本文实例讲述了Android中日期与时间设置控件用法。分享给大家供大家参考。具体如下:
1、日期设置控件:DatePickerDialog
2、时间设置控件:TimePickerDialog
实例代码:
页面添加两个Button,单击分别显示日期设置控件和时间设置控件,还是有TextView控件,用于显示设置后的系统时间
main.xml:
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<? xml version = "1.0" encoding = "utf-8" ?>
< LinearLayout xmlns:Android = "http://schemas.android.com/apk/res/android"
Android:orientation = "vertical"
Android:layout_width = "fill_parent"
Android:layout_height = "fill_parent"
>
< TextView Android:id = "@+id/dateAndTime"
Android:layout_width = "fill_parent"
Android:layout_height = "wrap_content"
Android:text = "@string/hello"
/>
< Button
Android:id = "@+id/setDate"
Android:layout_width = "fill_parent"
Android:layout_height = "wrap_content"
Android:text = "Set the Date" ></ Button >
< Button Android:id = "@+id/setTime"
Android:layout_width = "fill_parent"
Android:layout_height = "wrap_content"
Android:text = "Set the Time" ></ Button >
</ LinearLayout >
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ChronoDemo.java如下:
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package yyl.Android;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Locale;
import Android.app.Activity;
import Android.app.DatePickerDialog;
import Android.app.TimePickerDialog;
import Android.os.Bundle;
import Android.view.View;
import Android.widget.Button;
import Android.widget.DatePicker;
import Android.widget.TextView;
import Android.widget.TimePicker;
public class ChronoDemo extends Activity {
//获取日期格式器对象
DateFormat fmtDateAndTime = DateFormat.getDateTimeInstance();
//定义一个TextView控件对象
TextView dateAndTimeLabel = null ;
//获取一个日历对象
Calendar dateAndTime = Calendar.getInstance(Locale.CHINA);
//当点击DatePickerDialog控件的设置按钮时,调用该方法
DatePickerDialog.OnDateSetListener d = new DatePickerDialog.OnDateSetListener()
{
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
//修改日历控件的年,月,日
//这里的year,monthOfYear,dayOfMonth的值与DatePickerDialog控件设置的最新值一致
dateAndTime.set(Calendar.YEAR, year);
dateAndTime.set(Calendar.MONTH, monthOfYear);
dateAndTime.set(Calendar.DAY_OF_MONTH, dayOfMonth);
//将页面TextView的显示更新为最新时间
updateLabel();
}
};
TimePickerDialog.OnTimeSetListener t = new TimePickerDialog.OnTimeSetListener() {
//同DatePickerDialog控件
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
dateAndTime.set(Calendar.HOUR_OF_DAY, hourOfDay);
dateAndTime.set(Calendar.MINUTE, minute);
updateLabel();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.main);
//得到页面设定日期的按钮控件对象
Button dateBtn = (Button)findViewById(R.id.setDate);
//设置按钮的点击事件监听器
dateBtn.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
//生成一个DatePickerDialog对象,并显示。显示的DatePickerDialog控件可以选择年月日,并设置
new DatePickerDialog(ChronoDemo. this ,
d,
dateAndTime.get(Calendar.YEAR),
dateAndTime.get(Calendar.MONTH),
dateAndTime.get(Calendar.DAY_OF_MONTH)).show();
}
});
Button timeBtn = (Button)findViewById(R.id.setTime);
timeBtn.setOnClickListener( new View.OnClickListener() {
//同上原理
@Override
public void onClick(View v) {
new TimePickerDialog(ChronoDemo. this ,
t,
dateAndTime.get(Calendar.HOUR_OF_DAY),
dateAndTime.get(Calendar.MINUTE),
true ).show();
}
});
dateAndTimeLabel=(TextView)findViewById(R.id.dateAndTime);
updateLabel();
}
//更新页面TextView的方法
private void updateLabel() {
dateAndTimeLabel.setText(fmtDateAndTime
.format(dateAndTime.getTime()));
}
}
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希望本文所述对大家的Android程序设计有所帮助。