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, 1 insertions, 3 deletions

diff --git a/core/java/android/preference/VolumePreference.java b/core/java/android/preference/VolumePreference.java
index fe5e76ca4d96..caf55d70226e 100644
--- a/core/java/android/preference/VolumePreference.java
+++ b/core/java/android/preference/VolumePreference.java
@@ -239,9 +239,7 @@ public class VolumePreference extends SeekBarDialogPreference implements
             public void onChange(boolean selfChange) {
                 super.onChange(selfChange);
                 if (mSeekBar != null && mAudioManager != null) {
-                    int volume = mAudioManager.isStreamMute(mStreamType) ?
-                            mAudioManager.getLastAudibleStreamVolume(mStreamType)
-                            : mAudioManager.getStreamVolume(mStreamType);
+                    int volume = mAudioManager.getStreamVolume(mStreamType);
                     mSeekBar.setProgress(volume);
                 }
             }