我对方向变化有一些问题。 当我评估改变方向时,数据库被清理。 难道这是我错做的,还是只是它的缺省,我必须恢复和拯救有国名的数据库。
成就
开放你的陈列单和更改活动及设计;以及 标记如下:
<activity
android:configChanges="keyboardHidden|orientation"></activity>
如果你在<代码>onCreate上重新启用数据库,那么除非你还执行<编码>onSaveInstance和onResshopInstanceState,或使用<代码>SavedInstanceState arg to onCreate,以恢复你先前所节约(或两者兼有)的东西,否则你将看到这种行为。
拯救/重建国家的整个点是,系统需要在没有用户知情的情况下杀害和重新开展你的活动,因此,你必须保持你一直以来的幻觉。 发生这种情况的两个最可能的例子
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