目录1. 使用 onSaveInstanceState() 保存临时状态2. 在 onCreate() 或 onRestoreInstanceState() 中恢复状态3. 永编程客栈久性数据存储（推荐方案）4. 处理 View
As a relative newcomer to 开发者_运维问答MFC, I see Device Contexts (DCs) a lot. I vaguely understand that it\'s something to do with drawing, but the specifics are not very well explained anywhere th
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