Room DB：Dao 和 RoomDatabase 类的重复类问题

Question

我的应用程序中有一个简单的 Room 实现，但在构建应用程序时遇到了 Dao 和 RoomDatabase 类的问题（构建失败）。

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1. Dao 类是“NoteDao”

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   @Dao\ninterface NoteDao {\n\n @Query("SELECT * FROM notes")\n suspend fun getAllNotes(): List<Note>\n\n @Query("SELECT * FROM notes WHERE uid = :uid")\n suspend fun getNoteByUid(uid: Int): Note\n\n @Insert(onConflict = OnConflictStrategy.REPLACE)\n suspend fun insertNote(note: Note): Long\n\n @Delete\n suspend fun deleteNote(note: Note): Int\n}\n

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2. 房间数据库类

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    @Database(\n     entities = [Note::class],\n     version = 1,\n     exportSchema = false\n )\n abstract class AppDatabase : RoomDatabase() {\n\n abstract fun noteDao() : NoteDao\n\n companion object {\n\n     @Volatile private var instance: AppDatabase? = null\n\n     fun getDatabase(context: Context): AppDatabase =\n         instance ?: synchronized(this) { instance ?: buildDatabase(context).also { instance = it } }\n\n     private fun buildDatabase(appContext: Context) =\n         Room.databaseBuilder(appContext, AppDatabase::class.java, "NADB")\n             .fallbackToDestructiveMigration()\n             .build()\n }\n}\n

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3. 注释实体

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    @Entity(tableName = "notes")\n data class Note (\n         @PrimaryKey(autoGenerate = true)\n         val uid: Long,\n         val title: String,\n         val content: String,\n         @ColumnInfo(name = "image_url") val imageUrl: String,\n         @ColumnInfo(name = "created_on") val createdOn: Long,\n         @ColumnInfo(name = "edited_on") val editedOn: Long\n     )\n

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构建输出错误 -

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1. NoteDao_Impl.java
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/Users/KK/StudioProjects/KK/app/build/ generated/source/kapt/debug/com/task/noteapp/data/daos/NoteDao_Impl.java:29:\n错误：重复的类：com.task.noteapp.data .daos.NoteDao_Impl public\n最终类 NoteDao_Impl 实现 NoteDao {

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和

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2. AppDatabase_Impl.java
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/Users/KK/StudioProjects/KK/app/build/ generated/source/kapt/debug/com/task/noteapp/data/local/AppDatabase_Impl.java:34:\n错误：重复的类：com.task.noteapp.data .local.AppDatabase_Impl\n公共最终类AppDatabase_Impl扩展AppDatabase {

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其次是 -

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任务 \':app:kaptDebugKotlin\' 执行失败。\n执行时发生故障\norg.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction\njava.lang.reflect.InitationTargetException（无错误消息）

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例外是：org.gradle.api.tasks.TaskExecutionException：任务 \':app:kaptDebugKotlin\' 执行失败。\n原因：org.gradle.workers.internal.DefaultWorkerExecutor$WorkExecutionException：执行 org.jetbrains 时发生失败.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction\n由以下原因引起：java.lang.reflect.InitationTargetException

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引起原因：org.jetbrains.kotlin.kapt3.base.util.KaptBaseError：注释处理时出错

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经过进一步调查，我发现相应生成的文件存在以下问题 -

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1. NoteDao_Impl - 类级别错误
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类“NoteDao_Impl”必须声明为抽象或在“NoteDao”中实现\nabstract方法“getAllNotes(Continuation<? super List<?extends\nNote>>)”

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在此类中，“getAllNotes()”方法出现此错误 -

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getAllNotes(Continuation<? super List>)\' in\n\'com.task.noteapp.data.daos.NoteDao_Impl\' 与\n\'getAllNotes(Continuation<? super List<? extends Note>>)\ 冲突' in\n\'com.task.noteapp.data.daos.NoteDao\'; 两种方法都有相同的擦除，但都不会覆盖另一个

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2. AppDatabase_Impl - 类级别错误
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在文件中找到重复的类\n\'/Users/KK/StudioProjects/KK/app/build/ generated/ksp/debug/java/com/task/noteapp/data/local/AppDatabase_Impl.java\'

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据我所知，我的 Room 实现并没有错误。但是，我无法\xe2\x80\x99解决问题。

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依赖关系 -

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def room_version = "2.4.3"\nimplementation "androidx.room:room-runtime:$room_version"\nimplementation "androidx.room:room-ktx:$room_version"\nannotationProcessor "androidx.room:room-compiler:$room_version"\nkapt "androidx.room:room-compiler:$room_version"\nksp "androidx.room:room-compiler:$room_version"\n

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Answer 1

kapt和ksp似乎有冲突。删除 kapt 似乎已经解决了这个问题。

kapt "androidx.room:room-compiler:$room_version"

ksp“androidx.room：房间编译器：$ room_version”