showDialog(

            context: context,

            child: new AlertDialog(

              title: const Text("Location disabled"),

              content: const Text(

                  """

Location is disabled on this device. Please enable it and try again.

                  """),

              actions: [

                new FlatButton(

                  child: const Text("Ok"),

                  onPressed: _dismissDialog,

                ),

              ],

            ),

        );