In My Understanding QuickBlox is handling room based Video chatting based on WebRTC protocol. They are managing a room ID and anyone got the room id can join the video. We can create one to one session with our own idea.
In the case of the layout, we can modify the layout in our own way. Please check my layout implementation and its working fine for me.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<RelativeLayout
android:id="@+id/rl_video_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv_hang_up_icon"
android:layout_width="@dimen/app_video_screen_icon_width_height"
android:layout_height="@dimen/app_video_screen_icon_width_height"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="@dimen/activity_horizontal_margin"
android:layout_marginTop="@dimen/activity_horizontal_margin"
android:background="@mipmap/hung_up" />
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
android:layout_gravity="top">
<android.support.v4.view.PagerTitleStrip
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="@color/app_text_icon_color" />
</android.support.v4.view.ViewPager>
<RelativeLayout
android:id="@+id/preview"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="@dimen/app_common_five_dp_padding" />
</RelativeLayout>
<RelativeLayout
android:id="@+id/rl_patient_info_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/transparent"
android:gravity="bottom">
<LinearLayout
android:id="@+id/ll_patient_details_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/app_common_five_dp_padding"
android:orientation="vertical">
<com.adoctortalk.android.utilities.CustomTxtViewBold
android:id="@+id/tv_patient_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/app_common_five_dp_padding"
android:layout_marginLeft="@dimen/app_common_ten_dp_padding"
android:layout_marginTop="@dimen/app_common_five_dp_padding"
android:text="New Text"
android:textColor="@color/app_text_icon_color"
android:textSize="@dimen/application_font_size_very_large" />
<com.adoctortalk.android.utilities.CustomTxtViewBold
android:id="@+id/tv_patient_sub_info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/app_common_five_dp_padding"
android:layout_marginLeft="@dimen/app_common_ten_dp_padding"
android:layout_marginTop="@dimen/app_common_five_dp_padding"
android:text="New Text"
android:textColor="@color/app_text_icon_color"
android:textSize="@dimen/application_font_size_large" />
<LinearLayout
android:id="@+id/ll_patient_action_cotainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="@dimen/app_common_five_dp_padding"
android:layout_margin="@dimen/app_common_five_dp_padding"
android:orientation="horizontal"
android:visibility="visible">
<ImageView
android:id="@+id/iv_profile_icon"
android:layout_width="@dimen/app_video_screen_icon_width_height"
android:layout_height="@dimen/app_video_screen_icon_width_height"
android:layout_marginRight="@dimen/app_common_five_dp_padding"
android:background="@mipmap/profile" />
<ImageView
android:id="@+id/iv_medical_notes_icon"
android:layout_width="@dimen/app_video_screen_icon_width_height"
android:layout_height="@dimen/app_video_screen_icon_width_height"
android:layout_marginLeft="@dimen/app_common_five_dp_padding"
android:layout_marginRight="@dimen/app_common_five_dp_padding"
android:background="@mipmap/medical_notes" />
<ImageView
android:id="@+id/iv_prescription_icon"
android:layout_width="@dimen/app_video_screen_icon_width_height"
android:layout_height="@dimen/app_video_screen_icon_width_height"
android:layout_marginLeft="@dimen/app_common_five_dp_padding"
android:layout_marginRight="@dimen/app_common_five_dp_padding"
android:background="@mipmap/prescription" />
<ImageView
android:id="@+id/iv_attachment_icon"
android:layout_width="@dimen/app_video_screen_icon_width_height"
android:layout_height="@dimen/app_video_screen_icon_width_height"
android:layout_marginLeft="@dimen/app_common_five_dp_padding"
android:layout_marginRight="@dimen/app_common_five_dp_padding"
android:background="@mipmap/attachments" />
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:id="@+id/rl_video_fragmnet_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/ll_patient_details_container"
android:visibility="gone"></RelativeLayout>
</RelativeLayout>
</RelativeLayout>