鸿蒙应用开发 | 日期选择器(DatePicker)的功能和用法

简介

DatePicker主要供用户选择日期。可以设置日期选择格式，可以设置样式，效果如下：
 

用到的属性

DatePicker的共有XML属性继承自：StackLayout

实战

1，创建一个项目 添加默认 DatePicker

<DatePicker
    ohos:id="$+id:date_pick"
    ohos:height="match_content"
    ohos:width="match_parent"
    ohos:text_size="16fp"
    />

默认的日期选择器，xml配置属性中直接添加 就能显示效果，日期的格式是年月日。

 

2，设置日期的最小，最大值

<DatePicker
  ohos:id="$+id:date_pick1"
  ohos:height="match_content"
  ohos:width="match_parent"
  ohos:text_size="16fp"
  ohos:min_date="1627747200"
  ohos:max_date="1630339200"
  >
</DatePicker>

1，设置了最小和最大日期的时间戳
ohos:min_date="1627747200"  // 设置最小日期的时间戳
ohos:max_date="1630339200" // 设置最大日期的时间戳

3，设置固定年月日

<DatePicker
  ohos:id="$+id:date_pick2"
  ohos:height="match_content"
  ohos:width="match_parent"
  ohos:text_size="16fp"
  ohos:year_fixed="true"
  ohos:month_fixed="true"
  ohos:day_fixed="true"
  >
</DatePicker>

1，固定年月日 ，固定当前日期的年月日，设置后年月日无法做滚动选择
ohos:year_fixed="true"  // 固定年
ohos:month_fixed="true"    // 固定月
ohos:day_fixed="true"  // 固定日
 

4，设置日期选择器样式

<DatePicker
    ohos:id="$+id:date_pick3"
    ohos:height="match_content"
    ohos:width="match_parent"
    ohos:text_size="16fp"
 
    ohos:normal_text_color="#000000" // 设置待选项的颜色
    ohos:normal_text_size="20fp" // 设置待选项的字体大小
 
    ohos:selected_text_color="#098988" // 设置已选项的字体颜色
    ohos:selected_text_size="25fp" // 设置已选项的字体大小
 
    ohos:operated_text_color="#776655" // 设置操作项的字体颜色
 
    ohos:selected_normal_text_margin_ratio="5" // 设置DatePicker中所选文本边距与普通文本边距的比例
    ohos:wheel_mode_enabled="true" // 设置滚轮绕行
 
    ohos:top_line_element="#9370DB" // 设置选中日期的上边框
    ohos:bottom_line_element="#9370DB" // 设置选中日期的下边框
    ohos:shader_color="gray" // 设置着色器颜色
    >
</DatePicker>

5，设置当前日期

datePicker.updateDate(2021, 8, 8);// 设置当前日期

6，获取日期选择器的选择日期

datePicker.setValueChangedListener(
    new DatePicker.ValueChangedListener() {
        @Override
        public void onValueChanged(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) {
            selectedDate.setText("选择的日期："+String.format("%02d/%02d/%4d", dayOfMonth, monthOfYear, year));
        }
    }
);

完整代码：
​​​​​

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:alignment="center"
    ohos:orientation="vertical">
 
    <Text
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:margin="4vp"
        ohos:text_alignment="center|left"
        ohos:text_size="16fp"
        ohos:text="日期选择器，选择年月日 显示"
        />
 
    <DatePicker
        ohos:id="$+id:date_pick"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:text_size="16fp"
        />
 
    <Text
        ohos:id="$+id:text_date"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:hint="date"
        ohos:margin="4vp"
        ohos:text_alignment="center|left"
        ohos:text_size="16fp">
    </Text>
 
    <Text
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:margin="8vp"
        ohos:text_alignment="center|left"
        ohos:text_size="16fp"
        ohos:multiple_lines="true"
        ohos:text="日期选择器，设置最小日期 2021/08/01  最大日期 2021/08/31"
        />
    <DatePicker
        ohos:id="$+id:date_pick1"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:text_size="16fp"
        ohos:min_date="1627747200"
        ohos:max_date="1630339200"
        >
    </DatePicker>
 
    <Text
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:margin="4vp"
        ohos:text_alignment="center|left"
        ohos:text_size="16fp"
        ohos:multiple_lines="true"
        ohos:text="日期选择器，固定年月日"
        />
    <DatePicker
        ohos:id="$+id:date_pick2"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:text_size="16fp"
        ohos:year_fixed="true"
        ohos:month_fixed="true"
        ohos:day_fixed="true"
        >
    </DatePicker>
 
    <Text
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:margin="4vp"
        ohos:text_alignment="center|left"
        ohos:text_size="16fp"
        ohos:multiple_lines="true"
        ohos:text="日期选择器，设置样式"
        />
    <DatePicker
        ohos:id="$+id:date_pick3"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:text_size="16fp"
 
        ohos:normal_text_color="#000000"
        ohos:normal_text_size="20fp"
 
        ohos:selected_text_color="#098988"
        ohos:selected_text_size="25fp"
 
        ohos:operated_text_color="#776655"
 
        ohos:selected_normal_text_margin_ratio="5"
        ohos:wheel_mode_enabled="true"
 
        ohos:top_line_element="#9370DB"
        ohos:bottom_line_element="#9370DB"
        ohos:shader_color="gray"
        >
    </DatePicker>
 
 
</DirectionalLayout>

package com.example.datepicker.slice;
 
import com.example.datepicker.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.DatePicker;
import ohos.agp.components.Text;
 
public class MainAbilitySlice extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
 
        // 获取DatePicker实例
        DatePicker datePicker = (DatePicker) findComponentById(ResourceTable.Id_date_pick);
        int day = datePicker.getDayOfMonth();
        int month = datePicker.getMonth();
        int year = datePicker.getYear();
//        datePicker.updateDate(2021, 8, 8);// 设置当前日期
        Text selectedDate = (Text) findComponentById(ResourceTable.Id_text_date);
        datePicker.setValueChangedListener(
            new DatePicker.ValueChangedListener() {
                @Override
                public void onValueChanged(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) {
                    selectedDate.setText("选择的日期："+String.format("%02d/%02d/%4d", dayOfMonth, monthOfYear, year));
                }
            }
        );
    }
 
    @Override
    public void onActive() {
        super.onActive();
    }
 
    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }
}

源码：
https://gitee.com/codegrowth/haomony-develop/tree/master/DatePicker

————————————————

                            版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
                        
原文链接：https://blog.youkuaiyun.com/jianpengxuexikaifa/article/details/118583726