17.鸿蒙HarmonyOS App(JAVA)滑动选择器

每天进步一点点,成功在久不在速

滑动选择器

 

 

 //设置文本样式

picker.setNormalTextFont(Font.DEFAULT_BOLD);
picker.setNormalTextSize(40);
picker.setNormalTextColor(new Color(Color.getIntColor("#FFA500")));
picker.setSelectedTextFont(Font.DEFAULT_BOLD);
picker.setSelectedTextSize(40);
picker.setSelectedTextColor(new Color(Color.getIntColor("#00FFFF")));

//设置边框

ShapeElement shape = new ShapeElement();
shape.setShape(ShapeElement.RECTANGLE);
shape.setRgbColor(RgbColor.fromArgbInt(0xFF40E0D0));
// 单独设置上边框
// picker.setDisplayedLinesTopElement(shape); 
// 单独设置下边框
// picker.setDisplayedLinesBottomElement(shape);
// 同时设置上下边框
picker.setDisplayedLinesElements(shape, shape); 

设置着色器

<Picker
    ohos:id="$+id:picker2"
    ohos:height="match_content"
    ohos:width="match_parent"
    ohos:normal_text_size="20vp"
    ohos:selected_text_size="26vp"
    ohos:top_margin="10vp"
    ohos:max_value="33"
    ohos:min_value="16"
    ohos:background_element="#686EA8EF"
    ohos:shader_color="#FF1EFF34"
    />

ability_main.xml

<?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:id="$+id:text_helloworld3"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="$graphic:background_ability_main"
        ohos:layout_alignment="horizontal_center"
        ohos:text="每天进步一点点"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_helloworld3a"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="#FFA5F383"
        ohos:layout_alignment="horizontal_center"
        ohos:text="成功在久不在速"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_helloworld"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="$graphic:background_ability_main"
        ohos:layout_alignment="horizontal_center"
        ohos:text="$string:mainability_HelloWorld"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_helloworld2"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="#FFA5F383"

        ohos:layout_alignment="horizontal_center"
        ohos:text="滑动选择器"
        ohos:text_size="40vp"
        />
    <Picker
        ohos:id="$+id:picker2"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:normal_text_size="20vp"
        ohos:selected_text_size="26vp"
        ohos:top_margin="10vp"
        ohos:max_value="33"
        ohos:min_value="16"
        ohos:background_element="#686EA8EF"
        ohos:shader_color="#FF1EFF34"
        />
    <Picker
        ohos:id="$+id:picker2a"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:normal_text_size="20vp"
        ohos:selected_text_size="26vp"
        ohos:top_margin="10vp"
        ohos:background_element="#686EA8EF"
        />

</DirectionalLayout>

 MainAbilitySlice.java

package com.example.myapplication.slice;

import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.colors.Color;
import ohos.agp.colors.RgbColor;
import ohos.agp.components.Picker;
import ohos.agp.components.element.Element;
import ohos.agp.components.element.ShapeElement;

public class MainAbilitySlice extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
        //对滑动选择器进行配置
        Picker picker = (Picker) findComponentById(ResourceTable.Id_picker2);
        picker.setCompoundElementPadding(50);//设置文本左右两侧的图形元素边距
        picker.setSelectorItemNum(3);//选项显示的数量
        设置文本左右两侧的图形元素
        picker.setElementFormatter(new Picker.ElementFormatter() {
            @Override
            public Element leftElement(int i) { //左侧
                ShapeElement element = new ShapeElement();
                element.setRgbColor(new RgbColor(0,0,255));
                return element;
            }

            @Override
            public Element rightElement(int i) {
                return null;
            }
        });
        //将索引转换为格式化文本
        picker.setFormatter(new Picker.Formatter() {
            @Override
            public String format(int i) {
                return "选项："+i;
            }
        });
        //批量设置字符串方式显示
        Picker picker2a = (Picker) findComponentById(ResourceTable.Id_picker2a);
        picker2a.setCompoundElementPadding(50);//设置文本左右两侧的图形元素边距
        picker2a.setSelectorItemNum(3);//选项显示的数量
        picker2a.setDisplayedData(new String[]{"上海","北京","山东","江苏","海南"});


    }

    @Override
    public void onActive() {
        super.onActive();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }
}

原文地址：https://blog.csdn.net/txwtech/article/details/135708048

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