Image.network(String src, { Key key, double scale: 1.0, double width, double height, Color color, ImageFit fit, FractionalOffset alignment, ImageRepeat repeat: ImageRepeat.noRepeat, Rect centerSlice, bool gaplessPlayback: false })

Creates a widget that displays an ImageStream obtained from the network.

The src, scale, and repeat arguments must not be null.

Source 

Image.network(String src, {
  Key key,
  double scale: 1.0,
  this.width,
  this.height,
  this.color,
  this.fit,
  this.alignment,
  this.repeat: ImageRepeat.noRepeat,
  this.centerSlice,
  this.gaplessPlayback: false
}) : image = new NetworkImage(src, scale: scale),
     super(key: key);