Flutterflow | Common Functions

Here you will find every common function used along the projects, avoid reinventing the wheel, that's why we have this guide here

Convert String Into Currency Format

When you have a currency textfield input, make sure to use it inside of the On Change action, with 0 ms of delay, to update the same textfield

import 'dart:convert';
import 'dart:math' as math;
 
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:intl/intl.dart';
import 'package:timeago/timeago.dart' as timeago;
import '/flutter_flow/custom_functions.dart';
import '/flutter_flow/lat_lng.dart';
import '/flutter_flow/place.dart';
import '/flutter_flow/uploaded_file.dart';
import '/backend/schema/structs/index.dart';
import '/backend/schema/enums/enums.dart';
import '/auth/custom_auth/auth_util.dart';
 
String convertStringIntoCurrencyFormat(String input) {
  /// MODIFY CODE ONLY BELOW THIS LINE
 
  // remove all non numeric characters, leave only numbers and format as US currency
  String result = input.replaceAll(RegExp(r'[^0-9]'), '');
  if (result.isEmpty) {
    return '\$0.00';
  }
  int cents = int.parse(result);
  double dollars = cents / 100.0;
  final formatter = NumberFormat.currency(locale: 'en_US', symbol: '');
  return formatter.format(dollars);
 
  /// MODIFY CODE ONLY ABOVE THIS LINE
}

Check Internet Connection Async

Make sure to call the function on the "Final Actions" on main.dart

import '/custom_code/actions/index.dart' as actions;
import 'package:provider/provider.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
 
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_web_plugins/url_strategy.dart';
 
import 'auth/custom_auth/auth_util.dart';
import 'auth/custom_auth/custom_auth_user_provider.dart';
 
import '/flutter_flow/flutter_flow_theme.dart';
import 'flutter_flow/flutter_flow_util.dart';
import 'flutter_flow/internationalization.dart';
import 'flutter_flow/nav/nav.dart';
import 'index.dart';
 
void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  GoRouter.optionURLReflectsImperativeAPIs = true;
  usePathUrlStrategy();
 
  await authManager.initialize();
 
  final appState = FFAppState(); // Initialize FFAppState
  await appState.initializePersistedState();
 
  // Start final custom actions code
  await actions.checkInternetConnection();
  // End final custom actions code
 
  runApp(ChangeNotifierProvider(
    create: (context) => appState,
    child: MyApp(),
  ));
}

Function

// Automatic FlutterFlow imports
import '/backend/schema/structs/index.dart';
import '/backend/schema/enums/enums.dart';
import '/actions/actions.dart' as action_blocks;
import '/flutter_flow/flutter_flow_theme.dart';
import '/flutter_flow/flutter_flow_util.dart';
import '/custom_code/actions/index.dart'; // Imports other custom actions
import '/flutter_flow/custom_functions.dart'; // Imports custom functions
import 'package:flutter/material.dart';
// Begin custom action code
// DO NOT REMOVE OR MODIFY THE CODE ABOVE!
 
import 'package:connectivity_plus/connectivity_plus.dart';
import 'dart:async';
 
Future checkInternetConnection() async {
  // Add your function code here!
  StreamSubscription<ConnectivityResult>? subscription;
  subscription = Connectivity()
      .onConnectivityChanged
      .listen((ConnectivityResult result) async {
    // Got a new connectivity status!
    bool hasConnection = false;
    if (result == ConnectivityResult.mobile ||
        result == ConnectivityResult.wifi ||
        result == ConnectivityResult.ethernet ||
        result == ConnectivityResult.vpn ||
        result == ConnectivityResult.other) {
      hasConnection = true;
    }
    FFAppState().update(() {
      FFAppState().hasInternet = hasConnection;
    });
    FFAppState().notifyListeners();
  });
}