android 默认系统音量定义
16lz
2021-12-04
OS:MTK 8.1
1.音量最大值
- frameworks/base/services/core/java/come/android/server/audio/AudioService.java
/** @hide Maximum volume index values for audio streams */ private int[] MAX_STREAM_VOLUME = new int[] { 7, // STREAM_VOICE_CALL 15, // STREAM_SYSTEM 15, // STREAM_RING 15, // STREAM_MUSIC 15, // STREAM_ALARM 15, // STREAM_NOTIFICATION 15, // STREAM_BLUETOOTH_SCO 15, // STREAM_SYSTEM_ENFORCED 15, // STREAM_DTMF 15, // STREAM_TTS };
2.音量最小值
/** @hide Minimum volume index values for audio streams */ private int[] MIN_STREAM_VOLUME = new int[] { 1, // STREAM_VOICE_CALL 0, // STREAM_SYSTEM 0, // STREAM_RING 0, // STREAM_MUSIC 0, // STREAM_ALARM 0, // STREAM_NOTIFICATION 0, // STREAM_BLUETOOTH_SCO 0, // STREAM_SYSTEM_ENFORCED 0, // STREAM_DTMF 0, // STREAM_TTS };
3.音量默认值
- frameworks/base/media/java/android/media/AudioSystem.java
/** default volume index values for audio streams */ private int[] DEFAULT_STREAM_VOLUME = new int[] { 4, // STREAM_VOICE_CALL 7, // STREAM_SYSTEM 5, // STREAM_RING 11, // STREAM_MUSIC 6, // STREAM_ALARM 5, // STREAM_NOTIFICATION 7, // STREAM_BLUETOOTH_SCO 7, // STREAM_SYSTEM_ENFORCED 11, // STREAM_DTMF 11, // STREAM_TTS };
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