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 > |
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())); } } |
希望本文所述对大家的Android程序设计有所帮助。