Implement new volume display policy.

Whenever a stream type is muted, the progress bar in volume panel
is at 0.
If a stream is muted by ringer mode and does not control ringer mode,
the progress bar is disabled.
Pressing VOL- when in vibrate or silent mode resets the last audible
volume of ringtone stream (music strem on tablets) to 0.

VolumePanel implementation:
 - Always prefer AudioManager APIs over AudioService APIs when available on both.
 - Do not use AudioManager.shouldVibrate() (deprecated).

Change-Id: I57fcb19ada4e8d729b6b41d668496562ebe340c3

1 files changed, 4 insertions, 0 deletions

diff --git a/media/java/android/media/AudioService.java b/media/java/android/media/AudioService.java
index 8015203..8da7d0f 100644
--- a/media/java/android/media/AudioService.java
+++ b/media/java/android/media/AudioService.java
@@ -701,6 +701,10 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
             // Check if the ringer mode changes with this volume adjustment. If
             // it does, it will handle adjusting the volume, so we won't below
             adjustVolume = checkForRingerModeChange(aliasIndex, direction, step);
+            if ((streamTypeAlias == getMasterStreamType()) &&
+                    (mRingerMode == AudioManager.RINGER_MODE_SILENT)) {
+                streamState.setLastAudibleIndex(0, device);
+            }
         }
 
         // If stream is muted, adjust last audible index only