
fun initialize() {
pixelArtsData.add(PixelArts(BitmapConverter.bitmapToString(Bitmap.createBitmap(10, 10, Bitmap.Config.ARGB_8888)), "Creation 1", JsonConverter.convertListOfViewToJsonString(listOf()), true))
}
}
}
onCreate method
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setBindings()
setOnClickListeners()
setTitle()
AppData.db = PixelArtDatabase.getDatabase(this)!!
if (databaseFileExists()) {
CoroutineScope(Dispatchers.IO).launch {
AppData.pixelArtsData = AppData.db.pixelArtCreationsDao().getAllPixelArtCreations()
withContext(Dispatchers.Main) {
binding.activityMainRecentCreationsRecyclerView.layoutManager = GridLayoutManager(this@MainActivity, 2)
binding.activityMainRecentCreationsRecyclerView.adapter = RecentCreationsAdapter(AppData.pixelArtsData, this@MainActivity)
}
}
} else {
AppData.initialize()
binding.activityMainRecentCreationsRecyclerView.layoutManager = GridLayoutManager(this, 2)
binding.activityMainRecentCreationsRecyclerView.adapter = RecentCreationsAdapter(AppData.pixelArtsData, this)
CoroutineScope(Dispatchers.IO).launch {
for (pixelArts in AppData.pixelArtsData) {
AppData.db.pixelArtCreationsDao().insertPixelArt(pixelArts)
}
}
}
}
Converters (maybe something is wrong here?)
object BitmapConverter {
fun stringToBitmap(str: String): Bitmap? {
return try {
val byte: ByteArray = Base64.decode(str, Base64.DEFAULT)
BitmapFactory.decodeByteArray(Base64.decode(str, Base64.DEFAULT), 0, byte.size)
} catch (exception: Exception) {
exception.printStackTrace()
null
}
}
fun bitmapToString(bitmap: Bitmap): String {
val byteArrayOutputStream = ByteArrayOutputStream()
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream)
return Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT)
}
}
object JsonConverter {
fun convertListOfViewToJsonString(list: List<View>) = Gson().toJson(list)
fun convertJsonStringToListOfView(str: String) = Gson().fromJson(str, Array<View>::class.java).toList()
}
build.gradle
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-kapt'
}
android {
compileSdk 31
testOptions {
unitTests.includeAndroidResources = true
}
defaultConfig {
applicationId "com.realtomjoney.pyxlmoose"
minSdk 27
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
buildFeatures {
viewBinding true
}
testOptions {
unitTests.returnDefaultValues = true
}
}
dependencies {
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
implementation 'com.google.android.material:material:1.5.0-beta01'
testImplementation 'junit:junit:4.13.2'
testImplementation 'androidx.test:core-ktx:1.4.0'
androidTestImplementation 'androidx.test.ext:junit-ktx:1.1.3'
testImplementation 'org.robolectric:robolectric:4.4'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.0-alpha03'
androidTestImplementation 'androidx.test:rules:1.4.1-alpha03'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-contrib:3.0.2'
// ROOM
implementation "androidx.room:room-runtime:2.3.0"
implementation "androidx.room:room-ktx:2.3.0"
kapt "androidx.room:room-compiler:2.3.0"
// COROUTINE
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.0-RC'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.0-RC'
implementation 'com.google.code.gson:gson:2.8.6'
}
Image:
If you find an issue with this question, or you think for some reason it's not well written then tell me in the comments the exact problem. Don't be an elitist.
This question is unique than similar posts because I've tried every possible 'solution' and the problem still resides.
