title: Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.5.0-runtime and support-compat-26.1.0-runtime
body: <p>I was working on my app when this problem showed up. I don´t have any idea what that means: <em>Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.5.0-runtime (androidx.core:core:1.5.0) and support-compat-26.1.0-runtime (com.android.support:support-compat:26.1.0)</em>. <strong>Please help!</strong>
  This is my Manifest file:</p>
  <p></p>
  <pre><code>&lt;uses-permission android:name=&quot;android.permission.WRITE_EXTERNAL_STORAGE&quot; /&gt;
  &lt;uses-permission android:name=&quot;android.permission.READ_EXTERNAL_STORAGE&quot; /&gt;
  
  &lt;application
      android:allowBackup=&quot;true&quot;
      android:icon=&quot;@mipmap/ic_launcher&quot;
      android:label=&quot;@string/app_name&quot;
      android:roundIcon=&quot;@mipmap/ic_launcher_round&quot;
      android:supportsRtl=&quot;true&quot;
      android:theme=&quot;@style/Theme.JACooperationMobileApp&quot;&gt;
      &lt;activity android:name=&quot;.MemberNewsActivity&quot;&gt;&lt;/activity&gt;
      &lt;activity android:name=&quot;.MainActivity&quot; /&gt;
      &lt;activity android:name=&quot;.WeoponsBuyActivity&quot; /&gt;
      &lt;activity android:name=&quot;.WeoponsActivity&quot; /&gt;
      &lt;activity android:name=&quot;.FightsActivity&quot; /&gt;
      &lt;activity android:name=&quot;.LoginActivity&quot;&gt;
          &lt;intent-filter&gt;
              &lt;action android:name=&quot;android.intent.action.MAIN&quot; /&gt;
  
              &lt;category android:name=&quot;android.intent.category.LAUNCHER&quot; /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  &lt;/application&gt;
  </code></pre>
  <p>Tell in the comments if you need more information to solve this problem.</p>