Change aspect ratio of pictures How can I simply change the aspect ratio of pictures on Android 4.2.2? Say from 1920x1080 to 1920x1280.

Background: On my Samsung Galaxy S4 mini, I can take pictures using the native camera app and this gives normal results. I have a remote that needs its special camera app ("Snap remote"), and the output of this app comes in the wrong aspect ratio.

I wrote the developers but they haven't replied or fixed it.
This guy works great for me on a Samsung 8.4" pro tab:

https://play.google.com/store/apps/details?id=jp.co.valsior.resizer

Has a long list of pre-set sizes and a select-your-own-size option, which like photoshop allows you to choose whether you want to maintain the aspect ratio or not.  You can choose file type and quality as well when saving.