How to deny to access to external storage programmatically?

Question

I'm working on a privileged app with system permissions. I need to deny user access to external storage (SD card). I've used UserManager for this purpose. It works for other privileges like disallow Bluetooth configuration, Wifi configuration etc, but it doesn't work for UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA

I've used following code to access method:

MethodUtils.invokeMethod(getUserManagerStub(),"setUserRestriction",new Object[]{key,value,userId});

Answer 1

with the DevicePolicyManager there's .addUserRestriction() & .clearUserRestriction() .

this should support flags DISALLOW_MOUNT_PHYSICAL_MEDIA & DISALLOW_USB_FILE_TRANSFER .