finally I've found the problem, and it seems to be solved. I have two cases:
1. When I click an URL in Gmail app, it shows a chooser, if I choose my app and "only once", it opens my activity. Then I click the banner and it shows the same chooser. No problem.
2. When I click an URL in Gmail app, it shows a chooser, if I choose my app and "always", it opens my activity. Then I click the banner and it calls again my activity. And the problem persists until I drop default values for my app.
I tried to disable the filter, but sometimes it crashes and the app gets invisible
I've finally decided to inspect the intent for an action "android.intent.action.VIEW" and an url in data starting by "
http://googleads.g.doubleclick.net", is so then I start a chooser for the same intent and finish the activity.
Now my question is, What are the urls I should test for?
Franci.