Android DatePicker, TimePicker控件的使用

public class TimerPickerActivity extends Activity{

private DatePicker datePicker;
private TimePicker timePicker;
private static Calendar calendar = Calendar.getInstance();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.timepicker);

timePicker = (TimePicker)findViewById(R.id.timePicker1);
datePicker = (DatePicker)findViewById(R.id.datePicker1);

timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {

@Override
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
// TODO Auto-generated method stub
StringBuffer buffer = new StringBuffer();
buffer.append(hourOfDay < 10 ? "0" + hourOfDay:hourOfDay );
buffer.append(":").append(minute);
Toast.makeText(TimerPickerActivity.this, buffer.toString(), Toast.LENGTH_SHORT).show();
}
});

datePicker = (DatePicker)findViewById(R.id.datePicker1);
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);

datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() {

@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub

}
});
}
}