how to reload getx controller?

Question

hi I try using Getx Controller in flutter. I want my oninit of controller reload and set the new data each time user go two my certain page, but only the first time page reload oninint excute. how can I set onInit reload each time user go to this page?

my onInit code is:

@override
Future<void> onInit() async {
  super.onInit();
  SharedPreferences sharedPreferences = await SharedPreferences.getInstance();
  name = (sharedPreferences.getString('name') ?? '-1').obs;
  avatarImage = (sharedPreferences.getString('imageAddress') ?? '-1').obs;
  username = sharedPreferences.getString('username') ?? '-1';
  file = File(avatarImage.value);
}

Answer 1

Since the controllers aren't named, I will say that we have a ReloadedController which contains the onInit() in your code snippet, and we have the SpecificPageController that belongs to that specific page.

I can think of two solutions that will suit your case:

First sulution: delete the controller and inject it again, to execute the onInit():

class SpecificPageController extends GetxController {
  @override
  void onInit() {
    Get.delete<ReloadedController>();
    Get.put(ReloadedController());
    super.onInit();
  }
}

This will delete the ReloadedController from the memory, then inject it again, this will trigger the OnInit() to execute since we just injected it.

Second solution: forcefully execute the onInit() method:

class SpecificPageController extends GetxController {
  @override
  void onInit() {
    Get.find<ReloadedController>().onInit();
    super.onInit();
  }
}

This will execute forcefully the OnInit() method, which will behave like a reload for your onInit() code every time the specific page will be opened.

Third, solution: using onGenerateRoute

return GetMaterialApp(
  onGenerateRoute: (settings) {
    if (settings.name == "/yourSpecificPageRoure") {
      name = (sharedPreferences.getString('name') ?? '-1').obs;
      avatarImage =
          (sharedPreferences.getString('imageAddress') ?? '-1').obs;
      username = sharedPreferences.getString('username') ?? '-1';
      file = File(avatarImage.value);
    }
  },
// ...

Change /yourSpecificPageRoure with your route path name.

This method is called every time a route is generated in your app, the price of your code will be executed only when the route name is /yourSpecificPageRoure.