什么是PageSlider

PageSlider是用于实现整页切换.效果图：

基础用法

1. 在主布局文件"ability_main.xml"中增加PageSlider

   <PageSlider
        ohos:id="$+id:pager_slider"
        ohos:height="match_parent"
        ohos:width="match_parent"/>

2. 在Slice中实例化PageSlider,设置数据

public class MainAbilitySlice extends AbilitySlice {

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

        PageSlider pageSlider = (PageSlider) findComponentById(ResourceTable.Id_pager_slider);
        LayoutScatter layoutScatter = LayoutScatter.getInstance(getContext());
        Component component1 = layoutScatter.parse(ResourceTable.Layout_page1, null, false);
        Component component2 = layoutScatter.parse(ResourceTable.Layout_page2, null, false);

        List<Component> components = new ArrayList<>();
        components.add(component1);
        components.add(component2);
        pageSlider.setProvider(new PageSliderProvider() {
            @Override
            public int getCount() {
                return components.size();
            }

            @Override
            public Object createPageInContainer(ComponentContainer componentContainer, int i) {
                componentContainer.addComponent(components.get(i));
                return components.get(i);
            }

            @Override
            public void destroyPageFromContainer(ComponentContainer componentContainer, int i, Object o) {
                componentContainer.removeComponent(components.get(i));
            }

            @Override
            public boolean isPageMatchToObject(Component component, Object o) {
                return component == o;
            }
        });
    }
}

3. 两个页面对应代码：

• page1.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">

    <Text
        ohos:height="match_parent"
        ohos:width="match_parent"
        ohos:text="PageSlider1"
        ohos:text_alignment="center"
        ohos:text_size="25fp"/>
</DirectionalLayout>

• page2.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">

    <Text
        ohos:height="match_parent"
        ohos:width="match_parent"
        ohos:text="PageSlider2"
        ohos:text_alignment="center"
        ohos:text_size="25fp"/>
</DirectionalLayout>

完整源代码

https://gitee.com/hspbc/harmonyos_demos/tree/master/pageSliderDemo

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厦门大学计算机专业 | 前华为工程师
分享编程技术，没啥深度，但看得懂，适合初学者。
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