title: Android Studio: Images do not show up while debugging app on phone, but do on the emulator
body: <p>I have inserted an image on a blank activity:</p>
  
  <pre><code>    &lt;ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/imageView4"
      android:layout_centerVertical="true"
      android:layout_centerHorizontal="true"
      android:src="@drawable/h2ua" /&gt;
  </code></pre>
  
  <p>The image works just fine while viewing in Design, and while testing the app using a Nexus 5 emulator on my Mac. But when i transfer it to my phone, it doesn't show up. I have the exact same setup in another activity where it works just fine on my phone. I have tried inserting text on top of the image in the blank activity, and that also shows up on my phone. Any ideas of what could be wrong?</p>