Android仿支付宝中余额宝的数字动画效果

package com.lcw.rabbit.widget;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.TextView;

/**
 * 高仿余额宝数字动画
 * Create by: chenwei.li
 * Date: 2016-07-20
 * time: 11:52
 * Email: lichenwei.me@foxmail.com
 */
public class CountNumberView extends TextView {
 //动画时长
 private int duration = 1500;
 //显示数字
 private float number;
 //显示表达式
 private String regex;

 //显示表示式
 public static final String INTREGEX = "%1$01.0f";//不保留小数，整数
 public static final String FLOATREGEX = "%1$01.2f";//保留2位小数

 public CountNumberView(Context context, AttributeSet attrs) {
 super(context, attrs);
 }

 /**
 * 显示带有动画效果的数字
 * @param number
 * @param regex
 */
 public void showNumberWithAnimation(float number, String regex) {
 if (TextUtils.isEmpty(regex)) {
  //默认为整数
  this.regex = INTREGEX;
 } else {
  this.regex = regex;
 }
 //修改number属性，会调用setNumber方法
 ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(this, "number", 0, number);
 objectAnimator.setDuration(duration);
 //加速器，从慢到快到再到慢
 objectAnimator.setInterpolator(new AccelerateDecelerateInterpolator());
 objectAnimator.start();
 }

 /**
 * 获取当前数字
 * @return
 */
 public float getNumber() {
 return number;
 }

 /**
 * 根据正则表达式，显示对应数字样式
 * @param number
 */
 public void setNumber(float number) {
 this.number = number;
 setText(String.format(regex, number));
 }
}

 mTvCountNum1.showNumberWithAnimation(3201.23f, CountNumberView.FLOATREGEX);
 mTvCountNum2.showNumberWithAnimation(65535f, CountNumberView.INTREGEX);