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Enum for Audio Usage Types Each value determines a different usage type of the playback stream. The usage type affects:
  • Audio focus behavior (priority, ducking)
  • Volume curve mapping
  • Routing decisions
  • Interaction with other audio streams

Possible Mappings

Notes:
  • Higher priority audio usage types can interrupt lower priority ones
  • When interrupted, streams can be:
    • Ducked (volume reduced)
    • Paused
    • Stopped
    • Released
  • Focus can be explicitly managed using AudioFocusSession

Enumeration Members

USAGE_NONE

USAGE_NONE: 0

USAGE_MEDIA

USAGE_MEDIA: 1

USAGE_COMMUNICATION

USAGE_COMMUNICATION: 2

USAGE_ALARM

USAGE_ALARM: 3

USAGE_NOTIFICATION

USAGE_NOTIFICATION: 4

USAGE_ACCESSIBILITY

USAGE_ACCESSIBILITY: 5

USAGE_ANNOUNCEMENT

USAGE_ANNOUNCEMENT: 6

USAGE_NAVIGATION

USAGE_NAVIGATION: 7

USAGE_RING

USAGE_RING: 8

USAGE_VOICE_ASSISTANT

USAGE_VOICE_ASSISTANT: 9

USAGE_SYSTEM

USAGE_SYSTEM: 10

USAGE_VOICE_RECOGNITION

USAGE_VOICE_RECOGNITION: 11

USAGE_VOICE_PROMPT

USAGE_VOICE_PROMPT: 12

USAGE_SPOKEN_WORD_CONTENT

USAGE_SPOKEN_WORD_CONTENT: 13

USAGE_TEXT_READER

USAGE_TEXT_READER: 14

USAGE_FLASH_BRIEFING

USAGE_FLASH_BRIEFING: 15
最后修改于 2026年8月25日