Android Mute and un-mute system volume

At basic level, below two code snippets can do this.

public static void unmuteSystemAudio()

    {

        try

        {

            AudioManager audio = (AudioManager) getAppContext().getSystemService(Context.AUDIO_SERVICE); audio.setRingerMode(AudioManager.RINGER_MODE_NORMAL);

        }

        catch (Exception ex)

        {

            Utils.log("Exception while unmutting system audio");

            ex.printStackTrace();

        }

    }

    

    public static void muteSystemAudio()

    {

        try

        {

            AudioManager audio = (AudioManager) getAppContext().getSystemService(Context.AUDIO_SERVICE); audio.setRingerMode(AudioManager.RINGER_MODE_SILENT);

        }

        catch (Exception ex)

        {

            Utils.log("Exception while muting system audio");

            ex.printStackTrace();

        }

    }

references
http://developer.android.com/reference/android/media/AudioManager.html