HarmonyOS 应用开发 - PageSlider体验与分享 原创

PageSlider是用于页面之间切换的组件，它通过响应滑动事件完成页面间的切换。

ability_main.xml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:orientation="vertical">

    <PageSlider
        ohos:id="$+id:page_slider"
        ohos:height="300vp"
        ohos:width="300vp"
        ohos:layout_alignment="horizontal_center"/>

</DirectionalLayout>

TestPagerProvider.java代码：

package com.example.pageslider.slice;

import ohos.agp.colors.RgbColor;
import ohos.agp.components.*;
import ohos.agp.components.element.ShapeElement;
import ohos.agp.utils.Color;
import ohos.agp.utils.TextAlignment;
import java.util.List;
public class TestPagerProvider extends PageSliderProvider {
    // 数据源，每个页面对应list中的一项
    private List<DataItem> list;
    public TestPagerProvider(List<DataItem> list) {
        this.list = list;
    }
    @Override
    public int getCount() {
        return list.size();
    }
    @Override
    public Object createPageInContainer(ComponentContainer componentContainer, int i) {
        final DataItem data = list.get(i);
        Text label = new Text(null);
        label.setTextAlignment(TextAlignment.CENTER);
        label.setLayoutConfig(
                new StackLayout.LayoutConfig(
                        ComponentContainer.LayoutConfig.MATCH_PARENT,
                        ComponentContainer.LayoutConfig.MATCH_PARENT
                ));
        label.setText(data.mText);
        label.setTextColor(Color.BLACK);
        label.setTextSize(50);
        ShapeElement element = new ShapeElement();
        element.setRgbColor(RgbColor.fromArgbInt(Color.getIntColor("#AFEEEE")));
        label.setBackground(element);
        componentContainer.addComponent(label);
        return label;
    }
    @Override
    public void destroyPageFromContainer(ComponentContainer componentContainer, int i, Object o) {
        componentContainer.removeComponent((Component) o);
    }
    @Override
    public boolean isPageMatchToObject(Component component, Object o) {
        return true;
    }
    //数据实体类
    public static class DataItem{
        String mText;
        public DataItem(String txt) {
            mText = txt;
        }
    }
}

MainAbilitySlice.java代码：

package com.example.pageslider.slice;

import com.example.pageslider.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.PageSlider;

import java.util.ArrayList;

public class MainAbilitySlice extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);

        initPageSlider();
    }
    private void initPageSlider() {
        PageSlider pageSlider = (PageSlider) findComponentById(ResourceTable.Id_page_slider);
        pageSlider.setProvider(new TestPagerProvider(getData()));
    }
    private ArrayList<TestPagerProvider.DataItem> getData() {
        ArrayList<TestPagerProvider.DataItem> dataItems = new ArrayList<>();
        dataItems.add(new TestPagerProvider.DataItem("第一个页面"));
        dataItems.add(new TestPagerProvider.DataItem("第二个页面"));
        dataItems.add(new TestPagerProvider.DataItem("第三个页面"));
        dataItems.add(new TestPagerProvider.DataItem("第四个页面"));

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

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

完整代码地址：

https://gitee.com/jltfcloudcn/jump_to/tree/master/jltf_PageSlider_component