apksigner failed (solved)
FYI, I just tried to sign my first APK with Qt Creator and it failed. I created the keystore and certificate pair in Qt Creator using a strong password including special characters. After searching for a solution, I discovered this bug report from an old version of Qt Creator:
I can confirm this bug still exists in Qt Creator 4.8.1 and Qt 5.12. The solution is to not use special characters in your password. Hope this helps somebody.
Since you experienced the same trouble as in the bug report you found, please update it with your information.
Can you also add the NDK/SDK versions you are using ?
You should also add the patch version of Qt 5.12 you are using.