I have a RecyclerView inside a NestedScrollView:
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="#dimen/_100sdp">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view_chat"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="#dimen/_100sdp"
android:layout_marginLeft="#dimen/_30sdp"
android:layout_marginRight="#dimen/_30sdp"
android:background="#color/bright_grey"
></android.support.v7.widget.RecyclerView>
</android.support.v4.widget.NestedScrollView>
My RecyclerView is being filled with items in onCreate()
On a device you would see the first item of the RecyclerView on the very top und would have to scroll down the NestedScrollView in order to see the last item.
Since my items are chat message sorted by the time sent I need the NestedScrollView to be scrolled all the way down so users would see the latest chat message first without having to scroll in the first place.
Any ideas on this?
Given that your RecyclerView is the only child of your NestedScrollView, you would be better off removing the NestedScrollView altogether, and instead applying the fixed height to the RecyclerView. Something like this:
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view_chat"
android:layout_width="match_parent"
android:layout_height="#dimen/_100sdp"
android:layout_marginLeft="#dimen/_30sdp"
android:layout_marginRight="#dimen/_30sdp"
android:background="#color/bright_grey" />
Doing this allows you to have the RecyclerView itself manage scrolling, rather than the parent scroll view. And that allows you to leverage a property of LinearLayoutManager to achieve what you want.
Reverse layout -- setting this will "invert" your list; the first item in your adapter will appear at the bottom of the list, and the default scroll position of the RecyclerView will be to scroll all the way to the bottom.
https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager.html#setReverseLayout(boolean)
LinearLayoutManager lm = new LinearLayoutManager(this);
lm.setReverseLayout(true);
If you have the same issue and want to keep the NestedScrollView.
It will work 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)
For me, it didn't work without delay.
Related
I know it is not a good approach, but I have a layout with similar structure:
ScrollView
RelativeLayout (with TabLayout,textViews, ImageViews etc)
RecyclerView
RelativeLayout (with textViews, ImageViews etc)
The recyclerView part is dynamic, so it may have 1 TextView with ImageView, but it can have max. 4-5 lines of elements.
This is working fine, but when there are more items in recyclerView, then that section starts to scroll.
That's what I want to disable.
My RecyclerView part:
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerview2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
I added to the RecyclerView this line:
android:nestedScrollingEnabled="false"
So now the scrolling is disabled for that section, but now I don't see all items in RecyclerView.
How can I disable scrolling and keep the full height to see all the content there?
When I'm scrolling down, the items above the RecyclerView does not scroll unless I start touching from the layout above, and it only scrolls down when I have reached the end of the RecyclerView.
<NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout>
<Some other items.../>
</LinearLayout>
<RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</NestedScrollView>
Note:
I actually use a fixed size for the RecyclerView, setting it via the code below:
float height_recyclerview = (ScreenUtil.getHeight(context) - (height_banner + height_bottom_navigation + height_create_post));
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, (int) height_recyclerview);
rv.setLayoutParams(layoutParams);
Why do I use fixed size if it works smoothly with wrap_content?
I will be displaying possibly thousands of items that may have
images, which will hurt performance if it does not actually do
recycling because of the issue that the RecyclerView is inside the
NestedScrollView
I have implemented an EndlessRecyclerViewScrollListener which has an
issue that it keeps loading more data from server continuously if
implemented with a RecyclerView that is within whatever scrollable
view, or if it is in a scrollable view, but does not have a fixed
height, even if you are not scrolling down.
I have tried the following:
set nested scrolling to false on the recycler view
try using scroll view instead of nested scroll view
a bunch of other code related to layouts and scrolling behaviors that others suggested which didn't work for me because I'm implementing it in a much more complicated layout and the fact that I use EndlessRecyclerViewScrollListener
What I want to fix?
I want to make the page scroll like a single page, not as a separate scrollable view.
Note that my recycler view has a fixed height that takes the entire screen's space meaning that its height is actually fit assuming that the linear layout above is not visible anymore if the user has scrolled down.
The ideal scenario is to make the scrollview scroll down first, to make the recycler view take the entire screen, so that the recyclerview will scroll however the user wants to.
Then the linearlayout above which should not be visible anymore if the recycler view has taken up all the space of the screen, should only show up if the recycler view has reached the top/first item, if the user keeps scrolling back up.
Read this.
Add app:layout_behavior="#string/appbar_scrolling_view_behavior" to your recycler xml.
<android.support.v7.widget.RecyclerView
android:id="#+id/conversation"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
NestedScrollView Smooth Scrolling
recyclerView.isNestedScrollingEnabled = true
Do this programmatically
<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="0dp"
android:fillViewport="true"
...
I want to add items to my recyclerview and that my scrollbar is updated accordingly.
Here is my RecyclerView :
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="300dp"
android:scrollbars="vertical"
android:scrollbarThumbVertical="#color/clear_grey"
android:fadeScrollbars="false"
/>
After adding an element to my dataset, I am calling
recyclerViewAdapter.notifyItemInserted(recyclerViewAdapter.getItemCount() - 1);
The problem is, the scrollbar is not updated : I have to touch the views for it to be updated.
I was using
recyclerViewAdapter.notifyDataSetChanged();
The scrollbar is updated, but I can't use this solution. (I need to be able to select text from the views, which is impossible with notifyDataSetChanged.)
Any ideas on how to update the scrollbar ?
Turns out I had set fixedSize to true :
recyclerView.setHasFixedSize(true);
And thanks to this https://stackoverflow.com/a/40373122/2437227,
I tried without it and it works.
I have used Recycler View Inside Nested Scroll View(which is within CoordinatorLayout):
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/sections_recycler_view_linearlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
Within the adapter of above recycler I have added Child Recycler Views programatically using setNestedScrollingEnabled as false.
My Issue is:
When I am scrolling the child recycler, as soon as its scroll is completed the parent recycler scrolls to top, as if I am setting its adapter again. I have not added any code to notify adapter or to scroll to top-most recycler item or to set adapter again. I could not figure out the reason for this strange behavior.
Any help would be highly appreciated.. !!!
Add to your parent Recycler View:
android:descendantFocusability="blocksDescendants"
I was display progress bar in child recycler views until I receive data from server. And once I get data I was populating it. I had used staggered Adapter for child recyclers with row count 2 and hence after data got populated my parent recyler's height was changing.
I used setHasFixedSize(false) for parent recycler view as its height was changing and I have not seen the issue again till now.
Easy,
Add
android:fillViewport="true"
to your NestedScrollview and you will be good to go.
This question already has answers here:
RecyclerView inside ScrollView is not working
(26 answers)
Closed 7 years ago.
I'm trying to show horizontal recyclerview items and vertical recyclerview items inside an ScrollView
Scrollview didn't work even If i use android:fillViewport="true"
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
//Horizontal Recyclerview items
<RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content">
</RecyclerView>
//vertical Recyclerview items
<RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"></RecyclerView>
</LinearLayout>
</ScrollView>
You should use NestedScrollView instead. However you may need to write your own LayoutManager. Check out this SO Answer for more details
You need to use a custom layout manager to use recyclerview inside a scrollview.
You can remove the scrollview and make a header item in the vertical recyclerview which contain the horizontal recyclerview.
Also you should not use a recyclerview inside a scrollview. So think the second approach will be better.
Also you can can use Snap-RecyclerView-Utils.
It has a linear layout manager for recyclerview inside a scroll view and an adapter which can help you make a header containing you horizontal recyclerview.
ScrollView can only have one child.
Remove your RelativeLayout and try again.
Apart from that android:layout_height in ScrollView should be set to wrap_content
Additionally I'm not quite sure, if it works, since in the Docs it is stated that
You should never use a ScrollView with a ListView, because ListView takes care of its own vertical scrolling. Most importantly, doing this defeats all of the important optimizations in ListView for dealing with large lists, since it effectively forces the ListView to display its entire list of items to fill up the infinite container supplied by ScrollView.
Maybe a NestedScrollView works since it is for
NestedScrollView is just like ScrollView, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android. Nested scrolling is enabled by default.