How to prevent my app from being closed by user in/from Recent

Question

In Phones Like Oppo and One Plus 6 some apps like Facebook and Whatsbook do not get closed from recent.

When I close all apps from recent, these 2 apps Facebook and Whatsapp remains there.

In the screenshot I have attached, we can see a lock at top right corner of facebook and whatsapp icons, but no lock on Videos Icon.

Android Version : 8.1 and above

My question is: How can I do that by code. How to prevent my app from being closed by user in/from Recent

Answer 1

You can't add this feature.

But if you wants prevent app kill from recent don't show in recent list

try excludeFromRecents (hack)

<activity
        android:name=".YourActivity"
        android:excludeFromRecents="true"/>

excludeFromRecents: Whether or not the task initiated by this activity should be excluded from the list of recently used applications, the overview screen.