我正在尝试找出如何在导航页下方跟踪导航栏的位置，以便导航栏到达顶部时，它会粘在顶部，直到您返回为止。我在stackoverflow和其他示例中尝试了很多选项，但是没有运气。

这是我的代码。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Mainactivity">

    <LinearLayout
        android:id="@+id/no_internet"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:visibility="gone"
        android:background="#e8eaf6"
        android:layout_centerInParent="true"
        android:gravity="center" >

        <ImageView
            android:layout_width="70dp"
            android:layout_height="70dp"
            android:src="@drawable/no_wifi" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#404852"
            android:gravity="center"
            android:textSize="25dp"
            android:text="Internet indisponible" />

    </LinearLayout>
</RelativeLayout>

以及导航组件的html

import {
 Component,OnInit,HostListener,ElementRef,ViewChild,AfterViewInit
} from "@angular/core";
import { ScrollDispatcher } from "@angular/cdk/scrolling";

@Component({
selector: "app-nav",templateUrl: "./nav.component.html",styleUrls: ["./nav.component.css"]
})
export class NavComponent implements OnInit,AfterViewInit {
 @ViewChild("stickyMenu",{ static: true }) menuElement: ElementRef;

 sticky: boolean = false;
 elementPosition: any;

   constructor(
  private el: ElementRef,private scrollDispatcher: ScrollDispatcher
) {}

 ngOnInit() {
  window.addEventListener("scroll",this.onWindowScroll,true);
}

ngAfterViewInit() {
this.scrollDispatcher
  .ancestorScrolled(this.el)
  .subscribe(event => this.onWindowScroll());
this.elementPosition = this.menuElement.nativeElement.offsetTop;
}

@HostListener("window:scroll",['$event'])
onWindowScroll() {
const windowScroll = window.pageYOffset;
console.log("sss",windowScroll,this.elementPosition);
}
 }