BubblePopupWindow

dependencies {
...
implementation 'com.gitee.archermind-ti:bubble-popup-window-ohos:1.0.0-beta'
...
}

BubblePopupWindow leftTopWindow = new BubblePopupWindow(MainActivity.this);
Component bubbleView = LayoutScatter.getInstance(getContext()).parse(ResourceTable.Layout_popup_layout, null, false);
leftTopWindow = new BubblePopupWindow(MainAbilitySlice.this, null);
leftTopWindow.setBubbleView(bubbleView);
leftTopWindow.show(component, LayoutAlignment.BOTTOM);

<com.yuyh.library.BubbleRelativeLayout
    ohos:height="match_content"
    ohos:width="match_content"
    app:cornerRadius="10"
    app:halfBaseOfLeg="18vp"
    app:padding="18vp"
    app:shadowColor="#64000000"
    app:strokeWidth="5"
    ohos:center_in_parent="true"
    ohos:background_element="$graphic:bubble">
<Text
    ohos:height="match_content"
    ohos:width="match_content"
    ohos:text="добро пожаловать"
    ohos:text_size="20fp"
    ohos:multiple_lines="true"
    ohos:id="$+id:mytext"/>
</com.yuyh.library.BubbleRelativeLayout>