在使用 android Room 时，我有以下实体：
@Entity
public class Call implements Parcelable {
@PrimaryKey(autoGenerate = true)
private long id;
private String filePath;
private long durationInMillis;
private String phoneNumber;
private int isStarred;
private int isIncoming;
private long timestampCreated;
}
一切都很好。但现在我希望我的 pojo (Call.class) 扩展一个抽象类，如下所示：
@Entity
public class Call extends BaseViewTypeData implements Parcelable {
....
....
}
我收到以下错误：
Error:Cannot figure out how to save this field into database. You can
consider adding a type converter for it.
Error:Cannot find getter for field.
Error:Cannot find setter for field.
Error:Cannot figure out how to read this field from a cursor.
Error:Cannot find getter for field.
Error:Cannot find setter for field.
父级 (BaseViewTypeData.class) 是一个简单的类，用于处理回收器视图中的多种视图类型。
public abstract class BaseViewTypeData extends BaseObservable {
public static final int VIEW_TYPE_CALL = 0;
public static final int VIEW_TYPE_SETTINGS_HEADER = 1;
public static final int VIEW_TYPE_SETTINGS_TITLE_SUBTITLE = 2;
public static final int VIEW_TYPE_SETTINGS_TITLE_SUBTITLE_SWITCH = 3;
public static final int VIEW_TYPE_SETTINGS_DIVIDER = 4;
public static final int VIEW_TYPE_SETTINGS_TITLE_SWITCH = 5;
public static final int VIEW_TYPE_CALL_LOG_DATA = 6;
public static final int VIEW_TYPE_CHECKBOX_TITLE_SUBTITLE = 7;
@Ignore
public abstract int getViewType();
}