AlphaAnimation for Fading Animation

<alpha>

A fading animation. Represents an AlphaAnimation. Supports the following attributes:

          fromAlpha - 0.0 to 1.0, where 0.0 is transparent.

          toAlpha - 0.0 to 1.0, where 0.0 is transparent.

(Ex)

<alpha
           xmlns:android="http://schemas.android.com/apk/res/android"
           android:interpolator="@android:anim/accelerate_interpolator"
           android:fromAlpha="0.0"
           android:toAlpha="1.0"
           android:duration="@android:integer/config_longAnimTime" />