Android 日期验证不起作用
在我的android应用程序中,有两个编辑文本字段,分别取自日期和最后一个日期,我试图检查日期是否有效。我尝试使用此代码,但不起作用。。我找不到的错误在哪里请帮我更正代码Android 日期验证不起作用,android,validation,date,Android,Validation,Date,在我的android应用程序中,有两个编辑文本字段,分别取自日期和最后一个日期,我试图检查日期是否有效。我尝试使用此代码,但不起作用。。我找不到的错误在哪里请帮我更正代码 String fromdate,todate; private Matcher matcher; private static final String DATE_PATTERN = "(0?[1-9]|1[012]) [/.-] (0?[1-9]|[12][0-9]|3[01]) [/
String fromdate,todate;
private Matcher matcher;
private static final String DATE_PATTERN =
"(0?[1-9]|1[012]) [/.-] (0?[1-9]|[12][0-9]|3[01]) [/.-] ((19|20)\\d\\d)";
搜索按钮Onclick代码
advsearch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
fromdate=fromed.getText().toString();
todate=toed.getText().toString();
matcher = Pattern.compile(DATE_PATTERN).matcher(fromdate);
matcher = Pattern.compile(DATE_PATTERN).matcher(todate);
if (!matcher.matches()) {
Toast.makeText(getApplicationContext(), "Invalid Date!", Toast.LENGTH_LONG).show();
}
}
});
}
布尔类
public boolean validate(String date){
matcher = pattern.matcher(date);
if(matcher.matches()){
matcher.reset();
if(matcher.find()){
String day = matcher.group(1);
String month = matcher.group(2);
int year = Integer.parseInt(matcher.group(3));
if (day.equals("31") &&
(month.equals("4") || month .equals("6") || month.equals("9") ||
month.equals("11") || month.equals("04") || month .equals("06") ||
month.equals("09"))) {
return false; // only 1,3,5,7,8,10,12 has 31 days
} else if (month.equals("2") || month.equals("02")) {
//leap year
if(year % 4==0){
if(day.equals("30") || day.equals("31")){
return false;
}else{
return true;
}
}else{
if(day.equals("29")||day.equals("30")||day.equals("31")){
return false;
}else{
return true;
}
}
}else{
return true;
}
}else{
return false;
}
}else{
return false;
}
}
}
}
为数据验证创建单独的类,如下所示
public class DateValidator {
private Pattern pattern;
private Matcher matcher;
private static final String DATE_PATTERN =
"(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/((19|20)\\d\\d)";
public DateValidator() {
pattern = Pattern.compile(DATE_PATTERN);
}
/**
* Validate date format with regular expression
*
* @param date date address for validation
* @return true valid date fromat, false invalid date format
*/
public boolean validate(final String date) {
matcher = pattern.matcher(date);
if (matcher.matches()) {
matcher.reset();
if (matcher.find()) {
String day = matcher.group(1);
String month = matcher.group(2);
int year = Integer.parseInt(matcher.group(3));
if (day.equals("31") &&
(month.equals("4") || month.equals("6") || month.equals("9") ||
month.equals("11") || month.equals("04") || month.equals("06") ||
month.equals("09"))) {
return false; // only 1,3,5,7,8,10,12 has 31 days
} else if (month.equals("2") || month.equals("02")) {
//leap year
if (year % 4 == 0) {
if (day.equals("30") || day.equals("31")) {
return false;
} else {
return true;
}
} else {
if (day.equals("29") || day.equals("30") || day.equals("31")) {
return false;
} else {
return true;
}
}
} else {
return true;
}
} else {
return false;
}
} else {
return false;
}
}
}
然后在打开按钮后,单击下面的代码
fromdate = et.getText().toString();
todate = et2.getText().toString();
DateValidator dateValidator=new DateValidator();
if (dateValidator.validate(fromdate)){
Toast.makeText(getApplicationContext(),"Valid",Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(getApplicationContext(),"InValid",Toast.LENGTH_SHORT).show();
}
和edittext输入数据格式,如dd/mm/yyyy
有关格式的更多信息,请参阅此链接
如果您确切地知道用户如何输入日期(以何种格式,如MM dd YYYY),那么您只需使用3行代码@nilesh即可验证该代码,但不使用布尔类there@angelina尝试了
DateTimeKeyListener
?