Android Question Start activity on the lock screen

[HassanProgrammer]

You must have seen many times that in WhatsApp, someone calls us and our phone screen turns on and the call activity is started!
I want to implement exactly this feature in my program. (The user's phone may or may not be locked ...)
please guide me.
Thankful

 

[Erel]

Starting from Android 10, only apps with the draw over apps special permission can start activities from the background.
You can request this permission: https://www.b4x.com/search?query=targetSdkVersion

Another option is to use the full screen intent: https://developer.android.com/training/notify-user/time-sensitive
It will require some Java knowledge.

 

[HassanProgrammer]

Starting from Android 10, only apps with the draw over apps special permission can start activities from the background.
You can request this permission: https://www.b4x.com/search?query=targetSdkVersion

Another option is to use the full screen intent: https://developer.android.com/training/notify-user/time-sensitive
It will require some Java knowledge.

Thank you for your answer.
This is a bit vague for me. Can you explain a little more accurately?