Can't update android package: "Application not installed"

[plague-doctor]

• KOReader version: 2020.04
• Device: Boox

Issue

Cannot install latest (2020.04) release koreader-android-arm-v2020.04.apk.
Installation is failing with "Application not installed".
Never had a single problem with earlier versions. Can you double check if the build is really for arm architecture?

[pazos]

Yeah, build works fine. It is using the same signature since the first android package

Please check you're not using the F-droid build in menu -> help -> bug report and you have 50MB of storage available

[plague-doctor]

Hmmm... I had to uninstall 2020.03 and now I could install 2020.04... Strange.
Yes, I had plenty of space. Way more than 50MB.

[Frenzie]

Android's very vague about the reason, could be that we accidentally made the version identifier a downgrade by messing with it.

[pbienst]

Similar issue here on a Samsung phone with plenty of storage...

[pazos]

could be that we accidentally made the version identifier a downgrade by messing with it.

@Frenzie: thanks, I forgot that!

[mabier]

Yes, I have to uninstall the old version then installation can be successfully made !

[cges30901]

I also have to uninstall old version to install new version.

could be that we accidentally made the version identifier a downgrade by messing with it.

versionCode of v2020.04 is 7401, and versionCode of v2020.03.2 is 17365. Maybe this is the reason?

[Frenzie]

That's what I was referring to, yes. If you use ADB or Android Studio/AVD then it'll tell you the actual reason. A regular user will be stuck with Android's philosophy that a vague error message is the way to go.