sheishuoAPP/app/res/layout/avchat_surface_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/large_size_preview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center"
        android:orientation="horizontal" />

    <TextView
        android:id="@+id/notificationLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:gravity="center"
        android:shadowColor="@color/video_call_peer_close_cameral_text_shadow"
        android:shadowDy="1"
        android:shadowRadius="1"
        android:textColor="@color/video_call_peer_close_cameral_text_color"
        android:textSize="16sp"
        android:background="@drawable/avchat_call_bg" />

    <FrameLayout
        android:id="@+id/small_size_preview_layout"
        android:layout_width="64dp"
        android:layout_height="98dp"
        android:layout_gravity="right|top"
        android:layout_marginRight="16dp"
        android:layout_marginTop="18dp">

        <LinearLayout
            android:id="@+id/small_size_preview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/transparent"
            android:orientation="vertical"
            android:visibility="gone" />

        <ImageView
            android:id="@+id/smallSizePreviewCoverImg"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="fitXY"
            android:src="@drawable/avchat_close_video_send"
            android:visibility="gone" />
    </FrameLayout>

</FrameLayout>