Android 获取系统音量

关于Android获取系统音量值的文章在网上随便一搜就一大堆，我在此再整理只是为了更方便与学习，相当于做笔记吧。

                    AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);                    max = am.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL);// 0                    current= am.getStreamVolume(AudioManager.STREAM_VOICE_CALL);                    Log.e("service", "通话音量值：" + max + "-" + current);                    max = am.getStreamMaxVolume(AudioManager.STREAM_SYSTEM);// 1                    current = am.getStreamVolume(AudioManager.STREAM_SYSTEM);                    Log.e("service", "系统音量值：" + max + "-" + current);                    max = am.getStreamMaxVolume(AudioManager.STREAM_RING);// 2                    current = am.getStreamVolume(AudioManager.STREAM_RING);                    Log.e("service", "系统铃声值：" + max + "-" + current);                    max = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC);// 3                    current = am.getStreamVolume(AudioManager.STREAM_MUSIC);                    Log.e("service", "音乐音量值：" + max + "-" + current);                    max = am.getStreamMaxVolume(AudioManager.STREAM_ALARM);// 4                    current = am.getStreamVolume(AudioManager.STREAM_ALARM);                    Log.e("service", "闹铃音量值：" + max + "-" + current);                    max = am.getStreamMaxVolume(AudioManager.STREAM_NOTIFICATION);// 5                    current = am                            .getStreamVolume(AudioManager.STREAM_NOTIFICATION);                    Log.e("service", "提示声音音量值：" + max + "-" + current);                    // ------还可以通过动态设置音量值的大小，方法如下：                    // public void setStreamVolume(int streamType, int index,                    // int flags);                    // streamType以上几种模式中的一种，                    // index：设置音量的大小                    // flags：标志位，不太清楚做什么的。