With volume_separate_notification flag enbaled, muting ring volume
slice will cause notification volume slice to gray out.
There used to be a bug in which notification slice would not get
updated in response to a change in ring volume mute/unmute broadcast.
The resulting erroneous behavior was notification slider would get to
zero but not get grayed out. To fix that bug, VolumeSliceHelper listens
to ring stream mute/unmute broadcasts and forwards them to notification
slice.
Bug: b/266072907
Test: make DEBUG_ROBOLECTRIC=1 ROBOTEST_FILTER="NotificationVolumePreferenceControllerTest|VolumeSliceHelperTest" RunSettingsRoboTests -j40
Change-Id: I2ab51f1272bf99a0c3d9ca285354052d00910c90
Fix a bug where introduction of a separate_ring_volume slice meant that
the original ring_volume slice would not get notified of ring stream
muting event.
Bug: b/266855922
Test: make DEBUG_ROBOLECTRIC=1 ROBOTEST_FILTER=VolumeSliceHelperTest RunSettingsRoboTests -j40
Change-Id: Ifb5ebe4e7d9bde3d14336891cce3fbee167a5911
When users open volume panel and keep on changing the volume slider for
a while, the panel starts to defer the slider updating, and finally gets
stuck and causes an ANR.
Root cause:
Volume panel has four volume adjusting slices. Each of them registers
a broadcast receiver to listen to the volume changed and muted events.
However, when the media volume changes, AudioManager will send four
broadcasts (music, assistant, accessibility, tts) to every receiver, and
each of them will reload slice four times. Thus, one media volume
changed event will lead to 16 (4*4) UI updates. Consequently, keeping on
sliding the volume bar will trigger hundreds of broadcasts and UI
updates, which makes the system busy and getting stuck.
Solution:
Introduce a VolumeSliceHelper to integrate the broadcasts of the volume
slices specifically.
1. Only register one broadcast receiver to reduce the broadcast loading
since the four slices are listening to the same signal.
2. Filter the only one eligible broadcast among the multiple concurrent
ones, and then relay it to the registered slice.
3. Listen to one more action STREAM_DEVICES_CHANGED_ACTION to update the
volume panel when audio output device changes.
Test: robotest, visual
Bug: 144134209
Bug: 160489394
Change-Id: I780b9eee35802b19a5f0ab0a7d07bd3e081f5556
