'Scroll to first element in the RecyclerView after adding a new item
I want when insert a new item at the first element and after notifyItemInsered it should scroll to the recently item added.
It add the element to the first with success but recyclerView.scrollTo();
is not working.
Note: The recyclerView has a setNestedScrollView to false.
I tried to do this:
newsNestedScrollView.smoothScrollTo(newsCommentTitle.getScrollX(), newsCommentTitle.getScrollY());
But it doesn't work probably.
my xml layout:
<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:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/news_details_footer_background_color"
android:focusableInTouchMode="true">
<android.support.design.widget.AppBarLayout
android:id="@+id/news_details_app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:elevation="6dp">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/news_details_collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="280dp"
android:fitsSystemWindows="true"
app:contentScrim="?colorPrimary"
app:expandedTitleTextAppearance="@android:color/darker_gray"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/news_details_main_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"
tools:src="@mipmap/news7_header_bg" />
<View
android:layout_width="match_parent"
android:layout_height="140dp"
android:layout_gravity="top"
android:background="@drawable/scrim_up_to_down" />
<View
android:layout_width="match_parent"
android:layout_height="140dp"
android:layout_gravity="bottom"
android:background="@drawable/scrim_down_to_up" />
<TextView
android:id="@+id/news_details_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginLeft="@dimen/spacing_large"
android:layout_marginTop="@dimen/spacing_large"
android:layout_marginRight="@dimen/spacing_large"
android:layout_marginBottom="@dimen/spacing_xlarge"
android:textColor="@android:color/white"
android:textSize="20sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:text="Google AI Defeats Human Go Champion" />
<TextView
android:id="@+id/news_details_time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginLeft="@dimen/spacing_large"
android:layout_marginRight="@dimen/spacing_large"
android:layout_marginBottom="@dimen/spacing_regular"
android:textColor="@android:color/white"
tools:text="15 min" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="fill_parent"
android:layout_height="?actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="@+id/news_details_nested_scroll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/spacing_huge"
android:background="@color/colorWhite"
android:fillViewport="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<!--android:layout_marginBottom="56dp"-->
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical">
<TextView
android:id="@+id/news_details_description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lineSpacingExtra="@dimen/spacing_middle"
android:padding="@dimen/spacing_large"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="sdkjsdfkjsdfjdfsk sfdjkfdsjsfk djfdsk sfdjk lfdjf dskjf fjjfdsfdj sdjkfl sdfdsklj sdfjklsfd" />
<WebView
android:id="@+id/news_details_content"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_margin="@dimen/spacing_regular"
android:lineSpacingExtra="@dimen/spacing_middle"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/news_details_description"
app:layout_constraintVertical_chainStyle="packed" />
<!--<TextView-->
<!--android:id="@+id/news_details_content"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="wrap_content"-->
<!--android:layout_marginEnd="16dp"-->
<!--android:layout_marginTop="24dp"-->
<!--android:layout_marginStart="16dp"-->
<!--android:text="aasdkjasdkljasdklj k aksdjlkd klasjd kj dkajs kj das kjasklds klj as"-->
<!--android:textSize="16sp"-->
<!--app:layout_constraintEnd_toEndOf="parent"-->
<!--app:layout_constraintTop_toBottomOf="@id/textView2"-->
<!--app:layout_constraintStart_toStartOf="parent"-->
<!--/>-->
<!--<ImageView-->
<!--android:id="@+id/imageVideo"-->
<!--android:layout_width="0dp"-->
<!--android:layout_height="200dp"-->
<!--android:scaleType="centerCrop"-->
<!--android:layout_marginTop="24dp"-->
<!--android:src="@drawable/bg_polygon"-->
<!--app:layout_constraintDimensionRatio="w,15:9"-->
<!--app:layout_constraintEnd_toEndOf="parent"-->
<!--app:layout_constraintHorizontal_bias="0.545"-->
<!--app:layout_constraintStart_toStartOf="parent"-->
<!--app:layout_constraintTop_toBottomOf="@id/news_details_content" />-->
<!--<ImageView-->
<!--android:layout_width="wrap_content"-->
<!--android:layout_height="25dp"-->
<!--app:layout_constraintBottom_toBottomOf="@id/imageVideo"-->
<!--app:layout_constraintEnd_toEndOf="@id/imageVideo"-->
<!--app:layout_constraintStart_toStartOf="@id/imageVideo"-->
<!--app:layout_constraintTop_toTopOf="@id/imageVideo"-->
<!--app:srcCompat="@drawable/ic_playback" />-->
<!--<TextView-->
<!--android:id="@+id/textView5"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="wrap_content"-->
<!--android:layout_margin="16dp"-->
<!--android:text="asdl;asd asdkl;asd d askd;lask dask ;laksd lk"-->
<!--android:textSize="16sp"-->
<!--app:layout_constraintEnd_toEndOf="parent"-->
<!--app:layout_constraintStart_toStartOf="parent"-->
<!--app:layout_constraintTop_toBottomOf="@id/imageVideo"-->
<!--/>-->
<View
android:id="@+id/above_comments_separator"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="@dimen/spacing_large"
android:background="@android:color/darker_gray"
app:layout_constraintTop_toBottomOf="@id/news_details_content" />
<TextView
android:id="@+id/news_details_comments_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/spacing_large"
tools:text="Comment (3)"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/above_comments_separator" />
<android.support.v7.widget.RecyclerView
android:id="@+id/news_details_recycler_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_marginTop="@dimen/spacing_large"
android:layout_marginBottom="@dimen/spacing_mlarge"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/news_details_comments_title"
/>
<include
android:id="@+id/news_details_load_more_progress_bar"
layout="@layout/layout_progress_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/spacing_regular"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/news_details_recycler_view" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
<RelativeLayout
android:id="@+id/news_details_add_comment_section"
android:layout_width="match_parent"
android:layout_height="@dimen/spacing_huge"
android:layout_gravity="bottom"
android:background="@color/news_details_footer_background_color"
android:focusableInTouchMode="true"
android:visibility="visible">
<android.support.design.widget.TextInputEditText
android:id="@+id/news_details_comment_input"
style="@style/NewsDetailsInput"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_toStartOf="@+id/news_details_add_comment_button"
android:gravity="center_vertical"
android:hint="@string/write_comment_hint"
android:inputType="text"
android:padding="12dp" />
<ImageButton
android:id="@+id/news_details_add_comment_button"
android:layout_width="@dimen/spacing_huge"
android:layout_height="match_parent"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:background="@android:color/transparent"
android:foreground="?selectableItemBackgroundBorderless"
android:textColor="@color/colorAccent"
app:srcCompat="@drawable/ic_send" />
<Button
android:id="@+id/news_details_edit_comment_button"
android:layout_width="@dimen/spacing_huge"
android:layout_height="match_parent"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:background="@android:color/transparent"
android:foreground="?selectableItemBackground"
android:textColor="@color/colorAccent"
android:textAllCaps="true"
android:text="@string/edit_button"
android:visibility="gone"
/>
<TextView
android:id="@+id/news_details_sign_error"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="@string/comment_user_error"
android:background="@color/news_details_footer_background_color"
android:visibility="gone"
android:textSize="12sp"
/>
</RelativeLayout>
<include
android:id="@+id/news_details_included_error"
layout="@layout/layout_error"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:visibility="gone" />
<com.wang.avi.AVLoadingIndicatorView
android:id="@+id/news_details_progress_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone"
app:indicatorColor="@color/colorPrimary" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/news_details_share_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginBottom="@dimen/spacing_mhuge"
android:visibility="gone"
app:fabSize="normal"
app:srcCompat="@drawable/ic_share" />
</android.support.design.widget.CoordinatorLayout>
Solution 1:[1]
you may have to use this:
linearLayoutManager.scrollToPositionWithOffset(pos, 0);
Solution 2:[2]
You can try this:
mRecyclerView.smoothScrollToPosition(0);
Solution 3:[3]
That is because probably when you call scroll to the position, adapter is not yet updated, so it does scroll to first position, but since adapter is not updated it looks like nothing happend. You can try:
mRecyclerView.postDelayed( {
mRecyclerView.smoothScrollToPosition(0)
}, 100)
If you give main thread a little time(100ms) to process the data in adapter and than call it, it should work.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Igor Romcy |
| Solution 2 | Hossein Golshani |
| Solution 3 | Torima |