L版 系统默认音量和最大音量

路径：frameworks\base\media\java\android\media\AudioService.java

 

/** @hide Maximum volume index values for audio streams */
   /// M: Modify the max stream volume @{
    private static final int[] MAX_STREAM_VOLUME = new int[] {
        6,  // 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
    };
    /// @}

    /**
     * @hide Default volume index values for audio streams
     * M: modify the default stream volume @{
     */
    public static int[] DEFAULT_STREAM_VOLUME = new int[] {
        4,  // STREAM_VOICE_CALL
        15,  // STREAM_SYSTEM
        8,  // STREAM_RING
        8, // STREAM_MUSIC
        8,  // STREAM_ALARM
        8,  // STREAM_NOTIFICATION
        7,  // STREAM_BLUETOOTH_SCO
        15,  // STREAM_SYSTEM_ENFORCED
        11, // STREAM_DTMF
        11,  // STREAM_TTS
    };
    /** @ */