### Configure Audio Session for Music

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Sets reasonable default audio session configurations for playing music. This is a common use case for media playback applications.

```dart
final session = await AudioSession.instance;
await session.configure(AudioSessionConfiguration.music());
```

--------------------------------

### iOS Microphone Usage Description

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Specifies the required key and string value in the `Info.plist` file for iOS applications that access the microphone. This provides a user-facing explanation for microphone usage.

```xml
<key>NSMicrophoneUsageDescription</key>
<string>... explain why the app uses the microphone here ...</string>
```

--------------------------------

### Configure Audio Session for Speech

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Sets reasonable default audio session configurations for playing podcasts or audiobooks. This is suitable for applications focused on spoken content.

```dart
final session = await AudioSession.instance;
await session.configure(AudioSessionConfiguration.speech());
```

--------------------------------

### Open Xcode Project

Source: https://github.com/ryanheise/audio_session/blob/master/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

Opens the Flutter project's Xcode workspace to manage launch screen assets. This allows for visual management of assets within Xcode.

```shell
open ios/Runner.xcworkspace
```

--------------------------------

### Configure Custom Audio Session

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Allows for a highly customized audio session configuration, specifying detailed properties for both iOS (AVAudioSession) and Android (AudioManager) platforms.

```dart
final session = await AudioSession.instance;
await session.configure(AudioSessionConfiguration(
  avAudioSessionCategory: AVAudioSessionCategory.playAndRecord,
  avAudioSessionCategoryOptions: AVAudioSessionCategoryOptions.allowBluetooth,
  avAudioSessionMode: AVAudioSessionMode.spokenAudio,
  avAudioSessionRouteSharingPolicy: AVAudioSessionRouteSharingPolicy.defaultPolicy,
  avAudioSessionSetActiveOptions: AVAudioSessionSetActiveOptions.none,
  androidAudioAttributes: const AndroidAudioAttributes(
    contentType: AndroidAudioContentType.speech,
    flags: AndroidAudioFlags.none,
    usage: AndroidAudioUsage.voiceCommunication,
  ),
  androidAudioFocusGainType: AndroidAudioFocusGainType.gain,
  androidWillPauseWhenDucked: true,
));
```

--------------------------------

### Configure SwiftPM for Audio Session Microphone

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

For Swift Package Manager, clean the Flutter project and set the `AUDIO_SESSION_MICROPHONE` environment variable before running your build command. This ensures the correct settings are picked up.

```shell
flutter clean
```

```shell
AUDIO_SESSION_MICROPHONE=1 flutter run
```

--------------------------------

### Activate Audio Session

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Activates the audio session, a prerequisite for playing or recording audio. It calls platform-specific APIs like `AVAudioSession.setActive` on iOS and `AudioManager.requestAudioFocus` on Android. The method returns `true` if activation is successful, allowing audio playback to proceed.

```dart
// Activate the audio session before playing or recording audio.
if (await session.setActive(true)) {
  // Now play or record audio.
} else {
  // The request was denied and the app should not play audio
  // e.g. a phonecall is in progress.
}
```

--------------------------------

### Configure Audio Player Interruption Handling

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Allows developers to configure how an `AudioPlayer` instance handles audio interruptions. Setting `handleInterruptions` to `false` disables the plugin's default interruption handling, enabling custom logic.

```dart
player = AudioPlayer(handleInterruptions: false);
```

--------------------------------

### Observe Device Additions and Removals

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Monitors changes in connected audio devices by listening to the `session.devicesChangedEventStream`. It logs which audio devices have been added or removed from the system.

```dart
session.devicesChangedEventStream.listen((event) {
  print('Devices added:   ${event.devicesAdded}');
  print('Devices removed: ${event.devicesRemoved}');
});
```

--------------------------------

### Configure CocoaPods for Audio Session Microphone

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Modify your `ios/Podfile` to include specific build settings for the audio session microphone. This involves adding a preprocessor definition to the target's build configurations.

```ruby
post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    
    target.build_configurations.each do |config|
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',
        'AUDIO_SESSION_MICROPHONE=1'
      ]
    end
    
  end
end
```

--------------------------------

### Listen for Android Audio Attributes Changes

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

For plugin authors, this snippet demonstrates how to listen to the `audioSession.configurationStream` to receive updates on Android-specific audio attributes. It maps configuration changes to `AndroidAudioAttributes` and applies them to an audio track via platform channel invocation.

```dart
audioSession.configurationStream
    .map((conf) => conf?.androidAudioAttributes)
    .distinct()
    .listen((attributes) {
  // apply the attributes to this Android audio track
  _channel.invokeMethod("setAudioAttributes", attributes.toJson());
});
```

--------------------------------

### Activate Audio Session

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Activates the application's shared audio session, informing the operating system that the app is actively playing audio. This is typically handled by audio plugins but can be invoked manually if needed.

```dart
// Activate the audio session before playing audio.
if (await session.setActive(true)) {
  // Now play audio.
} else {
  // The request was denied and the app should not play audio
}
```

--------------------------------

### Observe Audio Session Interruptions

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Listens to the `session.interruptionEventStream` to react to audio interruptions from other apps. It handles different interruption types like ducking or pausing, and manages resuming or unducking when the interruption ends.

```dart
session.interruptionEventStream.listen((event) {
  if (event.begin) {
    switch (event.type) {
      case AudioInterruptionType.duck:
        // Another app started playing audio and we should duck.
        break;
      case AudioInterruptionType.pause:
      case AudioInterruptionType.unknown:
        // Another app started playing audio and we should pause.
        break;
    }
  } else {
    switch (event.type) {
      case AudioInterruptionType.duck:
        // The interruption ended and we should unduck.
        break;
      case AudioInterruptionType.pause:
        // The interruption ended and we should resume.
      case AudioInterruptionType.unknown:
        // The interruption ended but we should not resume.
        break;
    }
  }
});
```

--------------------------------

### Observe Headphone Unplug Events

Source: https://github.com/ryanheise/audio_session/blob/master/README.md

Subscribes to the `session.becomingNoisyEventStream` to detect when the user unplugs headphones. This allows the application to pause audio playback or lower the volume gracefully.

```dart
session.becomingNoisyEventStream.listen((_) {
  // The user unplugged the headphones, so we should pause or lower the volume.
});
```

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