[BUG] Image is not refreshed when other client modifies it

[jesmrec]

Steps to reproduce

1. Download an image in the Android app
2. With other client, modify the image
3. In the app, open the image again

Current behaviour

Image is not updated, you see the old version. Thumbnail is updated.

Expected behaviour

New version of the image in the server, so in the moment of downloading, the new version must be downloaded and displayed.

Environment data

Android version: 11 & 7

Device model: Pixel 2 & Nexus 6P

ownCloud app version: 2.15.3

ownCloud server version: 10.5

[abelgardep]

We use glide to show images, and it uses its own cache, so when we update the image, it keeps using its cached image.

[jesmrec]

From my pov, this is not a good behaviour, no matter where the problem is. It is not a data loss, but points to a lack of sync. We have to look for posible solutions.

[abelgardep]

Of course it is not a good behaviour. I just pointed the problem. It should be fixed. Options:

1. Don't let Glide use its cache
2. Try to tell glide when it needs to refresh its cache