fedilab-Android-App/app/src/main/res/layout/show_attachment.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
    Copyright 2017 Thomas Schneider

    This file is a part of Mastalab

    This program is free software; you can redistribute it and/or modify it under the terms of the
    GNU General Public License as published by the Free Software Foundation; either version 3 of the
    License, or (at your option) any later version.

    Mastalab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
    Public License for more details.

    You should have received a copy of the GNU General Public License along with Mastalab; if not,
    see <http://www.gnu.org/licenses>.
-->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="wrap_content">
    <ImageView
        android:id="@+id/dialog_imageview"
        android:scaleType="fitXY"
        android:visibility="gone"
        android:adjustViewBounds="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:ignore="ContentDescription" />
    <VideoView
        android:visibility="gone"
        android:id="@+id/dialog_videoview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:id="@+id/dialog_webview_container"
        android:layout_width="match_parent"
        android:visibility="gone"
        android:gravity="center"
        android:layout_gravity="center"
        android:layout_height="match_parent">
        <WebView
            android:id="@+id/dialog_webview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>
    <RelativeLayout
        android:id="@+id/loader"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:gravity="center"
        >
        <ProgressBar
            android:layout_marginTop="50dp"
            android:layout_marginBottom="50dp"
            android:layout_width="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            android:layout_height="wrap_content"
            android:indeterminate="true" />
    </RelativeLayout>
</RelativeLayout>