public class DateActivity extends Activity{    private TimePicker timePicker;    private DatePicker datePicker;    private Calendar cal;    private int year;    private int month;    private int day;    private int hour;    private int minute;    @TargetApi(Build.VERSION_CODES.N)    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activeity_date);        //获得日历的一个对象        cal = Calendar.getInstance();        //获取年月日时分秒的信息        year = cal.get(Calendar.YEAR);        month = cal.get(Calendar.MONTH);        day = cal.get(Calendar.DAY_OF_MONTH);        hour = cal.get(Calendar.HOUR_OF_DAY);        minute = cal.get(Calendar.MINUTE);        setTitle(year+"-"+month+"-"+day+"-"+hour+"-"+minute);        datePicker = (DatePicker)findViewById(R.id.datePicker);        //datePicker初始化        datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() {            @Override            public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {                setTitle(year+"-"+monthOfYear+"-"+dayOfMonth);            }        });        //timePicker初始化        timePicker = (TimePicker)findViewById(R.id.timePicker);        timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {            @Override            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {                setTitle(hourOfDay+"-"+minute);            }        });        //对话框的形式//        new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {//            @Override//            public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {//                setTitle(year+"-"+month+"-"+dayOfMonth);//            }//        },year,month,day).show();        new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {            @Override            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {                    setTitle(hourOfDay+"-"+minute);            }        },hour,minute,true).show();    }}