title: Scaling ImageButtons for various screen sizes
body: <p>For <a href="https://play.google.com/store/apps/details?id=dpark.cellular_automata" rel="nofollow noreferrer">my app</a> (runs Android 2.1 and above),
  I was wondering how to scale buttons for various screen sizes (virtual emulators in this case) in terms of dpi, because my scaled background images seem to be "unpixelated" perfectly fine... I scaled my button ("GOT IT" as shown below) accordingly with say, an lpdi and a xxhdpi screen, and I get the following results:</p>
  
  <p>For the Nexus 5 virtual emulator (xxhdpi), button supposedly at 150X34 pixels which seems to navigate to the ldpi resource director instead:</p>
  
  <p><a href="https://i.stack.imgur.com/Kcauw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Kcauw.png" alt="enter image description here"></a></p>
  
  <p>Zoomed-in for the QVGA (ldpi), button at 57X13 pixels:</p>
  
  <p><a href="https://i.stack.imgur.com/31QcJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/31QcJ.png" alt="enter image description here"></a></p>
  
  <p>All of that said, do I need to scale down the layout(s) instead considering that I implemented the scale-button images in drawable folders (xhdpi, hdpi, mdpi, and ldpi), called it in a drawable resource file, and then set the drawable resource file as the background image of the ImageButton? Here's the XML of my button btw:</p>
  
  <pre><code>&lt;ImageButton
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:adjustViewBounds="true"
      android:id="@+id/exitBtn"
      android:layout_marginBottom="57dp"
      android:src="@drawable/popup_btn"
      android:layout_alignParentBottom="true"
      android:layout_centerHorizontal="true"
      android:scaleType="centerCrop"
      android:background="@android:color/transparent" /&gt;
  </code></pre>
  
  <p><strong>P.S.</strong> Is the scaled-drawable folder, xhdpi, the default location for xxhdpi screens as well? How about for xxxhdpi and above?</p>