title: Android drawable background doesn't show on devices
body: <p>I want to give to a TextView a background. This background (classement_background.xml) is a drawable located in res/drawable.</p>
  
  <p>Here's its code :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  
      &lt;shape
          android:shape="ring"
          xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  
          &lt;gradient
              android:startColor="#ff648add"
              android:endColor="#ff3656dd"
              android:type="linear"
          /&gt;
      &lt;/shape&gt;
  </code></pre>
  
  <p>In the render window of the layout file, my background is set. (Android studio)</p>
  
  <p>But for some reason, this drawable is not there anymore on a genymotion emulator nor an actual device. </p>
  
  <p>I've been trying quite a few things (like making sure it isn't the first element in the drawable folder), but I can't figure out what's going on. Any thoughts ? </p>
  
  <p>Here's the code from the textview itself : `</p>
  
  <pre><code>&lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="E2"
      android:id="@+id/classement"
      android:layout_below="@+id/firstname"
      android:layout_centerHorizontal="true"
      android:textSize="85dp"
      android:layout_marginTop="15dp"
      android:padding="30dp"
      android:background="@drawable/classement_background"
      android:textColor="@android:color/white"/&gt;`
  </code></pre>