【Room】エラー虎の巻 - Ki-Kobayashi/Android-Wiki GitHub Wiki

🛑 Kotlin1.9でRoomを使用すると、Daoでエラーが出る

TaskDao.java:19: �G���[: Type of the parameter must be a class annotated with @Entity or a collection/array of it.
    kotlin.coroutines.Continuation<? super kotlin.Unit> $completion);
                                                        ^
TaskDao.java:17: �G���[: Not sure how to handle insert method's return type.
    public abstract java.lang.Object insertTask(@org.jetbrains.annotations.NotNull
TaskDao.java:27: �G���[: Not sure how to handle delete method's return type. Currently the supported return types are void, int or Int.
    public abstract java.lang.Object deleteTask(@org.jetbrains.annotations.NotNull
TaskDao.java:29: �G���[: Type of the parameter must be a class annotated with @Entity or a collection/array of it.
    kotlin.coroutines.Continuation<? super kotlin.Unit> $completion);
TaskDao.java:35: �G���[: Type of the parameter must be a class annotated with @Entity or a collection/array of it.
    kotlin.coroutines.Continuation<? super kotlin.Unit> $completion);
TaskDao.java:33: �G���[: Not sure how to handle update method's return type. Currently the supported return types are void, int or Int.
    public abstract java.lang.Object updateTask(@org.jetbrains.annotations.NotNull

💡原因💡

下記の組み合わせ内容で発生するよう。。。

kotlinのバージョン
Roomのバージョン
kapt / ksp

🌟参考：https://issuetracker.google.com/issues/236612358

💡解決方法💡

※kotlin1.9の場合（proj / build.gradle > "org.jetbrains.kotlin.android"箇所で確認）

kaptからkspに変更する
kspのバージョンを1.9.0などバージョンに合わせる
Roomのバージョン：1.6.0~
Hiltのバージョン：2.48~（ksp利用のため一応あげとく）

🟩 proj / build.gradle

plugins {
    id("com.android.application") version "8.2.0" apply false
    id("org.jetbrains.kotlin.android") version "1.9.0" apply false　💡※kotlin1.9
    id("com.google.dagger.hilt.android") version "2.48" apply false
    id("com.google.devtools.ksp") version "1.9.0-1.0.12"
}

🟩 app / build.gradle

plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
 💡id("com.google.devtools.ksp")
    id("com.google.dagger.hilt.android")
}

android {...}

dependencies {
    implementation("androidx.core:core-ktx:1.10.1")
    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.1")
    implementation("androidx.activity:activity-compose:1.7.0")
    implementation(platform("androidx.compose:compose-bom:2023.08.00"))
    implementation("androidx.compose.ui:ui")
    implementation("androidx.compose.ui:ui-graphics")
    implementation("androidx.compose.ui:ui-tooling-preview")
    implementation("androidx.compose.material3:material3")
    testImplementation("junit:junit:4.13.2")
    androidTestImplementation("androidx.test.ext:junit:1.1.5")
    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
    androidTestImplementation(platform("androidx.compose:compose-bom:2023.08.00"))
    androidTestImplementation("androidx.compose.ui:ui-test-junit4")
    debugImplementation("androidx.compose.ui:ui-tooling")
    debugImplementation("androidx.compose.ui:ui-test-manifest")

  💡val room_version = "2.6.0"
    implementation("androidx.room:room-runtime:$room_version")
    annotationProcessor("androidx.room:room-compiler:$room_version")
  💡ksp("androidx.room:room-compiler:$room_version")
    implementation("androidx.room:room-ktx:$room_version")

  💡val hilt_version = "2.48"
    implementation("com.google.dagger:hilt-android:$hilt_version")
  💡ksp("com.google.dagger:hilt-android-compiler:$hilt_version")
}