<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".purchase.Delivery_help_purchase"
    android:background="#f2f2f2"
    android:orientation="vertical">



    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#FFFFFF"
        android:orientation="vertical"
        >
        

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:background="@drawable/kuang">
            <TextView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="2"
                android:text="有效期至 :"
                android:textSize="18sp"
                android:gravity="center"
                android:paddingLeft="10dp"
                />
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:orientation="horizontal"
                >
                <TextView
                    android:id="@+id/tv_purchase_time"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:text="设置截止时间"
                    android:textSize="18sp"
                    android:gravity="center"
                    />

            </LinearLayout>

        </LinearLayout>


    </LinearLayout>


</LinearLayout>

package com.example.express_delivery.purchase;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.TimePicker;

import com.example.express_delivery.MainActivity;
import com.example.express_delivery.Personal_PageActivity;
import com.example.express_delivery.R;
import com.example.express_delivery.activity.Address_InfoActivity;
import com.example.express_delivery.activity.Address_InfopurActivity;
import com.example.express_delivery.activity.Slide_getAddressActivity;

import java.text.DateFormat;
import java.util.Calendar;
import java.util.Locale;

public class Delivery_help_purchase extends AppCompatActivity {
private TextView tv_purchase_time;

    DateFormat format = DateFormat.getDateTimeInstance();
    Calendar calendar = Calendar.getInstance(Locale.CHINA);
    

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

        if (getSupportActionBar() != null){
            getSupportActionBar().hide();
        }

        initView();
        onclick();
    }

    private void initView() {
        
        tv_purchase_time = findViewById(R.id.tv_purchase_time);
    }

    private void onclick() {

        tv_purchase_time.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showTimePickerDialog(Delivery_help_purchase.this,0,tv_purchase_time,calendar);
                showDatePickerDialog(Delivery_help_purchase.this,0,tv_purchase_time,calendar);
            }
        });
    }/**
     * 日期选择
     * @param activity
     * @param themeResId
     * @param tv
     * @param calendar
     */
    public static void showDatePickerDialog(Activity activity, int themeResId, final TextView tv, final Calendar calendar) {
        // 直接创建一个DatePickerDialog对话框实例，并将它显示出来
        new DatePickerDialog(activity, themeResId, new DatePickerDialog.OnDateSetListener() {
            // 绑定监听器(How the parent is notified that the date is set.)
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                // 此处得到选择的时间，可以进行你想要的操作
                tv.setText("" + year + "-" + (monthOfYear + 1) + "-" + dayOfMonth + "");

            }
        }
                // 设置初始日期
                , calendar.get(Calendar.YEAR)
                , calendar.get(Calendar.MONTH)
                , calendar.get(Calendar.DAY_OF_MONTH)).show();

    }

    /**
     * 时间选择
     * @param activity
     * @param themeResId
     * @param tv
     * @param calendar
     */
    public static void showTimePickerDialog(Activity activity,int themeResId, final TextView tv, Calendar calendar) {
        // Calendar c = Calendar.getInstance();
        // 创建一个TimePickerDialog实例，并把它显示出来
        // 解释一哈，Activity是context的子类
        new TimePickerDialog( activity,themeResId,
                // 绑定监听器
                new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                        CharSequence time_date = tv.getText();
                        tv.setText(time_date+"　"+hourOfDay + " : " + minute);
                    }
                }
                // 设置初始时间
                , calendar.get(Calendar.HOUR_OF_DAY)
                , calendar.get(Calendar.MINUTE)
                // true表示采用24小时制
                ,true).show();
    }


}