Why deployment reaches users in Flutter - Build It to Prove It

Build: Deployment Explanation

This screen explains why app deployment reaches users in simple terms.

Target UI

-------------------------
| Deployment Explanation |
-------------------------
|                       |
| Why does deployment   |
| reach users?          |
|                       |
| [Show Explanation]    |
|                       |
-------------------------

Display a title at the top

Show a question: 'Why does deployment reach users?'

Add a button labeled 'Show Explanation'

When the button is tapped, show a short explanation text below the button

Starter Code

Flutter

import 'package:flutter/material.dart';

class DeploymentExplanationScreen extends StatefulWidget {
  @override
  State<DeploymentExplanationScreen> createState() => _DeploymentExplanationScreenState();
}

class _DeploymentExplanationScreenState extends State<DeploymentExplanationScreen> {
  bool _showExplanation = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Deployment Explanation'),
      ),
      body: Padding(
        padding: EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text('Why does deployment reach users?', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () {
                // TODO: Add code to show explanation
              },
              child: Text('Show Explanation'),
            ),
            SizedBox(height: 20),
            // TODO: Show explanation text here when button is tapped
          ],
        ),
      ),
    );
  }
}

Task 1

Task 2

Solution

Flutter

import 'package:flutter/material.dart';

class DeploymentExplanationScreen extends StatefulWidget {
  @override
  State<DeploymentExplanationScreen> createState() => _DeploymentExplanationScreenState();
}

class _DeploymentExplanationScreenState extends State<DeploymentExplanationScreen> {
  bool _showExplanation = false;

  void _toggleExplanation() {
    setState(() {
      _showExplanation = !_showExplanation;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Deployment Explanation'),
      ),
      body: Padding(
        padding: EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text('Why does deployment reach users?', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: _toggleExplanation,
              child: Text('Show Explanation'),
            ),
            SizedBox(height: 20),
            if (_showExplanation)
              Text(
                'When developers deploy an app, it is sent to app stores or servers. Users download or update the app from there, so deployment makes the app available to users.',
                style: TextStyle(fontSize: 16),
              ),
          ],
        ),
      ),
    );
  }
}

This screen uses a button to show or hide a simple explanation about deployment. When the user taps the button, the app updates its state to show the explanation text below. This helps users understand that deployment means sending the app to places where users can get it, like app stores.

We use a boolean variable _showExplanation to track if the explanation is visible. The setState method updates the UI when the button is pressed.

Final Result

Completed Screen

-------------------------
| Deployment Explanation |
-------------------------
|                       |
| Why does deployment   |
| reach users?          |
|                       |
| [Show Explanation]    |
|                       |
| When developers deploy|
| an app, it is sent to|
| app stores or servers.|
| Users download or     |
| update the app from   |
| there, so deployment  |
| makes the app         |
| available to users.   |
-------------------------

User taps 'Show Explanation' button

Explanation text appears below the button

Tapping the button again hides the explanation

Stretch Goal

Add a toggle to switch between light and dark mode for the screen.

💡 Hint

Use Flutter's ThemeMode and a switch widget to let users change the theme dynamically.