title: Android add traslucid overlayer to image
body: <p>I'm begginer in android. I'm developing an app, and I want this effect: </p>
  
  <p><img src="https://i.stack.imgur.com/DVXHW.png" alt="enter image description here"></p>
  
  <p>I think it is a background image, an overlay whit traslucid color, and a <code>textView</code>.</p>
  
  <p>My layout is this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent" &gt;
  
  &lt;ImageView
      android:id="@+id/backgroundImage"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_alignParentTop="true"
      android:contentDescription="Description" /&gt;
  
  &lt;ImageView
      android:id="@+id/overlay"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_alignParentTop="true"
      android:background="#AAFF0000"
      android:contentDescription="Description" /&gt;
  
  &lt;TextView
      android:id="@+id/textoOpcion"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_alignParentTop="true"
      android:text="TextView" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>But this doesn't work.</p>
  
  <p>Any idea to do it?</p>
  
  <p>Thanks.</p>