<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <DatePicker        android:id="@+id/datePicker1"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >    </DatePicker></LinearLayout>

public class firstActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        DatePicker myDatePicker=(DatePicker)findViewById(R.id.datePicker1);            //获取对象        OnDateChangedListener onDateChangedListener = new DatePicker.OnDateChangedListener() {                                                                        //设置监听器            @Override            public void onDateChanged(DatePicker view, int year, int monthOfYear,                    int dayOfMonth) {                // TODO Auto-generated method stub                Toast.makeText(getApplicationContext(), "当前日期为："+year+"年"+(monthOfYear+1)+"月"+dayOfMonth+"日", Toast.LENGTH_LONG).show();                        //显示更改后的日期            }        };        myDatePicker.init(2010, 1, 1, onDateChangedListener);                        //初始化日期选择控件  显示月份 = 设置月份+1         myDatePicker.updateDate(2012, 11, 31);                                //更新日期    }}