简单的设置时间

      本文主要涉及DatePickerDialog与TimePickerDialog的使用，来看一个小小程序吧！作为一个Android小小白，把两个类合在了一起使用

本来还在想难道两个类都要同时继承Activity?!然后想想想，最后试试试！！终于把书上讲得两个类拼在了一起使用，单独得来设置日期与时刻，

的确，很多东西要去尝试才能得出结果，哪怕是错误的，至少你知道了，目前你的办法是行不通的。多尝试！这里直接把文件名设置成了TimePickDialogExample

具体TimePickDialogExample.java代码如下：

package com.example.lenovo.A1103;


import android.app.TimePickerDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;

import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

public class TimePickerDialogExample extends AppCompatActivity {
    private TextView showDate;
    private Button setDate;
    private TextView showTime;
    private Button setTime;
    private int year;
    private int month;
    private int day;
    private int hours;
    private int minus;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        showDate = (TextView) findViewById(R.id.showDate);
        setDate = (Button) findViewById(R.id.setDate);
        showTime = (TextView) findViewById(R.id.showTime);
        setTime = (Button) findViewById(R.id.setTime);

        Calendar myCalendar = Calendar.getInstance(Locale.CHINA);
        Date myDate = new Date();
        myCalendar.setTime(myDate);
        year = myCalendar.get(Calendar.YEAR);     //获取Calendar对象中的年
        month = myCalendar.get(Calendar.MONTH);
        day = myCalendar.get(Calendar.DAY_OF_MONTH);
        hours = myCalendar.get(Calendar.HOUR_OF_DAY);
        minus = myCalendar.get(Calendar.MINUTE);
        showDate.setText(year + "-" + (month + 1) + "-" + day);
        showTime.setText(hours + ":" + minus);

        setDate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                android.app.DatePickerDialog dpd = new android.app.DatePickerDialog(TimePickerDialogExample.this,
                        new android.app.DatePickerDialog.OnDateSetListener() {
                            @Override
                            public void onDateSet(DatePicker view, int myYear, int monthOfYear, int dayOfMonth) {
                                showDate.setText(myYear + "-" + (monthOfYear + 1) + "-" + dayOfMonth);
                                year = myYear;
                                month = monthOfYear;
                                day = dayOfMonth;
                            }
                        }, year, month, day);
                //这是一整个构造函数，四个参数
                dpd.show();
            }
        });
        setTime.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                TimePickerDialog tpd = new TimePickerDialog(TimePickerDialogExample.this,
                        new TimePickerDialog.OnTimeSetListener() {
                            @Override
                            public void onTimeSet(TimePicker view, int hourOfDay, int myMinute) {
                                showTime.setText(hourOfDay + ":" + myMinute);
                            }
                        }, hours, minus, false);
                tpd.show();//显示TimePickerDialog组件
            }
        });

    }

}

layout/main_xml代码如下：

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
  <TextView
    android:id="@+id/showDate"
      android:text="tv"
      android:textSize="30sp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#ffff0101" />
        <TextView
            android:id="@+id/showTime"
            android:text="tv"
            android:textSize="30sp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#fff010"
            android:layout_marginLeft="30dp"/>
        </LinearLayout>
    <Button
        android:layout_marginTop="30dp"
        android:id="@+id/setDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置日期" />
    <Button
        android:id="@+id/setTime"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置时间"
        />

</LinearLayout>