title: Android | CardView stays above TextView
body: <p>I have the following layout:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;FrameLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/create_workout_fab_container"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_margin="@dimen/activity_horizontal_margin"
  android:layout_alignParentBottom="true"
  android:layout_alignParentRight="true"
  android:background="@drawable/fab"
  android:stateListAnimator="@anim/fab_elevation"
  android:clickable="true"
  &gt;
  
  &lt;android.support.v7.widget.CardView
      xmlns:card_view="http://schemas.android.com/apk/res-auto"
      android:id="@+id/create_workout_fab_anim_helper"
      android:layout_width="@dimen/fab_size"
      android:layout_height="@dimen/fab_size"
      card_view:cardBackgroundColor="@color/primary_dark"
      card_view:cardCornerRadius="@dimen/fab_radius"
      android:visibility="invisible"
      /&gt;
  &lt;TextView
      android:id="@+id/create_workout_fab_label"
      android:layout_width="@dimen/fab_size"
      android:layout_height="@dimen/fab_size"
      android:background="@drawable/fab_ripple_selector"
      android:textAppearance="?android:textAppearanceLarge"
      android:text="+"
      android:textColor="@color/fab_label_color"
      android:duplicateParentState="true"
      android:gravity="center"
      tools:text="+"
      tools:textColor="@color/fab_label_color"
      /&gt;
  
  
  
      &lt;/FrameLayout&gt;
  </code></pre>
  
  <p>The CardView is only there to use it for an smooth animation from a cirle button to a rectangle view by animation a radius change.</p>
  
  <p>But the problem is, wheneever the CardView becomes visible it stays above the TextView. Why is that and how do I get it to lay under the TextView</p>