To maintain security for the system and users, Android requires apps to request permission before they can use certain system data and features. Depending on how sensitive the area is, the system may grant the permission automatically, or it may ask the user to approve the request.
Note: These permissions are Android permissions; they grant access to device features. If you're looking for Google API permissions, such as those used for interacting with Google Drive, see Google Play Services Permissions.
This section provides documentation about how your app can request permissions, and how to define your own permissions, so your app can securely share its data and features with other apps.
To get started, read Permissions Overview.