How to grant permission Manifest.permission.MANAGE_DOCUMENTS android 6.0

Question

I want to grant the permission Manifest.permission.MANAGE_DOCUMENTS, but when I run the app, the dialog of the permission should appear but it doesn\'t. Here\'s

Answer 1

MANAGE_DOCUMENTS is a signature-level permission. Ordinary Android apps cannot hold it. Only apps that were signed by the same signing key that signed the firmware can hold it.