Project structure

Learn the roles of the lib/, android/ and ios/ folders.

Project folders

A Flutter project is split into several folders. lib/ holds your Dart source code; this is your main workspace. android/ and ios/ contain platform-specific native code and settings; you rarely touch them. test/ hosts unit tests.

ilk_uygulama/
├── lib/
│   └── main.dart
├── android/
├── ios/
├── test/
└── pubspec.yaml

pubspec.yaml sections

In pubspec.yaml the dependencies section lists packages the project needs; dev_dependencies lists packages used only during development. The environment section sets the valid Dart SDK version range. After editing, run flutter pub get to download the packages.

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.6

dev_dependencies:
  flutter_test:
    sdk: flutter

environment:
  sdk: '>=3.0.0 <4.0.0'

Exercise Print pubspec sections

In main, print two lines with print: dependencies paketler and dev_dependencies test.

Show example solution

void main() {
  print('dependencies paketler');
  print('dev_dependencies test');
}

Test yourself

Which folder holds native Android code and settings?
- src/
- lib/
- android/
- native/
Show answer

android/ — The android/ folder holds Android native code and settings; lib/ is for Dart code.
Download dependencies
```
flutter pub ____
```
Show answer
```
flutter pub get
```
Folder roles

lib/

Dart source code
android/

Android native code and settings
ios/

iOS native code and settings
test/

Unit tests

Next lesson: main and runApp

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