我正在尝试从检索地图的 api 调用中获取数据,我能够从 api 获取地图以显示我想要的方式,但是它反复调用 api 意味着列表不断刷新。即使我尝试将侦听器设置为 false,它也可以工作,但我必须手动刷新应用程序才能工作?
附加信息:分配和检索数据
import 'package:http/http.dart' as http;
class Stores with ChangeNotifier {
var s_length;
Future<List<Store>> getStores(String storeCatName) async {
final queryParameters = {
"store_category_name": storeCatName,
};
try {
//TODO this is the issue - must fix.
final uri = Uri.http("url", 'url', queryParameters);
//print(uri);
final response = await http.get(uri);
//print(response.statusCode);
//print(response.body);
if (response.statusCode == 200) {
final List<Store> stores = storeFromJson(response.body);
_stores = stores;
//print(_stores);
print("lenght: ${_stores.length}");
Store store;
for(store in _stores) {
store.products = Products().products(store.storeId);
}
//check if this is correct
notifyListeners();
//return stores;
} else {
print("error1");
return List<Store>();
}
} catch (e) {
print(e.toString());
return List<Store>();
}
//notifyListeners();
print(_stores);
}
List<Store> get favoriteItems {
//return _stores.where((storeItem) => storeItem.isFavorite).toList();
}
bool isNotFull(){
if (_stores.isEmpty){
return true;
} else {
return false;
}
}
int get numberOfStores{
return s_length;
}
List<Store> _stores = [];
List<Store> stores (String storeCatName){
getStores(storeCatName);
//print("cpp; + $s_length");
//notifyListeners();
return _stores;
}
}
final storesProvider = Provider.of<Stores>(
context, listen: false
);
storesProvider.getStores(categoryName);
final providerStoreList = storesProvider.stores(category.storeCategoryName);
附加信息:列表生成器:
child: ListView.builder(
itemCount: providerStoreList.length,
itemBuilder: (context, index) => ChangeNotifierProvider.value(
value: providerStoreList[index],
child: StoreItem(),
)));
如果需要任何其他信息,请告诉我。任何帮助将不胜感激。
谢谢