title: Cannot fit requested classes in a single dex file (# methods: 86010 > 65536)
body: <p>I don't know what the error means. I'm trying to do an uber app from youtube that uses Firebase and got this error.</p>
  
  <blockquote>
    <p>Cannot fit requested classes in a single dex file (# methods: 86010 > 65536)
    com.android.tools.r8.CompilationFailedException: Compilation failed to complete.</p>
    
    <blockquote>
      <p>build.gradle(app)</p>
    </blockquote>
  </blockquote>
  
  <pre><code>    apply plugin: 'com.android.application'
      apply plugin: 'com.google.gms.google-services'
      android {
          compileSdkVersion 28
          buildToolsVersion "29.0.2"
          defaultConfig {
              applicationId "com.example.ezbusjava"
              minSdkVersion 16
              targetSdkVersion 28
              versionCode 1
              versionName "1.0"
              testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
          }
          buildTypes {
              release {
                  minifyEnabled false
                  proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
                  debuggable = true
                  signingConfig signingConfigs.debug
              }
          }
      }
      dependencies {
          implementation fileTree(dir: 'libs', include: ['*.jar'])
          implementation 'androidx.appcompat:appcompat:1.1.0'
          implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
          implementation 'com.google.firebase:firebase-analytics:17.2.2'
          implementation 'com.google.firebase:firebase-auth:19.2.0'
          implementation 'com.google.firebase:firebase-firestore:21.3.1'
          implementation 'com.google.firebase:firebase-database:19.2.0'
          testImplementation 'junit:junit:4.12'
          androidTestImplementation 'androidx.test.ext:junit:1.1.1'
          androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
      }
  </code></pre>
  
  <blockquote>
    <p>build.gradle(project)</p>
  </blockquote>
  
  <pre><code>buildscript {
      repositories {
          mavenCentral()
          google()
          jcenter()
  
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.5.3'
          classpath 'com.google.gms:google-services:4.3.3'
      }
  }
  
  allprojects {
      repositories {
          mavenCentral()
          google()
          jcenter()
  
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>