Android中获取系统的时间

activity代码

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.form_widget);
         showDatePicker();
    }
    private void showDatePicker() {
		// TODO Auto-generated method stub
		DatePicker datePicker = (DatePicker)findViewById(R.id.datePicker1);
		//得到系统时间
		Calendar calendar = Calendar.getInstance();
		datePicker.init(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
				calendar.get(Calendar.DAY_OF_MONTH), new OnDateChangedListener() {

			public void onDateChanged(DatePicker view, int year, int monthOfYear,
					int dayOfMonth) {
				// TODO Auto-generated method stub
				Toast.makeText(FormWidgetActivity.this, "Year:"+year+" Month"+monthOfYear+" Day"+dayOfMonth, 3000).show();
			}
		});
	}

xml代码：

 <DatePicker
        android:id="@+id/datePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />