Quelle  fragment_big_media.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/parent_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:id="@+id/cardview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/preview_image"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:adjustViewBounds="true"
            android:scaleType="center"
            android:visibility="invisible" />

        <com.google.android.material.progressindicator.CircularProgressIndicator
            android:id="@+id/progress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:indeterminate="true"
            android:visibility="gone" />

        <ch.threema.app.camera.VideoEditView
            android:id="@+id/video_edit_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:visibility="invisible" />

    </FrameLayout>

    <ch.threema.app.ui.BigFileView
        android:id="@+id/big_file_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:visibility="invisible" />


</androidx.constraintlayout.widget.ConstraintLayout>