Volume Controller #

Control and observe the system volume on Android, iOS, macOS, Windows, and Linux.

Requirements #

• Flutter >=3.44.0
• Dart ^3.12.0

The iOS plugin uses the scene lifecycle APIs introduced for Flutter plugins in Flutter 3.38.

Supported Platforms #

Notes #

• iOS volume control must be tested on a real device. The simulator does not support system volume control.
• showSystemUI is supported on Android and iOS only.
• Mute is not volume 0 on every platform:
  • Windows, macOS, Linux: system mute. Volume can stay non-zero while muted.
  • Android API 23+: STREAM_MUSIC mute (isStreamMute / ADJUST_MUTE).
  • Android API 21–22: mute sets volume to 0 and unmute restores the previous volume saved by the plugin.
  • iOS: there is no public system media mute API. isMuted() is volume == 0. setMute(true) sets volume to 0; setMute(false) restores the previous volume saved by the plugin. iOS 26 AVAudioSession.setOutputMuted is not used, because it mutes this app's audio session rather than the system volume.

Variables #

ShowSystemUI #

Show or hide the volume system UI. The default value is true. Supported on iOS and Android only.

VolumeController.instance.showSystemUI = true;

Functions #

GetVolume #

Get the current system volume.

double volume = await VolumeController.instance.getVolume();

SetVolume #

Set the system volume. The input should be in the range 0.0 to 1.0.

await VolumeController.instance.setVolume(double volume);

AddListener #

Add a listener to monitor system volume changes.

• fetchInitialVolume: Send the current volume immediately. Defaults to true.

VolumeController.instance.addListener((volume) {
  // Do something with the volume
}, fetchInitialVolume: true);

RemoveListener #

Remove the volume listener.

await VolumeController.instance.removeListener();

IsMuted #

Check whether the system is muted.

bool isMuted = await VolumeController.instance.isMuted();

SetMute #

Mute or unmute the system volume.

await VolumeController.instance.setMute(bool mute);