Как удалить границу кармана по умолчанию из layout.xml

Question

Я не могу удалить границу по умолчанию для CardView. Кто-нибудь сталкивался с этой проблемой раньше?

Две линии границы накладываются друг на друга

CardviewDesign.xml

<android.support.v7.widget.CardView 
    xmlns:android="https://schemas.android.com/apk/res/android" 
    xmlns:android2="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:card_view="https://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/card_view" 
    android:layout_width="match_parent" 

    android2:layout_marginTop="5dp" 
    android2:layout_marginLeft="5dp" 
    android2:layout_marginRight="5dp" 
    android2:layout_gravity="center|top" 

    card_view:cardCornerRadius="20dp" 
    android2:layout_width="match_parent" 
    android2:layout_height="wrap_content"> 

<FrameLayout 
    android2:layout_width="match_parent" 
    android2:layout_height="400dp" 

    android2:background="@drawable/cardviewstring"> 



    <LinearLayout 
     android2:orientation="vertical" 
     android2:layout_width="380dp" 
     android2:layout_height="match_parent" 


     android2:weightSum="1" 
     android2:layout_marginRight="20dp"> 

     <LinearLayout 
      android2:orientation="vertical" 
      android2:layout_width="match_parent" 
      android2:layout_weight="1" 
      android2:layout_height="250dp"> 

      <ImageView 
       android2:layout_width="match_parent" 
       android2:layout_height="match_parent" 
       app:srcCompat="@mipmap/ic_launcher" 
       android2:id="@+id/imageView4" /> 

     </LinearLayout> 

     <LinearLayout 
      android2:orientation="vertical" 
      android2:layout_width="match_parent" 
      android2:layout_height="wrap_content" 
      android2:paddingTop="25dp"> 

      <ScrollView 
       android2:layout_width="match_parent" 
       android2:layout_height="84dp" 
       android2:background="@drawable/screen_background_dark_transparent" 
       android2:layout_marginLeft="3dp"> 

       <LinearLayout 
        android2:layout_width="match_parent" 
        android2:layout_height="wrap_content" 
        android2:orientation="vertical" > 

        <TextView 
         android2:text="TextView" 
         android2:layout_width="match_parent" 
         android2:layout_height="wrap_content" 
         android2:id="@+id/textView4" /> 

        <TextView 
         android2:text="TextView" 
         android2:layout_width="match_parent" 
         android2:layout_height="35dp" 
         android2:id="@+id/textView3" /> 
       </LinearLayout> 
      </ScrollView> 

     </LinearLayout> 

     <LinearLayout 
      android2:orientation="vertical" 
      android2:layout_marginTop="10dp" 
      android2:layout_width="match_parent" 
      android2:layout_height="42dp" 
      android:layout_alignParentBottom="true"> 

      <LinearLayout 
       android2:orientation="horizontal" 
       android2:layout_width="match_parent" 
       android2:layout_height="match_parent"> 

       <ImageView 
        android2:layout_width="wrap_content" 
        android2:layout_height="wrap_content" 
        app:srcCompat="@drawable/ic_share" 
        android2:id="@+id/imageView3" 
        android2:layout_weight="1" /> 

       <ImageView 
        android2:layout_width="wrap_content" 
        android2:layout_height="wrap_content" 
        app:srcCompat="@drawable/ic_like" 
        android2:id="@+id/imageView2" 
        android2:layout_weight="1" /> 
      </LinearLayout> 
     </LinearLayout> 
    </LinearLayout> 

</FrameLayout> 

вытяжке/cardviewstring.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > 
    <solid android:color="#ffffffff" /> 
    <stroke android:width="3dip" android:color="#000000"/> 
    <corners android:radius="20dip"/> 
</shape> 

color.xml

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
    <color name="colorPrimary">#154360</color> 
    <color name="colorPrimaryDark">#154360</color> 
    <color name="colorAccent">#ffffff</color> 
    <color name="colorButton">#A0FFFFFF</color> 
    <color name="colorView">#A0FF4081</color> 
    <color name="white">#ffff</color> 
    <color name="lightblue">#ADD8E6</color> 
    <color name="tabsScrollColor">#ADD8E6</color> 
    <color name="gray">#C0C0C0</color> 
    <color name="black">#000000</color> 

    <color name="ccolorPrimary">#3F51B5</color> 
    <color name="ccolorPrimaryDark">#303F9F</color> 
    <color name="ccolorAccent">#FF4081</color> 
    <color name="year">#999999</color> 
    <color name="title">#222222</color> 

    <drawable name="screen_background_dark_transparent">#80000000</drawable> 

</resources> 

Answer 1

Попробуйте добавить это к вашему cardView

card_view:cardPreventCornerOverlap="false" 

Answer 2

Набор app:cardElevation="0dp" для CardView виджета.

Answer 3

card_view:cardPreventCornerOverlap="false" 

или с использованием Java:

cardView.setPreventCornerOverlap(false) 

Вы можете прочитать все об этом here.