DataPicker以及TimePicker顯示時間和日期（屏幕上顯示）

public class MainActivity extends Activity {

private DatePicker date_picker;
private TimePicker time_picker;
private TextView tv_date;
private TextView tv_time;
@Override

   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       //初始化
       date_picker=(DatePicker) findViewById(R.id.date);
       time_picker=(TimePicker) findViewById(R.id.time);
       tv_date=(TextView) findViewById(R.id.tv_date);
       tv_time=(TextView) findViewById(R.id.tv_time);
//獲取當前的年月日時分信息

Calendar c=Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month=c.get(Calendar.MONTH);
int day=c.get(Calendar.DAY_OF_MONTH);
int hour=c.get(Calendar.HOUR_OF_DAY);
int minute=c.get(Calendar.MINUTE);
//使用Calendar顯示時，月份從0開始，顯示的時候加1
tv_date.setText("現在日期："+year+"-"+(month+1)+"-"+day);

tv_time.setText("現在時間："+hour+":"+minute);

 //初始化日期時候，需要日期監聽器
      date_picker.init(year, month, day, new OnDateChangedListener() ;{
   //監聽日期的改變
   public void onDateChanged(DatePicker view, int year, int monthOfYear,
         int dayOfMonth) {
      // TODO Auto-generated method stub
      //Toast.makeText(MainActivity.this, "現在時間："+year+"-"+(monthOfYear+1)+"-"+dayOfMonth, 0).show();
//月份以0開始統計，顯示的時候要加1
       tv_date.setText("現在日期："+year+"-"+(monthOfYear+1)+"-"+dayOfMonth);   
   }
});
      //設置時間為24小時制
      time_picker.setIs24HourView(true);
     //時間監聽器
      time_picker.setOnTimeChangedListener(new OnTimeChangedListener() {   
      public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
      // TODO Auto-generated method stub
      tv_time.setText("現在時間："+hourOfDay+":"+minute);
   }
});