title: "Unresolved class" error in in AndroidManifest.xml
body: <p>I get an error in my manifest xml file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.example.shaikhaalothman.playsongservice"&gt;
  
      &lt;application
          android:allowBackup="true"
          android:icon="@mipmap/ic_launcher"
          android:label="@string/app_name"
          android:roundIcon="@mipmap/ic_launcher_round"
          android:supportsRtl="true"
          android:theme="@style/AppTheme"&gt;
          &lt;activity android:name=".MainActivity"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
  
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
          &lt;service
              android:name=".PlaySongService"
              android:enabled="true"
              android:exported="true"&gt;&lt;/service&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p>and it gives me an error at this line:</p>
  
  <pre><code> android:name=".PlaySongService"
  </code></pre>
  
  <p>and the error reads:</p>
  
  <blockquote>
    <p>Unresolved class 'PlaySongService'</p>
    
    <p>Validates resource reference inside Android XML files.</p>
  </blockquote>
  
  <p>I haven't found anything that helps to resolve my error here on Stackoverflow, and elsewhere. Anyone that knows what I'm doing wrong?</p>