DART

save shared preferences flutter map

prefs = await SharedPreferences.getInstance();
Map<String, dynamic> selectedTimes = {
        "Pomodoro Setting": 15,
        "Rest Time Setting": 5,
        "Long Rest Time Setting": 15,
        "Term of Resting Time Setting": 5
      };
String encodedMap = json.encode(selectedTimes);
print(encodedMap);

prefs.setString('timeData', encodedMap);

store shared preferences flutter map

String encodedMap = prefs.getString('timeData');
Map<String,dynamic> decodedMap = json.decode(encodedMap);
print(decodedMap);