我很茫然。我只是想实现Android的房间教程发现here .我一直收到这个错误:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> javax.annotation.processing.FilerException: Attempt to recreate a file for type com.example...dao.UserDao_Impl
尽管重新尝试了三次教程。如果有帮助的话:
我的DAO:
@Dao
public interface UserDao {
// LiveData<> respects app lifecycle
@Query("SELECT * FROM user")
LiveData<List<User>> getAll();
@Query("SELECT * FROM user WHERE id IN (:userIds)")
List<User> loadAllByIds(int[] userIds);
@Query("SELECT * FROM user WHERE first_name LIKE :first AND " +
"last_name LIKE :last LIMIT 1")
User findByName(String first, String last);
@Insert
void insert(User planetEntity);
@Insert
void insertAll(User... users);
@Delete
void delete(User user);
}
我的数据库:
@Database(entities = {User.class}, version = 1, exportSchema = false)
@TypeConverters({Converters.class})
public abstract class AppRoomDatabase extends RoomDatabase {
private static final String DATABASE_NAME = "climbing_app_database";
private static AppRoomDatabase INSTANCE;
public abstract UserDao userDao();
public static AppRoomDatabase getDatabase(final Context context) {
if (INSTANCE == null) {
synchronized (AppRoomDatabase.class) {
if (INSTANCE == null) {
//Creates the DB here
INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
AppRoomDatabase.class, DATABASE_NAME)
.fallbackToDestructiveMigration()
.addCallback(new AppRoomDatabase.Callback() {
@Override
public void onCreate(@NonNull SupportSQLiteDatabase db) {
super.onCreate(db);
}
})
.build();
}
}
}
return INSTANCE;
}
}
如果有人能告诉我我有多像香肠,我会很感激的。
我试着重复教程3次,但我必须跳过自动驾驶仪的东西,因为我只是想 curl 成一个球
1条答案
按热度按时间fzsnzjdm1#
检查你的build.gradle(模块级)文件,在我的情况下(我混合了Java和Kotlin),我两者都有
和
删除任何我不需要的解决了我的问题。更多信息请参考此问题Trying to create room database with android, but keep getting dependency error中接受的答案。