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正文
默認音量
frameworks\base\media\java\android\media\AudioManager.java
/** @hide Default volume index values for audio streams */
public static final int[] DEFAULT_STREAM_VOLUME = new int[] {
4, // STREAM_VOICE_CALL
7, // STREAM_SYSTEM
4, // STREAM_RING
8, // STREAM_MUSIC
4, // STREAM_ALARM
4, // STREAM_NOTIFICATION
7, // STREAM_BLUETOOTH_SCO
7, // STREAM_SYSTEM_ENFORCED
11, // STREAM_DTMF
11, // STREAM_TTS
4, // STREAM_FM
4 // STREAM_MATV
};
最大音量
frameworks\base\media\java\android\media\AudioService.java
private int[] MAX_STREAM_VOLUME = new int[] {
6, // STREAM_VOICE_CALL
7, // STREAM_SYSTEM
7, // STREAM_RING
13, // STREAM_MUSIC
7, // STREAM_ALARM
7, // STREAM_NOTIFICATION
15, // STREAM_BLUETOOTH_SCO
7, // STREAM_SYSTEM_ENFORCED
15, // STREAM_DTMF
15, // STREAM_TTS
13, //STREAM_FM
13 //stream_MATV
};