Android系统定制时，需要调整音量等级，以便实现更精确的音量，可通过如下方式修改。以通话音量等级为例
diff --git a/frameworks/base/services/core/java/com/android/server/audio/AudioService.java b/frameworks/base/services/core/java/com/android/server/audio/AudioService.java index 348c1ce..d0e63bb 100644 --- a/frameworks/base/services/core/java/com/android/server/audio/AudioService.java +++ b/frameworks/base/services/core/java/com/android/server/audio/AudioService.java @@ -325,7 +325,7 @@ public class AudioService extends IAudioService.Stub /** Maximum volume index values for audio streams */ protected static int[] MAX_STREAM_VOLUME = new int[] { - 5, // STREAM_VOICE_CALL + 9, // STREAM_VOICE_CALL 7, // STREAM_SYSTEM 7, // STREAM_RING 15, // STREAM_MUSIC调整默认音量
diff --git a/frameworks/base/media/java/android/media/AudioSystem.java b/frameworks/base/media/java/android/media/AudioSystem.java index b30c7b4..f2a3364 100644 --- a/frameworks/base/media/java/android/media/AudioSystem.java +++ b/frameworks/base/media/java/android/media/AudioSystem.java @@ -902,7 +902,7 @@ public class AudioSystem } public static int[] DEFAULT_STREAM_VOLUME = new int[] { - 4, // STREAM_VOICE_CALL + 6, // STREAM_VOICE_CALL 7, // STREAM_SYSTEM 5, // STREAM_RING 5, // STREAM_MUSIC
