Expo-ejected app crashes with java.net.ConnectException

Question

I used Expo for my react-native app development.

Because of some packages not supported by Expo, I decided to eject my app from Expo.

I'm currently working on android studio, but stuck at this error.

    java.lang.RuntimeException: Expo encountered a fatal error: java.net.ConnectException: Failed to connect to /192.168.0.6:19000
        at host.exp.exponent.experience.BaseExperienceActivity$2.run(BaseExperienceActivity.java:206)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

If I navigate to BaseExperienceActivity.java:206,

...

// we don't ever want to show any Expo UI in a production standalone app
// so hard crash in this case
if (Constants.isStandaloneApp() && !isDebugModeEnabled()) {
 throw new RuntimeException("Expo encountered a fatal error: " + errorMessage.developerErrorMessage());
}

...

I'm not using Expo start nor react-native run:android to run the app.

I'm running the app in Android Studio.

*Edited)

Below is my current build.gradle ./android/app

buildscript {
  repositories {
    google()
    maven { url 'https://maven.fabric.io/public' }
  }

  dependencies {
    classpath 'io.fabric.tools:gradle:1.31.0'
  }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
apply plugin: 'devicefarm'

repositories {
  maven { url 'https://maven.fabric.io/public' }
}

def safeExtGet(prop, fallback) {
  rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
}

android {
  compileSdkVersion safeExtGet("compileSdkVersion", 28)

  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }

  defaultConfig {
    applicationId '######'
    minSdkVersion safeExtGet("minSdkVersion", 21)
    targetSdkVersion safeExtGet("targetSdkVersion", 28)
    versionCode 6
    versionName '1.8.0'

    multiDexEnabled true
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    // Deprecated. Used by net.openid:appauth
    manifestPlaceholders = [
        'appAuthRedirectScheme': 'host.exp.exponent'
    ]
  }
  dexOptions {
    javaMaxHeapSize System.getenv("DISABLE_DEX_MAX_HEAP") ? null : "8g"
  }

  signingConfigs {
    debug {
      storeFile file('../debug.keystore')
    }
    release {
      storeFile file(System.getenv("ANDROID_KEYSTORE_PATH") ?: "release-key.jks")
      storePassword System.getenv("ANDROID_KEYSTORE_PASSWORD")
      keyAlias System.getenv("ANDROID_KEY_ALIAS")
      keyPassword System.getenv("ANDROID_KEY_PASSWORD")
    }
  }
  buildTypes {
    debug {
      debuggable false
      // debuggable true (Original)
//      ext.enableCrashlytics = false
    }
    release {
      minifyEnabled true
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      consumerProguardFiles 'proguard-rules.pro'
      signingConfig signingConfigs.release
    }
  }
  lintOptions {
    abortOnError false
  }
  packagingOptions {
    pickFirst "**"
  }
}

devicefarm {
  projectName System.getenv("DEVICEFARM_PROJECT_NAME")
  devicePool System.getenv("DEVICEFARM_DEVICE_POOL")
  executionTimeoutMinutes 40
  authentication {

    accessKey System.getenv("AWS_ACCESS_KEY_ID")
    secretKey System.getenv("AWS_SECRET_ACCESS_KEY")
  }
}

configurations.all {
  resolutionStrategy {
    force 'org.webkit:android-jsc:r245459'
  }
}

// WHEN_PREPARING_SHELL_REMOVE_FROM_HERE

apply from: 'expo.gradle'

// WHEN_PREPARING_SHELL_REMOVE_TO_HERE

apply from: "../../node_modules/react-native-unimodules/gradle.groovy"

dependencies {
  implementation fileTree(dir: 'libs', include: ['*.jar'])

  implementation 'androidx.multidex:multidex:2.0.0'

  // Our dependencies
  implementation 'androidx.appcompat:appcompat:1.1.0'

  // (Recommended) Add the Google Analytics dependency.
  implementation 'com.google.firebase:firebase-analytics:17.2.1'

  // Add the Firebase Crashlytics dependency.
  implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'

  // Our dependencies from ExpoView
  // DON'T ADD ANYTHING HERE THAT ISN'T IN EXPOVIEW. ONLY COPY THINGS FROM EXPOVIEW TO HERE.
  implementation 'androidx.appcompat:appcompat:1.1.0'
  implementation 'com.facebook.android:facebook-android-sdk:5.0.1'
  implementation('com.facebook.android:audience-network-sdk:5.1.1') {
    exclude module: 'play-services-ads'
  }
  compileOnly 'org.glassfish:javax.annotation:3.1.1'
  implementation 'com.jakewharton:butterknife:10.2.0'
  implementation 'de.greenrobot:eventbus:2.4.0'

  implementation 'com.squareup.picasso:picasso:2.5.2'
  implementation 'com.google.android.gms:play-services-gcm:15.0.1'
  implementation 'com.google.android.gms:play-services-analytics:16.0.1'
  implementation 'com.google.android.gms:play-services-maps:15.0.1'
  implementation 'com.google.android.gms:play-services-auth:15.0.1'
  implementation 'com.google.android.gms:play-services-location:15.0.1'
  implementation "com.madgag.spongycastle:core:1.53.0.0"
  implementation "com.madgag.spongycastle:prov:1.53.0.0"
  debugImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta1'
  // debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.4-beta1'
  releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta1'
  implementation 'com.facebook.device.yearclass:yearclass:2.1.0'
  implementation 'commons-io:commons-io:1.4'
  implementation 'me.leolin:ShortcutBadger:1.1.4@aar'
  implementation 'com.theartofdev.edmodo:android-image-cropper:2.7.0'
  implementation 'commons-codec:commons-codec:1.10'
  implementation 'com.segment.analytics.android:analytics:4.3.0'
  implementation 'com.google.zxing:core:3.3.3'
  implementation 'net.openid:appauth:0.4.1'
  implementation 'com.airbnb.android:lottie:2.5.6'
  implementation('io.nlopez.smartlocation:library:3.2.11') {
    transitive = false
  }
  implementation "androidx.exifinterface:exifinterface:1.0.0"
  implementation 'com.squareup.okio:okio:1.9.0'
  implementation 'com.facebook.soloader:soloader:0.6.0'

  // expo-file-system
  implementation 'com.squareup.okhttp3:okhttp:3.10.0'
  implementation 'com.squareup.okhttp3:okhttp-urlconnection:3.10.0'

  // Testing
  androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
  // We use a modified build of com.android.support.test:runner:1.0.1. Explanation in maven-test/README
  androidTestImplementation 'androidx.test:runner:1.1.0'
  androidTestImplementation "androidx.annotation:annotation:1.0.0"
  androidTestImplementation 'com.google.code.findbugs:jsr305:3.0.0'
  androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
  androidTestImplementation 'com.azimolabs.conditionwatcher:conditionwatcher:0.2'

  androidTestImplementation 'junit:junit:4.12'
  androidTestImplementation 'org.mockito:mockito-core:1.10.19'
  testImplementation 'org.robolectric:robolectric:3.8'
  androidTestImplementation 'androidx.test:runner:1.1.0'
  androidTestImplementation 'androidx.test:rules:1.2.0'

  testImplementation 'androidx.test:runner:1.1.0'
  testImplementation 'androidx.test:rules:1.2.0'
  testImplementation 'junit:junit:4.12'
  testImplementation 'org.mockito:mockito-core:1.10.19'


  implementation('host.exp.exponent:expoview:36.0.0@aar') {
    transitive = true
    exclude group: 'com.squareup.okhttp3', module: 'okhttp'
    exclude group: 'com.squareup.okhttp3', module: 'okhttp-urlconnection'
  }




  api 'org.webkit:android-jsc:r245459' // needs to be before react-native
  api 'com.facebook.react:react-native:33.0.0'




  addUnimodulesDependencies([
      modulesPaths : [
        '../../node_modules'
      ],
      configuration: 'api',
      target       : 'react-native',
      exclude      : [
        // You can exclude unneeded modules here, eg.
        // 'unimodules-face-detector-interface',
        // 'expo-face-detector'

        // Adding a name here will also remove the package
        // from auto-generated BasePackageList.java
      ]
  ])

}

// This has to be down here for some reason
apply plugin: 'com.google.gms.google-services'

Answer 1

I've got this problem too. I found that was occurred when property debuggable is true. Please check the build.gradle file in ./android/app/. Make sure that you pick the release version instead of debug and the property debuggable in release block is not exist or the value is false. Hope this would help you.