wireguard-android/app/src/main/res/layout/config_editor_fragment.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"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <import type="com.wireguard.android.util.ClipboardUtils" />

        <import type="com.wireguard.android.widget.KeyInputFilter" />

        <import type="com.wireguard.android.widget.NameInputFilter" />

        <import type="com.wireguard.config.Peer" />

        <variable
            name="config"
            type="com.wireguard.config.Config" />

        <variable
            name="name"
            type="android.databinding.ObservableField&lt;String&gt;" />
    </data>

    <com.commonsware.cwac.crossport.design.widget.CoordinatorLayout
        android:id="@+id/main_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?android:attr/colorBackground">

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="4dp"
                    android:layout_marginEnd="8dp"
                    android:layout_marginStart="8dp"
                    android:layout_marginTop="8dp"
                    android:background="?android:attr/colorBackground"
                    android:elevation="2dp"
                    android:padding="8dp">

                    <TextView
                        android:id="@+id/interface_title"
                        style="?android:attr/textAppearanceMedium"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_alignParentTop="true"
                        android:text="@string/iface" />

                    <TextView
                        android:id="@+id/interface_name_label"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/interface_title"
                        android:layout_marginTop="8dp"
                        android:labelFor="@+id/interface_name_text"
                        android:text="@string/name" />

                    <EditText
                        android:id="@+id/interface_name_text"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/interface_name_label"
                        android:inputType="textNoSuggestions"
                        android:text="@={name}"
                        app:filter="@{NameInputFilter.newInstance()}" />

                    <TextView
                        android:id="@+id/private_key_label"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/interface_name_text"
                        android:labelFor="@+id/private_key_text"
                        android:text="@string/private_key" />

                    <EditText
                        android:id="@+id/private_key_text"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentStart="true"
                        android:layout_below="@+id/private_key_label"
                        android:layout_toStartOf="@+id/generate_private_key_button"
                        android:contentDescription="@string/public_key_description"
                        android:inputType="textVisiblePassword"
                        android:text="@={config.interface.privateKey}"
                        app:filter="@{KeyInputFilter.newInstance()}" />

                    <Button
                        android:id="@+id/generate_private_key_button"
                        android:layout_width="96dp"
                        android:layout_height="wrap_content"
                        android:layout_alignBottom="@id/private_key_text"
                        android:layout_alignParentEnd="true"
                        android:layout_below="@+id/private_key_label"
                        android:onClick="@{() -> config.interface.generateKeypair()}"
                        android:text="@string/generate" />

                    <TextView
                        android:id="@+id/public_key_label"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/private_key_text"
                        android:labelFor="@+id/public_key_text"
                        android:text="@string/public_key" />

                    <TextView
                        android:id="@+id/public_key_text"
                        style="?android:attr/editTextStyle"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/public_key_label"
                        android:ellipsize="end"
                        android:focusable="false"
                        android:hint="@string/hint_generated"
                        android:maxLines="1"
                        android:onClick="@{ClipboardUtils::copyTextView}"
                        android:text="@{config.interface.publicKey}" />

                    <TextView
                        android:id="@+id/addresses_label"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentStart="true"
                        android:layout_below="@+id/public_key_text"
                        android:layout_toStartOf="@+id/listen_port_label"
                        android:labelFor="@+id/addresses_text"
                        android:text="@string/addresses" />

                    <EditText
                        android:id="@+id/addresses_text"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentStart="true"
                        android:layout_below="@+id/addresses_label"
                        android:layout_toStartOf="@+id/listen_port_text"
                        android:inputType="textNoSuggestions"
                        android:text="@={config.interface.address}" />

                    <TextView
                        android:id="@+id/listen_port_label"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignBaseline="@+id/addresses_label"
                        android:layout_alignParentEnd="true"
                        android:layout_alignStart="@+id/generate_private_key_button"
                        android:labelFor="@+id/listen_port_text"
                        android:text="@string/listen_port" />

                    <EditText
                        android:id="@+id/listen_port_text"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignBaseline="@+id/addresses_text"
                        android:layout_alignParentEnd="true"
                        android:layout_alignStart="@+id/generate_private_key_button"
                        android:hint="@string/hint_random"
                        android:inputType="number"
                        android:text="@={config.interface.listenPort}"
                        android:textAlignment="center" />

                    <TextView
                        android:id="@+id/dns_servers_label"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentStart="true"
                        android:layout_below="@+id/addresses_text"
                        android:layout_toStartOf="@+id/mtu_label"
                        android:labelFor="@+id/dns_servers_text"
                        android:text="@string/dns_servers" />

                    <EditText
                        android:id="@+id/dns_servers_text"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentStart="true"
                        android:layout_below="@+id/dns_servers_label"
                        android:layout_toStartOf="@+id/mtu_text"
                        android:inputType="textNoSuggestions"
                        android:text="@={config.interface.dns}" />

                    <TextView
                        android:id="@+id/mtu_label"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignBaseline="@+id/dns_servers_label"
                        android:layout_alignParentEnd="true"
                        android:layout_alignStart="@+id/generate_private_key_button"
                        android:labelFor="@+id/mtu_text"
                        android:text="@string/mtu" />

                    <EditText
                        android:id="@+id/mtu_text"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignBaseline="@+id/dns_servers_text"
                        android:layout_alignParentEnd="true"
                        android:layout_alignStart="@+id/generate_private_key_button"
                        android:hint="@string/hint_automatic"
                        android:inputType="number"
                        android:text="@={config.interface.mtu}"
                        android:textAlignment="center" />
                </RelativeLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:divider="@null"
                    android:orientation="vertical"
                    app:items="@{config.peers}"
                    app:layout="@{@layout/config_editor_peer}"
                    tools:ignore="UselessLeaf" />

                <Button
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="4dp"
                    android:layout_marginEnd="4dp"
                    android:layout_marginStart="4dp"
                    android:onClick="@{() -> config.peers.add(Peer.newInstance())}"
                    android:text="@string/add_peer" />
            </LinearLayout>
        </ScrollView>
    </com.commonsware.cwac.crossport.design.widget.CoordinatorLayout>
</layout>