How to override gradient color parameter of Container widget with color parameter

Question

I have used gradient parameter of a Container widget which shows gradient color only if the condition is true if not gradient color is transparent.

Excepted Output : -

If the condition is false then Container widget could be colored by the color passed in the color parameter. In the below code, it is green.

Excepted Output Image : -

Actual Output : -

Transparent gradient color overrides the color given to the color parameter

Actual Output Image : -

Note : - color parameter can have different colors since it also depends on some Boolean flags hence setting the same color to the gradient parameter won't work.

Code : -

import 'package:flutter/material.dart';

void main() => runApp(const ExampleApp());

class ExampleApp extends StatefulWidget {
  const ExampleApp({Key? key}) : super(key: key);

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  bool showGradient = false;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          body: Center(
        child: Container(
          decoration: BoxDecoration(
              gradient: LinearGradient(colors: [
                showGradient ? Colors.blue : Colors.transparent,
                showGradient ? Colors.orange : Colors.transparent,
              ]),
              color: Colors.green[100],
              border: Border.all()),
          height: 100,
          width: 100,
        ),
      )),
    );
  }
}

Answer 1

Try instead of

          gradient: LinearGradient(colors: [
            showGradient ? Colors.blue : Colors.transparent,
            showGradient ? Colors.orange : Colors.transparent,
          ]),

do

          gradient: showGradient ? LinearGradient(colors: [
            Colors.blue,
            Colors.orange
          ]) : null,