How to get the size of an image stored in Object storage

If you're looking at how much memeory it takes when you load it, use

System.getSystemStats().freeMemory before you load and after, and look at the difference.

On devices with the Graphics Pool, it will have far less an impact on your apps memory.  The f7 devices have a graphics pool.

JIM, my purpose is to see how many pictures I can persistent in Storage.I know the limit is 32kB totally, but don't know the size of the image processed and received by my device. I think there are under 10kB but not sure the accuracy value.

Try taking a typical one and keep saving it with different keys until you get an error

also, the way I read this is each key is limited to 32k.  Not Storage in total:  That varies by device

Values can also be of type Array or Dictionary containing the above listed types, excluding BitmapResource and AnimationResource. There is a limit on the size of the Object Store that can vary between devices. If you reach this limit, the value will not be saved and an exception will be thrown. Also, values are limited to 32 KB in size.

Maybe just do a try/catch and handle the case when storage is full in a graceful way?

Do you want to know it in runtime or to show size when developing?

a bit difficult but possible, this image is from webrequest?

With try/catch you can display a nice message when you run out of space and not crash your app.

Nice idea!