判断输入的年月日是否合法的工具类如下，可直接复制粘贴使用：

package com.company.utils;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class ValidDateUtil {

private static final String TAG = ValidDateUtil.class.getSimpleName();

public static boolean validDateTime(String timeStr) {

String format = "((19|20)[0-9]{2})-(0?[1-9]|1[012])-(0?[1-9]|[12][0-9]|3[01]) "

+ "([01]?[0-9]|2[0-3]):[0-5]?[0-9]:[0-5]?[0-9]";

Pattern pattern = Pattern.compile(format);

Matcher matcher = pattern.matcher(timeStr);

if (matcher.matches()) {

pattern = Pattern.compile("(\\d{4})-(\\d+)-(\\d+).*");

matcher = pattern.matcher(timeStr);

if (matcher.matches()) {

int y = Integer.valueOf(matcher.group(1));

int m = Integer.valueOf(matcher.group(2));

int d = Integer.valueOf(matcher.group(3));

if (d > 28) {

Calendar c = Calendar.getInstance();

c.set(y, m - 1, 1);

int lastDay = c.getActualMaximum(Calendar.DAY_OF_MONTH);

return (lastDay >= d);

}

}

return true;

} else {

return false;

}

}

}

使用方式如下，因为只判断年月日，因此时分秒我默认都是00，主要是为了套用SimpleDateFormat的格式：

private long refreshAddTime() {

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

StringBuilder sb = new StringBuilder();

sb.append(mEditYear.getEditableText().toString()).append("-");

sb.append(mEditMonth.getEditableText().toString()).append("-");

sb.append(mEditDay.getEditableText().toString()).append(" ");

sb.append("00").append(":").append("00").append(":").append("00");

Log.d(TAG,"refreshAddTime: contract string: " + sb.toString());

try {

Date addTime = format.parse(sb.toString());

//判断加入时间是否大于当前时间

if (System.currentTimeMillis() < addTime.getTime()){

ToastUtil.showCustomToast(mContext,mContext.getResources().getString(R.string.add_time_error));

mAddTimeIsOk = false;

return 0;

}

//判断加入时间是否为有效输入

if (ValidDateUtil.validDateTime(sb.toString())){

Log.d(TAG,"ValidDateUtil: is valid date!!!!");

mAddTimeIsOk = true;

return addTime.getTime()/1000;

} else {

mAddTimeIsOk = false;

ToastUtil.showCustomToast(mContext,mContext.getResources().getString(R.string.input_add_time_error));

}

} catch (ParseException e) {

mAddTimeIsOk = false;

ToastUtil.showCustomToast(mContext,mContext.getResources().getString(R.string.input_add_time_error));

FoodLog.e(TAG,"add time error!!!!!");

}

return 0;

}