我有一个问题,我无法构建项目,因为以下错误,当我将suspend
关键字添加到数据访问对象中的addNumber
方法时发生:
error: Type of the parameter must be a class annotated with @Entity or a collection/array of it.
kotlin.coroutines.Continuation<? super kotlin.Unit> $completion);
^
我的道:
typealias NumberListLiveData = LiveData<List<Number>>
@Dao
interface NumbersDao {
@Insert(onConflict = OnConflictStrategy.IGNORE)
suspend fun addNumber(number: Number)
@Query("SELECT * FROM numbers_table")
fun getAllNumbers(): NumberListLiveData
}
我的实体:
@Entity(tableName = "numbers_table")
data class Number(
@PrimaryKey(true)
val id: Int,
@ColumnInfo(name = "value")
val value: Int
)
Build.gradle.ktx:
plugins {
id("com.android.application")
id("org.jetbrains.kotlin.android")
id("kotlin-kapt")
}
android {
namespace = "com.ilya.room"
compileSdk = 33
defaultConfig {
applicationId = "com.ilya.room"
minSdk = 26
targetSdk = 33
versionCode = 1
versionName = "1.0"
testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
isMinifyEnabled = false
proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"),
"proguard-rules.pro")
}
}
compileOptions {
sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = "1.8"
}
buildFeatures {
viewBinding = true
}
}
dependencies {
val roomVersion = "2.5.2"
// Coroutines
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4")
// Room
implementation("androidx.room:room-runtime:$roomVersion")
kapt("androidx.room:room-compiler:$roomVersion")
implementation("androidx.room:room-ktx:$roomVersion")
implementation("androidx.core:core-ktx:1.9.0")
implementation("androidx.appcompat:appcompat:1.6.1")
implementation("com.google.android.material:material:1.9.0")
implementation("androidx.constraintlayout:constraintlayout:2.1.4")
testImplementation("junit:junit:4.13.2")
androidTestImplementation("androidx.test.ext:junit:1.1.5")
androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
}
先谢谢你。
1条答案
按热度按时间91zkwejq1#
Number
中有一个类型与您定义的类型冲突。要验证这一点,请使用完整的软件包名称指定类型,例如。
com.example.app.model.Number
如果这样做可以修复它,只要确保导入它,这样它就会掩盖Kotlin类型。