SchildiChat-android/vector/src/main/res/layout/view_state.xml

<?xml version="1.0" encoding="utf-8"?>
<merge 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="8dp"
    tools:parentTag="android.widget.FrameLayout">

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center" />

    <LinearLayout
        android:id="@+id/errorView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:orientation="vertical"
        android:padding="@dimen/layout_horizontal_margin"
        android:visibility="gone"
        tools:visibility="visible">

        <TextView
            android:id="@+id/errorMessageView"
            style="@style/Widget.Vector.TextView.Subtitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            android:textColor="?vctr_content_primary"
            tools:text="Une erreur est survenue" />

        <Button
            android:id="@+id/errorRetryView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="8dp"
            android:minWidth="190dp"
            android:text="@string/global_retry" />

    </LinearLayout>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/emptyView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:orientation="vertical"
        android:padding="@dimen/layout_horizontal_margin">

        <ImageView
            android:id="@+id/emptyImageView"
            style="@style/VectorEmptyImageView"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_gravity="center_horizontal"
            android:layout_marginStart="20dp"
            android:layout_marginEnd="20dp"
            android:layout_marginBottom="30dp"
            android:importantForAccessibility="no"
            android:maxHeight="350dp"
            app:layout_constraintBottom_toTopOf="@id/emptyTitleView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_chainStyle="packed"
            tools:ignore="MissingPrefix"
            tools:layout_constraintHeight_percent="0.5"
            tools:src="@drawable/ic_search_no_results" />

        <TextView
            android:id="@+id/emptyTitleView"
            style="@style/Widget.Vector.TextView.Subtitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:gravity="center"
            android:textColor="?vctr_content_primary"
            android:textStyle="bold"
            app:layout_constraintBottom_toTopOf="@id/emptyMessageView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/emptyImageView"
            app:layout_constraintVertical_chainStyle="packed"
            tools:text="@string/room_list_people_empty_title" />

        <TextView
            android:id="@+id/emptyMessageView"
            style="@style/Widget.Vector.TextView.Body"
            android:layout_width="220dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:textColor="?vctr_content_secondary"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/emptyTitleView"
            app:layout_constraintVertical_chainStyle="packed"
            tools:text="@string/room_list_people_empty_body" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</merge>