title: Align FrameLayout inside ConstraintLayout to bottom
body: <p>I want a layout above recycler view at the bottom of the screen,(like a frame) so that even when that layout is visible I can still scroll recycler view behind it. So I want to align the frame layout at the bottom of the screen and make it visible and invisible as per requirement. Here is my 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"
      tools:context="com.protossoft.root.aesencryption.MainActivity"&gt;
  
  
  
      &lt;ListView
          android:layout_width="match_parent"
          android:id="@+id/listView"
          android:layout_height="match_parent"&gt;
  
      &lt;/ListView&gt;
  
    &lt;!--  &lt;RelativeLayout
          android:layout_width="match_parent"
  
          android:layout_height="wrap_content"&gt;--&gt;
      &lt;FrameLayout
          android:layout_width="match_parent"
  
          android:layout_height="wrap_content"
          tools:layout_editor_absoluteX="0dp"
          tools:layout_editor_absoluteY="443dp"&gt;
  
          &lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_margin="10dp"
              android:gravity="center"
              android:orientation="horizontal"&gt;
  
              &lt;ImageView
                  android:id="@+id/deviceNumberImage"
                  android:layout_width="0dp"
                  android:layout_height="wrap_content"
                  android:layout_weight="0.2"
                  android:src="@android:drawable/btn_default" /&gt;
  
              &lt;TextView
                  android:id="@+id/deviceNumber"
                  android:layout_width="0dp"
                  android:layout_height="wrap_content"
                  android:layout_weight="0.8"
                  android:text="990000862471854" /&gt;
  
          &lt;/LinearLayout&gt;
      &lt;/FrameLayout&gt;
     &lt;!-- &lt;/RelativeLayout&gt;--&gt;
  </code></pre>
  
  <p></p>
  
  <p>I don't have too much of idea about constraint layout, but when I am moving the view at the bottom from the editor, it is using property like</p>
  
  <pre><code>tools:layout_editor_absoluteX="0dp"
      tools:layout_editor_absoluteY="443dp"
  </code></pre>
  
  <p>I want to achieve the same with some property like align_parentBottom. But none of the properties is available for use. What do I need to do so that the frame layout is visible at the bottom and on the top of recycler view at the same time?
  Thanks :)</p>