android—DatePicker 和TimePicker显示日期以及使用TimePickerDialog,DatePickerDialog来专门实现时间选择对话框

datePicker 和timePicker 显示日期和时间的控件
1.二个控件初始化
2.int定义 年 月 日 时 分
3.Calendar  类时间操作 创建Calendar对象 要 Calendar.getinStance();
4.    year=calendar.get(Calendar.Year);
        Month=calendar.get(Calendar.MONTH)+1;//初始化为0；
        Day=calendar.get(Calendar.DAY_OF_MONTH);
        Hour=calendar.get(Calendar.HOUR_OF_DAY);
        Minute=calendar.get(Calendar.MINUTE);
5.设置头时间 settile（year + "-" + Month + "-" + Day + " " + Hour + ":" + Minute）;
6.  设置监听事件来可以修改时间
        datePicker.init(year, calendar.get(Calendar.MONTH), Day, new DatePicker.OnDateChangedListener() {
                @Override
                public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                setTitle(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);
                }
               });
        timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
                @Override
                public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                setTitle(hourOfDay + ":" + minute);
                }
                });
7.使用TimePickerDialog来专门实现时间选择对话框
     new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
          @Override
          public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
              setTitle(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);
          }
      }, year, calendar.get(Calendar.DAY_OF_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();

    MainActivity

package com.example.wuzuo.timedemo;

import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.CalendarView;
import android.widget.DatePicker;
import android.widget.TimePicker;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {
    private DatePicker datePicker;
    private TimePicker timePicker;
    private Calendar   calendar;
    private  int year;
    private  int Month;
    private  int Day;
    private  int Hour;
    private  int Minute;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        calendar=Calendar.getInstance();
        year=calendar.get(Calendar.YEAR);
        Month=calendar.get(Calendar.MONTH)+1;
        Day=calendar.get(Calendar.DAY_OF_MONTH);
        Hour=calendar.get(Calendar.HOUR_OF_DAY);
        Minute=calendar.get(Calendar.MINUTE);
        datePicker= (DatePicker) findViewById(R.id.datePicker1);
        timePicker= (TimePicker) findViewById(R.id.timePicker1);
        setTitle(year + "-" + Month + "-" + Day + " " + Hour + ":" + Minute);
        datePicker.init(year, calendar.get(Calendar.MONTH), Day, new DatePicker.OnDateChangedListener() {
            @Override
            public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                setTitle(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);
            }
        });
        timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
            @Override
            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                setTitle(hourOfDay + ":" + minute);
            }
        });
      new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
          @Override
          public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
              setTitle(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);
          }
      }, year, calendar.get(Calendar.DAY_OF_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();
    }
}

activity_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <DatePicker
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="3"
        android:id="@+id/datePicker1"
       />
    <TimePicker
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="5"
        android:id="@+id/timePicker1"
        />
</LinearLayout>