Android Question API 8 API 18 Compile install/uninstall compatibility?

[beni_feld]

I have an App compiled under API-8 installed on Android 3.2.6 phone .
I recompiled the app under api-18 and tried to replace the existing app. I received a message "Replace existing application" but immediately followed by a message "Application not found", and replace failed.
Only after manually removing the installed app the new compiled version could be installed. The newly installed App can be replaced later without any problem.
The same problem has been observed in other installed applications compiled under API 8

Mentioned problem makes it difficult to perform automatic software update (at least for the first time).
Is this a known compatibility problem?

BN

 

[Erel]

This is most probably not related to the referenced API but rather to a change in the sign key or a lower version code.

 

[beni_feld]

This is most probably not related to the referenced API but rather to a change in the sign key or a lower version code.

Thank you Erel.
I changed the sign key in order to create an API project for the Google maps demo but did not realize that it will affect all the recompiled applications.

 

[Erel]

Android doesn't allow you to replace an existing app signed with a different key (for security reasons). When you compile with a USB connection then you will see a message asking you whether you want to replace the app. This is however not possible with other installation methods such as B4A-Bridge.

 

[beni_feld]

Thanks for the detailed explanation
BN