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>