md5 static method
计算文件的Md5, 无论文件多大都不会阻塞主线程
Implementation
static Future<String?> md5(String filePath) async {
final fileMd5Plugin = BetterFileMd5Plugin();
String? md5;
final md5Completer = Completer();
StreamSubscription subscription = fileMd5Plugin.resultStream.listen((event) {
md5 = event;
md5Completer.complete();
});
await fileMd5Plugin.fileMd5(filePath: filePath);
await md5Completer.future;
subscription.cancel();
return md5;
}