Can you explain what permissions mean in Android and how they are managed?

In Android, permissions are a mechanism that restricts applications' access to certain device functions or user data, such as the camera, microphone, contacts, or location.

Permission management occurs on two levels:

1. Declaration in the manifest — the app specifies which permissions it needs.
2. Request from the user at runtime — starting with Android 6.0 (Marshmallow), for dangerous permissions, the app must request permission from the user dynamically during execution.

In Flutter, plugins like permission_handler are often used to work with permissions, allowing cross-platform permission checking and requesting.

Example of using permission_handler:

import 'package:permission_handler/permission_handler.dart';

Future<void> requestCameraPermission() async {
  var status = await Permission.camera.status;
  if (!status.isGranted) {
    if (await Permission.camera.request().isGranted) {
      // Permission granted
    } else {
      // Permission denied
    }
  }
}