Android Build Issues

Common Errors in APK Generation (Android Build Issues)

1. Task :app:bundleReleaseJsAndAssets FAILED

   • Error Message :

     Task :app:bundleReleaseJsAndAssets FAILED

   • Possible Solutions

     • Run the following command before building :

        npx react-native start --reset-cache

     • Try cleaning and rebuilding:

      cd android && ./gradlew clean

      cd..

      npx react-native run-android --variant=release

2. Keystore file not found for signing config release

   • Error Message :

     Keystore file '/android/app/release.keystore' not found for signing config 'release'

   • Possible Solutions :

   • Ensure your keystore file is placed in android/app/.

   • Check your android/app/build.gradle for :

      signingConfigs {
        release {
            storeFile file('release.keystore')
            storePassword 'your-password'
            keyAlias 'your-key-alias'
            keyPassword 'your-key-password'
        }
      }

   • If missing, create a new keystore :

    keytool -genkey -v -keystore release.keystore -alias my-key-alias -keyalg RSA -keysize 2048 -validity 10000

3. SDK location not found

   1. Error Message :

       SDK location not found. Define location with sdk.dir in the local.properties file.

   2. Possible Solutions :

      • Open android/local.properties and set the correct SDK path :

         sdk.dir=/Users/your-username/Library/Android/sdk  (Mac)

         sdk.dir=C:\\Users\\your-username\\AppData\\Local\\Android\\Sdk  (Windows)

      • If missing, create the file and add the path manually.\

4. app-release.apk not found after build Possible Solutions :

   • Ensure you have built the APK correctly :

      cd android && ./gradlew assembleRelease

   • The APK will be located at :

    android/app/build/outputs/apk/release/app-release.apk

5. Unable to resolve dependency for ':app@release/compileClasspath' Possible Solutions :

   • Run :

      cd android && ./gradlew clean

      ./gradlew --refresh-dependencies

   • Check if any library is missing in package.json and reinstall :

    npm install

6. React Native Hermes: Release build fails

   1. Error Message :

      error: no suitable constructor found

   2. Possible Solutions :

      • If using Hermes, ensure it's enabled :

        enableHermes: true

      • Try :

      cd android && ./gradlew clean

7. Execution failed for task ':app:mergeDexRelease'

   1. Error Message :

      Execution failed for task ':app:mergeDexRelease'.

   2. Possible Solutions :

    defaultConfig {
       multiDexEnabled true
       }

8. Install Multidex :

   npm install @react-native-community/multidex

9. Rebuild the app :

   cd android && ./gradlew clean

   npx react-native run-android --variant=release

10. Could not determine the dependencies of task ':app:compileReleaseJavaWithJavac' Possible Solutions :

    • Ensure JDK 17 is installed :

      java -version

    • If not Java 17, update it :

      export JAVA_HOME=$(/usr/libexec/java_home -v 17)

    • Rebuild the app.

11. minCompileSdk (31) is greater than compileSdkVersion (30) Error Message :

    Android dependency 'androidx.core:core' has different version for the compile

    Possible Solutions :

    • Update your android/build.gradle :

      compileSdkVersion = 33
      targetSdkVersion = 33

    • Rebuild the project :

      cd android && ./gradlew clean
      npx react-native run-android --variant=releas

12. Execution failed for task StyleSizeLength is not supported.

    Error Message :

    Invariant Violation: StyleSizeLength is not supported. You need to replace StyleSizeLength with StyleLength.

    Possible Solutions :

    • Delete the .cxx folder

      rm -rf android/app/.cxx

    • Modify the file in node_modules Navigate to:

      node_modules/react-native-svg/common/cpp/react/renderer/components/rnsvg/RNSVGLayoutableShadowNode.cpp

    • Open the file and replace all occurrences of StyleSizeLength with StyleLength.

      StyleSizeLengthReplace with StyleLength

Rebuild the project :

cd android && ./gradlew clean
npx react-native run-android or ./grdalew assebelDebug

General Fix for APK Issues

cd android

./gradlew clean

For Debug APK: ./gradlew assembleDebug 

For Release APK: ./gradlew assembleRelease

Note: Make sure that you do not use the ^ (caret) symbol while installing this package. Using ^ allows npm to automatically install a newer version, which can again lead to version mismatch problems.