hexapod/software/android/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/grey_200"
    tools:context=".MainActivity">

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

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/white"
            android:elevation="8dp"
            android:forceDarkAllowed="false"
            android:gravity="center_horizontal"
            android:orientation="vertical"
            android:paddingStart="16dp"
            android:paddingEnd="16dp">

            <ImageView
                android:id="@+id/hexapod_logo"
                android:layout_width="120dp"
                android:layout_height="120dp"
                android:layout_marginTop="32dp"
                android:layout_marginBottom="32dp"
                android:src="@drawable/hexapod_logo"
                app:layout_constraintBottom_toTopOf="@id/tab"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />


            <com.google.android.material.tabs.TabLayout
                android:id="@+id/tab"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toTopOf="@id/ip_input_layout"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/hexapod_logo">

                <com.google.android.material.tabs.TabItem
                    android:id="@+id/wifi_tab"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="@color/white"
                    android:forceDarkAllowed="false"
                    android:text="WiFi" />

                <com.google.android.material.tabs.TabItem
                    android:id="@+id/bluetooth_tab"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="@color/white"
                    android:forceDarkAllowed="false"
                    android:text="Bluetooth" />

            </com.google.android.material.tabs.TabLayout>

        </LinearLayout>

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

            <com.google.android.material.card.MaterialCardView
                android:id="@+id/card"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="16dp"
                app:cardElevation="8dp">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/grey_500"
                    android:forceDarkAllowed="false"
                    android:orientation="vertical">

                    <com.google.android.material.textfield.TextInputLayout
                        android:id="@+id/ip_input_layout"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="4dp"
                        android:background="@color/grey_500"
                        android:paddingStart="16dp"
                        android:paddingTop="16dp"
                        android:paddingEnd="16dp"
                        android:visibility="visible"
                        app:errorEnabled="true"
                        app:layout_constraintBottom_toTopOf="@id/port_input_layout"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@+id/tab">

                        <com.google.android.material.textfield.TextInputEditText
                            android:id="@+id/ip_input"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:background="@color/grey_500"
                            android:digits="0123456789."
                            android:forceDarkAllowed="false"
                            android:hint="IP"
                            android:inputType="number|numberDecimal"
                            android:text="192.168.1.127"
                            android:textColor="@android:color/primary_text_light" />
                    </com.google.android.material.textfield.TextInputLayout>

                    <com.google.android.material.textfield.TextInputLayout
                        android:id="@+id/port_input_layout"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="4dp"
                        android:background="@color/grey_500"
                        android:paddingStart="16dp"
                        android:paddingEnd="16dp"
                        android:visibility="visible"
                        app:errorEnabled="true"
                        app:layout_constraintBottom_toTopOf="@id/paired_devices"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@id/ip_input_layout">

                        <com.google.android.material.textfield.TextInputEditText
                            android:id="@+id/port_input"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:background="@color/grey_500"
                            android:forceDarkAllowed="false"
                            android:hint="Port"
                            android:inputType="number"
                            android:text="1234"
                            android:textColor="@android:color/primary_text_light" />

                    </com.google.android.material.textfield.TextInputLayout>

                    <include
                        android:id="@+id/selected"
                        layout="@layout/selected_device"
                        android:visibility="visible"
                        app:layout_constraintBottom_toTopOf="@+id/button_connect"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toBottomOf="@+id/port_input_layout" />

                </LinearLayout>

            </com.google.android.material.card.MaterialCardView>

            <Button
                android:id="@+id/button_connect"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:layout_marginEnd="16dp"
                android:paddingTop="16dp"
                android:paddingBottom="16dp"
                android:text="Connect"
                android:stateListAnimator="@null"
                android:elevation="8dp"
                app:layout_constraintBottom_toTopOf="@+id/textView_github"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/selected" />

            <TextView
                android:id="@+id/textView_github"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="32dp"
                android:layout_marginBottom="32dp"
                android:text="@string/hexapod_github"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/button_connect" />

        </LinearLayout>
    </LinearLayout>
</ScrollView>