android edittext 限制小数点后最多只能输入两位数字

private InputFilter lengthFilter = new InputFilter() {
@Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
// source:当前输入的字符
// start:输入字符的开始位置
// end:输入字符的结束位置
// dest：当前已显示的内容
// dstart:当前光标开始位置
// dent:当前光标结束位置
LogUtil.i("", "source=" + source + ",start=" + start + ",end=" + end + ",dest=" + dest.toString() + ",dstart=" + dstart + ",dend=" + dend);
if (dest.length() == 0 && source.equals(".")) {
return "0.";
}
String dValue = dest.toString();
String[] splitArray = dValue.split("\\.");
if (splitArray.length > 1) {
String dotValue = splitArray[1];
if (dotValue.length() == 2) {//输入框小数的位数
return "";
}
}
return null;
}
};

edit.setFilters(new InputFilter[]{lengthFilter});

class   MyInputFilter implements InputFilter{
public MyInputFilter(int dotLength) {
this.dotLength = dotLength;
}

int   dotLength ;

@Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
// source:当前输入的字符
// start:输入字符的开始位置
// end:输入字符的结束位置
// dest：当前已显示的内容
// dstart:当前光标开始位置
// dent:当前光标结束位置
LogUtil.i("", "source=" + source + ",start=" + start + ",end=" + end + ",dest=" + dest.toString() + ",dstart=" + dstart + ",dend=" + dend);
if (dest.length() == 0 && source.equals(".")) {
return "0.";
}
String dValue = dest.toString();
String[] splitArray = dValue.split("\\.");
if (splitArray.length > 1) {
String dotValue = splitArray[1];
if (dotValue.length() == dotLength) {//输入框小数的位数
return "";
}
}
return null;
}
}