如何在后台任务中正确使用Android Room (与UI无关)

dependencies {
    def room_version = "2.4.0"

    implementation "androidx.room:room-runtime:$room_version"
    annotationProcessor "androidx.room:room-compiler:$room_version"
}

@Database(entities = {YourEntity.class}, version = 1)
public abstract class YourDatabase extends RoomDatabase {
    public abstract YourDao yourDao();

    private static YourDatabase instance;

    public static synchronized YourDatabase getInstance(Context context) {
        if (instance == null) {
            instance = Room.databaseBuilder(context.getApplicationContext(),
                    YourDatabase.class, "your_database")
                    .build();
        }
        return instance;
    }
}

@Entity(tableName = "your_table")
public class YourEntity {
    @PrimaryKey
    public int id;

    public String name;
    // 其他列...
}

@Dao
public interface YourDao {
    @Insert
    void insert(YourEntity entity);

    @Query("SELECT * FROM your_table")
    List<YourEntity> getAllEntities();
    // 其他查询、更新、删除方法...
}

YourDatabase database = YourDatabase.getInstance(context);
YourDao dao = database.yourDao();

// 插入数据
YourEntity entity = new YourEntity();
entity.id = 1;
entity.name = "Example";
dao.insert(entity);

// 查询数据
List<YourEntity> entities = dao.getAllEntities();