Apps reducing button width with animation

[mnakhaepoor]

how can i make a button like the one that presents in image below?

so as you can see i need to implement a sign in button that gathers smoothly after clicked on
next a fragment should be opened with reveal effect
my main problem is implementing button effect
any kind of help will be highly appreciated!

 

[Deleted User]

Is this any help?

http://android-er.blogspot.co.uk/2012/02/apply-animation-on-button.html

 

[mnakhaepoor]

Is this any help?

http://android-er.blogspot.co.uk/2012/02/apply-animation-on-button.html

i will kiss you if i find you for that favor
ill check that with scale animation and tell u about the result
thanks