title: android clipChildren not working cornerRadius shape
body: <p>I have a problem to clipping a constraint layout view.</p>
  
  <p>this is my xml layout code</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.constraint.ConstraintLayout
    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="match_parent"
    android:background="@drawable/deck_card_corner_radius"
    android:clipChildren="true"
  &gt;
    &lt;ImageView
      android:id="@+id/imageView4"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toTopOf="parent"
      android:scaleType="centerCrop"
      app:srcCompat="@drawable/splashscreen" /&gt;
  
  &lt;/android.support.constraint.ConstraintLayout&gt;
  </code></pre>
  
  <p>deck_card_corner_radius</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"&gt;
    &lt;gradient android:angle="270" android:endColor="#316db2" android:startColor="#316db2" /&gt;
    &lt;corners android:bottomLeftRadius="30dp" android:bottomRightRadius="30dp" android:topLeftRadius="30dp" android:topRightRadius="30dp"/&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>without image i got this</p>
  
  <p><a href="https://i.stack.imgur.com/Ho85z.png" rel="nofollow noreferrer">no image src</a></p>
  
  <p>with image</p>
  
  <p><a href="https://i.stack.imgur.com/0R572.jpg" rel="nofollow noreferrer">not clipping corner</a></p>
  
  <p>can someone help me?</p>