How to save firebase in shared_preferences-CodePudding

Hello I want to save name of Category in my application in shared_preferences that the name come from firebase

that the code of how I get my category

the idea of program that the user only use on category not all of them

in the first the user will chose the category I have to save the Category in the app that come from firebase

 final CollectionReference _categoryCollectionRef =
      FirebaseFirestore.instance.collection('Country');

Future<List<QueryDocumentSnapshot>> getCategory() async {
    var value = await _categoryCollectionRef.get();
    return value.docs;
  }

getCategory() async {
    _loading.value = true;
    await HomeService().getCategory().then((value) => {
          for (int i = 0; i < value.length; i  )
            {
              _categoryModel.add(CategoryModel.fromJson(
                  value[i].data() as Map<String, dynamic>)),
              _loading.value = false,
            },
          update(),
        });
  }

that the button I call it my function

GestureDetector(
              onTap: () async {
                Get.off(
                  ControlView(),
                );
              },
              child: Container(
                decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(15), color: primary),
                height: 50,
                child: CustomText(
                  alignment: Alignment.center,
                  text: controller.categoryModel[index].name,
                ),
              ),
            );

CodePudding user response：

You can use shared_preferences and do like this:

final prefs = await SharedPreferences.getInstance().reload();
prefs.setString('uniquekey', 'name of Category');

in your case:

    onTap: () async {
        final prefs = await SharedPreferences.getInstance().reload();
        prefs.setString('categoryName', controller.categoryModel[index].name);

        Get.off(
          ControlView(),
        );
    },

and read it like this:

final prefs = await SharedPreferences.getInstance().reload();
String result = prefs.get('categoryName');
if(result != null){
  print(result);
}