title: ImageView doesn't appear
body: <p>I have dragged an <code>ImageView</code> to layout and I selected the picture. But when I execute the application, It doesn't appear. What can I do to solve this ?</p>
  
  <p><a href="https://i.stack.imgur.com/vG3ry.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vG3ry.png" alt="enter image description here"></a></p>
  
  <p>ImageView XML code;</p>
  
  <pre><code>&lt;ImageView
      android:layout_width="250dp"
      android:layout_height="250dp"
      app:srcCompat="@mipmap/idlepoor_moneys"
      android:id="@+id/imageView4"
      android:layout_alignParentTop="true"
      android:layout_centerHorizontal="true" /&gt;
  </code></pre>