Android实现数字跳动效果的TextView方法示例

allprojects { 
 repositories { 
  ... 
  maven { url "https://jitpack.io" } 
 } 
} 

dependencies { 
  compile 'com.github.JianxunRao:DancingNumberView:V1.0.1' 
} 

<me.trojx.dancingnumber.DancingNumberView 
   android:id="@+id/dnv" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   app:dnv_duration="6000" 
   app:dnv_format="%.2f"/> 

DancingNumberView dnv = (DancingNumberView) findViewById(R.id.dnv); 
 dnv.setText(text);//设置显示内容 
 dnv.setDuration(duration);//设置完成跳动的持续时长(单位ms) 
 dnv.setFormat(format);//设置数字的显示格式 
 dnv.dance();//启动效果,开始数字跳动 

/** 
* 文本中的数字开始跳动 
 
*/ 
 
public void dance() { 
 
text = getText().toString(); 
 
numbers=new ArrayList<>(); 
 
Pattern pattern = Pattern.compile("\\d+(\\.\\d+)?"); 
 
Matcher matcher=pattern.matcher(text); 
 
while (matcher.find()){ 
 
numbers.add(Float.parseFloat(matcher.group())); 
 
} 
 
textPattern = text.replaceAll("\\d+(\\.\\d+)?",PLACEHOLDER); 
 
numberTemp=new float[numbers.size()]; 
 
ObjectAnimator objectAnimator=ObjectAnimator.ofFloat(this,"factor",0,1); 
 
objectAnimator.setDuration(duration); 
 
objectAnimator.setInterpolator(new AccelerateDecelerateInterpolator()); 
 
objectAnimator.start(); 
 
} 
 
/** 
 
* 获取算数因子 
 
* @return 算数因子 
 
*/ 
 
public float getFactor() { 
 
return factor; 
 
} 
 
/** 
 
* 设置算数因子,为ObjectAnimator调用 
 
* @see ObjectAnimator 
 
* @param factor 算数因子 
 
*/ 
 
public void setFactor(float factor) { 
 
String textNow=textPattern; 
 
this.factor = factor; 
 
for (int i=0;i<numberTemp.length;i++){ 
 
numberTemp[i]=numbers.get(i)*factor; 
 
textNow=textNow.replaceFirst(PLACEHOLDER,String.format(format,numberTemp[i])); 
 
} 
 
setText(textNow); 
 
}