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Android 程式开发：（十一）选择控件 —— 11.2 DatePicker

分类: 文章 • 2024-06-10 21:52:04

DataPicker和上一节讲的TimePicker很相似。使用DatePicker，可以让用户选择一个特定的日期。下面展示如何使用DatePicker。

1、使用上一节的工程，BasicViews4，修改main.xml。

[html] view plaincopy
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
  3. android:layout_width="fill_parent"
  4. android:layout_height="fill_parent"
  5. android:orientation="vertical">
  7. <Buttonandroid:id="@+id/btnSet"
  8. android:layout_width="wrap_content"
  9. android:layout_height="wrap_content"
  10. android:text="Iamallset!"
  11. android:onClick="onClick"/>
  13. <DatePickerandroid:id="@+id/datePicker"
  14. android:layout_width="wrap_content"
  15. android:layout_height="wrap_content"/>
  17. <TimePickerandroid:id="@+id/timePicker"
  18. android:layout_width="wrap_content"
  19. android:layout_height="wrap_content"/>
  21. </LinearLayout>
2、F11调试。竖屏模式显式DatePicker稍微有一些窄，按Ctrl+F11，可以更改屏幕的显示方向。

Android 程式开发：（十一）选择控件 —— 11.2 DatePicker

3、在BasicViews4Activity.java中添加一些代码

[java] view plaincopy
  1. packagenet.learn2develop.BasicViews4;
  3. importjava.text.SimpleDateFormat;
  4. importjava.util.Calendar;
  5. importjava.util.Date;
  7. importandroid.app.Activity;
  8. importandroid.app.DatePickerDialog;
  9. importandroid.app.Dialog;
  10. importandroid.app.TimePickerDialog;
  11. importandroid.os.Bundle;
  12. importandroid.view.View;
  13. importandroid.widget.DatePicker;
  14. importandroid.widget.TimePicker;
  15. importandroid.widget.Toast;
  17. publicclassBasicViews4ActivityextendsActivity{
  18. TimePickertimePicker;
  19. DatePickerdatePicker;
  21. inthour,minute;
  22. intyr,month,day;
  24. staticfinalintTIME_DIALOG_ID=0;
  25. staticfinalintDATE_DIALOG_ID=1;
  27. /**Calledwhentheactivityisfirstcreated.*/
  28. @Override
  29. publicvoidonCreate(BundlesavedInstanceState){
  30. super.onCreate(savedInstanceState);
  31. setContentView(R.layout.main);
  33. timePicker=(TimePicker)findViewById(R.id.timePicker);
  34. timePicker.setIs24HourView(true);
  36. //showDialog(TIME_DIALOG_ID);
  37. datePicker=(DatePicker)findViewById(R.id.datePicker);
  39. //---getthecurrentdate---
  40. Calendartoday=Calendar.getInstance();
  41. yr=today.get(Calendar.YEAR);
  42. month=today.get(Calendar.MONTH);
  43. day=today.get(Calendar.DAY_OF_MONTH);
  45. showDialog(DATE_DIALOG_ID);
  46. }
  48. @Override
  49. protectedDialogonCreateDialog(intid)
  50. {
  51. switch(id){
  52. caseTIME_DIALOG_ID:
  53. returnnewTimePickerDialog(
  54. this,mTimeSetListener,hour,minute,false);
  55. caseDATE_DIALOG_ID:
  56. returnnewDatePickerDialog(
  57. this,mDateSetListener,yr,month,day);
  59. }
  60. returnnull;
  61. }
  63. privateDatePickerDialog.OnDateSetListenermDateSetListener=
  64. newDatePickerDialog.OnDateSetListener()
  65. {
  66. publicvoidonDateSet(
  67. DatePickerview,intyear,intmonthOfYear,intdayOfMonth)
  68. {
  69. yr=year;
  70. month=monthOfYear;
  71. day=dayOfMonth;
  72. Toast.makeText(getBaseContext(),
  73. "Youhaveselected:"+(month+1)+
  74. "/"+day+"/"+year,
  75. Toast.LENGTH_SHORT).show();
  76. }
  77. };
  79. privateTimePickerDialog.OnTimeSetListenermTimeSetListener=
  80. newTimePickerDialog.OnTimeSetListener()
  81. {
  82. publicvoidonTimeSet(
  83. TimePickerview,inthourOfDay,intminuteOfHour)
  84. {
  85. hour=hourOfDay;
  86. minute=minuteOfHour;
  88. SimpleDateFormattimeFormat=newSimpleDateFormat("hh:mmaa");
  89. Datedate=newDate(0,0,0,hour,minute);
  90. StringstrDate=timeFormat.format(date);
  92. Toast.makeText(getBaseContext(),
  93. "Youhaveselected"+strDate,
  94. Toast.LENGTH_SHORT).show();
  95. }
  96. };
  98. publicvoidonClick(Viewview){
  99. Toast.makeText(getBaseContext(),
  100. "Dateselected:"+(datePicker.getMonth()+1)+
  101. "/"+datePicker.getDayOfMonth()+
  102. "/"+datePicker.getYear()+"\n"+
  103. "Timeselected:"+timePicker.getCurrentHour()+
  104. ":"+timePicker.getCurrentMinute(),
  105. Toast.LENGTH_SHORT).show();
  106. }
  108. }
4、点击按钮。Android 程式开发：（十一）选择控件 —— 11.2 DatePicker

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