René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"保存SD卡缓存有Bug","articleBody":"DataCache：  \r\n public \u003cT extends Serializable\u003e void saveData(@NonNull String key, @NonNull T data) {\r\n        mLruCache.put(key, data);\r\n        mDiskCache.put(key, data, ACache.TIME_WEEK);     // 数据缓存时间为 1 周\r\n    }\r\n执行到最后:\r\n\r\n    /**\r\n     * 保存 byte数据 到 缓存中\r\n     *\r\n     * @param key   保存的key\r\n     * @param value 保存的数据\r\n     */\r\n    public void put(String key, byte[] value) {\r\n        File file = mCache.newFile(key);\r\n    ....\r\n      mCache.put(file);\r\n   }\r\n\r\n  private File newFile(String key) {\r\n            return new File(cacheDir, key.hashCode() + \"\");\r\n        }\r\n      private void put(File file) {\r\n            .....\r\n            Long currentTime = System.currentTimeMillis();\r\n            file.setLastModified(currentTime);\r\n            lastUsageDates.put(file, currentTime);\r\n        }\r\n每次put操作，会新建一个File对象，然后将该引用保存到lastUsageDates中\r\n///////////////////////////////////////////////////////\r\nget操作\r\n  public \u003cT extends Serializable\u003e T getData(@NonNull String key) {\r\n        T result = (T) mLruCache.get(key);\r\n        if (result == null) {\r\n            result = (T) mDiskCache.getAsObject(key);\r\n            if (result != null) {\r\n                mLruCache.put(key, result);\r\n            }\r\n        }\r\n        return result;\r\n    }\r\n\r\n    /**\r\n     * 获取 byte 数据\r\n     *\r\n     * @param key\r\n     * @return byte 数据\r\n     */\r\n    public byte[] getAsBinary(String key) {\r\n        RandomAccessFile RAFile = null;\r\n        boolean removeFile = false;\r\n        try {\r\n            File file = mCache.get(key);\r\n      ....\r\n     }\r\n      private File get(String key) {\r\n            File file = newFile(key);\r\n            Long currentTime = System.currentTimeMillis();\r\n            file.setLastModified(currentTime);\r\n            lastUsageDates.put(file, currentTime);\r\n\r\n            return file;\r\n        }\r\n\r\n每次get操作，都会创建一个新的File对象，然后将这个File引用保存到lastUsageDates中。\r\n//////////////////////////////////////////////////////////////////\r\n那么，bug就是，比如，我存放一个SD卡缓存,key是loginInfo，保存到SD卡中的一个文件。\r\n然后，我不断去get，会不断添加新的File引用到lastUsageDates。lastUsageDates中，使用的key是File引用值，每个新创建的File对象，它们的引用值都是不同的，即使它们指向相同的文件。\r\n\r\n","author":{"url":"https://github.com/ttylinux","@type":"Person","name":"ttylinux"},"datePublished":"2017-04-08T09:26:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/5/diycode/issues/5"}