如何从Future对象中获取原始值（未来 <int> ）扑朔迷离？

Question

I am getting Future instance while getting sharedPreference value as follows

 Future<int>  getCounterValue() async{
    SharedPreferences preferences= await SharedPreferences.getInstance();
    return preferences.getInt("counter") ;
   }

Then I want to get int value from that Future instance. Please help thanks in advance.

Answer 1

There is no way to get back from async execution to sync execution.

You can only get the value by using await or .then((param) { print(param); })

You would need to provide more context to make a concrete suggestion about how to solve your actual problem.

Answer 2

For non-async method:

void methodSync() {
  getCounterValue().then(
    (value){
      // do something with value
      print(value);
    }
  );
}

For async method:

void methodAsync() async{
  int value = await getCounterValue();
  // do something with value
  print(value);
}