Problem with the Flutter app when resizing

Question

I have trouble designing a flutter program.
When I run the program, and resize the program, everything breaks down and is not normal.

You can see in the picture below.

Answer 1

Use MediaQuery to make it responsive on different screen sizes

    Container(
      color: Colors.red,
      width: MediaQuery.of(context).size.width,
      child: Text(
        'Always full width container',
      ),
    ),