Android Question How to create floating panel?

[bjf]

I am making a custom "caller id"-app wich will display a simple message with the name of the caller if it's a call from our own company.

I am using the Customtoast library in testing, but it off course only displays the toastmessage if the app is active.
How could i create an object that will pop up in front of all other apps on incoming call?

I have the triggering part worked out but need a pointer towards the right object to display the result in.

 

[Erel]

You can create a transparent activity with a panel and then show it with StartActivity: https://www.b4x.com/android/forum/threads/transparent-activities-in-project.41501/#post-249673