Dart (Flutter) Future

Question

I need to know whether or not the file exists in the folder, but I get an instance of Future<bool>, how do I get the false or true?

for (String curFile in splittedList){
  Future<bool> t2 = Future.value(File(curFile).exists());
  print("$curFile - $t2");
}

result

I/flutter (16852): assets/images/Symbol/4.svg - Instance of 'Future<bool>'

Greed · Answer 1 · 2022-04-18T16:44:04.463

0

var t2 = await File('...').exists()

hope it helpful.

EDIT -----

try this

  Future<bool> checkAssets(String key) async {
    bool result = true;
    try {
      await rootBundle.load(key);
    } catch (e) {
      result = false;
    }
    return result;
  }

edited Apr 18 '22 at 16:44

answered Apr 18 '22 at 14:24

Greed

21
2

Is there any way without using await? final t2 = File(curFile).existsSync(); print("$curFile - $t2"); only return false – Maykon Luiz Matos Araujo Apr 18 '22 at 14:31
test(String path) async { var result = await File(path).exists(); print("$path - $result"); return result; } return only false – Maykon Luiz Matos Araujo Apr 18 '22 at 14:50
I edited the answer. pls try and see if it works. I didnt found any documentation but File usually be used to load files in device, not project dir. – Greed Apr 18 '22 at 16:45
It didn't work, I'm using the same path I put in pubspec.yaml, assets/images/Symbol/g.svg, is there another way to find it on the device? – Maykon Luiz Matos Araujo Apr 18 '22 at 19:17

Dart (Flutter) Future

1 Answers1