//1. add the animation to your code
TextView lblValue= (TextView)findViewById(R.id.lblMainVal);
if(lblValue!=null){
	Animation myFadeInAnimation = AnimationUtils.loadAnimation(this, R.anim.fadein);
	lblValue.startAnimation(myFadeInAnimation);		
}

//2. Create a "fadein.xml" file in the "res/anim" folder with this source
/*
<?xml version="1.0" encoding="utf-8"?>
<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="1000" />
*/