title: Error:(453, 69) String types not allowed (at 'activity_horizontal_margin' with value '')
body: <p>Hi i have encountered a problem while remaking a code. This code was previously working until i messed it up by attempting to change the theme of the app. Basically there are 3 problems (Shown Below)
  1. In values.xml i get an error <strong>Error:(453, 69) String types not allowed (at 'activity_horizontal_margin' with value '').</strong>. here is the block that gives me the problem (the parent="" is where the problem occurs)</p>
  
  <pre><code>&lt;style name="Base.TextAppearance.AppCompat.SearchResult" parent=""&gt;
      &lt;item name="android:textStyle"&gt;normal&lt;/item&gt;
      &lt;item name="android:textColor"&gt;?android:textColorPrimary&lt;/item&gt;
      &lt;item name="android:textColorHint"&gt;?android:textColorHint&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <ol start="2">
  <li><p>My second problem is this and it occurs when i try to clean and/or rebuild the build. Error:Execution failed for task ':app:processDebugResources'.</p>
  
  <blockquote>
    <p>com.android.ide.common.process.ProcessException: Failed to execute aapt</p>
  </blockquote></li>
  <li><p>The R in R.id cannot be recognized. In exact words "cannot resolve symbol 'R'". Again, this code was working prior to messing around with the theme and theme editor + some updates. </p></li>
  </ol>
  
  <p>Help would be greatly appreciated. </p>
  
  <p>EDIT: I'm updating this about a year after I solved the issue (Sorry for that if anyone was following). But long story short, I couldn't find the solution; I just ended up restarting the project as it was relatively in its early stages --Not ideal, I know.</p>