Android 10 默认所有类型音量为最大音量

— a/frameworks/base/media/java/android/media/AudioSystem.java
+++ b/frameworks/base/media/java/android/media/AudioSystem.java
@@ -1117,17 +1117,17 @@ public class AudioSystem

 /// M: modify the default stream volume @{
 public static int[] DEFAULT_STREAM_VOLUME = new int[] {

•           3,   // STREAM_VOICE_CALL
  

•    7,  // STREAM_SYSTEM
  

•    7,  // STREAM_RING
  

•    7,  // STREAM_MUSIC
  

•    7,  // STREAM_ALARM
  

•    7,  // STREAM_NOTIFICATION
  

•    7,  // STREAM_BLUETOOTH_SCO
  

•    7,  // STREAM_SYSTEM_ENFORCED
  

•    7,  // STREAM_DTMF
  

•    7,  // STREAM_TTS
  

•    7   // STREAM_ACCESSIBILITY
  

•           7,   // 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
  

•    15   // STREAM_ACCESSIBILITY
  

  };
  /// @}