问Android CardView移除填充

EN

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/ColorPrimaryDark">

    <android.support.v7.widget.CardView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        card_view:cardCornerRadius="10dp"
        android:layout_marginTop="9dp"
        android:layout_marginLeft="9dp"
        android:layout_marginRight="9dp"
        card_view:cardElevation="0.01dp"
        android:layout_marginBottom="0dp"
        card_view:cardPreventCornerOverlap="true"
        card_view:cardUseCompatPadding="true"
        card_view:cardBackgroundColor="@color/ColorPrimary">

        <RelativeLayout
            android:id="@+id/top_layout"
            android:layout_width="fill_parent"
            android:layout_height="180dp"
            android:background="@color/ColorPrimary">

            <ImageView
                android:id="@+id/img_thumbnail"
                android:layout_width="fill_parent"
                android:layout_height="180dp"
                android:scaleType="fitXY"
                android:background="@drawable/korabltest"/>

            <RelativeLayout
                android:id="@+id/inner_layout"
                android:layout_width="fill_parent"
                android:layout_height="36dp"
                android:background="#5c1b1b1b"
                android:layout_gravity="bottom"
                android:layout_alignParentBottom="true"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true">

                <TextView
                    android:id="@+id/tv_nature"
                    android:layout_width="wrap_content"
                    android:layout_height="50dp"
                    android:paddingLeft="5dp"
                    android:paddingRight="5dp"
                    android:layout_gravity="bottom"
                    android:gravity="center_vertical"
                    android:alpha="0.8"
                    android:textColor="#fff"
                    android:textSize="18sp"
                    android:text="Lexington"
                    android:layout_alignParentLeft="true"
                    android:layout_alignParentStart="true" />

                <TextView
                    android:id="@+id/tv_nature_1"
                    android:layout_width="wrap_content"
                    android:layout_height="50dp"
                    android:paddingLeft="5dp"
                    android:paddingRight="5dp"
                    android:layout_gravity="bottom"
                    android:gravity="center_vertical"
                    android:alpha="0.8"
                    android:textColor="#fff"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:text="527 (31%)"
                    android:layout_alignParentBottom="true"
                    android:layout_alignParentRight="true"
                    android:layout_alignParentEnd="true" />
            </RelativeLayout>
        </RelativeLayout>
    </android.support.v7.widget.CardView>

</LinearLayout>