linphone-android/app/src/main/res/layout/file_viewer_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">

    <data>
        <import type="android.view.View" />
        <variable
            name="backClickListener"
            type="View.OnClickListener" />
        <variable
            name="shareClickListener"
            type="View.OnClickListener" />
        <variable
            name="viewModel"
            type="org.linphone.ui.main.viewer.viewmodel.FileViewModel" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/black">

        <VideoView
            android:id="@+id/video_player"
            android:onClick="@{() -> viewModel.toggleFullScreen()}"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:visibility="@{viewModel.isVideo ? View.VISIBLE : View.GONE}"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

        <ImageView
            android:id="@+id/play_pause_video_playback"
            android:onClick="@{() -> viewModel.playPauseVideo()}"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp"
            android:padding="8dp"
            android:src="@{viewModel.isVideoPlaying ? @drawable/pause_fill : @drawable/play_fill, default=@drawable/play_fill}"
            android:visibility="@{viewModel.isVideo &amp;&amp; !viewModel.fullScreenMode ? View.VISIBLE : View.GONE, default=gone}"
            app:layout_constraintBottom_toTopOf="@id/file_name"
            app:layout_constraintStart_toStartOf="@id/pdf_view_pager"
            app:layout_constraintEnd_toEndOf="@id/pdf_view_pager"
            app:tint="?attr/color_main1_500"/>

        <androidx.viewpager2.widget.ViewPager2
            android:id="@+id/pdf_view_pager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal"
            android:visibility="@{viewModel.isPdf ? View.VISIBLE : View.GONE, default=gone}" />

        <com.tbuonomo.viewpagerdotsindicator.DotsIndicator
            android:id="@+id/dots_indicator"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp"
            android:visibility="@{viewModel.isPdf ? View.VISIBLE : View.GONE, default=gone}"
            app:dotsColor="?attr/color_main2_200"
            app:dotsCornerRadius="8dp"
            app:dotsSize="13dp"
            app:dotsSpacing="5dp"
            app:dotsWidthFactor="2.5"
            app:selectedDotColor="?attr/color_main1_500"
            app:progressMode="false"
            app:layout_constraintBottom_toTopOf="@id/file_name"
            app:layout_constraintStart_toStartOf="@id/pdf_view_pager"
            app:layout_constraintEnd_toEndOf="@id/pdf_view_pager" />

        <com.github.chrisbanes.photoview.PhotoView
            android:id="@+id/image"
            android:onClick="@{() -> viewModel.toggleFullScreen()}"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@drawable/illu"
            android:adjustViewBounds="true"
            android:scaleType="fitCenter"
            coilFile="@{viewModel.path}"
            android:visibility="@{viewModel.isPdf || viewModel.isVideo ? View.GONE : View.VISIBLE}" />

        <ImageView
            android:id="@+id/back"
            android:onClick="@{backClickListener}"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:background="?attr/color_main2_000"
            android:adjustViewBounds="true"
            android:padding="15dp"
            android:src="@drawable/caret_left"
            android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
            app:tint="?attr/color_main1_500"
            app:layout_constraintBottom_toBottomOf="@id/title"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@id/title" />

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/main_page_title_style"
            android:id="@+id/title"
            android:layout_width="0dp"
            android:layout_height="@dimen/top_bar_height"
            android:background="?attr/color_main2_000"
            android:paddingStart="10dp"
            android:paddingEnd="10dp"
            android:text=""
            android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
            app:layout_constraintEnd_toStartOf="@id/share"
            app:layout_constraintStart_toEndOf="@id/back"
            app:layout_constraintTop_toTopOf="parent"/>

        <ImageView
            android:id="@+id/share"
            android:onClick="@{shareClickListener}"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:background="?attr/color_main2_000"
            android:adjustViewBounds="true"
            android:padding="15dp"
            android:src="@drawable/share_network"
            android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
            app:tint="?attr/color_main1_500"
            app:layout_constraintBottom_toBottomOf="@id/title"
            app:layout_constraintEnd_toStartOf="@id/save"
            app:layout_constraintTop_toTopOf="@id/title" />

        <ImageView
            android:id="@+id/save"
            android:onClick="@{() -> viewModel.exportToMediaStore()}"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:background="?attr/color_main2_000"
            android:adjustViewBounds="true"
            android:padding="15dp"
            android:src="@drawable/download_simple"
            android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
            app:tint="?attr/color_main1_500"
            app:layout_constraintBottom_toBottomOf="@id/title"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@id/title" />

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/default_text_style_300"
            android:id="@+id/file_name"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:background="?attr/color_main2_000"
            android:paddingTop="16dp"
            android:paddingBottom="16dp"
            android:text="@{viewModel.fileName, default=`nomdufichier.jpg\nenvoyé le 02/05/2023 à 11h05`}"
            android:textSize="12sp"
            android:textColor="?attr/color_main2_400"
            android:textAlignment="center"
            android:visibility="@{viewModel.fullScreenMode ? View.GONE : View.VISIBLE}"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>