[移动开发]Android 默认音量调整

系统默认音量代码位置
frameworks/base/media/java/android/media/AudioSystem.java
DEFAULT_STREAM_VOLUME 数组

    public static 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
    };
以上为系统初始默认音量



抓取当前音量，加大到系统设定最大音量
platform:/ #logcat -c;logcat -s vol.Events
--------- beginning of main
01-01 01:05:59.157  4619  4721 I vol.Events: writeEvent level_changed STREAM_MUSIC 10
01-01 01:05:59.157  4619  4721 I vol.Events: writeEvent active_stream_changed STREAM_MUSIC
01-01 01:05:59.162  4619  4721 I vol.Events: writeEvent key STREAM_MUSIC 10
01-01 01:05:59.177  4619  4619 I vol.Events: writeEvent show_dialog volume_changed keyguard=false
01-01 01:06:00.665  4619  4619 I vol.Events: writ

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