how to change flutter version for a project

1. **Download the Flutter SDK**: Go to the Flutter website and download the Flutter SDK for your operating system (Windows, macOS, or Linux).

2. **Unzip the Flutter SDK**: Once the download is complete, unzip the Flutter SDK package to extract its contents.

3. **Place the Flutter SDK in the Desired Location**: Choose a location on your computer where you want to store the Flutter SDK files. You can place it in a folder where your other Flutter versions are stored, or any other convenient location.

4. **Open Android Studio**: Launch Android Studio, the integrated development environment (IDE) for Flutter and Android app development.

5. **Open Preferences**: To access the preferences/settings in Android Studio, you can press the keyboard shortcut `Command + Comma` on macOS or `Ctrl + Alt + S` on Windows/Linux. This will open the Preferences window.

6. **Select Flutter SDK Location**: In the Preferences window, navigate to the "Languages & Frameworks" section (or a similar named section depending on your Android Studio version) and select "Flutter". Then, locate the option to set the Flutter SDK path.

7. **Choose the Flutter SDK Folder**: Click on the option to set the Flutter SDK path and browse to the folder where you placed the Flutter SDK files in Step 3.

8. **Apply the Changes**: After selecting the Flutter SDK folder, confirm your selection and apply the changes.

By following these steps, you've successfully downloaded, installed, and configured the Flutter SDK in Android Studio, allowing you to start developing Flutter applications with ease.