title: Black color comes instead a transparent background for textview in android
body: <p>The following two pics are a <strong>TextView</strong> with the following properties in it:</p>
  
  <pre><code>&lt;TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:background="@drawable/button_style"
              android:text="select password"
              android:textColor="@color/dif_black"/&gt;
  </code></pre>
  
  <p>and the <strong>button_style.xml</strong> is</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;layer-list &gt;
  &lt;item&gt;
      &lt;shape&gt;
          &lt;stroke
              android:width="2dp"
              android:color="#88C425" /&gt;
          &lt;corners android:radius="20dp" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  </code></pre>
  
  <p></p>
  
  <p>First pic taken from Canvas 2, Second pic taken from Samsung Galaxy Fame . Here is the problem I don't want the black color to be filled inside the <strong>textview</strong> border(Stroke). You would have noticed in the first pic that the background of the <strong>textview</strong> is transparent. I want this same in all android devices to be a transparent background.</p>
  
  <p><img src="https://i.stack.imgur.com/wBS3I.png" alt="First picture with transparent background comes for Canvas 2"> <img src="https://i.stack.imgur.com/VOatG.png" alt="enter image description here"></p>