I am writing an app in Xamarin Forms and trying to upload an APK to HockeyApp. It is telling me that my version code must be 1 or higher. Is android:versionCode="023" valid, or does it have to start with a non-zero integer? I want something that closely resembles the release number, for example 0.2.3. Is this something that is unsupported, or is it a problem with HockeyApp?
does it have to start with a non-zero integer?
YES, it should be or studio gives error as : the leading zero turns this number into octal so removing leading zero is better way
Ex: 023 to 23 in your case
https://developer.android.com/guide/topics/manifest/manifest-element.html
For example, it could be a build number. Or you could translate a version number in "x.y" format to an integer by encoding the "x" and "y" separately in the lower and upper 16 bits. Or you could simply increase the number by one each time a new version is released.
https://developer.android.com/studio/publish/versioning.html
versionCode — An integer used as an internal version number. This number is used only to determine whether one version is more recent than another, with higher numbers indicating more recent versions.
The value is an integer so that other apps can programmatically evaluate it, for example to check an upgrade or downgrade relationship.