title: Shadow effect of TextView in Android Studio doesn't work
body: <p>I'm new to Android Studio and I need help with putting a shadow to my TextView. I read other topics on it and I think my code is correct. Which would mean that I might have some problem with the IDE, maybe a setting I missed or something. This is my code: </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:id="@+id/activity_main"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:context="com.example.android.giphy.MainActivity"&gt;
  
      &lt;pl.droidsonroids.gif.GifImageView
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:src="@drawable/lope3"
          android:background="#000102"
          android:id="@+id/gifImageView"
          android:layout_alignParentTop="true"
          android:layout_alignParentRight="true"
          android:layout_alignParentEnd="true" /&gt;
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentTop="true"
          android:layout_alignParentLeft="true"
          android:layout_alignParentStart="true"
          android:text="@string/main"
          android:textColor="#ffffff"
          android:padding="20dp"
          android:fontFamily="monospace"
          android:textSize="32sp"
          android:shadowColor="#f4e402"
          android:shadowRadius="5.0"
          android:shadowDy="5.0"
          android:shadowDx="5.0" /&gt;
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="@string/greeting"
          android:layout_alignParentBottom="true"
          android:layout_alignParentRight="true"
          android:layout_alignParentEnd="true"
          android:padding="20dp"
          android:textColor="#ffffff"
          android:fontFamily="monospace"
          android:textSize="32sp"    /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Unfortunately the text shadow doesn't appear. I tested it on a tablet and a phone both running Android 6.0. Any thoughts?</p>
  
  <p>Thanks.</p>