title: Rounded corners cardView don't work in RecyclerView - Android?
body: <p>My android device is <code>4.3</code> and don't work round corner of <code>cardView</code> :</p>
  
  
  
  <p></p>
  
  <pre><code>&lt;android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/tools"
      xmlns:card_view="http://schemas.android.com/apk/res-auto"
      android:id="@+id/CardStart"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_marginBottom="5dp"
      android:layout_marginLeft="20dp"
      android:layout_marginRight="20dp"
      android:scaleType="centerCrop"
      app:cardUseCompatPadding="true"
      card_view:cardBackgroundColor="@color/BlackTrans"
      card_view:cardCornerRadius="5dp"
      card_view:cardElevation="0dp"&gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="horizontal"&gt;
  
          &lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="vertical"&gt;
  
              &lt;TextView
                  android:id="@+id/txtTitle"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
  
              &lt;TextView
                  android:id="@+id/txtDescription"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
          &lt;/LinearLayout&gt;
  
          &lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="vertical"&gt;
  
              &lt;ImageButton
                  android:id="@+id/imgbIcon"
                  android:layout_width="wrap_content"
                  android:layout_height="match_parent"
                  android:src="@drawable/ic_serch" /&gt;
          &lt;/LinearLayout&gt;
      &lt;/LinearLayout&gt;
  &lt;/android.support.v7.widget.CardView&gt;
  </code></pre>
  
  <p></p>
  
  <p>And I write bellow code in my class but don't work yet :</p>
  
  <pre><code>if (android.os.Build.VERSION.SDK_INT &lt; Build.VERSION_CODES.LOLLIPOP)
  {
      holder.CardStart.setCardElevation(0);
      holder.CardStart.setBackgroundColor(ContextCompat.getColor(context,R.color.BlackTrans));
      holder.CardStart.setRadius(5);
      holder.CardStart.setUseCompatPadding(true);
  }
  </code></pre>