Hi@akhtar,
You can use Image.network() method to add one image in the body part. It creates a widget that displays an ImageStream obtained from the network. I have attached one example below for your reference.
var url =
      'https://raw.githubusercontent.com/nadim70/flutter/master/';
  var MyImage = Image.network(
    url,
    width: double.infinity,
    height: double.infinity,
  );
var myhome = Scaffold(
    appBar: myappBar,
    body: MyImage,
    backgroundColor: Colors.grey.shade400,
  );
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