networkIMage.dart

import 'dart:ui' as ui;
import 'package:flutter/rendering.dart';
import 'dart:async';
import 'dart:typed_data';
import 'package:flutter/material.dart';


Future<ui.Image> getImageFromPath(String imagePath) async {
  final netImage = NetworkImage(imagePath);
  final Completer<ui.Image> mainCompleter = Completer();
  netImage.load(netImage, (Uint8List bytes,
      {int cacheWidth, int cacheHeight}) async {
    final Completer<ui.Image> completer = new Completer();

    ui.decodeImageFromList(bytes, (ui.Image img) {
      return completer.complete(img);
    });
    mainCompleter.complete(completer.future);
    return await ui.instantiateImageCodec(bytes);
  });

  return mainCompleter.future;
}