How do I modify key android app

Hello!

I decided to update an old application made in other compiler and have no more signing or signing key [SHA1: HAsisa783nms ... something like that].

I wonder how I add the old key that google me when I try to add the new app instead of new?

It is possible? And if so where in the XDK can make this trade?

Thank you !!!

you need to create your app in the xdk then google a android signing app

If you have lost the key then it is impossible to update the app. You can publish the app under a new package name...

I was imagining it!

Even so thanks!