FX-603PX Programmable Scientific Calculator for Android

I did so because I needed to use some of the newer file management functions that are not available on the old devices. Note that when document management was introduced it came without a file selector and Google only supplied a file selector in the newer version.

In addition the HP 45 Emulator was removed from the Store for a perceived security violation in one of the very old versions. That was a bit of a surprise. Google isn't only checking the new versions for perceived security violations. They check APK versions that are in the store for 10 years demand that you fix it — or remove the old APK.

And in this particular case the perceived violation only needing a fix if your minAPI is below a certain threshold. On newer Android version the needed fix was part of the OS itself.

Needless to say that under those condition removing the old APK and increasing minAPK was the only viable option.

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PS: perceived — non of the security violation actually affected a simple calculator app.

The two I/O concepts are so different hat I had to rewrite user interface. You need to use the new Google provided file selector to get access to the files outside then app private directories.

Which, BTW, is quite a horrid user experience as the Google file selector uses mime types and doesn't allow the developer to easily define new mime types. It kind of works but badly.

Note that I prefer mime types over extensions ever since my OS/2 times but the way Google did it bings me no joy.

Speaking of Google and since this is a HP forum after all: Did you notice that the one of the two official Android emulators for the HP Prime where offline for a few a month last year? It came back online with the the update in June so you might have missed it.

My suspicion is that HP run afoul of one of Google new rules and needed the time to fix to Googles satisfaction. Just like the HP-45 emulator. Once you have been taken off it's quite a bit of work to get reinstated.

In case you wonder: You do get a warning but those warnings are automated text blocks which are not easy to understand.

Martin

Actually it is already ported as the calculator core is POJO (plain old java objects).

But I only give it away on request and as bonus for the Android users as the GUI quality is not so good.

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Kind of ugly. Not good enough to be a stand alone product. I mostly use it for debugging and testing the calculator core.