Question 277454 in Flutter Question posted in
The official Flutter documentation can be found here.

Only cached image in Flutter CachedNetworkImage for app session

Just want to get clarification on below coding. cacheDuration set seconds to 0 caches avatar.jpg for the app session, any subsequent used is getting from cache. Once app is closed, avatar.jpg will be deallocated from cache. Am I right ?

CachedNetworkImage(
imageUrl: ‘https://example.com/avatar.jpg’,
cacheDuration: const Duration(seconds: 0),
);

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2

Answers


  1. 0

    The image is stored in memory during your session, rather than on your device’s disk. It will be removed from the cache once you close the app.

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  2. 0

    cached_network_image use the flutter_cache_manager library to manage cached files. Here is what the doc says :

    the cache deletes files when there are too many, ordered by last use, and when files just haven’t been used for longer than the stale period

    So I think your solution with a Duration of 0 will work but you can also try a cleaner solution (I think): try to delete all the cached image at the start of your app (in the main() method for exemple).

    To clean all cache you can try this (it will remove old cached images):

    await DefaultCacheManager().emptyCache();
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