Why ChipGroup inside HorizontalScrollView with Chip's marginEnd not working?

Question

I have Chips inside ChipGroup and this ChipGroup inside HorizontalScrollView. But my problem is marginEnd on last Chip not working!

I'm tried change layout params programmatically, but not successfull

<HorizontalScrollView
    android:id="@+id/chips_container"
    android:layout_width="0dp"
    android:layout_height="56dp"
    android:layout_gravity="center_vertical"
    android:visibility="gone"
    app:layout_constraintBottom_toTopOf="@+id/dividerSmartReplies"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    tools:visibility="visible">

    <com.google.android.material.chip.ChipGroup
        android:id="@+id/chip_group"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        app:chipSpacing="8dp"
        app:singleLine="true"
        app:singleSelection="true">

        <com.google.android.material.chip.Chip
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="42dp"
            android:layout_marginStart="8dp"
            android:textColor="@color/selector_smart_reply_chip_text"
            app:checkedIconVisible="false"
            app:chipBackgroundColor="@color/selector_smart_reply_chip"
            app:chipCornerRadius="21dp"
            app:chipStrokeColor="@color/app_base_blue"
            app:chipStrokeWidth="1dp" />

        <com.google.android.material.chip.Chip
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="42dp"
            android:textColor="@color/selector_smart_reply_chip_text"
            app:checkedIconVisible="false"
            app:chipBackgroundColor="@color/selector_smart_reply_chip"
            app:chipCornerRadius="21dp"
            app:chipStrokeColor="@color/app_base_blue"
            app:chipStrokeWidth="1dp" />

        <com.google.android.material.chip.Chip
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="42dp"
            android:textColor="@color/selector_smart_reply_chip_text"
            app:checkedIconVisible="false"
            app:chipBackgroundColor="@color/selector_smart_reply_chip"
            app:chipCornerRadius="21dp"
            app:chipStrokeColor="@color/app_base_blue"
            app:chipStrokeWidth="1dp" />

        <com.google.android.material.chip.Chip
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="42dp"
            android:layout_marginEnd="8dp"
            android:textColor="@color/selector_smart_reply_chip_text"
            app:checkedIconVisible="false"
            app:chipBackgroundColor="@color/selector_smart_reply_chip"
            app:chipCornerRadius="21dp"
            app:chipStrokeColor="@color/app_base_blue"
            app:chipStrokeWidth="1dp" />
    </com.google.android.material.chip.ChipGroup>

</HorizontalScrollView>

I need extra space after last Chip. ChipGroup's padding worked but it does not expected UI result.

Answer 1

Hey I know this is a bit late and I'm glad you've found an answer that works for you. However I think i have a better solution:

• Add 8dp start and end padding to your HorizontalScrollView
• Make clipToPadding false

So this is what your HorizontalScrollView should look like:

    <HorizontalScrollView
        android:id="@+id/chips_container"
        android:layout_width="0dp"
        android:layout_height="56dp"
        android:layout_gravity="center_vertical"
        android:visibility="gone"
        app:layout_constraintBottom_toTopOf="@+id/dividerSmartReplies"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:visibility="visible"

        android:paddingStart="8dp"
        android:paddingEnd="8dp"
        android:clipToPadding="false"
>

And you can remove the margins on both the first and last chip!