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

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

    <data>
        <import type="android.view.View"/>
        <variable
            name="createAccountClickListener"
            type="android.view.View.OnClickListener"/>
        <variable
            name="accountLoginClickListener"
            type="android.view.View.OnClickListener"/>
        <variable
            name="genericAccountLoginClickListener"
            type="android.view.View.OnClickListener"/>
        <variable
            name="remoteProvisioningClickListener"
            type="android.view.View.OnClickListener"/>
        <variable
            name="viewModel"
            type="org.linphone.activities.assistant.viewmodels.WelcomeViewModel" />
    </data>

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

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/top_bar_fragment"
            android:name="org.linphone.activities.assistant.fragments.TopBarFragment"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            tools:layout="@layout/assistant_top_bar_fragment" />

        <androidx.core.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@id/top_bar_fragment">

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

                <TextView
                    style="@style/standard_text_font"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:text="@string/assistant_welcome_title"
                    android:paddingTop="10dp"
                    android:textAllCaps="true" />

                <TextView
                    style="@style/standard_small_text_font"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:layout_gravity="top"
                    android:paddingTop="10dp"
                    android:text="@string/assistant_welcome_desc" />

                <GridLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:columnCount="1">

                    <TextView
                        android:id="@+id/account_creation"
                        android:visibility="@{viewModel.showCreateAccount ? View.VISIBLE : View.GONE}"
                        android:onClick="@{createAccountClickListener}"
                        style="@style/button_font"
                        android:gravity="center"
                        android:padding="10dp"
                        android:layout_margin="20dp"
                        android:layout_width="wrap_content"
                        android:layout_gravity="fill"
                        android:layout_columnWeight="1"
                        android:layout_height="wrap_content"
                        android:background="@drawable/assistant_button"
                        android:textColor="@drawable/assistant_button_text_color"
                        android:text="@string/assistant_create_account" />

                    <TextView
                        android:id="@+id/account_connection"
                        android:visibility="@{viewModel.showLinphoneLogin ? View.VISIBLE : View.GONE}"
                        android:onClick="@{accountLoginClickListener}"
                        style="@style/button_font"
                        android:gravity="center"
                        android:padding="10dp"
                        android:layout_margin="20dp"
                        android:layout_width="wrap_content"
                        android:layout_gravity="fill"
                        android:layout_columnWeight="1"
                        android:layout_height="wrap_content"
                        android:background="@drawable/assistant_button"
                        android:textColor="@drawable/assistant_button_text_color"
                        android:text="@string/assistant_login_linphone" />

                    <TextView
                        android:id="@+id/generic_connection"
                        android:visibility="@{viewModel.showGenericLogin ? View.VISIBLE : View.GONE}"
                        android:onClick="@{genericAccountLoginClickListener}"
                        style="@style/button_font"
                        android:gravity="center"
                        android:padding="10dp"
                        android:layout_margin="20dp"
                        android:layout_width="wrap_content"
                        android:layout_gravity="fill"
                        android:layout_columnWeight="1"
                        android:layout_height="wrap_content"
                        android:background="@drawable/assistant_button"
                        android:textColor="@drawable/assistant_button_text_color"
                        android:text="@string/assistant_login_generic" />

                    <TextView
                        android:id="@+id/remote_configuration"
                        android:visibility="@{viewModel.showRemoteProvisioning ? View.VISIBLE : View.GONE}"
                        android:onClick="@{remoteProvisioningClickListener}"
                        style="@style/button_font"
                        android:gravity="center"
                        android:padding="10dp"
                        android:layout_margin="20dp"
                        android:layout_width="wrap_content"
                        android:layout_gravity="fill"
                        android:layout_columnWeight="1"
                        android:layout_height="wrap_content"
                        android:background="@drawable/assistant_button"
                        android:textColor="@drawable/assistant_button_text_color"
                        android:text="@string/assistant_remote_provisioning" />

                </GridLayout>

            </LinearLayout>

        </androidx.core.widget.NestedScrollView>

    </RelativeLayout>

</layout>