Android: How to change size of app:fabSize="normal" for Floating Action Button

Question

When using the new FloatingActionButton, the size is determined by app:fabSize="normal". How can I set what in dp is the size referenced by "normal"?

I tried to create values/attrs.xml:

<?xml version="1.0" encoding="utf-8"?> <resources>     <declare-styleable name="app">         <attr name="fabSize">             <enum name="mini" value="50dp" />             <enum name="normal" value="100dp" />         </attr>     </declare-styleable> </resources> 

But I get the error

"normal" in attribute "fabSize" is not a valid integer 

Answer 1

There are two different sizes of FAB available: normal or mini

1. Normal (56dp) — This size should be used in most situations.

2. Mini (40dp) — Should only be used when there is a need for visual continuity with other components displayed on the screen.

Answer 2

You can override the normal and mini sizes by adding the following to values/dimens.xml:

<!-- Overriding sizes of the FAB -->   <dimen name="design_fab_size_normal">90dp</dimen>   <dimen name="design_fab_size_mini">30dp</dimen> 

The tricky thing would be if you need more than 2 fab sizes, in that case i guess you need to create a custom view extending the fab.