RecyclerView Scrollbar is not visible in Dialog Fragment in Android

Question

I have a dialog fragment, in which I have a recycler view. I want to add a scrollbar to the recycler view. I added scrollbars="vertical" but it's not showing up. I think the issue has something to do with the themes. Here is my xml:

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:padding="16dp"
tools:context="com.airxos.app.common.fragments.LayerSwitcherFragment">

<TextView
    android:id="@+id/layer_list_title"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:fontFamily="sans-serif"
    android:textSize="20sp"
    android:textStyle="bold"
    android:textColor="@color/black_87"
    android:text="@string/layers"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/layer_list"
    android:layout_marginTop="@dimen/margin_16"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@id/layer_list_title"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_height="0dp"
    android:maxHeight="@dimen/info_window_height"
    android:layout_width="match_parent"
    android:nestedScrollingEnabled="true"
    android:scrollbars="vertical"
    android:background="@color/white"
    android:scrollbarThumbVertical="@drawable/scrollbar"
    android:scrollbarSize="5dp"
    android:padding="5dp"
    android:scrollbarStyle="insideInset"/>
</android.support.constraint.ConstraintLayout>

I am restricting the height and width of the dialog fragment as shown below:

@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                         @Nullable Bundle savedInstanceState) {
    Objects.requireNonNull(inflater, "LayoutInflater");

    if(getDialog().getWindow() != null) {
        getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        getDialog().setCanceledOnTouchOutside(true);
    }
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_layer_switcher, container, false);
}

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    Objects.requireNonNull(view, "View");

    super.onViewCreated(view, savedInstanceState);
    layerList = view.findViewById(R.id.layer_list);
    layerList.setAdapter(new LayerListAdapter(context, layers, layerSelectionListener));
    layerList.setLayoutManager(new LinearLayoutManager(context));
}

I have already tried everything suggested in this SO question and it did not work.

Other than this I have also tried creating a drawable and adding it as scrollbarThumbVertical

I think it has something to do with the themes because even when I change the background color of constraint layout it is not showing up in the dialog.

EDIT: I am showing the dialog as shown below:

LayerSwitcherFragment switcherFragment = LayerSwitcherFragment.newInstance(layers);
FragmentTransaction ft = getChildFragmentManager().beginTransaction();
Fragment prev = getChildFragmentManager().findFragmentByTag("layer_dialog");
    if (prev != null) {
        ft.remove(prev);
    }
    ft.addToBackStack(null);
switcherFragment.show(ft, "layer_dialog");

EDIT: Issue is solved. I am sorry for wasting everyone's time. The issue was a stupid mistake we made. My DialogFragment was in a Library. We build the arr file and was using it inside the app. The issue was that we forgot to remove the dialogfragment's XML files from the main app when we refactored it to the arr library. So even after we update the files in the library, the app was picking up the old file in the main app instead of the updated file because the name of the XML was the same.

How are you showing the dialog? Can you show me the code? Are you using getSupportFragmentManager? — Alessandro Verona, Aug 12 '19 at 08:35
@Saret I have updated the code. I am gettingChildFragmentManger as you can see. — hushed_voice, Aug 12 '19 at 09:31
Try to change .show(ft, "layer_dialog") with .show(getSupportFragmentManager(), "layer_dialog") — Alessandro Verona, Aug 12 '19 at 09:42

score 1 · Answer 1 · answered Aug 09 '19 at 11:44

1

Try:

android:fadeScrollbars="false"
android:scrollbarAlwaysDrawVerticalTrack="true"

answered Aug 09 '19 at 11:44

thanks for the response.. but this also didn’t work – hushed_voice Aug 09 '19 at 11:54

karthick Murugesan · Answer 2 · 2019-08-12T08:26:55.770

1

Try This:

In XML:

  <android.support.v7.widget.RecyclerView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:scrollbars="vertical" <!-- type of scrollbar -->
        android:scrollbarThumbVertical="@android:color/darker_gray"  
        android:scrollbarSize="5dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

edited Aug 12 '19 at 08:26

answered Aug 09 '19 at 13:46

karthick Murugesan

348
2
10

Hi, thanks for the response. But please check out my code in my question. I have all the attributes you mentioned. (except having android:scrollbars="vertical" twice) But it still doesn't work – hushed_voice Aug 12 '19 at 06:44

score 1 · Answer 3 · answered Aug 12 '19 at 11:36

1

In your xml, Just set the android:scrollbars="vertical" it can work.

<android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        app:layoutManager="android.support.v7.widget.LinearLayoutManager" />

answered Aug 12 '19 at 11:36

Longalei

453
3
8

I have already did that..its not working when recyclerview is in a dialogfragment – hushed_voice Aug 13 '19 at 06:15
@free_style oh...hmmmm. I try it in my project,It can work. Have you exclude the other attributes in the recyclerview? – Longalei Aug 13 '19 at 11:03

score 0 · Answer 4 · answered Jun 25 '21 at 09:01

I know this can come kind of late. Try to use a NestedScrollView as the parent of the RecyclerView. Like this:

<androidx.core.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/layer_list_title"
            app:layout_constraintEnd_toEndOf="parent"
            android:scrollbars="vertical">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/layer_list"
        android:layout_marginTop="@dimen/margin_16"
        android:layout_height="wrap_content"
        android:maxHeight="@dimen/info_window_height"
        android:layout_width="match_parent"
        android:nestedScrollingEnabled="true"
        android:background="@color/white"
        android:padding="5dp"/>
        
</androidx.core.widget.NestedScrollView>

score 0 · Answer 5 · answered Aug 10 '21 at 08:46

I guess in DialogFragment you scrollbar is transparent

try this code

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/mTaskListRV"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:scrollbarSize="5dp"
    android:scrollbarThumbVertical="@drawable/shape_progress"
    android:scrollbarTrackVertical="@drawable/shape_round_gray"
    android:scrollbars="vertical"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    tools:listitem="@layout/cash_out_task_list_item_layout" />

RecyclerView Scrollbar is not visible in Dialog Fragment in Android

5 Answers5