Quelle  item_media_gallery.xml

<?xml version="1.0" encoding="utf-8"?>
<ch.threema.app.ui.CheckableFrameLayout 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:id="@+id/content_frame"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="@dimen/media_gallery_grid_item_padding"
    tools:layout_height="150dp"
    tools:layout_width="150dp">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:duplicateParentState="true"
        android:stateListAnimator="@animator/selector_gallery_image">

        <ch.threema.app.ui.SquareImageView
            android:id="@+id/thumbnail_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:duplicateParentState="true"
            android:scaleType="centerCrop"
            tools:background="@tools:sample/avatars" />

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

        <LinearLayout
            android:id="@+id/animated_format_label_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:background="@color/mime_type_marker_background"
            android:gravity="left"
            android:orientation="horizontal"
            android:paddingLeft="2dp"
            android:paddingRight="2dp"
            android:visibility="gone">

            <ImageView
                android:id="@+id/animated_format_label_icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/attach_gif"
                app:srcCompat="@drawable/ic_gif_24dp"
                app:tint="@android:color/white" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/video_marker_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:background="@color/mime_type_marker_background"
            android:gravity="center"
            android:orientation="horizontal"
            android:paddingLeft="4dp"
            android:paddingRight="6dp"
            android:visibility="gone">

            <ImageView
                android:id="@+id/video_icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="4dp"
                android:contentDescription="@string/attach_video"
                app:srcCompat="@drawable/ic_videocam_black_24dp"
                app:tint="@android:color/white" />

            <TextView
                android:id="@+id/video_duration_text"
                style="@style/Threema.TextAppearance.BodySmall"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@android:color/white" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/voicemessage_marker_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:background="@color/mime_type_marker_background"
            android:gravity="center"
            android:orientation="horizontal"
            android:paddingLeft="4dp"
            android:paddingRight="6dp"
            android:visibility="gone">

            <ImageView
                android:id="@+id/voicemessage_icon"
                android:layout_width="24dp"
                android:layout_height="24dp"
                android:layout_marginRight="2dp"
                android:contentDescription="@string/media_gallery_audio"
                android:paddingTop="2dp"
                android:paddingBottom="2dp"
                app:srcCompat="@drawable/ic_keyboard_voice_outline"
                app:tint="@android:color/white" />

            <TextView
                android:id="@+id/voicemessage_duration_text"
                style="@style/Threema.TextAppearance.BodySmall"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@android:color/white" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/filename_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|left"
            android:background="@color/mime_type_marker_background"
            android:duplicateParentState="true"
            android:gravity="left"
            android:orientation="vertical"
            android:paddingLeft="4dp"
            android:paddingTop="4dp"
            android:paddingRight="4dp"
            android:paddingBottom="4dp"
            android:visibility="gone">

            <TextView
                android:id="@+id/text_filename"
                style="@style/Threema.TextAppearance.BodySmall"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="left"
                android:ellipsize="middle"
                android:gravity="left"
                android:maxLines="2"
                android:textColor="@android:color/white" />

        </LinearLayout>

    </FrameLayout>

    <ch.threema.app.ui.CheckableView
        android:id="@+id/check_box"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_gravity="top|left"
        android:layout_margin="6dp"
        android:background="@drawable/selector_grid_checkbox_invisible"
        android:duplicateParentState="true" />

</ch.threema.app.ui.CheckableFrameLayout>