Question

这是我遇到的错误，

java.lang.IllegalStateException: Room cannot verify the data integrity.  Looks like you've changed schema but forgot to update the version number. You can simply fix this by increasing the version number.
                                                                                at android.arch.persistence.room.RoomOpenHelper.checkIdentity(RoomOpenHelper.java:135)
                                                                                at android.arch.persistence.room.RoomOpenHelper.onOpen(RoomOpenHelper.java:115)
                                                                                at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.onOpen(FrameworkSQLiteOpenHelper.java:151)
                                                                                at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:411)
                                                                                at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:298)
                                                                                at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.getWritableSupportDatabase(FrameworkSQLiteOpenHelper.java:96)
                                                                                at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper$OpenHelper.getWritableSupportDatabase(FrameworkSQLiteOpenHelper.java:100)
                                                                                at android.arch.persistence.db.framework.FrameworkSQLiteOpenHelper.getWritableDatabase(FrameworkSQLiteOpenHelper.java:54)
                                                                                at android.arch.persistence.room.RoomDatabase.query(RoomDatabase.java:233)

我的数据库类是

@Database(entities = SliderImageModel.class, version = DbConfig.Version_SliderImage_84, exportSchema = false)
public abstract class SliderImageDatabase extends RoomDatabase {

    public abstract SliderImageDao sliderImageDao();

    public static SliderImageDatabase INSTANCE;

    private static final Migration MIGRATION_1_84 = new Migration(DbConfig.Version_NewsAnnouncement_1, DbConfig.Version_SliderImage_84) {
        @Override
        public void migrate(@NonNull SupportSQLiteDatabase database) {
            database.execSQL(SLIDERIMAGE);
        }
    };
    private static final Migration MIGRATION_2_84 = new Migration(DbConfig.Version_SchoolEvent_2, DbConfig.Version_SliderImage_84) {
        @Override
        public void migrate(@NonNull SupportSQLiteDatabase database) {
            database.execSQL(SLIDERIMAGE);
        }
    };

Answer 1

尝试通过增加版本号来尝试以下操作，

@Database(entities = pojo.class, exportSchema= false, version=2 )

无法找出会议室数据库版本错误

1 个答案: