I am using FAB button for profile picture but it is already having some padding. I am using following code for creating FAB button.
You can changethe attribute app:maxImageSize to match the size of your image.
app:maxImageSize="the wanted size"
I find the solution safer the the overriding of the design_fab_image_size because if your app have several floating action buttons, you will only alter one.
add this in your fab xml layout
android:elevation="0dp"
app:elevation="10dp"
app:useCompatPadding="true"
This will do the job. Worked perfectly for me.
Just Add
app:useCompatPadding="false"
just add this in your dimens.xml
file
<dimen name="design_fab_image_size" tools:override="true">36dp</dimen>
This might not work for 3rd party libraries.