Post List Author Filter View Stops Tab Touch Background Fade/Ripple

[theck13]

Expected

The touch background of all views in the top app bar of the Blog Posts screen shows the fade/ripple effect when tapped or long-pressed and the author filter is present.

Observed

The touch background of all views in the top app bar of the Blog Posts screen stops the fade/ripple effect when tapped or long-pressed and the author filter is present. On API 28, sometimes the ripple stops mid-animation and sometimes the touch background is not shown at all. On API's lower than 28, there is no fade/ripple at all and a solid background color is shown when a view is touched. When the author filter is not present or the AppCompatSpinner view is replaced with an AppCompatImageView view, the fade/ripple works as expected. See the animations below for illustration.

AppCompatSpinner	AppCompatImageView

Reproduced

1. Go to Sites tab.
2. Tap Blog Posts under Publish section.
3. Long-press any view in the top app bar (i.e. back arrow, author filter, Published tab, Drafts tab, Scheduled tab, Trashed tab).

Tested

Google Pixel 3 on Android 9.0 with alpha-164 feature/master-post-filters

[stale[bot]]

This issue has been marked as stale because:

• It has been inactive for the past year.
• It isn't in a project or a milestone.
• It hasn’t been labeled [Pri] Blocker, [Pri] High, or good first issue.

Please comment with an update if you believe this issue is still valid or if it can be closed. This issue will also be reviewed for validity and priority (cc @designsimply).