android DatePicker

DatePicker要在初始化时设置监听器，初始化包括初始的年月日。月份需要加1才是真正的月份。

protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.w3_14) ;
		
		final TextView tv1 = (TextView) findViewById(R.id.w3_14_tv1) ;
		final DatePicker dp = (DatePicker) findViewById(R.id.w3_14_dp1) ;
		final TimePicker tp = (TimePicker) findViewById(R.id.w3_14_tp1) ;
		
		int year = 2015 ;int monthOfYear = 1 ;int dayOfMonth = 1 ;
		dp.init(year, monthOfYear, dayOfMonth, new OnDateChangedListener() {
			public void onDateChanged(DatePicker view, int year, int monthOfYear,
					int dayOfMonth) {
				tv1.setText(""+ year +"-" +  monthOfYear + "-" +  dayOfMonth) ;
			}
		}) ;
		
		tp.setIs24HourView(true) ;
		tp.setOnTimeChangedListener(new OnTimeChangedListener() {
			public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
				tv1.setText(""+ hourOfDay + "-" + minute) ;
			}
		}) ;
	}

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/w3_14_tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

    <DatePicker
        android:id="@+id/w3_14_dp1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TimePicker
        android:id="@+id/w3_14_tp1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>