title: What does Program Type Already exists means?
body: <p>I am a beginner to android studio, and I get the runtime error</p>
  
  <pre><code>Program type already present: 
  android.support.v7.util.AsyncListUtil$DataCallback
  Message{kind=ERROR, text=Program type already present: 
  android.support.v7.util.AsyncListUtil$DataCallback, sources=[Unknown source 
  file], tool name=Optional.of(D8)}
  </code></pre>
  
  <p>I searched it up and I couldn't find anything, I think it might have something to do with my manifest file though. Here is my manifest.</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  package="com.example.dadei.cashmob"&gt;
  
  &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.INTERNET" /&gt;
  &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.READ_CALENDAR" /&gt;
  &lt;uses-permission android:name="android.permission.WRITE_CALENDAR" /&gt;
  &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt;
  &lt;uses-permission android:name="android.permission.VIBRATE" /&gt;
  &lt;meta-data android:name="com.google.android.gms.version"
      android:value="@integer/google_play_services_version" /&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:hardwareAccelerated="true"
      android:theme="@style/AppTheme"&gt;
      &lt;activity
          android:name=".MainActivity"
          android:theme="@style/Theme.AppCompat.Light.NoActionBar"&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;activity
          android:name=".Homescreen"
          android:theme="@style/Theme.AppCompat.Light.NoActionBar" /&gt;
      &lt;activity
          android:name=".signup"
          android:theme="@style/Theme.AppCompat.Light.NoActionBar" /&gt;
      &lt;activity android:name=".videos"&gt;&lt;/activity&gt;
  &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p>Heres my dependencies. The error might be there as a well.</p>
  
  <pre><code>implementation 'com.android.support:appcompat-v7:27.1.1'
  implementation 'com.google.android.gms:play-services-location:15.0.0'
  implementation 'com.android.support.constraint:constraint-layout:1.1.0'
  implementation 'com.google.firebase:firebase-auth:15.0.0'
  implementation 'com.google.firebase:firebase-database:15.0.0'
  implementation 'com.google.android.gms:play-services-auth:15.0.0'
  implementation 'com.android.support:support-v4:27.1.1'
  testImplementation 'junit:junit:4.12'
  androidTestImplementation 'com.android.support.test:runner:1.0.2'
  androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
  implementation 'com.google.android.gms:play-services-ads:15.0.0'
  compile 'com.google.android.gms:play-services-base:15.0.0'
  compile 'com.google.android.gms:play-services-ads:15.0.0'
  compile 'com.google.android.gms:play-services-location:15.0.0'
  compile 'com.google.android.gms:play-services-plus:15.0.0'
  implementation 'com.android.support:design:27.1.0'
  compile 'com.android.support:support-v4:27.1.0'
  compile 'com.android.support:recyclerview-v7:27.1.0'
  
  compile 'com.android.support:multidex:1.0.3'
  
  
  compile 'com.google.android.gms:play-services-ads:15.0.0'
  compile 'com.android.support:support-annotations:27.1.1'
  
  compile 'com.squareup.picasso:picasso:2.5.2' //for Inmobi
  compile name: 'adcolony-sdk-3.2.1', ext: 'aar'
  compile name: 'mmedia-6.4.0', ext: 'aar'
  compile name: 'mobvista_alphab', ext: 'aar'
  compile name: 'mobvista_appwall', ext: 'aar'
  compile name: 'mobvista_appwallext', ext: 'aar'
  compile name: 'mobvista_common', ext: 'aar'
  compile name: 'mobvista_interstitial', ext: 'aar'
  compile name: 'mobvista_mvdownloads', ext: 'aar'
  compile name: 'mobvista_mvjscommon', ext: 'aar'
  compile name: 'mobvista_mvnative', ext: 'aar'
  compile name: 'mobvista_nativeex', ext: 'aar'
  compile name: 'mobvista_offerwall', ext: 'aar'
  compile name: 'mobvista_playercommon', ext: 'aar'
  compile name: 'mobvista_reward', ext: 'aar'
  compile name: 'mobvista_videocommon', ext: 'aar'
  compile name: 'mobvista_videofeeds', ext: 'aar'
  </code></pre>
  
  <p>I don't get an error when I sync my gradle, but just in case. </p>