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FLYWEIGHT refers to the lightest weight in boxing. The meta-sharing mode efficiently supports a large number of fine-grained objects in a shared way. The key to sharing the meta-sharing mode is to distinguish the intrinsic state from the extrinsic state. The intrinsic state is stored in the element and will not vary with the change of environment. The exogenous state changes with the change of environment. The extrinsic state cannot affect the intrinsic state, they are independent of each other. Distinguish the states that can be shared from the states that cannot be shared from the regular class, and eliminate the states that cannot be shared from the class. Clients cannot directly create shared objects, but should use a factory object to create shared objects. The meta-sharing mode greatly reduces the number of objects in memory.一个小男孩找到了一个讲故事的神秘玩具制造商。首先是妖精试图报复没有防备的家庭。第二个是一个对脆弱的主人恶作剧的娃娃。玩具制作者给男孩一个叫吉格斯的小丑。小丑应该是幸福的守护者，对吗？这些邪恶的小事情将导致您许多不眠之夜。看到无关的好人受苦会难过，会怜悯，但从没到会拯救的程度。可能是暂时的，可是更可能是永远。Private Disk disk;Note: The singleton methods used in Android source code include: InputMethodManager, AccessibilityManager, etc. all use this singleton mode.