Installed android permission plugin but still not working in Ionic 3

Ionic Framework ionic-v3
1

Installed android permission plugin

this.androidPermissions.checkPermission(this.androidPermissions.PERMISSION.LOCATION_HARDWARE).then(
        success =>console.log('Permission granted'),
        err => this.androidPermissions.requestPermission(this.androidPermissions.PERMISSION.LOCATION_HARDWARE)
      );

      this.androidPermissions.checkPermission(this.androidPermissions.PERMISSION.BLUETOOTH).then(
        success => console.log('Permission granted'),
        err => this.androidPermissions.requestPermission(this.androidPermissions.PERMISSION.BLUETOOTH)
      );

it is displaying ‘’'permisssion granted ‘’'
but when I checked in app info no permission is allowed