Java tutorial
//package com.java2s; import android.animation.ValueAnimator; import android.util.TypedValue; import android.widget.TextView; public class Main { public static void changeTextSize(final TextView textView, float from, float to) { ValueAnimator textSizeChangeAnimator = ValueAnimator.ofFloat(from, to); textSizeChangeAnimator.setDuration(150); textSizeChangeAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator valueAnimator) { textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, (float) valueAnimator.getAnimatedValue()); } }); textSizeChangeAnimator.start(); } }