CODEWITHSUNDEEP
android
Darshana
Darshana

Reputation: 453

Recycleview scroll to a position not working inside Nestedscrollview

I have implemented a recycleview inside a nested scroll view. But recycle view scroll to position methods are not working.

Below is my sample code

  <?xml version="1.0" encoding="utf-8"?>
  <android.support.v4.widget.NestedScrollView 
    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="wrap_content"
    android:paddingBottom="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

 <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical">


  <android.support.v7.widget.RecyclerView
      android:id="@+id/list_view"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

 </LinearLayout>

</android.support.v4.widget.NestedScrollView>

below is the method for scrolling

RecyclerView.SmoothScroller smoothScroller = new LinearSmoothScroller(this) {
                @Override
                protected int getVerticalSnapPreference() {
                    return LinearSmoothScroller.SNAP_TO_START;
                }
            };
            smoothScroller.setTargetPosition(pos);
            recyclerView.getLayoutManager().startSmoothScroll(smoothScroller);

Upvotes: 10

Views: 9120

Answers (7)

Gabor
Gabor

Reputation: 146

The thing is that you need to scroll the NestedScrollView, not the RecyclerView. E.g:

final float y = recyclerView.getChildAt(selectedItem.getPos()).getY(); 

scrollView.smoothScrollTo(0, y)

Upvotes: 8

Darshana
Darshana

Reputation: 453

This is how I resolve this issue

first get recycle view position that need to scroll using below method

final float y = recyclerView.getChildAt(selectedItem.getPos()).getY();

Then scroll nested scroll view to that position

nestedScrollingView.post(new Runnable() {
                    @Override
                    public void run() {
                        nestedScrollingView.fling(0);
                        nestedScrollingView.smoothScrollTo(0, (int) y);
                    }
                });

Don't forget to add android:fillViewport="true" on nestedscrollview

Upvotes: 20

Abdullqadir
Abdullqadir

Reputation: 91

In my case, it worked like this.

Handler(Looper.getMainLooper()).postDelayed({
                        binding.nestedScrollView.smoothScrollTo(
                            0,
                            binding.recyclerview.measuredHeight,
                            500
                        )
                        // binding.nestedScrollView.scrollTo(0, binding.recyclerview.measuredHeight)
                        // binding.nestedScrollView.smoothScrollTo(0, binding.recyclerview.measuredHeight)
                    }, 50L)

Upvotes: 0

xaldarof
xaldarof

Reputation: 95

You can use this extenstion function.

fun RecyclerView.nestedScrollTo(position:Int,nestedScrollView: NestedScrollView) {
    val y = getChildAt(position).y

    nestedScrollView.fling(0)
    nestedScrollView.smoothScrollTo(0,y.toInt())
}

Upvotes: 2

Dino Sunny
Dino Sunny

Reputation: 1051

<android.support.design.widget.CoordinatorLayout
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"
android:fitsSystemWindows="true"
tools:context=".MainActivity">

<android.support.design.widget.AppBarLayout
    android:id="@+id/appBar"
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    android:fitsSystemWindows="true">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsingToolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginStart="48dp"
        app:expandedTitleMarginEnd="64dp"
        app:title="Scroll">

        <ImageView
            android:id="@+id/toolbarImage"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            android:fitsSystemWindows="true"
            android:src="@mipmap/ic_launcher"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:layout_collapseMode="pin" />
    </android.support.design.widget.CollapsingToolbarLayout>

</android.support.design.widget.AppBarLayout>

    <android.support.v7.widget.RecyclerView
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:id="@+id/recycler_view"
        android:scrollbars="vertical"
        android:nestedScrollingEnabled="false"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

Remove the NestedScrollView and add 

app:layout_behavior="@string/appbar_scrolling_view_behavior"

to your Recyclerview.Then ScrollToPosition works fine.

Upvotes: 1

Anton Prokopov
Anton Prokopov

Reputation: 641

Use this:

yourRecyclerView.setNestedScrollingEnabled(false);

It may solve your problem.

Upvotes: -2

hasan_shaikh
hasan_shaikh

Reputation: 1480

Try this,

new Handler().postDelayed(new Runnable() {
@Override
public void run() {
    recyclerview.scrollToPosition(position);
}
}, 200);

Upvotes: 0

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