Animation 왼쪽에서 들어오기 ( Left In )

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
	<translate android:fromXDelta="0%p" android:toXDelta="-100%p" android:duration="300"/>
	<alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="300" />
</set>

<alpha/>
android:fromAlpha : 시작 투명도
android:toAlpha : 종료 투명도
0.0 투명
1.0 불투명
android:duration 1/1000초 milliseconds

startAnimation( AnimationUtils.loadAnimation(mContext, R.anim.left_in) );

startAnimation( AnimationUtils.loadAnimation(mContext, R.anim.left_in) );