Android DatePicker和TimePicker

1.在 xml中布置Datepicker和TimePicker

    <DatePicker android:id="@+id/dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <TimePicker android:id="@+id/tp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

2.在Activity中初始化

    private TimePicker tp;
    private DatePicker dp;
    protected void onCreate(Bundle savedInstanceState) {
        ....
        dp=(DatePicker)findViewById(R.id.dp);
        tp=(TimePicker)findViewById(R.id.tp);
     }

3.初始化calendar类

    private Calendar cl;
    private int year,month,day,hour,minute;
    protected void onCreate(Bundle savedInstanceState) {
          ·····
        cl=Calendar.getInstance();
        year=cl.get(Calendar.YEAR);
        month=cl.get(Calendar.MONTH)+1;
        day=cl.get(Calendar.DAY_OF_MONTH);
        hour=cl.get(Calendar.HOUR_OF_DAY);
        minute=cl.get(Calendar.MINUTE);
        setTitle(year+"-"+month+"-"+day+"-"+hour+"-"+minute);
    }

WARNING

month=cl.get(Calendar.MONTH)+1;

其中get(Calendar.MONTH)方法得到的数从0开始

setTitle(year+"-"+month+"-"+day+"-"+hour+"-"+minute);

该代码用于改变标题

4.初始化DatePicker的日期

        dp.init(year, cl.get(Calendar.MONTH), day, new OnDateChangedListener() {
            
            @Override
            public void onDateChanged(DatePicker view, int year, int monthOfYear,
                    int dayOfMonth) {
                // TODO Auto-generated method stub
                setTitle(year+"-"+(monthOfYear+1)+"-"+dayOfMonth);
            }
        });

WARNING

dp.init(year, cl.get(Calendar.MONTH), day, new OnDateChangedListener()

该方法中，月份需要用从0开始的Calendar.MONTH

setTitle(year+"-"+(monthOfYear+1)+"-"+dayOfMonth);

传入参数为从0开始的月数，在传出时需要+1

5.初始化TimePicker的时间，并实现时间选择器

        tp.setOnTimeChangedListener(new OnTimeChangedListener() {
            
            @Override
            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                // TODO Auto-generated method stub
                setTitle(hourOfDay+":"+minute);
            }
        });

6.实现日期选择对话框和时间选择对话框

        new DatePickerDialog(this,new OnDateSetListener() {
            
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear,
                    int dayOfMonth) {
                // TODO Auto-generated method stub
                setTitle(year+"-"+(monthOfYear+1)+"-"+dayOfMonth);
            }
        }, year,cl.get(Calendar.MONTH), day).show();


        new TimePickerDialog(this, new OnTimeSetListener() {
            
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                // TODO Auto-generated method stub
                setTitle(hourOfDay+":"+minute);
            }
        }, hour, minute, true).show();

同理，注意传入的是Calendar.MONTH是以0开头的月数
new TimePickerDialog()方法的最后一个参数是是否选择24小时制(true or false)