Image data caching method

Abstract

The invention discloses an image data caching method. The image cache is realized through memory cache and SD(Secure Digital) card cache. The memory cache comprises two levels of cache, and the SD card cache comprises a layer of cache. The specific realization process is that firstly a caching space is opened up in the memory, the cache stores the data through a strong reference type, the caching space is an eighth of the memory allocated for each application; a second-level caching space is opened up in the memory, so as to store the cache removed from the first-layer memory through the soft reference type; then a catalogue is established in the SD card to store the image data obtained through network request; and finally the data are read. Compared with the prior art, the image data caching method has the advantages of realizing a caching method including the memory cache and the SD card cache through LRU(Least Recently Used) algorithm, being capable of conveniently and rapidly showing the cached image in UI(User Interface) interface, improving user experience, saving flow and strong practicability.

Description

technical field [0001] The invention relates to the technical field of computer applications, in particular to a picture data caching method. Background technique [0002] LRU, the full name of Least Rencetly Used, which is the least recently used, is a very commonly used replacement algorithm, that is, objects that have not been used for the longest time are eliminated. LRU is widely used in the page replacement algorithm in the operating system. Our memory or cache space is limited. When a new object is added, our cache space is insufficient. Data is eliminated or deleted, and LRU chooses to eliminate objects that have not been used for the longest time. [0003] According to the idea of ​​the LRU algorithm, the core of implementing LRU is to have a data structure that can save the objects in the cache based on the access order, so that we can easily know which object is the most recently accessed and which object is the longest unvisited. LruCache chooses the data stru...

AI Technical Summary

Problems solved by technology

[0005] When loading and displaying pictures over the Internet in an Android application, for user experience and saving traffic, the picture cache must be used. The cached picture can also quickly display the picture on the UI, which plays a very important role in improving the user experience. However, the existing image loading methods are relatively backward and not very practical

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