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LruCache 使用及原理
source link: https://juejin.im/post/5b5d4e2d6fb9a04fc226c09f
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1. LruCache 是什么？ 要搞清楚 LruCache 是什么之前，首先要知道 Android 的缓存策略。其实缓存策略很简单，举个例子，就是用户第一次使用网络加载一张图片后，下次加载这张图片的时候，并不会从网络加载，而是会从内存或者硬盘加载这张图片。
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