时间选择器:DatePicker 和TimePicker

1.介绍DatePicker和TimePicker两种实现动态输入日期和时间的功能

2.介绍DataPickerDialog和TimePickerDialog两种实现动态输入日期和时间的对话框

3，介绍两组针对监测日期时间改变的监听器包含：

              OnDataChangedListener和OnTimeChangedListener()

              OnDataSetListener和OnTimeSetListener()

     >当用户更改了DataPicker里的年，月，日时，将触发OnDataChangedListener监听器的OnDataChange()事件

     >当用户更改了TimePicker里的时，分时，将触发OnTimeChangedListener监听器的OnTimeChanged()事件

    >当用户更改了DataPickerDialog里的年，月，日时，将触发OnDataSetListener监听器的onDataSet()事件

    >当用户更改了TimePickerDialog里的时，分时，将触发OnTimeSetListener监听器的onTimeSet()事件

1.xml布局：两个空间DatePicker 和TimePicker

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:tools="http://schemas.android.com/tools"      android:layout_width="match_parent"      android:layout_height="match_parent"      tools:context=".MainActivity" >        <DatePicker          android:id="@+id/datePicker1"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_marginTop="20dp"          android:layout_alignParentLeft="true"          android:layout_alignParentRight="true"          android:layout_alignParentTop="true" />          <TimePicker          android:id="@+id/timePicker1"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_below="@+id/datePicker1"          android:layout_centerHorizontal="true"          android:layout_marginTop="20dp" />    </RelativeLayout>

2.java代码部分

public class MainActivity extends Activity {    private DatePicker datePicker;  private TimePicker timePicker;  private Calendar cal;  private int year;  private int month;  private int day;  private int hour;  private int minute;      @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);    //获取一个日历对象  cal = Calendar.getInstance();  //获取年月日时分秒的信息  year = cal.get(Calendar.YEAR);  month = cal.get(Calendar.MONTH)+1;  day = cal.get(Calendar.DAY_OF_MONTH);  hour = cal.get(Calendar.HOUR_OF_DAY);  minute = cal.get(Calendar.MINUTE);  setTitle(year + "-" + month + "-" + day + "  " + hour + ":" + minute);  datePicker = (DatePicker) findViewById(R.id.datePicker1);  timePicker = (TimePicker) findViewById(R.id.timePicker1);     //datePicker初始化  datePicker.init(year, cal.get(Calendar.MONTH), day, new OnDateChangedListener() {    @Override  public void onDateChanged(DatePicker view, int year, int monthOfYear,  int dayOfMonth) {  // TODO Auto-generated method stub  setTitle(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);  }  });    timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {    @Override  public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {  // TODO Auto-generated method stub  setTitle(hourOfDay + ":" + minute);  }  });  new DatePickerDialog(this, new OnDateSetListener() {    @Override  public void onDateSet(DatePicker view, int year, int monthOfYear,  int dayOfMonth) {  // TODO Auto-generated method stub  setTitle(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);  }  }, year, cal.get(Calendar.MONTH), day).show();     new TimePickerDialog(this, new OnTimeSetListener() {    @Override  public void onTimeSet(TimePicker view, int hourOfDay, int minute) {  // TODO Auto-generated method stub  setTitle(hourOfDay + ":" + minute);  }  }, hour, minute, true).show();  }      }