Avoid removal of some images from cache

[pallavgrover]

Glide Version:

Integration libraries:4.0.0-RC1

Device/Android Version: Independent

Issue details / Repro steps / Use case background: I want few images which should not be removed from cache. #501 I followed this to extend glideUrl and sending my specific key but any idea on how to avoid deletion of some specific images from cache?

Glide load line / GlideModule (if any) / list Adapter code (if any):

Glide.with...

Layout XML:

<FrameLayout xmlns:android="...

Stack trace / LogCat:

paste stack trace and/or log here

[TWiStErRob]

Simple answer: you can't, that's the point of LRU

More promising answer: make sure the files are used to keep them on top of the recency list

Proper answer: Glide is not an offline storage/network downloader API, the caches are there to make image display smooth. The fact that you can access the File object is just gratis, also you can't delete a group of images from cache. If you want proper offline storage, implement one using OkHttp or Volley, or find a lib that does it for you (there must be some). Once you have this, use .load(offlineFile).diskCacheStrategy(NONE) to prevent duplicating the offline-stored file (already on disk) in Glide's disk caches. (For very small thumbnail displays and big images it's worth considering RESOURCE instead of NONE to improve scrolling speed.)

[nvmnghia]

@TWiStErRob We have a MemoryCache interface, and it is stated that we can provide our own. Why is it not possible?