How do I tell when a NetworkImage has finished loading?

Question

I have a NetworkImage and I\'d like to know when it\'s finished loading. How do I do that?

Answer 1

I find this method in flutter official demo，wish help you.

import 'dart:async';
import 'package:flutter/material.dart';

void _imageLoad() async {

    String imageName = "";

    Image downloadImage = new Image.network(imageName);

    final ImageStream stream = downloadImage.image.resolve(ImageConfiguration.empty);
    final Completer completer = Completer();
    stream.addListener((ImageInfo info, bool syncCall) => completer.complete());
    await completer.future;
    if (mounted) {
      //do sth
    }
}