本文介绍了如何验证DatePickerDialog？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我创建AgeCalculator。结果
我想验证DatePickerDialog ..结果
在我的应用程序时，应用程序是负载系统日期将显示结果
之后，当我从DatePicker的设置生日，日期设置为TextView的。
结果但用户无法设置BIRTHDATE BIGGER于当前日期... 结果
这里是我的code
AgeCalculator.java
包com.example.agecalculator;进口的java.util.Calendar;进口android.app.Activity;
进口android.app.DatePickerDialog;
进口android.app.Dialog;
进口android.os.Bundle;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.DatePicker;
进口android.widget.TextView;公共类AgeCalculator扩展活动实现OnClickListener {
TextView中的currentdate，出生日期，ageDisplay;
AgeCalculation年龄=无效;
静态最终诠释DATE_START_DIALOG_ID = 0;
私人INT startYear = 2015;
私人INT startMonth = 0;
私人INT朝九特派= 8; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{ super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）;
年龄=新AgeCalculation（）;
的currentdate =（的TextView）findViewById（R.id.txtSysDate）;
currentDate.setText（age.getCurrentDate（））;
生日=（的TextView）findViewById（R.id.txtBirthDate）;
birthDate.setOnClickListener（本）;
ageDisplay =（的TextView）findViewById（R.id.txtAge）;
日历有效= Calendar.getInstance（）;
INT validYear = valid.get（Calendar.YEAR）;
INT validMonth = valid.get（的Calendar.MONTH）;
INT validDay = valid.get（Calendar.DAY_OF_MONTH）; } @覆盖
保护对话框onCreateDialog（INT ID）{
开关（ID）{
案例DATE_START_DIALOG_ID：
返回新DatePickerDialog（这一点，mDateSetListener，startYear，
startMonth，朝九特派）;
}
返回null;
} 私人最终DatePickerDialog.OnDateSetListener mDateSetListener =新DatePickerDialog.OnDateSetListener（）{
@覆盖
公共无效onDateSet（查看的DatePicker，诠释selectedYear，
INT selectedMonth，诠释selectedDay）{
startYear = selectedYear;
startMonth = selectedMonth;
朝九特派= selectedDay;
age.setDateOfBirth（startYear，startMonth，朝九特派）;
birthDate.setText（selectedDay + - +（startMonth + 1）+ -
+ startYear）;
calculateAge（）;
}
}; @覆盖
公共无效的onClick（视图v）{
开关（v.getId（））{
案例R.id.txtBirthDate：
的ShowDialog（DATE_START_DIALOG_ID）;
打破; 默认：
打破;
}
} 私人无效calculateAge（）{
age.calcualteYear（）;
age.calcualteMonth（）;
age.calcualteDay（）; ageDisplay.setText（age.getResult（））;
}
// TODO自动生成方法存根}
AgeCalculation.java
包com.example.agecalculator;进口的java.util.Calendar;公共类AgeCalculation {
私人日历结束;
私人日历启动;
私人诠释endYear;
私人诠释endMonth;
私人诠释endday指定;
私人诠释startYear;
私人诠释startMonth;
私人诠释朝九特派;
私人诠释calYear;
私人诠释calMonth;
私人诠释calDay; 公共字符串getCurrentDate（）{
结束= Calendar.getInstance（）;
endYear = end.get（Calendar.YEAR）;
endMonth = end.get（的Calendar.MONTH）;
endMonth ++;
endday指定= end.get（Calendar.DAY_OF_MONTH）;
返回endday指定+ - + endMonth + - + endYear; } 公共无效setDateOfBirth（INT SYEAR，诠释sMonth，诠释SDAY）{
startYear = SYEAR;
startMonth = sMonth;
startMonth ++;
朝九特派= SDAY; 如果（SYEAR＆GT; endYear）{ } } 公共无效calcualteYear（）{
calYear = endYear - startYear; } 公共无效calcualteMonth（）{
如果（endMonth＆GT; = startMonth）{
calMonth = endMonth - startMonth;
}其他{
calMonth = endMonth - startMonth;
calMonth = 12 + calMonth;
calYear--;
} } 公共无效calcualteDay（）{ 如果（endday指定＆GT; =朝九特派）{
calDay = endday指定 - 朝九特派;
}其他{
calDay = endday指定 - 朝九特派;
calDay = 30 + calDay;
如果（calMonth == 0）{
calMonth = 11;
calYear--;
}其他{
calMonth--;
} }
} 公共字符串的getResult（）{
回归日：+ calDay +\\ n+月+ calMonth +\\ n+年：
+ calYear;
} 众长getSeconde（）{
开始= Calendar.getInstance（）;
start.set（Calendar.YEAR，startYear）;
start.set（的Calendar.MONTH，startMonth）;
start.set（Calendar.DAY_OF_MONTH，朝九特派）;
start.set（Calendar.HOUR，12）;
start.set（Calendar.MINUTE，30）;
start.set（Calendar.SECOND，60）;
start.set（Calendar.MILLISECOND，60）;
长今= end.getTimeInMillis（）;
长老= start.getTimeInMillis（）;
长差异=老 - 现在;
返回差异/ 1000;
}}
解决方案
在设定最高日的DatePicker 。
@覆盖
保护对话框onCreateDialog（INT ID）{
开关（ID）{
案例DATE_START_DIALOG_ID：
DatePickerDialog对话框=新DatePickerDialog（这一点，mDateSetListener，
startYear，startMonth，朝九特派）;
// maxDateLong可以System.currentTimeMillis的（）
。dialog.getDatePicker（）setMaxDate（maxDateLong）;
返回对话框;
}
返回null;
}
I create AgeCalculator.
I want to validate DatePickerDialog..
In my App when app is load system date will display
after that when I set birthdate from DatePicker, Date is set to TextView.
BUT USER CAN NOT SET BIRTHDATE BIGGER THAN CURRENT DATE...
here is my code
AgeCalculator.java
package com.example.agecalculator;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.DatePicker;
import android.widget.TextView;
public class AgeCalculator extends Activity implements OnClickListener {
TextView currentDate, birthDate, ageDisplay;
AgeCalculation age = null;
static final int DATE_START_DIALOG_ID = 0;
private int startYear = 2015;
private int startMonth = 0;
private int startDay = 8;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
age = new AgeCalculation();
currentDate = (TextView) findViewById(R.id.txtSysDate);
currentDate.setText(age.getCurrentDate());
birthDate = (TextView) findViewById(R.id.txtBirthDate);
birthDate.setOnClickListener(this);
ageDisplay = (TextView) findViewById(R.id.txtAge);
Calendar valid = Calendar.getInstance();
int validYear = valid.get(Calendar.YEAR);
int validMonth = valid.get(Calendar.MONTH);
int validDay = valid.get(Calendar.DAY_OF_MONTH);
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_START_DIALOG_ID:
return new DatePickerDialog(this, mDateSetListener, startYear,
startMonth, startDay);
}
return null;
}
private final DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
startYear = selectedYear;
startMonth = selectedMonth;
startDay = selectedDay;
age.setDateOfBirth(startYear, startMonth, startDay);
birthDate.setText(selectedDay + "-" + (startMonth + 1) + "-"
+ startYear);
calculateAge();
}
};
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.txtBirthDate:
showDialog(DATE_START_DIALOG_ID);
break;
default:
break;
}
}
private void calculateAge() {
age.calcualteYear();
age.calcualteMonth();
age.calcualteDay();
ageDisplay.setText(age.getResult());
}
// TODO Auto-generated method stub
}
AgeCalculation.java
package com.example.agecalculator;
import java.util.Calendar;
public class AgeCalculation {
private Calendar end;
private Calendar start;
private int endYear;
private int endMonth;
private int endDay;
private int startYear;
private int startMonth;
private int startDay;
private int calYear;
private int calMonth;
private int calDay;
public String getCurrentDate() {
end = Calendar.getInstance();
endYear = end.get(Calendar.YEAR);
endMonth = end.get(Calendar.MONTH);
endMonth++;
endDay = end.get(Calendar.DAY_OF_MONTH);
return endDay + "-" + endMonth + "-" + endYear;
}
public void setDateOfBirth(int sYear, int sMonth, int sDay) {
startYear = sYear;
startMonth = sMonth;
startMonth++;
startDay = sDay;
if (sYear > endYear) {
}
}
public void calcualteYear() {
calYear = endYear - startYear;
}
public void calcualteMonth() {
if (endMonth >= startMonth) {
calMonth = endMonth - startMonth;
} else {
calMonth = endMonth - startMonth;
calMonth = 12 + calMonth;
calYear--;
}
}
public void calcualteDay() {
if (endDay >= startDay) {
calDay = endDay - startDay;
} else {
calDay = endDay - startDay;
calDay = 30 + calDay;
if (calMonth == 0) {
calMonth = 11;
calYear--;
} else {
calMonth--;
}
}
}
public String getResult() {
return "Day: " + calDay + "\n" + "Month:" + calMonth + "\n" + "Year:"
+ calYear;
}
public long getSeconde() {
start = Calendar.getInstance();
start.set(Calendar.YEAR, startYear);
start.set(Calendar.MONTH, startMonth);
start.set(Calendar.DAY_OF_MONTH, startDay);
start.set(Calendar.HOUR, 12);
start.set(Calendar.MINUTE, 30);
start.set(Calendar.SECOND, 60);
start.set(Calendar.MILLISECOND, 60);
long now = end.getTimeInMillis();
long old = start.getTimeInMillis();
long diff = old - now;
return diff / 1000;
}
}
解决方案
Set max date in DatePicker.
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_START_DIALOG_ID:
DatePickerDialog dialog = new DatePickerDialog(this, mDateSetListener,
startYear, startMonth, startDay);
// maxDateLong can be System.currentTimeMillis()
dialog.getDatePicker().setMaxDate(maxDateLong);
return dialog;
}
return null;
}
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