tachiyomi/app/src/main/res/layout/download_custom_amount.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="wrap_content"
    android:gravity="center"
    android:orientation="horizontal"
    android:paddingVertical="8dp">

    <androidx.appcompat.widget.AppCompatImageButton
        android:id="@+id/btn_decrease_10"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@drawable/list_item_selector"
        android:padding="8dp"
        android:tint="?attr/colorAccent"
        app:srcCompat="@drawable/ic_chevron_left_double_black_24dp" />

    <androidx.appcompat.widget.AppCompatImageButton
        android:id="@+id/btn_decrease"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@drawable/list_item_selector"
        android:padding="8dp"
        android:tint="?attr/colorAccent"
        app:srcCompat="@drawable/ic_chevron_left_black_24dp" />

    <com.google.android.material.textfield.TextInputEditText
        android:id="@+id/myNumber"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:digits="0123456789"
        android:inputType="number"
        android:padding="8dp"
        android:textStyle="bold" />

    <androidx.appcompat.widget.AppCompatImageButton
        android:id="@+id/btn_increase"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@drawable/list_item_selector"
        android:padding="8dp"
        android:tint="?attr/colorAccent"
        app:srcCompat="@drawable/ic_chevron_right_black_24dp" />

    <androidx.appcompat.widget.AppCompatImageButton
        android:id="@+id/btn_increase_10"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@drawable/list_item_selector"
        android:padding="8dp"
        android:tint="?attr/colorAccent"
        app:srcCompat="@drawable/ic_chevron_right_double_black_24dp" />

</LinearLayout>