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SDK and setup

Learn to download, install and add Flutter SDK to PATH.

Flutter SDK

The Flutter SDK is the package containing the command-line tools, the Dart compiler and the framework libraries needed to build Flutter apps. You download it from the official site and extract it into a folder. To run flutter from anywhere, you add the SDK's bin directory to your operating system's PATH variable.

# Linux/macOS temporary PATH
export PATH="$PATH:`pwd`/flutter/bin"

# Verify the install
flutter --version

Installation steps

In order: download the SDK, extract the archive, add the bin directory to PATH and restart the terminal. Then verify with flutter --version. If PATH is not set correctly you get flutter: command not found.

# Make PATH permanent (bash)
echo 'export PATH="$PATH:$HOME/flutter/bin"' >> ~/.bashrc
source ~/.bashrc

flutter --version

Practice Print the setup steps

In main, print three lines in order with print: 1 indirme, 2 kurulum, 3 doctor.

Starter code

main.dart
void main() {
  // sırayla üç kurulum adımını print ile yazdır:
  // 1 indirme
  // 2 kurulum
  // 3 doctor

}

Sample solution

main.dart
void main() {
  print('1 indirme');
  print('2 kurulum');
  print('3 doctor');
}

Expected output

1 indirme
2 kurulum
3 doctor

Questions and answers

Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.

1 What is needed to run flutter from any directory on the command line?

  • Install Android Studio
  • Install Flutter in the root directory
  • Run it with administrator privileges
  • Add the SDK's bin directory to PATH Correct answer

Explanation: PATH is the list of directories the shell searches for commands; without bin, flutter works only by full path.

2 Verify the flutter command

Question 
flutter ____
Answer 
flutter --version

Explanation: The flutter --version command shows whether the SDK is installed.

3 Installation concepts

Term Meaning
Flutter SDK Development tools and framework package
bin dizini Location added to PATH
PATH List of directories searched for commands
flutter --version Command to verify installation

All lessons in Beginner

1 Intro to Flutter

  1. What is Flutter?
  2. Dart and Flutter
  3. SDK and setup
  4. flutter doctor
  5. Summary - Flutter setup

2 First app

  1. flutter create
  2. Project structure
  3. main and runApp
  4. Hot reload
  5. Summary - First app

3 Widget basics

  1. What is a widget?
  2. Widget tree
  3. BuildContext
  4. Material and Cupertino
  5. Summary - Widget basics

4 StatelessWidget

  1. What is StatelessWidget?
  2. The build method
  3. Passing parameters
  4. const constructor
  5. Summary - StatelessWidget

5 StatefulWidget

  1. What is StatefulWidget?
  2. createState and State
  3. The setState method
  4. initState and dispose
  5. Summary - StatefulWidget

6 Text and Container

  1. The Text widget
  2. TextStyle
  3. Container
  4. BoxDecoration
  5. Summary - Text and Container

7 Column and Row

  1. Column
  2. Row
  3. MainAxisAlignment
  4. CrossAxisAlignment
  5. Summary - Column and Row

8 Padding and margin

  1. The Padding widget
  2. EdgeInsets
  3. Container margin
  4. Spacing strategy
  5. Summary - Padding and margin

9 SizedBox and Center

  1. SizedBox
  2. The Center widget
  3. SizedBox.expand
  4. The Align widget
  5. Summary - SizedBox and Center

10 ListView

  1. What is ListView?
  2. ListView.builder
  3. ListTile
  4. Separator
  5. Summary - ListView

11 GestureDetector

  1. What is GestureDetector?
  2. onTap and onDoubleTap
  3. onLongPress
  4. onHorizontalDragUpdate
  5. Summary - GestureDetector

12 InkWell

  1. What is InkWell?
  2. InkWell vs GestureDetector
  3. Material parent
  4. onTap callback
  5. Summary - InkWell

13 ElevatedButton

  1. What is ElevatedButton?
  2. onPressed and child
  3. TextButton and OutlinedButton
  4. Button style
  5. Summary - ElevatedButton

14 TextFormField

  1. What is TextFormField?
  2. TextEditingController
  3. decoration and label
  4. obscureText
  5. Summary - TextFormField

15 Todo app

  1. Project skeleton
  2. Add screen
  3. List and onTap
  4. Delete and divider
  5. Summary - Todo app

16 Images

  1. AssetImage
  2. Image.network
  3. Image.file
  4. fit and size
  5. Summary - Images

17 Scaffold and AppBar

  1. What is Scaffold?
  2. AppBar
  3. FloatingActionButton
  4. Drawer
  5. Summary - Scaffold and AppBar

18 Navigator

  1. What is Navigator?
  2. Navigator.push
  3. MaterialPageRoute
  4. Navigator.pop
  5. Summary - Navigator

19 Counter app

  1. Project skeleton
  2. State and counter
  3. Increment button
  4. Decrement button
  5. Summary - Counter app

20 Beginner final

  1. Challenge 1
  2. Challenge 2
  3. Challenge 3
  4. Challenge 4