flutter creates, installs extension packages, and packages apk

1. Create APK project

To create a Flutter app in VSCode, follow these steps:

1. Install Flutter SDK: Please make sure you have installed Flutter SDK and configured the Flutter environment. You can find detailed instructions for installing and setting up Flutter on Flutter’s official website.

2. Install VSCode plug-in: Open VSCode and install the following plug-in:

   • Flutter: Provides tools and features for developing Flutter applications.
   • Dart: Provides support for the Dart language.

   To install a plug-in, please open the extension panel in VSCode (press Ctrl+Shift+Xor click the plug-in icon on the left), search for and install the above plug-in.

3. Create a Flutter project: In VSCode, press Ctrl+Shift+P(or click the "View" menu in the upper left corner, and then select "Command Palette") to open the command palette. In the command palette, enter " Flutter: New Project " and select the command.

   Next, select the project's directory and enter a name for the project. VSCode will automatically create a new Flutter project and open the project folder in the editor.

4. Write code: In the editor of VSCode, open lib/main.dartthe file, which is the entry file of the Flutter application. This is where you code your Flutter app.

5. Run your application: Press F5the key or click the "Run and Debug" button (the bug icon with a play button) on the left side of VSCode to run your application. You can choose the device (such as an emulator or a connected device) on which your application will run.

   VSCode will launch the app and run your Flutter app on the selected device.

2. Add the extension package to the flutter project

1. pubspec.yamlAdded to the files of the Flutter project .
2. 
3. After saving the file, run flutter pub getthe command to get the dependencies. This will download and install url_launcherthe plugin so you can use it in your project.

3. Package into APK 

• Make sure you have installed the Flutter SDK and configured the Flutter environment. You can find detailed instructions for installing and setting up Flutter on Flutter’s official website.

• In the root directory of your Flutter project, open a terminal or command line window.

• Run the following command to check if your Flutter project can build and run:

flutter doctor

• If there are any errors or warnings, fix them based on the output information.

• Make sure you have an Android device or emulator connected.

• In a terminal or command line window, navigate to your Flutter project root directory.

• Run the following command to build the APK file of your Android application:

flutter build apk

build/app/outputs/apkThis will generate an APK file named in the directory of your Flutter project app-release.apk.

If you want to build an APK file for debugging, you can run the following command:

flutter build apk --debug

1. Once the build is complete, you can navigate to the path to the generated APK file in File Explorer and copy it to your Android device for installation. Alternatively, you can use tools such as Android Studio to install and run the APK file.

Please note that the commands mentioned in the above steps flutter build apkare used to build the APK file of the Android application. If you want to build an iOS app, you need to use Xcode on a Mac to build and deploy.