title: TextView can't set drawableLeft(or Top,Right,Bottom) with Shape drawable?
body: <p>I defined a shape drawable ,it's a line.</p>
  
  <pre><code>&lt;shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="line" &gt;
  &lt;stroke android:color="#f00" android:width="2dp"/&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>and then I set this shape in TextView's drawableBottom,but it didn't work.</p>
  
  <pre><code>&lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:drawableBottom="@drawable/shape_line"
      android:drawablePadding="5dip"
      android:text="Hello World" /&gt;
  </code></pre>
  
  <p>why and how can let it work?</p>