button - Android pop in animation -

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i mave floating action button in app want sort of pop in, invisible , starts grow size 60dp , resizes normal size of 56dp. how can done? know how normal fade in animation, not pop in.

i create animation file in res/anim , use sequential scale animation so:

expand_in.xml

<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android">      <scale          android:fromxscale="0.0"          android:fromyscale="0.0"         android:toxscale="1.1" <!--set scale value here-->         android:toyscale="1.1"         android:pivotx="50%"         android:pivoty="50%"         android:duration="400"/> <!--length of first animation-->       <scale          android:fromxscale="1.1" <!--from whatever scale set in first animation-->         android:fromyscale="1.1"         android:toxscale="1.0" <!--back normal size-->         android:toyscale="1.0"         android:pivotx="50%"          android:pivoty="50%"         android:startoffset="400" <!--start 2nd animation when first 1 ends-->         android:duration="400"/> </set>

then in activity:

animation expandin = animationutils.loadanimation(this, r.anim.expand_in); actionbutton.startanimation(expandin);

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