Android --日期控件使用并显示选择的日期

<?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
    }
}