Android-Framework 默认音乐音量最大

代码位置：frameworks/base/services/core/java/com/android/server/audio/AudioService.java

@@ -712,6 +712,9 @@ public class AudioService extends IAudioService.Stub
             }
         }
 
+	// force music max volume 
+	AudioSystem.DEFAULT_STREAM_VOLUME[AudioSystem.STREAM_MUSIC] = MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC];
+
         int maxAlarmVolume = SystemProperties.getInt("ro.config.alarm_vol_steps", -1);
         if (maxAlarmVolume != -1) {
             MAX_STREAM_VOLUME[AudioSystem.STREAM_ALARM] = maxAlarmVolume;