Camera preview is not takin the entire screen about mobilevisionbarcodescanner HOT 4 OPEN

<include layout="@layout/view_toolbar"
    android:id="@+id/layout"
    app:layout_constraintTop_toBottomOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"/>

<com.sothree.slidinguppanel.SlidingUpPanelLayout
    xmlns:sothree="http://schemas.android.com/apk/res-auto"
    android:id="@+id/slidingLayout"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:gravity="top"
    sothree:umanoPanelHeight="0dp"
    sothree:umanoShadowHeight="4dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/verticalGuideline"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/layout">

    <LinearLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    </LinearLayout>

    <TextView
        android:id="@+id/message"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center|top"
        android:text="The Awesome Sliding Up Panel"
        android:textSize="16sp" />

</com.sothree.slidinguppanel.SlidingUpPanelLayout>

<android.support.constraint.Guideline
    android:id="@+id/verticalGuideline"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.5"/>

<LinearLayout
    android:id="@+id/actionContainer"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:orientation="vertical"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@id/verticalGuideline"
    app:layout_constraintTop_toBottomOf="@+id/layout">

</LinearLayout>