title: how to achieve Google Play Music-like button look in my app?
body: <p>Hi I have been inspired by a Google Music app and been trying to achieve the same effect on the button when it is pressed. The shot will help u understand:</p>
  
  <p><img src="https://i.stack.imgur.com/nV1iY.png" alt="enter image description here"></p>
  
  <p>SO here the button gets that semi-transparent nice-looking effect. Unfortunately, i ve gone nowhere with it, i just managed to similar button but now it doesnt change color when i press it? Im really stuck and need help, im a novice in android dev, i have been trying selectors but when I set a selector to button background the app fails at runtime.
  Here is a screenshot of my button:</p>
  
  <p><img src="https://i.stack.imgur.com/4zXXY.png" alt="enter image description here"></p>
  
  <p>For this button, to achieve the shadow I used the <code>card_background.9.png</code> file so it also changes the whole button background to white. I assume what is why the button looses the default pressed state.</p>
  
  <p>XML code for the button:</p>
  
  <pre><code>&lt;Button
      android:id="@+id/btn"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Facebook"
      android:drawableLeft="@drawable/facebook_icon"
      android:background="@drawable/card_background"
      android:padding="15dp"
      android:textSize="20sp"
      android:drawablePadding="10dp"
      /&gt;
  </code></pre>