Reboot mobile programmatically

Hi team i created flutter project and my task is if i press the restart button mobile device need to got restarted but if i press the button it wont works got error in console

error -> either user 10478 nor current process has android.permission.REBOOT

android code for restart

  private void restart() {
        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
        pm.reboot(null);
    }

I have added the permission in androidmanifest too, but no luck.

do I need to restart my device?

1

<uses-permission android:name="android.permission.REBOOT" />

2

import 'package:permission_handler/permission_handler.dart';

void requestRebootPermission() async {
  var status = await Permission.reboot.request();
  if (status != PermissionStatus.granted) {
    print('Permission denied');
    return;
  }
}

3

await requestRebootPermission();
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
pm.reboot(null);