- streamType
- The stream type to adjust. One of AudioManager.STREAM_VOICE_CALL, AudioManager.STREAM_SYSTEM, AudioManager.STREAM_RING, AudioManager.STREAM_MUSIC or AudioManager.STREAM_ALARM
- direction
- The direction to adjust the volume. One of AudioManager.ADJUST_LOWER, AudioManager.ADJUST_RAISE, or AudioManager.ADJUST_SAME.
- flags
- One or more flags.
Adjusts the volume of a particular stream by one step in a direction.
This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.