FAB - square on pre Lollipop and without shadow on Lollipop

Question

It looks like FloatingActionButton is not working ether on Android 4.0 and Lollipop. As you can see on image below, on Android Lollipopo shadow is missing and o

Answer 1

If the FAB still appears as square after setting borderWidth to 0dp, make sure that you aren't setting android:background in your XML or calling setBackgroundColor in code.

You should use android:backgroundTint (XML) or setSupportBackgroundTintList (code)

Answer 2

Setting app:borderWidth="0dp" works. But if you are getting rendering issues in Android studio and have the Renderer set to Android M or 22, set it to 21

Answer 3

Seems to be a bug. A developer said "Fixed internally. Will be out soon.".

Answer 4

Thanks to @harism comment, simply setting app:borderWidth="0dp" resolve both issues.

Note: don't forget to add xmlns:app="http://schemas.android.com/apk/res-auto" to your root layout.

Answer 5

@Raghunandan, I have same problem on Lollipop also.
Finally I find that the root cause is a drawable named "fab_background" in my drawable folder.
The drawable is previously used for my own fab implementation.
Now I can see round fab after I rename this drawable.