Elevation + transparency bug on Android Lollipop

Question

Using a background color for a view with some alpha (e.g. #99fe0038) and some elevation on API 21 reveals two circles: one for the view itself and another inside:

Elevation and background color are set via code:

view.setElevation(getResources().getDimensionPixelSize(R.dimen.fab_elevation_lollipop));
view.setBackgroundColor(Color.parseColor("#99fe0038"));

Without setting elevation or with using an opaque color everything looks like expected.

Is it an Android bug or have I missed something here?

Still happening on API 24 and 26 (real device and emulator)... this is the only link I found related to this issue, no body seems to have a solution... Got here actually from your GitHub: github.com/makovkastar/FloatingActionButton/issues/41 — Hugo Allexis Cardona
– Hugo Allexis Cardona, Commented Oct 17, 2017 at 3:25

Gustavo Morales · Accepted Answer · 2016-07-01 14:11:23Z

0

Removing shadow effect worked for me.

FAB.setShadow(false);        
FAB.setBackgroundColor(getResources().getColor(R.color.fab_transparent));

edited Jul 1, 2016 at 14:11

Gustavo Morales

2,6709 gold badges34 silver badges40 bronze badges

answered Jul 1, 2016 at 12:11

ajoe

12 bronze badges

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