FairEmail/app/src/main/res/layout/dialog_theme.xml

<?xml version="1.0" encoding="utf-8"?>
<eu.faircode.email.ScrollViewEx 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:fadeScrollbars="false"
    android:padding="24dp"
    android:scrollbarStyle="outsideOverlay">

    <eu.faircode.email.ConstraintLayoutEx
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <eu.faircode.email.FixedTextView
            android:id="@+id/tvCaption"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:drawableEnd="@drawable/twotone_palette_24"
            android:drawablePadding="6dp"
            android:text="@string/title_setup_theme"
            android:textAppearance="@style/TextAppearance.AppCompat.Large"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <RadioGroup
            android:id="@+id/rgTheme"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:orientation="vertical"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/tvCaption">

            <RadioButton
                android:id="@+id/rbThemeBlueOrange"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_blue_orange"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeRedGreen"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_red_green"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeYellowPurple"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_yellow_purple"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeGrey"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_grey"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeSolarized"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_solarized"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeBlackOrWhite"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_black_or_white"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeBlackAndWhite"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_black_and_white"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeYou"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_you"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />
        </RadioGroup>

        <eu.faircode.email.FixedTextView
            android:id="@+id/tvYou"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="6dp"
            android:drawableEnd="@drawable/twotone_settings_24"
            android:drawablePadding="6dp"
            android:text="@string/title_setup_theme_you_hint"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textStyle="italic"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/rgTheme" />

        <androidx.appcompat.widget.SwitchCompat
            android:id="@+id/swReverse"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:text="@string/title_setup_theme_reverse"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/tvYou" />

        <RadioGroup
            android:id="@+id/rgThemeOptions"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:orientation="vertical"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/swReverse">

            <RadioButton
                android:id="@+id/rbThemeLight"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_light"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeDark"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_dark"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

            <RadioButton
                android:id="@+id/rbThemeSystem"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:text="@string/title_setup_theme_system"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium" />
        </RadioGroup>

        <eu.faircode.email.FixedTextView
            android:id="@+id/tvSystem"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="6dp"
            android:text="@string/title_setup_theme_system_hint"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textStyle="italic"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/rgThemeOptions" />

        <androidx.appcompat.widget.SwitchCompat
            android:id="@+id/swBlack"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:text="@string/title_setup_theme_black_background"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/tvSystem" />

        <androidx.appcompat.widget.SwitchCompat
            android:id="@+id/swHtmlLight"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:text="@string/title_setup_theme_html_light"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/swBlack" />

        <androidx.appcompat.widget.SwitchCompat
            android:id="@+id/swComposerLight"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:text="@string/title_setup_theme_composer_light"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/swHtmlLight" />

        <Button
            android:id="@+id/btnMore"
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:drawableEnd="@drawable/twotone_monitor_24"
            android:drawablePadding="6dp"
            android:text="@string/title_advanced_more"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/swComposerLight" />

        <eu.faircode.email.FixedTextView
            android:id="@+id/tvMore"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:drawableEnd="@drawable/twotone_open_in_new_12"
            android:drawablePadding="6dp"
            android:drawableTint="?android:attr/textColorLink"
            android:text="@string/title_setup_theme_more_colors"
            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
            android:textColor="?android:attr/textColorLink"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/btnMore" />
    </eu.faircode.email.ConstraintLayoutEx>
</eu.faircode.email.ScrollViewEx>