linphone-android/app/src/main/res/layout/settings_tunnel.xml

<?xml version="1.0" encoding="utf-8"?>
<layout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <import type="android.view.View" />
        <variable
            name="viewModel"
            type="org.linphone.ui.main.settings.viewmodel.SettingsViewModel" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="20dp"
        android:background="@drawable/shape_squircle_white_background">

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/header_style"
            android:id="@+id/tunnel_host_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="20dp"
            android:text="@string/settings_tunnel_main_host_label"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>

        <androidx.appcompat.widget.AppCompatEditText
            style="@style/default_text_style"
            android:id="@+id/tunnel_host"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_marginEnd="16dp"
            android:layout_marginTop="8dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:text="@={viewModel.tunnelMainHost}"
            android:textSize="14sp"
            android:textColor="@color/gray_main2_600"
            android:maxLines="1"
            android:background="@drawable/edit_text_background"
            android:inputType="text|textUri"
            android:hint="@string/settings_tunnel_main_host_label"
            app:layout_constraintHorizontal_bias="0"
            app:layout_constraintWidth_max="@dimen/text_input_max_width"
            app:layout_constraintTop_toBottomOf="@id/tunnel_host_label"
            app:layout_constraintStart_toStartOf="@id/tunnel_host_label"
            app:layout_constraintEnd_toEndOf="parent"/>

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/header_style"
            android:id="@+id/tunnel_port_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:text="@string/settings_tunnel_main_port_label"
            app:layout_constraintTop_toBottomOf="@id/tunnel_host"
            app:layout_constraintStart_toStartOf="parent"/>

        <androidx.appcompat.widget.AppCompatEditText
            style="@style/default_text_style"
            android:id="@+id/tunnel_port"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_marginEnd="16dp"
            android:layout_marginTop="8dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:text="@={viewModel.tunnelMainPort}"
            android:textSize="14sp"
            android:textColor="@color/gray_main2_600"
            android:maxLines="1"
            android:background="@drawable/edit_text_background"
            android:inputType="number|numberSigned"
            android:hint="@string/settings_tunnel_main_port_label"
            app:layout_constraintHorizontal_bias="0"
            app:layout_constraintWidth_max="@dimen/text_input_max_width"
            app:layout_constraintTop_toBottomOf="@id/tunnel_port_label"
            app:layout_constraintStart_toStartOf="@id/tunnel_port_label"
            app:layout_constraintEnd_toEndOf="parent"/>

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/settings_title_style"
            android:onClick="@{() -> viewModel.toggleTunnelDualMode()}"
            android:id="@+id/tunnel_dual_mode_label"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="10dp"
            android:text="@string/settings_tunnel_dual_mode_label"
            android:maxLines="2"
            android:ellipsize="end"
            app:layout_constraintTop_toTopOf="@id/tunnel_dual_mode_switch"
            app:layout_constraintBottom_toBottomOf="@id/tunnel_dual_mode_switch"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toStartOf="@id/tunnel_dual_mode_switch"/>

        <com.google.android.material.materialswitch.MaterialSwitch
            style="@style/material_switch_style"
            android:id="@+id/tunnel_dual_mode_switch"
            android:onClick="@{() -> viewModel.toggleTunnelDualMode()}"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginEnd="16dp"
            android:checked="@{viewModel.tunnelDualMode}"
            app:layout_constraintTop_toBottomOf="@id/tunnel_port"
            app:layout_constraintEnd_toEndOf="parent" />

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/header_style"
            android:id="@+id/tunnel_dual_host_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:text="@string/settings_tunnel_second_host_label"
            android:visibility="@{viewModel.tunnelDualMode ? View.VISIBLE : View.GONE, default=gone}"
            app:layout_constraintTop_toBottomOf="@id/tunnel_dual_mode_switch"
            app:layout_constraintStart_toStartOf="parent"/>

        <androidx.appcompat.widget.AppCompatEditText
            style="@style/default_text_style"
            android:id="@+id/tunnel_dual_host"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_marginEnd="16dp"
            android:layout_marginTop="8dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:text="@={viewModel.tunnelDualHost}"
            android:textSize="14sp"
            android:textColor="@color/gray_main2_600"
            android:maxLines="1"
            android:background="@drawable/edit_text_background"
            android:inputType="text|textUri"
            android:hint="@string/settings_tunnel_second_host_label"
            android:visibility="@{viewModel.tunnelDualMode ? View.VISIBLE : View.GONE, default=gone}"
            app:layout_constraintHorizontal_bias="0"
            app:layout_constraintWidth_max="@dimen/text_input_max_width"
            app:layout_constraintTop_toBottomOf="@id/tunnel_dual_host_label"
            app:layout_constraintStart_toStartOf="@id/tunnel_dual_host_label"
            app:layout_constraintEnd_toEndOf="parent"/>

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/header_style"
            android:id="@+id/tunnel_dual_port_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:text="@string/settings_tunnel_second_port_label"
            android:visibility="@{viewModel.tunnelDualMode ? View.VISIBLE : View.GONE, default=gone}"
            app:layout_constraintTop_toBottomOf="@id/tunnel_dual_host"
            app:layout_constraintStart_toStartOf="parent"/>

        <androidx.appcompat.widget.AppCompatEditText
            style="@style/default_text_style"
            android:id="@+id/tunnel_dual_port"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_marginEnd="16dp"
            android:layout_marginTop="8dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:text="@={viewModel.tunnelDualPort}"
            android:textSize="14sp"
            android:textColor="@color/gray_main2_600"
            android:maxLines="1"
            android:background="@drawable/edit_text_background"
            android:inputType="number|numberSigned"
            android:hint="@string/settings_tunnel_second_port_label"
            android:visibility="@{viewModel.tunnelDualMode ? View.VISIBLE : View.GONE, default=gone}"
            app:layout_constraintHorizontal_bias="0"
            app:layout_constraintWidth_max="@dimen/text_input_max_width"
            app:layout_constraintTop_toBottomOf="@id/tunnel_dual_port_label"
            app:layout_constraintStart_toStartOf="@id/tunnel_dual_port_label"
            app:layout_constraintEnd_toEndOf="parent"/>

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/header_style"
            android:id="@+id/tunnel_mode_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:text="@string/settings_tunnel_mode_label"
            app:layout_constraintTop_toBottomOf="@id/tunnel_dual_port"
            app:layout_constraintStart_toStartOf="parent"/>

        <androidx.appcompat.widget.AppCompatSpinner
            style="@style/default_text_style"
            android:id="@+id/tunnel_mode_spinner"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_marginEnd="16dp"
            android:layout_marginTop="8dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:textSize="14sp"
            android:textColor="@color/gray_main2_600"
            android:gravity="center_vertical"
            android:overlapAnchor="false"
            android:dropDownVerticalOffset="2dp"
            android:spinnerMode="dropdown"
            android:popupBackground="@drawable/shape_squircle_white_background"
            android:background="@drawable/edit_text_background"
            app:layout_constraintHorizontal_bias="0"
            app:layout_constraintWidth_max="@dimen/text_input_max_width"
            app:layout_constraintTop_toBottomOf="@id/tunnel_mode_label"
            app:layout_constraintStart_toStartOf="@id/tunnel_mode_label"
            app:layout_constraintEnd_toEndOf="parent" />

        <ImageView
            android:id="@+id/tunnel_mode_caret"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="16dp"
            android:src="@drawable/caret_down"
            android:contentDescription="@null"
            app:tint="?attr/color_main2_600"
            app:layout_constraintTop_toTopOf="@id/tunnel_mode_spinner"
            app:layout_constraintBottom_toBottomOf="@id/tunnel_mode_spinner"
            app:layout_constraintEnd_toEndOf="@id/tunnel_mode_spinner"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

</layout>