<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/lnrMstr"
android:orientation="vertical"
android:background="#0D000000">

    <android.support.v7.widget.CardView
        android:id="@+id/card_view_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardCornerRadius="@dimen/_5sdp"
        app:cardElevation="@dimen/_5sdp"
        app:cardUseCompatPadding="true"
        android:layout_margin="@dimen/_2sdp"
        android:layout_gravity="center_horizontal">
 </android.support.v7.widget.CardView>

</LinearLayout>