Sadly, now we can no more map our apps to Long press home button Event. But, There is a settings page where it is possible to change the default device assistance app: Default Device Assistance app on Samsung
Is it anyway possible to change the default device assistance app programmatically or even launch the settings page (via intent) to make the user change the setting?
Is it anyway possible to change the default device assistance app programmatically
Fortunately, no, for blindingly obvious privacy and security reasons.
even launch the settings page (via intent) to make the user change the setting?
Ideally, there would be an action in Settings for this, but I do not see one that looks like it is specific to the assistant.
