CameraView/demo/src/main/res/layout/activity_camera.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/root"
    android:background="#FF444444"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Camera -->
    <com.otaliastudios.cameraview.CameraView
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/camera"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:keepScreenOn="true"
        app:cameraGrid="off"
        app:cameraCropOutput="false"
        app:cameraFacing="back"
        app:cameraFlash="off"
        app:cameraAudio="on"
        app:cameraGestureTap="focusWithMarker"
        app:cameraGestureLongTap="none"
        app:cameraGesturePinch="zoom"
        app:cameraGestureScrollHorizontal="exposureCorrection"
        app:cameraGestureScrollVertical="none"
        app:cameraJpegQuality="100"
        app:cameraSessionType="picture" />

    <!-- Controls -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:padding="16dp"
        android:orientation="horizontal"
        android:weightSum="3">

        <ImageButton
            android:id="@+id/edit"
            android:layout_width="56dp"
            android:layout_height="56dp"
            android:background="@drawable/background"
            app:srcCompat="@drawable/ic_edit" />

        <Space
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:layout_weight="1" />

        <ImageButton
            android:id="@+id/capturePhoto"
            android:layout_width="56dp"
            android:layout_height="56dp"
            android:background="@drawable/background"
            app:srcCompat="@drawable/ic_photo" />

        <Space
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:layout_weight="1" />

        <ImageButton
            android:id="@+id/captureVideo"
            android:layout_width="56dp"
            android:layout_height="56dp"
            android:background="@drawable/background"
            app:srcCompat="@drawable/ic_video" />

        <Space
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:layout_weight="1" />

        <ImageButton
            android:id="@+id/toggleCamera"
            android:layout_width="56dp"
            android:layout_height="56dp"
            android:background="@drawable/background"
            app:srcCompat="@drawable/ic_switch" />
    </LinearLayout>

    <!-- Edit -->
    <android.support.v4.widget.NestedScrollView
        android:id="@+id/controls"
        android:background="@android:color/white"
        app:layout_behavior="@string/bottom_sheet_behavior"
        app:behavior_hideable="true"
        app:behavior_peekHeight="300dp"
        app:behavior_skipCollapsed="false"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </android.support.v4.widget.NestedScrollView>

</android.support.design.widget.CoordinatorLayout>