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

Author: Eric Laurent

core/java/android/preference/VolumePreference.java

@@ -239,9 +239,7 @@ public class SeekBarVolumizer implements OnSeekBarChangeListener, Runnable {
             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);
                 }
             }

core/java/android/view/VolumePanel.java

@@ -296,41 +296,33 @@ public void onReceive(Context context, Intent intent) {
 
     private boolean isMuted(int streamType) {
         if (streamType == STREAM_MASTER) {
-            return mAudioService.isMasterMute();
+            return mAudioManager.isMasterMute();
         } else {
-            return mAudioService.isStreamMute(streamType);
+            return mAudioManager.isStreamMute(streamType);
         }
     }
 
     private int getStreamMaxVolume(int streamType) {
         if (streamType == STREAM_MASTER) {
-            return mAudioService.getMasterMaxVolume();
+            return mAudioManager.getMasterMaxVolume();
         } else {
-            return mAudioService.getStreamMaxVolume(streamType);
+            return mAudioManager.getStreamMaxVolume(streamType);
         }
     }
 
     private int getStreamVolume(int streamType) {
         if (streamType == STREAM_MASTER) {
-            return mAudioService.getMasterVolume();
+            return mAudioManager.getMasterVolume();
         } else {
-            return mAudioService.getStreamVolume(streamType);
+            return mAudioManager.getStreamVolume(streamType);
         }
     }
 
     private void setStreamVolume(int streamType, int index, int flags) {
         if (streamType == STREAM_MASTER) {
-            mAudioService.setMasterVolume(index, flags);
+            mAudioManager.setMasterVolume(index, flags);
         } else {
-            mAudioService.setStreamVolume(streamType, index, flags);
-        }
-    }
-
-    private int getLastAudibleStreamVolume(int streamType) {
-        if (streamType == STREAM_MASTER) {
-            return mAudioService.getLastAudibleMasterVolume();
-        } else {
-            return mAudioService.getLastAudibleStreamVolume(streamType);
+            mAudioManager.setStreamVolume(streamType, index, flags);
         }
     }
 
@@ -399,13 +391,18 @@ private void addOtherVolumes() {
 
     /** Update the mute and progress state of a slider */
     private void updateSlider(StreamControl sc) {
-        sc.seekbarView.setProgress(getLastAudibleStreamVolume(sc.streamType));
+        sc.seekbarView.setProgress(getStreamVolume(sc.streamType));
         final boolean muted = isMuted(sc.streamType);
         sc.icon.setImageResource(muted ? sc.iconMuteRes : sc.iconRes);
-        if (sc.streamType == AudioManager.STREAM_RING && muted
-                && mAudioManager.shouldVibrate(AudioManager.VIBRATE_TYPE_RINGER)) {
+        if (sc.streamType == AudioManager.STREAM_RING &&
+                mAudioManager.getRingerMode() == AudioManager.RINGER_MODE_VIBRATE) {
             sc.icon.setImageResource(R.drawable.ic_audio_ring_notif_vibrate);
         }
+        if (sc.streamType != mAudioManager.getMasterStreamType() && muted) {
+            sc.seekbarView.setEnabled(false);
+        } else {
+            sc.seekbarView.setEnabled(true);
+        }
     }
 
     private boolean isExpanded() {
@@ -510,9 +507,7 @@ protected void onMuteChanged(int streamType, int flags) {
     }
 
     protected void onShowVolumeChanged(int streamType, int flags) {
-        int index = isMuted(streamType) ?
-                getLastAudibleStreamVolume(streamType)
-                : getStreamVolume(streamType);
+        int index = getStreamVolume(streamType);
 
         mRingIsSilent = false;
 
@@ -592,6 +587,11 @@ protected void onShowVolumeChanged(int streamType, int flags) {
                 sc.seekbarView.setMax(max);
             }
             sc.seekbarView.setProgress(index);
+            if (streamType != mAudioManager.getMasterStreamType() && isMuted(streamType)) {
+                sc.seekbarView.setEnabled(false);
+            } else {
+                sc.seekbarView.setEnabled(true);
+            }
         }
 
         if (!mDialog.isShowing()) {
@@ -607,8 +607,7 @@ protected void onShowVolumeChanged(int streamType, int flags) {
         // Do a little vibrate if applicable (only when going into vibrate mode)
         if ((flags & AudioManager.FLAG_VIBRATE) != 0 &&
                 mAudioService.isStreamAffectedByRingerMode(streamType) &&
-                mAudioService.getRingerMode() == AudioManager.RINGER_MODE_VIBRATE &&
-                mAudioService.shouldVibrate(AudioManager.VIBRATE_TYPE_RINGER)) {
+                mAudioManager.getRingerMode() == AudioManager.RINGER_MODE_VIBRATE) {
             sendMessageDelayed(obtainMessage(MSG_VIBRATE), VIBRATE_DELAY);
         }
     }
@@ -646,7 +645,7 @@ protected void onStopSounds() {
     protected void onVibrate() {
 
         // Make sure we ended up in vibrate ringer mode
-        if (mAudioService.getRingerMode() != AudioManager.RINGER_MODE_VIBRATE) {
+        if (mAudioManager.getRingerMode() != AudioManager.RINGER_MODE_VIBRATE) {
             return;
         }
 

media/java/android/media/AudioService.java

@@ -701,6 +701,10 @@ public void adjustStreamVolume(int streamType, int direction, int flags) {
             // 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