public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private TimePicker timePicker;
private DatePicker datePicker;
private Calendar cal;
private TextView ok,okTime;
private int year;
private int moth;
private int day;
private int hour;
private int minute;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);timePicker=findViewById(R.id.timePicker);datePicker=findViewById(R.id.dataPicker);ok=findViewById(R.id.ok);ok.setOnClickListener(this);okTime=findViewById(R.id.okTime);okTime.setOnClickListener(this);//获取日历对象cal=Calendar.getInstance();//获取年月日时分秒year=cal.get(Calendar.YEAR);moth=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+"-"+moth+"-"+day+"-"+hour+"-"+minute);//初始化datePicker
datePicker.init(year, cal.get(Calendar.MONTH), day, new DatePicker.OnDateChangedListener() {@Overridepublic void onDateChanged(DatePicker datePicker, int i, int i1, int i2) {setTitle(i+"-"+(i1+1)+"-"+i2);
//上面1是月份因为获取默认为0所以要加上1}
});
//timePicker不需要初始化直接监听timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {@Overridepublic void onTimeChanged(TimePicker timePicker, int i, int i1) {setTitle(i+":"+i1);//显示在导航栏中}});}}

 @Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.ok:  //绑定监听器DatePickerDialog.OnDateSetListener   listener = new DatePickerDialog.OnDateSetListener() {@Overridepublic void onDateSet(DatePicker datePicker, int i, int i1, int i2) {setTitle(i+"-"+(i1+1)+"-"+i2);}};// // 直接创建一个DatePickerDialog对话框实例，并将它显示出来new DatePickerDialog(MainActivity.this,listener,year,cal.get(Calendar.MONTH),day).show();break;case R.id.okTime:TimePickerDialog.OnTimeSetListener  timeSetListener=new TimePickerDialog.OnTimeSetListener() {@Overridepublic void onTimeSet(TimePicker timePicker, int i, int i1) {setTitle(i+":"+i1);  }};new TimePickerDialog(MainActivity.this,timeSetListener,hour,minute,true).show();break;}

点击DateDialog